Rig Risk Assessment

IRP 22 Hazard and Risk Assessment Register Column Headings Column .etter Operational Phase

A

Categorization of the hazard scenario by operational phase.

I t em

B

te! nu!ber for hazards.

UBD/MPD/Both

C

dentification of "hether the hazard applies to #$D% &'D or $oth ($)

Hazard !enario "hat I#

D

-ingle 6eopardy state!ent used to identify potential proble!s due to failure in pre76ob planning% training% procedures% or euip!ent failure.

Appli!a$le

%

Choose *+* if *,azard -cenario hat f* applies to operation and */* if it does not.

&hreats/Conse'uen!es

(

A list of the potential conseuences (,-1 and /'T) of the *"hat if* occurring.

H%

)

The ris of a situation3e4ent "ith the potential to cause har! (to people% assets% or the en4iron!ent).

*P&

H

The ris of /on 'roducti4e Ti!e (/'T)% including lost ti!e and costs% for!ation da!age and3o r any de4iation fro! the plan.

Re'uired H H% Cr Criti!al Co Controls / a#eguards

O

Controls3safeguards% and detailed reco!!ended practices for high ris ,-1 ite!s and ref erenced to specific prescripti4e R' 22 enforced reuire!ents.

Considerations

+

Reco!!endations% considerations% and infor!ational state!ents on ho" to reduce% eli!inate% or !anage &ediu!38o" Ris ,-1 ite!s and all /'T ite!s.

A!tions to $e &aken / B, "ho and "hen

-

8ist of actions reuired to reduce3eli!inate the potential occurrence and3or se4erity if the hazard cannot be eli!inated entirely. ho  'arty3parties responsible for each action assigned. hen  Date by "hich the action is to be co!pleted.

Primar, Responsi$le Part,

.

Categorization of the hazard scenario by p ri!ary responsible party.

Primar, Categor,

M

Categorization of the hazard scenario by pri!ary category (euip!ent% "ell progra!% etc.)

Risk Ranking  se0erit, o# the e0ent 1!onse'uen!e multiplied $, likelihood o# o!!urren!e 3

High Risk 7 1ngineering% 'rocedures% and Training reuired to control3!itigate ris.

2

Medium Risk 7 'rocedures and Training reuired to control3!i tigate ris. -hould consider 1ngineering.

4

.o5 Risk 7 Training reuired to control3!itigate ris. -hould consider 1ngineering and 'rocedures.

)eneral *otes a$out Register Register is di4ided into 5 sections% coinciding "ith the operational phases of #$D3&'D3AD operations. Additional Additional ite!s !ay be added added to each each section by the R' R' co!!ittee co!!ittee or the end end user. user. The list of ite!s in the register is not not e:hausti4e e:hausti4e and "ill change change "ith ti!e ti!e as additional hazards are identified. 8ast ite! nu!ber used (as of 20;<70=7;;) is> 225 $egin any additional nu!bering "ith 229. /ote that ?;<2 "as deleted as it "as redundant. The R' 22 Co!!ittee in4ites organizations to share lessons learned and additions to the Risk Register by by e!ailing safety@enfor!.ca

June 2009

DRAFT

R' 22 7 ,azard and Ris Assess!ent Register

Operational Phase

Item

Rele0an!e 1UBD/MPD/ Both

Hazard !enario "hat I# 6

e l $ a ! i l p p A


;

;

22.;.=.2 22.2.2.= 22.2..=

;

;

22.;.=.B 22.=.=.;

,ar! to personnel. 8ost ti!e and cost.

;

;

22.=.B

'otentially "ash3"ear casing bo"l% and cause RCD failure or $' failure. 'otential loss of "ell control if bo"l "ears out.

;

;

Fluid carryo4er !ay cause a fire% + en4iron!ental da!age3in6ury. da!age3in6ury. ait on right size euip!ent.

;

&'D 1uip!ent Rental

!rproper euip!ent size. nadeuate reuired surface bac + pressure. 'otential gas inflo". 'otential "ell control issues.

Threaded unions are used in high pressure pipe "or. &e!brane nitrogen is used in sour en4iron!ent

'oor uality control in /'T thread + design3!anufacture !ay result in flo"line failure. ,igh corrosion rate. + 'otential fla!!able conditions.

$T,

Condensate carryo4er

+

$T,

Failure to flush3purge lines% 4essels% surface euip!ent

;

$T,

!proper elly (suare 4s. he:)

;. 'lanning

2

$T,

8ease size inadeuate

;. 'lanning

=

$T,

Concurrent rig up of rig and #$D3&'D pacage causes confusion

+

;. 'lanning

B

$T,

!proper rig align!ent

+

;. 'lanning

<

$T,

!proper separator 7 too s!all

;. 'lanning

22=

&'D

;. 'lanning



$T,

;. 'lanning



#$D

;. 'lanning

5

-pill 7 en4iron!ental da!age -tart fire in i!!ediate 4icinity

;. 'lanning

;0

$T,

$arrier Failure

;. 'lanning

;;

$T,

nsufficient tan far! ber!s

,2- e:posure to personnel. 8o" + 4olu!e% high concentration. 'otential for in6ury3death. 8oss of $ arrier. + 'otential for in6ury3death. Release of drilling fluid to + en4iron!ent.

;. 'lanning

;2

$T,

eneral ,2- concerns

+ 'otential for in6ury3death.

2 of 2

9


Considerations

Primar, Categor,

A!tions to $e taken / B, "ho and "hen

RCD leaage. n6ury to personnel. #nable to run suare elly through + RCD. Delay in drilling "ell (lost ti!e and cost). 'oor e!ergency response. 'roble!s fitting euip!ent on location. Decreased access3egress in case of + e!ergency. nadeuate flare spacing on location. Tree clearance could cause forest fire. Delay in rig up and startup of operations

;. 'lanning

;. 'lanning

Re'uired H% Controls / a#eguards

% &  PCriti!al H *

#se he: elly% suare elly not reco!!ended. #se po"er s"i4el instead of elly. #se top dri4e instead of elly. #se coiled tubing. RCD supplier standard operating procedures 3 ris register. Drill string diagra!. Eerify rig specific l ayout accuracy. 'ri!ary #$D3&'D ser4ice supplier to pro4ide site specific lease spacing diagra!. 'ri!ary #$D3&'D ser4ice pro4ider to conduct site inspection as soon as possible. #se drill side pipe racs only (if possible). Eerify regulatory stac height3flaring reuire!ents.

Rig Rig Con Contr trac acto torr

Rig Rig 1ui 1uip! p!en entt

#$D3&'D -eparation -er4ice 'ro4ider

nsite super4isors to for!ulate rig up plan. Co!pany !an to coordinate o4erall strategy. -afety hand to be in4ol4ed during rig up.

perating Co!pany

8ease Reuire!ents

22.2..=

Chec rig align!ent before nippling up $'3RCD. Chec rig align!ent during #$D3&'D operation.

Rig Contractor

RCD

;

22.;.=.B 22.;.=.<

Conduct re4ie" "ith reser4oir3production reser4oir3production engineers regarding potential inflo" rates. Re4ie" separator sizing reuire!ents "ith ser4ice co!pany.


;

;

ne" R'22 section T$D

Conduct re4ie" "ith reser4oir3production reser4oir3production engineers regarding potential inflo" rates. Re4ie" separator sizing reuire!ents "ith ser4ice co!pany. Re4ie" offset infor!ation for the area.

&'D 1uip!ent &'D3#$D 'ro4ider 1uip!ent Rental

;

;

22.2.B.;

/o threaded unions to be used for other than shipping lines.

#$D3&'D Choe3Flo"line -er4ice 'ro4ider

;

;

22.;.=.;

perating Co!pany

 ell 'rogra!

;

;

22.;.=.B 22.;.=.<

Consider use of ser4ice gas that does not contain o:ygen. Choose appropriately sized separator for flush production. Re4ie" procedures for transient operations (such as initial blo"do"n).

perating Co!pany

ell 'rogra!

;

;

22.=.;=

;

;

;

;

22.;.=.B 22.=.;B

;

;

22.=.;=

'urge "ith an inert gas. Consider 2 barrier "hen pipe is static. ,igh ,2- content should !ae barrier policy !ore 4isible. Applicable pro4incial regulations to be follo"ed. 1uip!ent spacing% 4enting and issues regarding personnel safety !ust be addressed throughout the entire lease for the entire operation.

0B3;0320;

#$D3&'D -eparation -er4ice 'ro4ider perating Co!pany perating Co!pany perating Co!pany

ell 'rogra! -eparation 8ease &anage!ent

DRAFT


Operational Phase

Item



e l $ a ! i l p p A



Considerations

Primar, Categor,


;

;

22.;.=. 22.=.;<

1li!inate one ele!ent of the reuire!ents for co!bustion (fuel% o:ygen% or ignition source). Consider inert gas operations. /e4er flo" returns to a closed separator. Add inert gas to reduce fla!!ability.

Air Drilling 7 #ne:pected 'otential for do"nhole fire and3or + hydrocarbon zone ignition at surface. encountered

;

;

22.;.=. 22.=.;<

#se inert gas if the ris of creating conditions suitable for co!bustion e:ists. Consider inert gas operations.

perating Co!pany

ell 'rogra!

#$D

Air Drilling 7 &ud ring occurs "ith co!bustible !i:ture in hole.

;

;

22.=.;<

&onitor hole cleaning and fluid influ: carefully "hile drilling. Consider inert gas operations.

perating Co!pany

ell 'rogra!

;

#$D

Coiled Tubing 7 Coil pac7off fails

;

;

22.=.; 22;.=. R'2;

$egin operation "ith ne" stripper ele!ents. nspect sealing ele!ents after each trip. $ac up ele!ents a4ailable on location. &onitor for leaage during operation.

RCD -uppli er

Trai ni ng

;

$T,

;

;

22.=.; R' 2;

Carefully define coil operating li!its. &onitor coil fatigue life. 'ressure test coil before 6ob. #se appropriate corrosion inhibitor pacage. &ini!ize high pressure coil cycling.

Coil Tubing Contractor

ell 'rogra!

ell 'rogra!

;. 'lanning

;=

#$D

Air Drilling 7 818 and #18 "ithin fla!!able li!its

;. 'lanning

;B

#$D

;. 'lanning

;<

;. 'lanning

;. 'lanning

Coiled Tubing 7 Coil string failure (do"nhole "ashout)

+

Fla!!able !i:ture% potential for fire3e:plosion.

'otential for do"hnole ignition. + 8oss of $,A% da!age to euip!ent% potential for in6ury3death% loss of "ell. as3Fluid at rig floor (potential hydrocarbon release% ignition or fire). + ,ar! to personnel. For!ation da!age if "ell !ust be illed. 'otential loss of "ell. For!ation da!age if "ell has to be + illed. ncreased ris to personnel "hile tripping. as3fluid release at rig floor (potential hydrocarbon release3ignition3fire). ,ar! to personnel. For!ation da!age if "ell !ust be illed. 1n4iron!ental da!age.

;. 'lanning

;5

$T,

Coiled Tubing 7 Coil string failure (surface "ashout)

+

;. 'lanning

;9

$T,

nadeuately 4ented *closed* at!ospheric tans.

'ressure build up in at!ospheric tans due to high liuid flo" rate or + high solution gas content leading to possible tan rupture% personnel in6ury or en4iron!ental spill.

;. 'lanning

20

$T,

Te!porary pipe and ha!!er union !is!atch

;. 'lanning

2;

$T,

Failure to note losses% possibly leading to loss3ic situation

;. 'lanning

22

$T,

,igh te!perature (i.e. ,',T "ells) e:ceeding $' seals te!perature rating

= of 2



ith se4eral and di4erse co!panies on site the potential for !is!atched ha!!er union connections are greatly + increased. Threat of personnel in6ury and en4iron!ental spills. 'ossible inadeuate returns !onitoring and3or flo" !odeling fails to recognize losses in zone of greater depletion3lo"er pore pressure than + planned for. 'ossibility of "ell ic e:ceeding euip!ent rating% personnel in6ury% euip!ent da!age or loss of "ell. ,',T "ells surface te!perature e:ceeding $'% etc. te!perature + rating leading to pre!ature failure% loss of contain!ent% personnel in6ury% loss of "ell control.

perating Co!pany

ell 'rogra!

.

;

;

22.=.; R' 2;

Carefully define coil operating li!its. &onitor coil fatigue life. 'ressure test coil before 6ob. #se appropriate corrosion inhibitor pacage. &ini!ize high pressure coil cycling. Run lea point bac into "ell if possible.


;

;

22.=.;< 22.;.=. R' 2;

1nsure installation design considers !a:i!u! input rates to closed at!ospheric tans and sufficiently sized 4ent lines are pro4ided.


;

;

22.2.B.;

1nsure clear policy and direction is pro4ided on acceptable te!porary pipe design and ha!!er unions. $an ha!!er unions "ith potential for !is!atch.


;

;

22.=.;2

1nsure adeuate !onitoring% early recognition of losses% "ell planned "ell control procedures.

Rig Contractor

&ud -yste!

;

;

22.;.=.;

For ,',T "ells consider use of additional te!perature !onitoring and 1-D procedures for Te!perature ,, conditions at $' stac. #se proper sealing rubber for high te!perature.

perating Co!pany

$' -yste!

0B3;0320;

DRAFT


Operational Phase

Item


;. 'lanning

2=

$T,

;. 'lanning

2B

$T,

;. 'lanning

2<

$T,

;. 'lanning

2

#$D

;. 'lanning

2

$T,

;. 'lanning

25

$T,


'orted floats are used

#nclear lines of authority nadeuate fire protection :ygen deficient en4iron!ents Response to alar! condition is not clearly defined &ultiple alar! syste!s on location

e l $ a ! i l p p A





+

;

2

22.2.=

#se 2 non7ported float 4al4es. Run /RE as contingency for drop7in chec 4al4e.

+

Ris to personnel% euip!ent% en4iron!ent.

;

2

22.2.=

All lines of authority to be clearly defined in progra!3pre7 spud.

+ n6ury% loss of euip!ent.

;

2

22.;.=.

+ 'otential for in6ury.

;

2

22.=.=

dentify potentially o:ygen deficient areas and include in onsite orientation. orers in high ris areas !ust "ear appropriate !onitoring de4ice.

All

/3A

ell 'rogra! 8ease Reuire!ents

;

2

22.=.=

Clearly define response to alar! c onditions and co!!unicate the response to personnel on location.

perating Co!pany


+

Confusion on location increases ,-1 riss.

;

2

22.=.=

Clearly define response to alar! c onditions and co!!unicate the response to personnel on location.

perating Co!pany


#se enclosed cutting separation process. Eacuu! degas fluid3solids strea! before cuttings separation. &onitor3alar! any area "here there is a potential for a sour gas release.


,2- 7 To:ic gas released during cuttings separation process.


;

2

22.=.;=

;. 'lanning

=0

$T,

,2- 7 To:ic gas released fro! fluid storage syste!.


;

2

22.=.;=

;. 'lanning

=;

$T,


;

2

22.=.;= 22.;.=.2

;. 'lanning

=2

$T,

;. 'lanning

==

$T,

;. 'lanning

=B

$T,

;. 'lanning

=<

$T,

;. 'lanning

=

$T,

B of 2

perating Co!pany perating Co!pany

/RE

Confusion on location increases ,-1 riss.

$T,

&uster area is not clearly defined. ,2- 7 1lasto!er failure3inco!patibility -hortage of e:perienced people in planning stages

/RE -upplier

+

29

il $ased &ud 7 -olution gas release fro! drilling !ud

Primar, Categor,

'ressure co!!unicated to surface through drill pipe. Cannot hold bac pressure on annulus as pressure is co!unicated to surface through drill pipe.

;. 'lanning

,2- 7 To:ic gas release "hen sa!pling cuttings ,2- 7 !proper sour ser4ice !aterial selection


Considerations

+

Rapid degradation of steel 7 not fit for ser4ice.

;

2

22.=.;=

+

Ris of fire3e:plosion and personnel e:posed to har!ful 4apors.

;

2

22.=.;0 22.=.;B

;

=

22.=.=

;

=

22.=.;=

2

;

ncreased ris for personnel to search location for !issing "orers. 8oss of $arrier. + 'otential for in6ury3death. nability to identify all safety critical + issues in the operation. +

#se enclosed fluid separation process. Eent tans through scrubbers. &onitor3alar! any area "here there is a potential for a sour gas release fro! the fluid storage syste!. 'urge "ith non7to:ic or inert gas before opening sa!pler. Full re4ie" of /AC1 &R 0;<3/AC1 ;<;< for , 2"ells. Re4ie" R' ; Critical -our Drilling Calculate 4olu!e of gas released fro! separator pressure to at!ospheric pressure. 8o" pressure separator reduces gas in solution. #se separate fluid storage syste! "ith totally enclosed and 4ented tans. Clearly define !uster area during "ellsite safety !eetings. Aniline testing elasto!ers. 'roper !aterial selection for elasto!ers. 1nsure that personnel planning the operation are co!petent to do so.

0B3;0320;

#$D3&'D -eparation -er4ice 'ro4ider #$D3&'D -eparation -er4ice 'ro4ider perating ell 'rogra! Co!pany #$D3&'D -eparation -er4ice 'ro4ider perating Co!pany perating Co!pany perating Co!pany

8ease Reuire!ents ell 'rogra! /3A

DRAFT


Operational Phase

;. 'lanning

Item

=


$T,


e l $ a ! i l p p A





RCD leaage. n6ury to personnel. + 're!ature RCD ele!ent "ear. Delay in drilling "ell (lost ti!e and cost).

2

2

;

;

;. 'lanning

=5

$T,

$,A plan includes running spiral drill collars or other non7 strippable co!ponents.

RCD leaage. n6ury to personnel. + #nable to strip through RCD ele!ent. Delay in drilling "ell (lost ti!e and cost).

;. 'lanning

=9

$T,

oring on pad "ells

+

-i!ultaneous operations on pad "ells increases ris of ,-1 incidents.

2

;

;. 'lanning

B0

$T,

Cre" shortage and3or ine:perience

+


2

;

;. 'lanning

B;

$T,

/RE seal co!patibility "ith fluid

+ 'otential for /RE to fail pre!aturely.

2

;

;. 'lanning

B2

$T,

Rental euip!ent in poor repair

+

2

;

B=

$T,

,igh Rate Flaring

+

;. 'lanning

BB

$T,

,igh ,2- Flaring

;. 'lanning

B<

$T,

nadeuate lease spacing for flare.

< of 2

Primar, Categor,

#se dill pipe "ithout groo4es. #se pipe "ith no hardbanding. #se drillpipe "ith flush hardbanding. -er4ice elly to eli!inate s harp edges and ensuring elly is as straight as possible. RCD supplier pre76ob inspection.

Condition of drill pipe and elly (groo4es% e:ternal scale% etc.)

;. 'lanning


Considerations

1uip!ent failure during critical ti!es !ay ele4ate e:isting ,-1 riss. 1:ceed 4olu!e li!its% -hut in "ell% cease operations.

2

;

1:ceed allo"able li!its for -2 7 + ;2ppb34olu!e. -hut in "ell% cease operations.

2

;

+ Ris of forest fire.

2

2

Drill pipe3elly inspection. RCD supplier -'s3ris register. Drill string diagra!. Gelly sa4ers "ith rubber inserts are not reco!!ended as they can se4erely da!age the RCD ele!ent. A4oid abrupt D transitions bet"een Gelly and drill pipe. Re4ie" all drill sting co!ponents for strippability and sealability "ith the RCD. -piral drill collars% 6ars% bu!per subs and stabilizers are not reco!!ended. Function3stripping tests of odd7profile $,A co!ponents (on and3or offsite) is reco!!ended. A4oid use of elly 4al4es "ith rubber casing sa4ers. Replace spiral DC "ith Rigid DC or ,D'.

22.=.2.2

Deter!ine "hether other operations "ill occur on pad at the sa!e ti!e as the drilling operation. 1nsure that one site super4isor is appointed and that lines of authority are clear. nsite orientation and training. -uper4isors to ensure that all personnel ha4e been trained in the 4arious co!ponents of the rig up operation. dentify tass in tool bo: safety !eetings. 1nsure all "orers understand their right to refuse unsafe "or% or reuest training3guidance for tass that they are not yet co!petent in. Consider 1&- onsite during rig up operations. Focus on shift change co!!unication infor!ation transfer. Chec R' 22.=.2.2 perational Co!!unications Consider !ultiple /REs in $,A. Consider !etal3!etal seals. Test seals "ith drilling fluid3reser4oir fluid prior to drilling operation. Consider profile nipple do"n hole as a bacup. nspect all rental euip!ent upon arri4al on location. ,igh ' "ell probability% build so!e HfatH into !odeling% calculations and per!it applications. A1R Directi4e 0> #pstrea! 'etroleu! ndustry Flaring% ncinerating% and Eenting (see """.aer.ca) as Chro!atograph to ualify !odeling. Continuous ,2- content !onitoring in fluid strea!. A1R Directi4e 0> #pstrea! 'etroleu! ndustry Flaring% ncinerating% and Eenting (see """.aer.ca) Consult appropriate forestry regulations. 1nsure reuired fire !itigation is in place (sprinler syste!% "ater storage% etc.) 0B3;0320;

Rig Contractor

Drill -tring

perating Co!pany

Drill -tring

perating Co!pany


All

/3A

/RE -upplier

/RE

perating Co!pany

All

perating Co!pany

ell 'rogra!

perating Co!pany

ell 'rogra!

perating Co!pany

-eparation DRAFT


Operational Phase

Item


;. 'lanning

B

$T,

;. 'lanning

B

$T,

;. 'lanning

B5

$T,

;. 'lanning

B9

$T,

;. 'lanning

;. 'lanning

<0

<;

$T,

+

ncreased potential for ,-1 incidents such as slips% trips or falls.

2

2

+

Conta!ination of fluids on location "ith prior 6ob "aste.

2

2

nspect euip!ent upon arri4al and before being released.

perating Co!pany

Deter!ine responsibility during pre7spud and confir! in onsite safety !eetings. Co!!unicate riss of bears% etc. during safety !eeting. 1stablish protocol for personnel lea4ing location on foot.

perating Co!pany perating Co!pany

For!al Chain of co!!and. For!al locout3tagout3control of "or. For!al 'T38ogistics 'lan. Re4ie" R'  -tandards for ellsite -uper4ision of Drilling% Co!pletions and oro4ers.

All

22.;.<.<

Cold 4enting (regulatory e:e!ption !ay be reuired). Auto!atic liuid high le4el shut7do"n in separator. Flare stac spacing% height and ground clearance fro! co!bustable !aterials. 'rocedures and euip!ent in place for !anaging separator le4el if le4el no high le4el shut7do"n. Audible and 4isual alar!. 1nsure adeuate redundancy of pressure shipping and pu!p shipping capacity.


22.;.<.<

Auto!atic liuid lo" le4el shut7do"n in separator. 'rocedures and euip!ent in place for !anaging separator le4el if le4el no lo" le4el shut7do"n. Audible and 4isual alar!. 8183#18 gas !onitoring and alar!ing at the shaer 8iuid shipping to a re!ote tan syste!.


#se of supple!entary fuel gas ('ropane). A1R Directi4e 0> #pstrea! 'etroleu! ndustry Flaring% ncinerating% and Eenting (see """.aer.ca)

perating Co!pany

'otential euip!ent failure if not used + properly.

2

2

+ Ris to personnel or "ildlife.

2

2

+

/oise% pressure% 4ibration% egress% co!!unication 7 &isco!!unication'otential for in6ury3death.

2

;

2

Trying to flare "ith high C2 !olI

+ /o burn 7 cold 4ent.

2

2

il $ased &ud 7 ncreased solubility in oil based !ud (R 4ariability)

+

2

2

2

2

2

=

#$D

;. 'lanning

$T,

;. 'lanning

<<

#$D

$T, $T,

Coiled Tubing 7 -lips fail to hold $,A co!ponents Drill string /REs !issing or "rong size3thread Flare gun ignites forest or grassland

-pill 7 en4iron!ental da!age Fire% e:plosion fro! flare stac% personnel e:posure -eperator o4er7pressure

2

as at rig tans. + Fire% e:plosion% personnel e:posure.

<=

 of 2

1uip!ent3'ersonnel Congestion

Primar, Categor,


-eparator gas carry7 under do"n the liuid shipping lines

;. 'lanning

<

1:posure to "ildlife


Considerations

Conduct re4ie" of lighting reuire!ents "ith ser4ice co!panies at pre7spud. Consider constructing a lighting diagra!. Rent light to"ers as reuired.

+

$T,

;. 'lanning

1uip!ent not flushed3cleaned pre3post 6ob #nclear responsibility for rental euip!ent



-eparator liuid carry7 o4er into flare line and3or shipping pu!p failure

<2

<

nadeuate lighting.


$T,

;. 'lanning

;. 'lanning


e l $ a ! i l p p A

'oor ,2- -tripping 3 -eparation. 'otential for in6ury3death.

Tools dropped in hole% resulting in lost + ti!e% high7ris fishing operation. 'otential gas3fluid release at rig floor. /o drill string "ell control. Delay in drilling "ell (lost ti!e and + cost). Drill string da!age. + Ris to en4iron!ent3personnel.

;

2

2

=

perating Co!pany


-eparation All 8ease Reuire!ents

8ease &anage!ent

ell 'rogra!


R'2;

&anage ris "ith appropriate procedures and checs to !ae sure slips are engaged and holding. Consult Tubing perations ait on R'2; correctCoiled /REs3subs. /RE supplier standard operating procedures3ris register. Drill stringusing diagra!. Consider an auto7ignition syste! if flaring in an area or ti!e of year "hen there is a high ris of fire.

0B3;0320;


ell 'rogra!

/RE -upplier

/RE


DRAFT


Operational Phase

Item



;. 'lanning

<5

$T,

RCD doesnt fit under sub

;. 'lanning

<9

$T,

1uip!ent a4ailable3Ti!ing

;. 'lanning

0

#$D

;. 'lanning

;

$T,

;. 'lanning

2

$T,

;. 'lanning

=

$T,

;. 'lanning

B

$T,

!properly specified 'D&s

Du!p subs in !otors are not blaned off -olids 7 Eac truc handling -olids 7 re7in6ection do"n drill string

<

$T,

;. 'lanning



$T,

Re7entry 7 Casing e:it debris in "ell

;. 'lanning



$T,

-olids 7 "aste !anage!ent

5

$T,

;. 'lanning

220

#$D

 of 2


Atte!pts to try and fit RCD could cause in6ury to personnel. Can not drill #$D3&'D. + Delay in drilling "ell (lost ti!e and cost).

+

Flush 8iuid 'roduction Aspiration of 2 fro! a!bient air into the drillpipe or "ell




Considerations

Primar, Categor,


Delay in drilling "ell (lost ti!e and cost)

Air Drilling 7 ater influ: ,ole cleaning proble!s% delay in + is encountered operation. 're!ature RCD ele!ent "ear. rong size RCD stripper ele!ents on Drill pipe and3or tool location. 6oint size different than + Delay in drilling "ell (lost ti!e and planned cost). RCD fails !otor to pressure test. Freuent failures or poor

;. 'lanning

;. 'lanning

e l $ a ! i l p p A

perfor!ance increases nu!ber of trips reuired along "ith the + associated riss. ait on 'D&s suitable f or #$D3&'D en4iron!ent K te!perature and fluid co!patibility. ait on blaned du!p subs and3or + trip out of hole. + Release of to:ic gas near separator 'lugged $,A + Drill string "ashouts. ,igher and3or unstable $,'. Tight hole or stuc pipe. + 'lugged choe3separator du!p 4al4es. Da!age to bit and3or $,A. 1n4iron!entally responsible disposal + of , - conta!inated cuttings 2 1:ceed separator throughput capacity. + Release of burning oil3condensate fro! flare tip. 1:plosi4e !i:tures. Fire and e:plosion. + Da!age to do"nhole euip!ent and3or "ell casing.

=

;

=

;

=

;

Raise rig sub height by building up lease around casing bo"l. Eerify and chec eualizing line clearance if built too high. Change $' euip!ent. #se different rig. #se different RCD. Add pony sub under rig. RCD supplier to go to location to chec out rigHs sub prior to 6ob. Accurate $' stac7up and rig substructure clearance !easure!ents 1nsure adeuate co!!unications bet"een supplier and operator. Confir! ti!ing at pre7spud. perational plan should include contingency for s"itching to !ist% foa! and !ud operations. Drill string inspection. Eerify drill string size.

=

2

RCD supplier -'s3ris register. Drill string diagra!.

=

2

=

2

=

2

=

2

=

2

=

=

1nsure 'D& supplier is a"are of do"nhole operating en4iron!ent for application. nspect data for 'D&s recei4ed 4s. order placed. &otor supplier should be in4ol4ed in planning stage to ensure that the proper !otor specification is being supplied. For!al Co!!unication !ethod 7 radios -uction side discipline -uction -creens Consider !agnet36un baset run to clean out casing e:it. &onitor torue3drag carefully throughout drilling and tripping through e:it. A1R Directi4e <0> Drilling aste &anage!ent (see """.aer.ca) perating Co!pany "aste !anage!ent policies

=

;

;

R' ;5 22.;.<.<

,igh ' "ell probability% build so!e HfatH into !odeling% calculations% and per!it applications. 1nsure "ell is ne4er placed on 4acuu!. Al"ays fill drill string "ith liuid or inert gas during tripping. Al"ays !aintain !onitorable positi4e pressure on "ellbore. Conslut R';5 Fire and 1:plosion ,azard &anage!ent

0B3;0320;

RCD -upplier

RCD

perating Co!pany

/3A

perating Co!pany

ell 'rogra!

perating Co!pany

Drill -tring

Directional Co!pany

'D&

Directional 'D& Co!pany perating 8ease &anage!ent Co!pany #$D3&'D -eparation -er4ice 'ro4ider perating Co!pany

ell 'rogra!

perating Co!pany

8ease &anage!ent

perating Co!pany

ell 'rogra!

#$D -er4ice 'ro4ider

ell Control

DRAFT


Operational Phase

Item



e l $ a ! i l p p A





Considerations

Primar, Categor,

A!tions to $e taken / B, "ho and "hen 1nsure hand signals are in place for i!portant co!!unications. 1stablish radio protocol in safety !eeting. -upply sufficient head sets for !en "oring in high7 noise en4iron!ents. 1stablish battery changing schedule.

perating Co!pany 3 8ease &anage!ent #$D3&'D -er4ice 'ro4ider

Co!pany !an to coordinate hoisting acti4ities "ith picer operator and super4isors. 're7fab $' co!ponents can be difficult to install in lo" clearance areas. -afety hand to be i n4ol4ed during rig up. -potting #'D3&'D euip!ent.

'icer perator 3 #$D3&'D 8ease &anage!ent -er4ice 'ro4ider

2. Rig #p 3 'ressure Test 3 Co!!issioning

9

$T,

8oss of radio co!!unication

,ar! to personnel due to erroneous + co!!unications. 8ost ti!e and cost.

;

;

22.=.2.2


0

$T,

8ifting hazards

,ar! to personnel and3 or da!age to + euip!ent. 8ost ti!e and cost.

;

;

22.=.<


;

$T,

nadeuate or non7 e:istent "or platfor!s3barriers (i.e. RCD "or platfor!)

Trip and fall hazards particularly + around RCD installation3re!o4al and seal ele!ent change out.

;

;

nstall suitable "or decs and barriers for any ele4ated "or tass% particularly RCD installations. Adeuate co!!unication

perating Co!pany 3 RCD #$D3&'D -er4ice 'ro4ider


2

$T,

A!bient te!peratures belo" freezing

'ossible freezing in piping dead legs% + liuid traps% etc. "ith resultant blocage.

;

;

Consider heat tracing and3or "ar! air3/ 2 circulation to !aintain clear lines. A4oid liuid traps in installation% utilize *clear line* start up procedure.



=

$T,

nadeuate or non7 e:istent electrical grounding of euip!ent sids

!properly or non7grounded + euip!ent sids leading to personnel in6ury and euip!ent do"nti!e.

;

;

!ple!ent an electrical grounding plan for the installation. nspect and test installation for electrical grounding.

All

All


B

$T,

nadeuate or non7 e:istent electrical locout3tagout procedures.

'ersonnel in6ury% euip!ent da!age + "hen pre!aturely po"ering up electrical circuits.

;

;

!ple!ent electrical locout3tagout procedures.

All

All


<

$T,

nadeuate or non7 e:istent locout3tagout procedures for utility supply (i.e. instru!ent air)

'ersonnel in6ury% euip!ent failure% en4iron!ental spills as a + conseuence of inad4ertent re!o4al of sidded euip!ent utility supply (i.e. instru!ent air).

;

;

!ple!ent locout3tagout procedures for te!porary sidded euip!ent utility supply.

All

All




$T,

/o high7pressure "arning signs on pipe"or

+ ncreased ris to personnel.

;

2

Re4ie" in safety !eetings. nspect prior to pressure testing. nspect te!porary pipe "or.





$T,

RCD fails to pressure test

+ 8ost ti!e and cost.

2

;

1nsure adeuate spares on location. Eisually chec rig annular (ring gasets3stud threads) prior to rig up. 1nsure proper rig align!ent.

RCD -upplier

RCD


5

$T,

$' ele!ents fail to pressure test


2

;

Rig Contractor

$' -yste!


9

$T,

'ri!ary flo" line fro! stac to separation euip!ent fails to pressure test


2

;

5 of 2

$' should be tested and ser4iced as per A1R Directi4es prior to 6ob. Rig should stoc spare co!ponents as appropriate. -er4ice co!pany !ust be able to de!onstrate &TR% certification for pipe"or. -upplier to pro4ide -' for rig up and pressure test. Rig !atting to be s upplied in !uddy3soft ground conditions to enable proper !aeup3align!ent of pipe"or.

0B3;0320;


DRAFT


Operational Phase


Item

50



$T,


e l $ a ! i l p p A

+



-urface euip!ent !ay not be suitable in ter!s of pressure rating3flo" rate capability 7 "ait on + euip!ent. Fluid syste! !ay not be capable of achie4ing reuired pressure profile. 'ossibly pressurize !ud pu!p syste! through nitrogen in6ection line + (suction line !ay fail). as loc !ud pu!p.

5;

$T,

ell para!eters different fro! progra! 7 'R1--#R1


52

#$D

Failure to install chec 4al4e on each in6ection line


5=

$T,

ell para!eters different fro! progra! 7 ,2-

-urface euip!ent !ay not be suitable for handling sour fluid. + Additional concerns "ith regards to ,-1 for safe operations% fluid transportation% etc.


5B

$T,

'oor "eather

+



225

$T,

Fueling 1uip!ent

+ ,ar! to personnel and euip!ent.


5<

$T,

'oor ground conditions

+

5

#$D

Primar, Categor,

ce% !ud% une4en terrain can increase potential for slips% trips and falls.

2

;

2

;

2

;

2

;

2

2

nsite orientation and training. -uper4isors to ensure that all personnel ha4e been trained in the 4arious co!ponents of the rig up operation. dentify tass in tool bo: safety !eetings. 1nsure all "orers understand their right to refuse unsafe "or% or reuest training3guidance for tass that they are not yet co!petent in. Consider 1&- onsite during rig up operations. dentify ine:perienced cre"3short ter! cre" "ith green hand or green hard hats. ffsets to be analyzed as a guide for planning the operation. Assu!e "orst7case scenario "hen planning the "ell. Consider flush7production scenario encountered in #$D operations.

All

8ease &anage!ent

perating Co!pany 3 ell 'rogra! #$D3&'D -er4ice 'ro4ider

Discuss reuire!ents in pre7spud. Chec 4al4e to be installed do"nstrea! of all pu!ping euip!ent in operations using a ser4ice gas.

perating Co!pany 3 #$D Co!pression -er4ice 'ro4ider

ffsets to be analyzed as a guide for planning the operation. Assu!e "orst7case scenario "hen planning the "ell. 'lan for sour operations if there is e4en a s!all potential of encountering sour gas.

perating Co!pany

ell 'rogra!

-uper4isors ha4e obligation to stop unsafe "or3acti4ities.

perating Co!pany

8ease &anage!ent

2

2

1nsuring adeuate fuel gage and grounding. Re4ie" -'s.

Rig Contractor 3 #$D3&'D All -er4ice 'ro4ider

2

2

Consider e:tensi4e use of rig !atting. -a"dust% etc. to be a4ailable to i!pro4e footing on sno"3ice in "inter operations.

perating Co!pany

8ease &anage!ent

Co!pression -upplier

Co!pression

/RE

Co!pression or / 2 unit fails to start


=

;

Co!!ission in yard test if unit has been idle for a significant length of ti!e. -er4ice co!pany to sho" !aintenance records. nspect fuel tans before filling "ith diesel onsite.

Failure to pressure test increases + lielihood of a leaing /RE occurring.

=

;

'aper"or "ith /REs to include docu!entation of shop pressure test. Consider onsite pressure testing apparatus. ,a4e contingency procedures. ,a4e spare(s) /RE a4ailable.

/RE -upplier

+

=

;

Adeuate fuel filtering syste! to be in place for all critical co!ponents. nspect rental fuel storage tans before fi lling (especially B00 bbl tans not nor!ally used for fuel storage).

perating Co!pany 3 Co!pression #$D3&'D -er4ice 'ro4ider


5

$T,

/REs fail to pressure test or no docu!entation of pressure test


55

$T,

'oor uality diesel fuel on location

9 of 2


Considerations A!tions to $e taken / B, "ho and "hen





1uip!ent da!age% and lost ti!e. 'u!p3co!pressor failure during #$D3&'D operations !ay result in "ell control issues.

0B3;0320;

DRAFT


Operational Phase

Item



e l $ a ! i l p p A





Considerations

Primar, Categor,


=. Drill ut and ,ole Conditioning

59

$T,

Rig cre"s unfa!iliar "ith process

,ar! to personnel% euip!ent or + en4iron!ent. 8ost ti!e and cost.

;

;

22.;.<


90

$T,

Eal4es incorrectly positioned on stac or !anifold

+

'ossible o4erpressure of RCD or !anifold at surface. 'ossible fluid release to at!osphere3en4iron!ent.

;

;

22.;.< 22.=.B


9;

$T,

-eparator not purged prior to lighting flare

+

'otential bacflash3e:plosion in separation euip!ent.

;

;

22.;.=.

4erpressure at surface% dead7 + heading pu!ps and other ,-1 concerns.

;

2

Detailed #$D3&'D progra! in place. ritten procedures for critical operations a4ailable on rig floor. Re4ie" procedures "ith all personnel in a safety !eeting before drillout. Consider dry run for critical procedures prior to drilling out. 'rocess flo" diagra! posted in dog house. al the pu!p lines before co!!encing drillout procedure. Consider labeling all 4al4es and !aring the! as nor!ally open or nor!ally closed. All "ell control piping to be blo"n dry and3or heated to pre4ent freezing. 'urge "ith nitrogen prior to lighting flare. 1nsure bacpressure syste! is operable on pressurized separator before lighting flare. 1nsure hand signals are in place for i!portant co!!unications. 1stablish radio protocol in safety !eeting. -upply sufficient head sets for !en "oring in high7 noise en4iron!ents. Re4ie" roles in safety !eeting. Test in6ection pu!ps during rig up and co!!issioning. -tore che!icals as per !anufacturers reco!!endations. Consider#$D connecting in6ection pu!ps to data syste!. Detailed progra! in place% including pu!p

perating Co!pany 3 Training #$D3&'D -er4ice 'ro4ider


#$D3&'D Flare3Eent -yste! -er4ice 'ro4ider


92

$T,

'oor co!!unications during "ell conditioning


9=

$T,

Che!ical in6ection pu!ps are not "oring or not calibrated.

Riss of carryo4er fro! separator + (en4iron!ental concern). Corrosion concerns.

2

2


9B

#$D

'oorly designed hole conditioning procedure

1:cessi4e slugging and3or surface + pressure and flo" rates. 'ossible fluid carryo4er.

2

2


9<

$T,

Data syste! not functioning properly

+

nability to react in real7ti!e to "ell conditioning e4ents. 'ossible errors in i! ple!enting hole conditioning pu!p schedule.

2

2


9

$T,

For!ation integrity test insufficient for planned operations

#nable to apply #$D3 &'D progra!. + 'ossible "ell control concerns% lost ti!e or har! to personnel.

2

2

&ay reuire additional casing string or redesign of &'D3#$D operation. Re!edial ce!ent 6ob3re7drill and test.

perating Co!pany

ell 'rogra!

=

2

Drill out "hile pu!ping at high rate. Consider tooth bit 4ersus 'DC. &onitor torue and drag "hile drilling shoe. bser4e returns at s haer. Direct returns to shaer% bypassing separator. Control drill through plug. Consider drilling out "ith slic asse!bly.

perating Co!pany

Drill -tring

22.=.2.2

schedule. ritten procedure in doghouse3#$D control unit. 'rocedure re4ie"ed by engineering and discussed in safety !eeting. Test sensors and data syste! during c o!!issioning phase and confir! operation prior to drillout. 1nsure sensors are heat traced so that they donHt freeze and pro4ide erroneous data.

perating Co!pany

8ease &anage!ent

#$D3&'D &ud -yste! -er4ice 'ro4ider perating Co!pany

ell 'rogra!

#$D3&'D Data Acuisition -er4ice 'ro4ider


9

$T,

Float shoe debris in "ell after drillout

,igher $,' than predicted. #nstable $,'. + -tuc pipe. 'lugged choe. Da!age to $,A3bit.


22B

&'D

n Casing Test

+ Da!age to euip!ent.

=

=

$it to casing c learance. Follo" detailed -'s. 1nsure ho!ogeneous !ud in hole.

&'D -er4ice 'ro4ider

ell 'rogra!


95

$T,

Da!age to $,A during drillout

'otential har! to personnel if $,A floats fail. + 8ost ti!e and cost due to round trip. Co!pro!ised $,A integrity !ay result in a "ell control scenario.

=

2

Displace to gasified3drilling fluid syste! in controlled !anner after drillout. 1nsure all in6ection rate !eters are functioning and the reuired rate is being pu!ped. bser4e pressures during hole conditioning.

Directional Co!pany

&D

;0 of 2

0B3;0320;

DRAFT


Operational Phase

Item



e l $ a ! i l p p A


99

#$D

/RE not installed near surface prior to conditioning "ith co!pressible fluid

B. Drilling

;00

$T,

/o strategy for *planned* shut do"ns

+

B. Drilling

;0;

$T,

/o strategy for *unplanned* shut do"ns

B. Drilling

;02

$T,

$T,

B. Drilling

B. Drilling

B. Drilling

;; of 2

;0=

;0B

;0<





Considerations

Primar, Categor,


1:cessi4e bleed7off ti!e3connection ti!e. + 'ossibly reuire re7conditioning hole after long bleed7off ti!e to install /RE.

Reference and re4ie" drill string diagra!. Discuss in safety !eeting and confir! installation 4isually before co!!encing operations. Add drill string floats.

perating Co!pany 3 #$D /RE -er4ice 'ro4ider

=

2

Failure to consider t he shutdo"n seuence !ay result in hole proble!s% high pressures at surface% unnecessary "ell ill% etc.

;

;

22.=.9

Add c onti ngency plans.

perating Co!pany 3  ell 'rogra! #$D3&'D -er4ice 'ro4ider

+

Failure to consider t he shutdo"n seuence !ay result in hole proble!s% high pressures at surface% unnecessary "ell ill% etc.

;

;

22.=.9

Add c onti ngency plans.

perating Co!pany 3  ell 'rogra! #$D3&'D -er4ice 'ro4ider

-eparator fails

+

as release and har! to personnel3en4iron!ent.

;

;

22.;.=.< 22.2.B.<

-eparation euip!ent certification !ust be current. '-Es installed and relief lines rigged up. RigHs "ell control euip!ent rigged in and operational in case of catastrophic failure.


Dead legs3liuid traps on per!anently piped sid euip!ent 7 increased incidence of internal corrosion% lea and3or rupture

-idded euip!ent "ith per!anent piping installations often incorporate pipe dead legs or liuid traps (i.e. concentric reducers instead of eccentric reducers) "here acidic or + corrosi4e liuids accu!ulate and are not easily flushed. 'ossible lea or rupture "ith resultant personnel% euip!ent and en4iron!ental conseuences.

;

;

Consider inspection of sidded euip!ent per!anent piping for dead legs and liuid traps and re!o4e or pro4ide !eans of inspection and docu!entation.


Consider onsite #ltrasonic Thicness (#T) !onitoring progra!. &a:i!ize separator pressure to !ini!ize 4elocity in fl o" line. -er4ice co!pany to pro4ide erosion !anage!ent docu!ent. perate "ithin Flo" Control &atri: para!eters. Train on critical operations such as shutting in or di4erting to secondary flo" line. &aintain flo" 4elocities in pri!ary flo"line belo" (<< !3sec) in absence of detailed erosion !odeling. Reduce nu!ber of flo"line turns. 1nsure ;0 internal dia!eters spacing bet"een flo"line turns. This allo"s the flo" to straighten prior to the ne:t turn. 'ri!ary flo"line !ust contain targeted tees (turns) and be a !ini!u! ;0;. !! in outside dia!eter or larger. &a:i!ize liuid in6ection rate.

#$D3&'D ell 'rogra! -er4ice 'ro4ider

!ple!ent pipe inspection procedures and docu!entation prior to each rig up% and /DT "all thicness inspections at 4ulnerable points throughout operation. #T testing "hen possible.


$T,

ashout occurs on pri!ary flo"line fro! $' stac to the separation euip!ent

as release on location. + 'ersonnel in6ury. Da!age to euip!ent.

;

;

22.=.9

$T,

'ipe "all thicness erosion

4er ti!e pipe "all erodes or corrodes leading to reduction in pressure integrity% possible lea or + rupture "ith resultant personnel% euip!ent and en4iron!ental conseuences.

;

;

22.2.2.B 22.2.2.;

0B3;0320;

DRAFT


Operational Phase

Item



e l $ a ! i l p p A




;0

$T,

RCD drill string sealing ele!ent failure or RCD Control #nit Failure

as3,ydrocarbon fluid release at rig floor. + gnition and e:plosion ris. 'ossible for!ation da!age if "ell has to be illed.

;

;

B. Drilling

22<

&'D

Degasser fails3o4erflo"s

+ ,ar! to en4iron!ent.

2

2

B. Drilling

22

&'D

#se of secondary flo" line (rig bleed7off line)

+

8oss of "ell control. ,ar! to euip!ent and personnel.

;

;

B. Drilling

22

$T,

nadeuate3i!proper RCD size

,ar! to personnel or en4iron!ent. + Da!age to euip!ent. 'ossible loss of "ell control.

;

;

B. Drilling

;0

$T,

/o procedures in place for replacing RCD ele!ent

!properly atte!pting to change the RCD ele!ent !ay result in fires% + e:plosions or other catastrophic ,-1 e4ents. ,ar! to personnel.

;

;

B. Drilling

;05

$T,

RCD ele!ent deteriorates

+

Choe plugging% euip!ent da!age. Co!pro!ise of "ell control barrier.

;

;

B. Drilling

;2 of 2

;09

;;0

$T,

#$D

Drill string failure ("ashout or t"ist7off)

Gelly hose failure

Primar, Categor,


B. Drilling

B. Drilling


Considerations

'ossible gas3hydrocarbon fluid at rig floor. + gnition and e:plosion ris. For!ation da!age due to "ell ill. 'ossible pipe light situation.

as3fluid release at rig fl oor. ,ar! to personnel. + gnition and e:plosion riss. For!ation da!age if "ell has to be illed.

;

;

;

;

22.2.2.= 22.2..= 22.=.

Chec rig align!ent before and during operation. &onitor RCD perfor!ance "hile drilling. Replace ele!ents as per supplierHs -'s before !a6or leaage occurs. ,a4e a bacup ele!ent ready for uic installation. Consider installing a ne" ele!ent during lo" ris t i!es (out of hole% prior to starting drilling after a trip% etc.). Co!plete regular inspection of the control unit and its operability. ndication of failure is to be considered a "ell control e4ent. Consider a redundant bac7up unit onsite. 1nsure degasser fluid le4el3capacity. perate "ithin "ell progra! specifications. perate "ithin euip!ent specifications.

RCD -upplier

RCD


-eparation

perate "ithin "ell scope. 1nsure adeuate drilling fluid "eight and surface bac pressure (-$'). 1nsure adeuate ill !ud on location.


ell 'rogra!

Re4ie" offset data for area. Follo" driling progra!. 'lan for !a:i!u! pressures e:pected. 1nsure contingency plans are in place.

All

RCD

22.2.2.= 22.=.

Reference supplierHs -'s for changing the RCD ele!ent. Rehearse eualizing procedure prior to conducting operations. $ac pressure reuired during process.

RCD -upplier

RCD

22.2.2.= 22.=.

Reference supplierHs -'s for the use and !aintenance of the RCD. ,a4e bearing3rubbers a4ailable.

RCD -upplier

RCD

22.=.9 22.=.;;

1stablish !a:i!u! torue li!it on pipe during drilling operations. nspect all drill string co!ponents according to the appropriate ris assessed A' or D-7; category. &onitor drilling data for signs of pipe "ashout. nclude drill string failure in planned3unplanned shut7 do"n procedures.

Rig Contractor

ell 'rogra!

22.2..B 22.=.9

Consider installing ne" elly hose prior to c o!!encing #$D operations. Gelly hose to be certified for hydrocarbon liuid ser4ice "hen using $&. Run surface drill pipe screens periodically and chec for rubber debris. 'ressure test elly hose prior to starting operations. Consider using a hose certified for gas ser4ice in high ris operations (natural gas in6ection% etc.). Gelly hose issues also apply to other fle:ible rubber co!ponents in the rigHs !ud circulation syste!.

Rig Contractor

Rig 1uip!ent

0B3;0320;

DRAFT


Operational Phase

Item



e l $ a ! i l p p A





Considerations

Primar, Categor,


B. Drilling

;;;

$T,

Circulating through fle:ible hoses3shoc hose

Failure of hoses results in release of + hydrocarbons% potential in6ury to personnel.

;

;

22.2.2.;

,oses to be certified for hydrocarbon liuid ser4ice "hen using $&. 'ressure test hoses prior to starting operations. #se a hose certified for gas ser4ice in high ris operations (natural gas in6ection% etc.). #se hard line "hene4er possible.

B. Drilling

;;2

$T,

ell has to be illed for "ell control

For!ation da!age. + gnition and e:plosion riss. 'otential har! to personnel.

;

;

22.;.=.2 22.;.=.<

Gill fluid !ust be a4ailable on site% as per regulatory reuire!ents. Flo" control !atri: in place% and obser4ed. ell control procedure in place and rehearsed.

perating Co!pany

$T,

'oor understanding of the relationship of the #$D3&'D it and the rig it "ith regards to "ell control e4ents

Failure in "ell control procedure !ay + result in "ell control proble!s% loss of control% in6ury or death.

;

;

22.;.<

n7site orientation and training is to include "ell control considerations. Discuss at pre76ob safety !eeting.

RCD -upplier 3 #$D3&'D ell Control -er4ice 'ro4ider

$,A /RE failure

'ossible gas3reser4oir fluid co!!unication to surface. &ay reuire "ell ill to trip safely. + #nable to trip "ith re!edying the situation ("ell ill% set a plug% or retrie4e3replace /RE).

22.2.=.; 22.=.;0

Test /REs before initial installation. Replace $,A /REs after e4ery trip. nclude contingency to set a plug or another retrie4able /RE as deep as possible. nstall screens abo4e /RE to catch debris fro! the drill string. Run a !ini!u! of t"o /REs in the $,A.

perating Co!pany

&D Contractor 3 #$D3&'D &D -er4ice 'ro4ider

B. Drilling

B. Drilling

;;=

;;B

$T,

B. Drilling

;;<

$T,

'D Failure3&D Annular 'ressure fails

perational para!eters often consider a4ailability of real ti!e 'D data. Absence of 'D data !ay result in + poor decision !aing regarding "ell control. 'ossible trip out of the hole (cost). #ncertainty regarding do"n hole pressure.

B. Drilling

;;

$T,

naccurate flo" si!ulation

+

'otential to operate outside of fl o" control !atri: due to "rong input data.

;

;

Rig Contractor

Rig 1uip!ent

ell Control

/RE

2

;

Re4ie" reuire!ents for ' D data and i!portance "ith directional co!pany prior to starting operations. nclude decision points in progra! regarding 'D data failure. &aintain a "ell calibrated t"o phase flo" ! odel throughout operation. #se pressure data obtained fro! &'D soft"are. !ple!ent pu!ping progra! in accordance "ith &D tool -'s to !ini!ize potential for tool failure. #$D progra! should include potential decision points to trip% including "hether the operation can safely proceed "ithout 'D data.

2

2

Re4ie" fluid data and si!ulation soft"are use "ith #$D ser4ice pro4ider.

#$D3&'D ell Control -er4ice 'ro4ider perating Co!pany 3 &'D /RE -er4ice 'ro4ider

B. Drilling

;;

$T,

Rig cre" una"are of dangers of trapped pressure belo" /RE

'ossible da!age to euip!ent% in6ury% + or loss of life i f /RE is broen out "ith trapped pressure belo" it.

;

;

22.2.=.; 22.;.<.;

!proper use of /REs are a leading cause of ,-1 incidents in #$D3&'D operations. Re4ie" supplierHs -'s and i!ple!ent their use in accordance "ith the R' referenced.

B. Drilling

;;5

$T,

/o "ritten procedures in place for bleeding off the /RE

'ossible da!age to euip!ent% in6ury% + or loss of life i f /RE is broen out "ith trapped pressure belo" it.

;

;

22.2.=.;


perating Co!pany 3 &'D /RE -er4ice 'ro4ider

B. Drilling

;;9

$T,

nadeuate pressure rating for /RE bleed7off hose and tool

+

;

;

22.2.=.;


perating Co!pany 3 /RE /RE 'ro4ider

;= of 2

'ossible in6ury or loss of life if hose or tool fails.

0B3;0320;

DRAFT


Operational Phase

Item



e l $ a ! i l p p A





Considerations

Primar, Categor,


B. Drilling

;20

$T,

/RE bleed7off hose in poor condition

+

'ossible in6ury or loss of life if hose fails.

;

;

22.2.=.;


B. Drilling

;2;

$T,

/RE bleed7off hose is not securely anchored

+

,ose !ay "hip and in6ure3ill personnel on the rig floor.

;

;

22.2.=.;


perating Co!pany

/RE

$T,

Retrie4able /RE unseats under pressure

#nseated /RE can cause serious + da!age to euip!ent or in6ury3death.

22.2.=.;

!proper use of /REs are a leading cause of ,-1 incidents in #$D3&'D operations. Re4ie" supplierHs -'s and i!ple!ent their use in accordance "ith the R' referenced. Do not allo" unualified personnel to seat% inspect% or touch retrie4able /REs.

/RE -upplier

/RE

'ossible for!ation breado"n at + "ea point. ell control proble!s3blo"out.


B. Drilling

;22

;

;

22.=.;2

'otential for e:plosi4e !i:tures and3or fire (surface or do"nhole).

;

;

22.;.=. R' ;5

Job planning stage is to consider the air 4olu!e reuired to create a co!bustible3reacti4e !i:ture do"nhole based on the drilling fluids being used% reser4oir fluids% etc.

perating Co!pany

+

4erpressure of euip!ent% error in "ell control operations !ay result in euip!ent da!age or in6ury to personnel.

;

;

22.;.=.2 22.2.2.;

'LD to include electronic and !anual pressure !easure!ent points. Confir! reuire!ents at pre7spud and rig 4isit.


-econdary flo" line tied in to #$D !anifold

+

#nclear "ell control strategy% responsibility for operating 4al4es3choes !ay result in "ell control proble!s.

;

;

22.;.=.2 22.2.2.;

Consult 'rocess Flo" Diagra!s for appropriate reco!!endations.

#$D3&'D ell Control -er4ice 'ro4ider

!properly configured $' stac

ell control proble!s !ay not be + dealt "ith safely% resulting in possible loss of "ell control.

;

;

22.;.=.2 22.2.2.;

Consult 'rocess Flo" Diagra!s for appropriate reco!!endations.

perating Co!pany

ell Control

nsufficient ill fluid 3 ill fluid density on location

+ 8oss of "ell control.

;

;

22.2.<

Reference appropriate regulatory body regarding !ini!u! ill fluid 4olu!e reuire!ents. Gill fluid !ust be readily accessible.

perating Co!pany

ell Control

B. Drilling

;2=

$T,

B. Drilling

;2B

#$D

Air introduced into circulating syste! "hile !aing drill pipe connection3tripping

+

B. Drilling

;2<

$T,

nsufficient pressure !easure!ent points

B. Drilling

;2

#$D

B. Drilling

;2

#$D

B. Drilling

;25

$T,

;29

$T,

B. Drilling

;=0

#$D

B. Drilling

;B of 2

;=;

&'D

;

/RE

Job planning !ust include !a:i!u! allo"able surface pressure for the !ud "eight used for the operation. perational ad6ust!ents !ust be !ade based on the for!ation integrity test3leaoff gradient. Consider installing a pressure relief 4al4e upstrea! of the choe.

ell is accidentally shut in "hile pu!ping single phase (liuid)

B. Drilling

;

perating Co!pany

Flo" through tubing spool or casing bo"l

+

Dual annular is used for surface pressure contain!ent

'otential hydrocarbon release% + pressure at the rig floor% etc. if the stripping annular fails.

1:cessi4e bac pressure during single7 phase (liuid) &'D operations

ashout belo" $' !ay result in loss of "ell control.

'ossible for!ation breado"n at + "ea point. ell control proble!s3blo"out.

ell 'rogra!

;

;

22.2.2.;

/o flo" allo"ed through any 2* (or s!aller) flo". /o flo" through eualization lines.

perating Co!pany 3 ell Control #$D3&'D -er4ice 'ro4ider

;

;

22.;.=.2

-afety consideration are si!ilar to the use of RCDs. 1nsure that the design of the stac !eets reco!!ended practices.

RCD -upplier

RCD

22.=.;2

Job planning !ust include !a:i!u! allo"able surface pressure for the !ud "eight used for the operation. perational ad6ust!ents !ust be !ade based on the for!ation integrity test 3 leaoff gradient. Consider installing a pressure relief 4al4e upstrea! of the choe.


Choe3Flo"line

;

;

0B3;0320;

DRAFT


Operational Phase

Item



e l $ a ! i l p p A





Considerations

Primar, Categor,


B. Drilling

;=2

$T,

$lind ra! or pipe ra! failure.

+ 'otential loss of "ell control.

;

;

22.2.2.;

Flush $' stac prior to using co!ponents for operational purposes. Chec regulator pressure for ra!s and annular to ensure !a:i!u! closing pressures are obser4ed. &ini!ize cycling of $'s.

B. Drilling

;==

$T,

naccurate or insufficient 'ET !easure!ents

Failure to detect ics3losses (and + intensity) !ay result in "ell control incident.

;

;

22.;.=.2

'LD to include electronic and !anual pressure !easure!ent points. Confir! reuire!ents at pre7spud and rig 4isit. #se of !ass flo" !eters.


B. Drilling

;=B

$T,

Changing flash point of oil based drilling fluid

+

Flashpoint and fluid properties change "ith inflo".

;

;

22.=.;0

#se closed fluid storage syste! "hen drilling #$ "ith oil based syste!. &onitor fluid properties "hile drilling.

Rig Contractor

&ud -yste!

B. Drilling

;=<

$T,

nability to transfer fluid fro! storage tans to acti4e syste!

+

#nable to access fluid for "ell control purposes.

;

;

22.2.<

Confir! reuire!ents at pre7spud and rig 4isit.

perating Co!pany

ell Control

B. Drilling

;=

$T,

ellhead cellar full of liuid3!ud% i!!ersion hazard

+

'ossible i!!ersion hazard in the e4ent of a trip or fall.

;

2

22.=.=.;

'u!p out and barrier off cellar prior to RCD% etc. rig up.

perating Co!pany

8ease &anage!ent

,igh inflo" rates could e:ceed separator ratings (liuids or gas). ncreased potential for pipe erosion. + 'ossibly suspend operations before planned TD. 1:ceed RCD pressure rating.

;

2

22.;.=.;

-ize separator for flush production e4ents. Accurately !easure return flo" para!eters 7 rates and pressures. De4elop and post Flo" Control !atri: in dog house and #$D3&'D control roo!.


All

ell Control

B. Drilling

;=

$T,

,igh7rate flush production encountered

B. Drilling

;=5

$T,

1-D closes on the pri!ary flo" line fro! the $' stac to the separation euip!ent

4er pressure RCD% resulting in + failure and3or gas release at rig floor. 1:ceed for!ation strength at shoe.

;

2

22.2.2.2

The use and benefits of and 1-D need to be "eighed against the potential hazards of operating the 1-D (intentionally or accidentally). #$D3&'D progra! should 6ustify the use (or lac thereof) of an 1-D.


'ossible ad4erse effects on fluid syste!. 'ossible surface separation + challenges or storage proble!s. Fla!!ability3e:plosion ris in Air Drilling operations.

;

2

22.=.;0

&onitor fluid trends for signs of oil3condensate production. 'rogra! to include contingency plans if oil3condensate production is a possibility% including dealing "ith e!ulsions.


B. Drilling

;=9

$T,

#nplanned condensate3oil production

B. Drilling

;B0

$T,

#nclear responsibilities of ey personnel on location.

Delay in i!ple!enting "ell control + procedures !ay increase the potential for a se4ere "ell control incident.

;

2

22.=.2

A diagra! containing ey personnel roles% responsibilities% and reporting structure i!pro4es co!!unications and data disse!ination on location.


B. Drilling

;B;

$T,

#nclear reporting lines3structure on location

Delay in i!ple!enting ey decisions + !ay result in "ell control incidents% e:ceeding euip!ent ratings% etc.

;

2

22.=.2

A diagra! containing ey personnel roles% responsibilities% and reporting structure i!pro4es co!!unications and data disse!ination on location.


B. Drilling

;B2

$T,

Failure to bleed off float do"n to at!ospheric pressure

+

Any trapped pressure belo" the /RE poses a ris to personnel.

;

2

22.2.=.;



B. Drilling

;B=

$T,

$leed7off to at!osphere is located in an area "here "orers are present

+

orers are e:posed to flying debris% hazardous !ist.

;

2

22.2.=.;


#$D3&'D /RE -er4ice 'ro4ider

;< of 2

0B3;0320;

DRAFT


Operational Phase

B. Drilling

Item

;BB


$T,


Top dri4e seal and3or "ash pipe failure

e l $ a ! i l p p A





Considerations

Primar, Categor,


Release of gas3fluids at rig floor. + gnition3e:plosion ris. 'otential har! to personnel.

;

=

-er4ice and inspect before 6ob.

Rig Contractor

&D Contractor &D

#$D3&'D Flare3Eent -yste! -er4ice 'ro4ider

2

;

!ple!ent pu!ping progra! in accordance "ith &D tool -'s to !ini!ize potential for tool failure. Choose tools "ith a high &T$F in the de!anding #$D en4iron!ent.

2

2

Continuous pilot ignition syste!. ðane disperses rapidly into at!osphere. ,igh concentration of nitrogen !ay reduce flare ignition and co!bustion efficiency.

B. Drilling

;B<

$T,

&D tool failure

+ Trip out of the hole.

B. Drilling

;B

$T,

Flare pilot goes out

+

/onconfor!ance "ith regulatory reuire!ent to collect sa!ples. + 'otential har! to personnel% clearing plugged sa!ple catcher.

2

2

dours. 'otential e:plosi4e !i:ture. ptics for cre" of potential e:plosion ris.

22.=.;0

Consider dual sa!ple catcher !anifold syste!. &ust be able to isolate sa!ple catcher fro! pri!ary flo" line. -er4ice co!pany to pro4ide3follo" sa!ple catching procedure. Ad6ust sa!ple catching procedure based on 4olu!e of sa!ples caught each ti!e. Test in6ection pu!ps during rig up and co!!issioning. -tore che!icals as per !anufacturers reco!!endations. Consider connecting in6ection pu!ps to data syste!. -pear pu!ps3parts are to be a4ailable onsite. -"itch to second choe on dual7choe !anifold. nclude choe "ashout in the planned3unplanned shutdo"n operations. Follo" -'s. Follo" drilling progra!. -"itch to secondary choe. ,a4e adeuate !ud density on location. ,a4e contingency -'s.

Rig 1uip!ent

B. Drilling

;B

#$D

eological sa!pling syste! not "oring or plugged

B. Drilling

;B5

#$D

Che!ical in6ection pu!ps are not "oring or not calibrated

Riss of carryo4er fro! s eparator + (en4iron!ental concern). Corrosion concerns.

2

2

Te!porary loss of bac pressure control. + ,ar! to personnel or en4iorn!ent. Da!age to euip!ent. 'ossible loss of "ell control.

;

;

Flo"line erosion. + /oise (flaring). ,igher potential for euip!ent failure.

2

2

Follo" flo" control !atri: in progra!. 1nsure separator '-E capacity is appropriate for anticipated !a:i!u! possible gas flo" rate.

perating Co!pany

ell 'rogra!

perating Co!pany

ell 'rogra!

/RE

B. Drilling

;B9

$T,

,igh surface bac presure or #$D3&'D choe "ashout

B. Drilling

;<0

$T,

,igher than planned gas3oil inflo" rates

B. Drilling

;<;


-a!ple Catcher


&ud -yste!


$T,

Da!age to "ellhead sealing areas

CanHt set tubing hanger. + Tubing hanger "onHt seal. ellhead leas.

2

2

/RE leaing "hile !aing a connection. -light in6ection gas3fluid blo" fro! drill + pipe at surface. 8ost ti!e to trip and replace leaing /RE.

Consider installing "ear bushing during #$D operation. &ae sure rig align!ent is good throughout operation. solate "ell "ith pacer3bridge plug% then run hanger3pressure test and chec sealing areas.

2

2

Test /REs before initial installation. nstall screens abo4e /RE to catch debris fro! the drill string. Run "ireline retrie4able /REs.

perating Co!pany

B. Drilling

;<=

$T,

/ear -urface /RE failure

B. Drilling

;
$T,

Failure to continuously !onitor data strea! accuracy

+

'ossibly designing "ell procedures based on "rong infor!ation.

2

2

Data technician or other responsible person to !aintain data syste! and assure data i ntegrity. All decision !aers on location should ha4e access to the real ti!e data strea!.


B. Drilling

;<<

#$D

Che!icals are used in in6ection3return syste!

+

,ealth hazards of "orers e:posed to che!icals.

2

=

Appropriate protecti4e gear to be a4ailable based on &-D-3-D- sheets of all che!icals on location.

&ud Co!pany

&ud -yste!

perating Co!pany

ell 'rogra!

B. Drilling

; of 2

;<

$T,

1:cessi4e casing "ear

+ 8oss of "ell.

2

=

0B3;0320;

DRAFT


Operational Phase

B. Drilling

B. Drilling

Item

;<

;<5



e l $ a ! i l p p A

$T,

8eas in lo" pressure tan far! pipe"or

$T,

-pill during offloading3loading drilling fluid

+





Considerations

Primar, Categor,


1n4iron!ental spill% potential fire + hazard. 1n4iron!ental spill% potential fire hazard.

2

=

1stablish procedure to !onitor for leas. 'rocedures !ust be in place for shipping fluid% ensuring that no pipe"or is o4er7pressured.

RCD -upplier

-eparation

Re4ie" trucing contractorHs -'s. nspect condition of trucing contractors shipping lines. All e!ployees !ust go through the onsite orientation.

Trucing Contractor

&ud -yste!

2

=

'lanned hole depth not achie4ed. + Costs incurred "ith sidetracing. 'ossible stuc pipe% loss of $,A.

=

;

1nsure botto!s up calculation ti!es for sa!ple retrie4al is accurate. &onitor changes in R'3inflo"3changes in directional control% and other drilling para!eters to flag lithology changes. &onitor changing 8D data% if a4ailable.

Directional Co!pany

ell 'rogra!

=

;

Follo" #$D progra! procedures. &onitor trends on data syste! for signs of increasing $,'% decreasing inflo" rates% etc.

perating Co!pany

ell 'rogra!

'rocedure in place for unplanned and planned shutdo"n of gas in6ection syste!. Consider bac7up co!pression reuire!ents. Co!pression euip!ent supplier to pro4ide !aintenance schedule 3 onsite parts list. as in6ection !etering !ay reuire freuent calibration checs and consideration for redundant !eters.

Co!pression -upplier

Co!pression


ell 'rogra!

B. Drilling

;<9

$T,

Drill out of zone into shale or coal

B. Drilling

;0

$T,

4erbalanced pressure spie

+ 'ossible for!ation da!age.

=

;

=

;

B. Drilling

;;

#$D

as in6ection syste! fails

'ossible o4erbalanced situation + (for!ation da!age). 8ost ti!e and cost.

B. Drilling

;2

#$D

&ist pu!p failure

8ost ti!e and cost. ,igher $,' than planned. + #nstable $,'. -tuc pipe3poor hole cleaning. &D failure.

B. Drilling

;=

$T,

$orehole instability

+

For!ation da!age. -tuc pipe. 8ost $,A3fishing costs. Target not reached.

=

;

B. Drilling

;B

$T,

Torue and drag are too high

+

'lanned hole depth is not achie4ed. Drill string failure. 'ipe bucling. -tuc pipe.

=

2

B. Drilling

;<

$T,

#nstable flo" in annulus

+

Co!pro!ised hole cleaning could increase potential for stuc pipe. Difficult to interpret inflo" rates and "ell beha4ior.

=

2

Conduct freuent !ud or foa! checs. Change pu!p rates3surface bac pressure to change flo" regi!e in "ellbore.


B. Drilling

;

$T,

,ole cleaning proble!s

+

For!ation da!age. -tuc pipe. 8ost $,A3fishing costs. Target not reached.

=

2

Follo" &'D3#$D progra! for hole cleaning procedures and !onitoring. &onitor returns.


; of 2

'rocedure in place for unplanned and planned shutdo"n of gas in6ection syste!. Function test prior to starting operations. nstall screens in the suction line and ensure clean fluid is being pu!ped. &anage dra"do"n throughout all stages of the operations. nclude !ini!u! pressure to pre4ent breaout as a "ell design para!eter. A4oid e:iting into shale3coal sea!s% and a4oid planning a tra6ectory that crosses no"n trouble zones. &ini!ize ti!e in the hole "ithout circulating. Chec drill string specifications and recent inspections. !ple!ent good drilling practices 7 !ini!ize doglegs% !onitor hole cleaning para!eters% conduct "iper trips "hen reuired. nclude che!ical options for friction reducers in the planning stage of the "ell.

0B3;0320;


perating Co!pany

ell 'rogra!

DRAFT


Operational Phase

Item



e l $ a ! i l p p A




=

2

ncreased hole cleaning concerns. 'ossible euip!ent da!age due to increased drill string3"ell purge ti!e reuired.

=

2

bser4e &D supplierHs reco!!endation for !a:i!u! allo"able nitrogen in6ection rate. ncrease a"areness of possible hole cleaning proble!s.

+

8ost ti!e and cost. #nstable $,'. 'ossible for!ation da!age fro! pressure spies.

=

2

-ur4eying proble!s

+

8ost ti!e and cost. #nstable $,'. 'ossible for!ation da!age fro! pressure spies.

=

2

$T,

Drill string integrity failure

+

as release at rig floor. 'otential pipe light.

;

;

22.=.;;

;2

$T,

'ipe light

+

Drill string e6ected fro! "ell. Da!age to euip!ent and3or in6ury3death of personnel. 'ipe bucling.

;

;

22.=.

<. Tripping

;=

#$D

,igh flo" rate fro! "ell

+

ncreased RCD "ear% pipe"or erosion.

;

;

<. Tripping

;B

$T,

RCD failure 7 stripping through RCD

!!ediate release of gas3"ellbore + fluids to the rig floor. Ris of ignition% in6ury or death.

;


#nplanned for!ation "ater production

8o" inflo" rates

+

$T,

1:cessi4e drill string connection ti!e

;0

$T,

<. Tripping

;;

<. Tripping

;

$T,

B. Drilling

;5

#$D

B. Drilling

;9

B. Drilling

Connection procedures in place and rehearsed. $ac pressure schedule a4ailable and updated by onsite 1ngineer to opti!ize connection procedure to !ini!ize $,' spies. Connection procedure discussed "ith &D personnel before being finalized. Connection procedure !ust consider &D tool reuire!ents and li!itations. Consideration for 1&&D tools for "hen in6ecting t"o7 phase fluids into drill string. 'ositi4e pulse &D has li!itations "ith t"o7phase fluids abo4e 207=0I gas 4olu!e fraction in the standpipe. Test integrity prior to drillout. Test drill string integrity "hen breaing out last near7 surface /RE.

perating Co!pany

ell 'rogra!

perating Co!pany

ell 'rogra!

Rig Contractor

Training

&D Contractor &D

perating Co!pany

ell Control

'ipe light calculations to be updated based on current "ell para!eters. 'ipe light calculations need to be done befofe tripping out of the hole.

perating Co!pany

ell 'rogra!

22.;.=.; 22.;.=.< 22.2.2.B

Deter!ine decision points for "hen 4arious euip!ent is reuired% including push7pull euip!ent% and rig assisted snubbing units.

perating Co!pany

ell 'rogra!

;

22.2.2.= 22.;.=.<

perate RCD "ithin supplierHs specifications. nspect RCD ele!ent before tripping. Consider replacing RCD ele!ent "hen bit is bac at the shoe. Flo" "ell to reduce the fl o"ing "ell head pressure.

RCD -upplier

RCD

;

;

22.2.2.= 22.2.=.;

RCD -upplier

RCD

RCD -upplier

RCD

RCD -upplier

RCD

<. Tripping

;<

$T,

1ualizing procedure not i!ple!ented for changing RCD ele!ents

<. Tripping

;

$T,

RCD failure 7 "ith snubbing adaptor


;

;

22.=.

<. Tripping

;

$T,

RCD seal integrity is unno"n

Release of gas3"ellbore fluids to the + rig floor. Ris of ignition% in6ury or death.

;

;

22.2.2.= 22.=.

;5 of 2

Primar, Categor,

A!tions to $e taken / B, "ho and "hen &onitor fluid trends for signs of "ater production and !ae tra6ectory ad6ust!ents accordingly. #$D progra! to consider contingency "ith regards to pu!p rates reuired for hole c leaning (air77foa!7t"o7 phase transitions). Consider a contingency plan to deal "ith e!ulsions.

For!ation da!age to reser4oir section already drilled. + 'ossibly suspension of air drilling progra!. Fluid handling3storage3trucing issues.

B. Drilling


Considerations

perate RCD "ithin supplierHs specifications. Follo" procedure reco!!ended by RCD supplier "hen eualizing pressure. Re4ie" $' diagra! during prespud. Eent bleedoff to a safe area. perate3install snubbing adaptor as per supplierHs specifications. nspect3pressure test integrity of snubbing adaptor pressure seal on RCD before co!!encing snubbing operations. ear de4ice should *lea* rather than fail catastrophically.

0B3;0320;

DRAFT


Operational Phase

Item



e l $ a ! i l p p A





;

;

22.2.=.; 22.=.;0 22.=.

Release of in6ection gas at rig floor. 'ossible in6ury3death to personnel if bleed7off tool fails !echanically or hose co!es lose.

;

;

22.2.=.; 22.=.


/RE -upplier

/RE

Deeper pipe light point. ncreased RCD "ear3failure potential.

;

;

22.;.=.; 22.;.=.<

'ipe light calculations and associated euip!ent reuire!ents to be updated based on current "ell para!eters.

perating Co!pany

ell Control

-nubbing unit to be euipped "ith fail safe slip design to pre4ent pipe light condition. 're76ob inspection !ini!izes the potential for euip!ent do"nti!e. #nsupported pipe length bucling calculations shall be !ade.

-nubbing Contractor

ell 'rogra!

Rig Contractor

ell Control

<. Tripping

;5

$T,

$,A /RE failure

<. Tripping

;9

$T,

/RE $leed7off tool fails

+

<. Tripping

;50

$T,

Reser4oir pressure is higher than anticipated

+

<. Tripping

;5;

#$D

-nubbing unit failure


;

;

22.=.

<. Tripping

;52

$T,

Annular $' failure

'otential gas release to surface. + 'otential loss of "ell control euip!ent.

;

;

22.2.2.;

<. Tripping

;5=

$T,

;

2

22.=. 22.=.9

<. Tripping

;5B

$T,

;

2

22.=.;;

<. Tripping

;5<

$T,

Earying outer dia!eters in $,A

ncreased cross sectional area + increases snubbing force and associated riss.

;

2

22.2.2.= 22.=.

<. Tripping

;5

$T,

Failure to properly torue pipe connections "hile tripping

+

'ipe connection !ay co!e apart. 'otential loss of $,A3"ellbore.

2

<. Tripping

;5

#$D

8o" gas flo" rate fro! reser4oir (M0.2< &&scfd)

+

8o" pressure at surface reduces ris to personnel and the en4iron!ent.

<. Tripping

;55

$T,

Flo"ing te!perature changes

+

'ossibility for hydrates. 'otential euip!ent da!age% in6ury3death to personnel if hydrate breas loose.

<. Tripping

;59

#$D

nadeuate space to rig up snubbing euip!ent

For!ation da!age if the "ell has to be illed for trips. + 'ossible in6uries to personnel if trying to rig up euip!ent in e:tre!ely tight space.

;9 of 2

Primar, Categor,

Test /REs before initial installation. Replace $,A /REs after e4ery trip. nclude contingency to set a plug or another retrie4able /RE as deep as possible. nstall screens abo4e /RE to catch debris fro! the drill string. Run a !ini!u! of t"o /REs in the $,A.

'ossible gas3reser4oir fluid co!!unication to surface. &ay reuire "ell ill to trip safely. + #nable to trip "ith re!edying the situation ("ell ill% set a plug or retrie4e3replace /RE).

ashout in pri!ary flo"line ("hile -tripping) $ucling% yield% or collapse of drill string


Considerations

,igher surface pressure if "ell has to be shut in. Da!age to euip!ent. + n6ury to personnel. +

Consider the use of 4ariable pipe ra!s as bacup to the annular. Cannot change RCD ele!ent until Annular $' (and a second barrier) are both operational. 'rocedure in place (and rehearsed) to di4ert to secondary flo" line to fi: lea. Calculate bucling strength. Confir! calculations "ith !a:i!u! operating  ,'.


#$D3&'D Choe3Flo"line -er4ice 'ro4ider -nubbing ell 'rogra! Contractor

#se !a:i!u! dia!eter for pipe light calculations. perate pipe hea4y and pipe light slips. A4oid running 6ars and bu!per subs. f stripping through RCD ensure all $,A co!ponents are strippable.

-nubbing Contractor

ell 'rogra!

;

Eery unliely scenario. Follo" -'s for !aing up and breaing out connections "hile tripping.

-nubbing Contractor

ell 'rogra!

2

2

ell is to be c onsidered li4e despite lo" inflo" rate. RCD to re!ain engaged at all ti!es 7 "ell is ne4er to be open to at!osphere. &onitor "ellhead flo"ing pressure for changes throughout operation.

perating Co!pany

ell 'rogra!

2

2

ðanol and in6ection pu!p a4ailable on site. Calculations should be done in the "ell planning stage to define the te!perature3pressure "indo" under "hich hydrates !ay de4elop.


2

2

#$D progra! is to include the snubbing procedures and euip!ent to be used. -nubbing contractor should be in4ol4ed in pre7spud.

-nubbing Contractor

0B3;0320;

ell 'rogra!

DRAFT


Operational Phase

Item

e l $ a ! i l p p A



'ossible da!age to euip!ent. n6ury to personnel. + as3"ell bore fluids release to surface.

2

2

'rocedures to be re4ie"ed in a safety !eeting prior to co!!encing stripping3snubbing operations.

perating Co!pany

8ease &anage!ent

'otential da!age to euip!ent. ,azard to personnel.

2

2

Rig up in best location possible. Conduct J-A and hazard assess!ent prior to co!!encing operations.

-nubbing Contractor

ell 'rogra!





Considerations

Primar, Categor,


<. Tripping

;90

#$D

Failure in co!!unications during stripping3snubbing operations

<. Tripping

;9;

#$D

Driller has poor 4isibility of "or floor due to snubbing unit or push pull unit

+

<. Tripping

;92

#$D

Co!ple: $,As% tubular di!ensions and inability to stage tools

+ as release at rig floor.

2

2

$,A tools3dra"ings are reuired in the planning stages. nly strippable co!ponents% or co!ponents that can be . staged in the hole easily should be installed.

-nubbing Contractor

ell 'rogra!

<. Tripping

;9=

#$D

/ear -urface /RE failure

#ncertainty "ith regards to "hether + near surface% or $,A /REs are leaing !ay tae so!e ti!e.

=

=

$leed off string% inflo" test and continue tripping if $,A /RE integrity e:ists. nly $,A /REs are a !a6or concern "hen tripping.

perating Co!pany

/RE

8ubricator spacing for staging in3out odd sized drill3"or string co!ponents

/ot able to re!o4e drill string co!ponents. ncrease drill string integrity ris "ith connections belo" lo"er!ost /RE. + $it !ust be pulled closer to the di4erter ele!ent prior to closing the blind ra! during tripping. Cannot install pacers and3or co!pletion asse!blies in "ell.

2

Adding spacer spool bet"een RCD and annular pre4enter. Adding a pony sub under the rig. -u!ping casing bo"l. #sing s!aller $' dia!eter. #sing double gate ra!s. Connection of lo"er!ost $' to tubing head spool (no D-A).

Rig Contractor

ell Control

Rig Contractor

ell Control

RCD -upplier

RCD

<. Tripping

22;

#$D

<. Tripping

222

#$D

8oss of drill string integrity belo" the lo"er!ost /RE

8oss of "ell control. + Fire3e:plosion.

. ireline

;9B

$T,

RCD adaptor fails

+

. ireline

;9<

#$D

+

. ireline

;9

#$D

ireline lubricator leas3fails. rease in6ector head fails

;

22.2.=.;

!!ediate release of gas3"ellbore fluids to the rig floor. Ris of ignition% in6ury or death.

;

;

22.=. 22.=.9

as3"ellbore fluids release at surface. 'otential har! to personnel.

2

2

2

2

Run "ireline $'s.

2

2

Fishing operation !ay reuire the "ell to be illed. 8oss of "eight of tools !ay cause the "ireline to be e:pelled out of the hole (e4en "ith a grease in6ector rigged up). Consider 8D as an alternati4e.

ireline Contractor

Fishing

2

2

&anual gauge !ust be installed on the lubricator.


ireline Tools

=

-tandard cased7hole3open7hole euip!ent is not set up for operating at high surface pressures. Run grease in6ector.


ell 'rogra!

+ as release at surface.

;9

#$D

8ogging tools get stuc in the hole


. ireline

;95

#$D

/o pressure gauge on lubricator

+

. ireline

20 of 2

;99

#$D

nflo" test all connections belo" the lo"er!ost /RE prior to re!o4al fro! the "ell using annular pre4entor and RCD. Conduct !otor pu!p test prior to pulling !otor through RCD. &a:i!ize lubricator space to !ini!ize the nu!ber of connections belo" the lo"er!ost /RE that ha4e to be re!o4ed fro! the "ell prior to closing the blind ra!. Consider adding an /RE belo" the !otor and3or as close to the bit as possible. perate3install snubbing adaptor as per supplierHs specifications. nspect3pressure test integrity of snubbing adaptor pressure seal on RCD before co!!encing snubbing operations. 8o" probability of occurrence. 'ressure test "ith "ater or nitrogen before eualizing.

;

. ireline

#nable to run in hole due to pressure

2

'otential da!age to euip!ent% har! to personnel.

Delays (ti!e and cost). + as leas through pac7off.

2

0B3;0320;

ireline Contractor ireline Contractor

ireline Tools ireline Tools

DRAFT


Item


. ireline

200

$T,

. -uspend ell for Rig ut or Co!pletion

202

$T,


20=

$T,

'lug in tubing or tubing end plug fails


20B

#$D


20<


Operational Phase

Hazard !enario "hat I# 6 !proper RCD adapter on location 'ipe light condition occurs "hile running tubing

e l $ a ! i l p p A




A!tions to $e taken / B, "ho and "hen RCD -upplier

RCD

22.=. 22.=.9

-a!e controls as stripping3snubbing drill pipe out of the hole are reuired.

perating Co!pany

ell 'rogra!

;

22.=. 22.=.9

-tabbing 4al4e "ith crosso4er to tubing connection !ust be !ade up and ready for use on the rig f loor. Consider ha4ing profile sub "ith nipple as part of tubular string.

perating Co!pany

ell 'rogra!

;

2

22.=.5 22.=.9

A double barrier is reuired "hen rigging out the $' stac.

perating Co!pany

ell 'rogra!

;

2

22.=.5

&aintain the ability to flo" the "ell to the separation pacage until the "ell head is secured. Chec for leas continuously "hile unbolting $'s. Geep nuts on "ell head studs "hile first raising $'s.

perating Co!pany

ell 'rogra!

2

2

Retrie4e plug and set a ne" plug.

perating Co!pany

ell 'rogra!

,igh surface pressure could cause a pipe light condition. 'otential da!age to euip!ent% in6ury to personnel.

2

2

'ipe light calculations !ust be !ade prior to pressure testing if pipe is in the hole "hile testing.

perating Co!pany

ell 'rogra!

+

Ti!e and cost. 'otentially ha4e to ill the "ell.

2

2

perating Co!pany

ell 'rogra!

#nable to land dognut3tubing in "ellhead

+

Ti!e and cost. 'otentially ha4e to ill the "ell.

2

2

perating Co!pany

ell 'rogra!

#$D

8iuid re!ains in the hole prior to "ell suspension3co!pletion

+ For!ation da!age !ay result (cost).

=

=

Conduct adeuate blo"7do"n of "ell (dry gas scenario) in liuid sensiti4e for!ations.

perating Co!pany

ell 'rogra!

$T,

ellhead fails or is da!aged during rig out

'otential hydrocarbon release at + surface. ,ar! to personnel.

;

;

ell suspension plan to be in place and appro4ed by operator. Rig out plan to be re4ie"ed on site.

perating Co!pany

ell 'rogra!

$T,

8ifting hazards

,ar! to personnel. + 8ost ti!e and cost.

;

;

Co!pany !an to coordinate hoisting acti4ities "ith picer operator% and super4isors. 're7fab $' co!ponents can be difficult to install in lo" clearance areas. -afety hand to be in4ol4ed during rig up.

'icer perator

8ease &anage!ent

$T,

8oss of radio co!!unication

,ar! to personnel due to erroneous + co!!unications. 8ost ti!e and cost.

1nsure hand signals are in place for i!portant co!!unications. 1stablish radio protocol in safety ! eeting. -upply sufficient head sets for !en "oring in high7 noise en4iron!ents. 1stablish battery changing schedule.

perating Co!pany

8ease &anage!ent

;

;

;

+ !!ediate gas flo" to surface.

;

'otential for bridge plug to lea after pressure testing

'ressure at surface "hile rigging out + $' can ha4e catastrophic ,-1 results.

#$D

Dognut leas "hen $'s are being rigged out

+

20

#$D

Tubing or "ireline set bridge plug fails to pressure test

+ #nable to nipple up "ell head.


20

#$D

'ressure testing a plug "ith pipe in the hole

+


205

$T,

Tight hole or stuc pipe "hen running tubing


209

#$D


2;0

5. Rig ut

2;;

5. Rig ut

2; of 2

2;2

2;=

Primar, Categor,

Confir! reuire!ents for adaptor in pre7spud or "hen calling out the "ireline unit.

+ ait on euip!ent (ti!e and cost).

=

5. Rig ut


Considerations

+

Da!age to euip!ent. n6ury to personnel.

as flo" at surface "ithout "ell control. 'ossible loss of "ell% in6ury3death to personnel.

;

;

1nsure good hole cleaning on last trip out of the hole "ith drillpipe3bit. Conduct scraper run prior to running production pacers. Run "ear bushing "hile drilling to !ini!ize potential of da!aging the "ellhead. /ote that the "ear bushing !ay also create a proble! in that it !ay be difficult to re!o4e. ritten procedure reco!!ended for landing the dognut.

22.=.9

22.=.<

22.=.=.=

0B3;0320;

DRAFT


Operational Phase

Item

e l $ a ! i l p p A



,ar! to personnel. + 8ost ti!e and cost.

;

;




5. Rig ut

2;B

$T,

5. Rig ut

2;<

$T,


+


2

;

5. Rig ut

2;

$T,

nadeuate lighting

+

ncreased potential for ,-1 i ncidents such as slips% trips or falls.

2

2

5. Rig ut

2;

$T,

'oor ground conditions

+

ce% !ud% une4en terrain can increase potential for slips% trips and falls.

2

2

5. Rig ut

2;5

$T,

'oor "eather

+


2

2

!properly purged euip!ent

'otential e:plosi4e gas release "hile rigging out. + Eessel entry for clean up is not possible "ith e:plosi4e gas in 4essel.

22 of 2

2;9

$T,

Primar, Categor,


Concurrent rig up of rig and #$D3&'D pacage causes confusion

5. Rig ut


Considerations

2

=

22.=.B

nsite super4isors to for!ulate rig up plan. Co!pany !an to coordinate o4erall strategy. -afety hand to be in4ol4ed during rig up. nsite orientation and training. -uper4isors to ensure that all personnel ha4e been trained in the 4arious co!ponents of the rig up operation. dentify tass in tool bo: safety !eetings. 1nsure all "orers understand their right to refuse unsafe "or% or reuest training3guidance for tass that they are not yet co!petent in. Consider 1&- onsite during rig up operations. Conduct re4ie" of lighting reuire!ents "ith ser4ice co!panies at pre7spud. Consider constructing a lighting diagra!. Rent light to"ers as reuired. Consider e:tensi4e use of rig !atting. -a"dust% etc. to be a4ailable to i!pro4e footing on sno"3ice in "inter operations. -uper4isors ha4e obligation to stop unsafe "or3acti4ities. 'urge lines "ith inert gas or "ater prior to rigging out. Chec 818 prior to using ha!!er on ha!!er unions 7 use brass ha!!er. #se separator that can be cleaned "ithout entering. 1nsure flare is distinguished.

0B3;0320;

perating Co!pany

Training

All

Training

perating Co!pany

8ease &anage!ent

perating Co!pany

8ease &anage!ent

perating Co!pany

8ease &anage!ent


DRAFT

;. 'lanning 2. Rig #p 3 'ressure Test 3 Co!!issioning =. Drill ut and ,ole Conditioning B. Drilling <. Tripping . ireline . -uspend ell for Rig ut or Co!pletion 5. Rig ut 9. ther ,azards and perations

#$D &'D $oth

=rd 'arty Rental All Coil Tubing Contractor Co!pression -upplier Directional Co!pany &'D 1uip!ent 'ro4ider &'D -er4ice 'ro4ider &ud Co!pany &D Contractor &D Contractor 3 #$D3&'D -er4ice 'ro4ider /RE -upplier perating Co!pany perating Co!pany 3 &'D -er4ice 'ro4ider perating Co!pany 3 /RE 'ro4ider perating Co!pany 3 #$D -er4ice 'ro4ider perating Co!pany 3 #$D3&'D -er4ice 'ro4ider 'icer perator 'icer perator 3 #$D3&'D -er4ice 'ro4ider RCD -upplier RCD -upplier 3 #$D3&'D -er4ice 'ro4ider Rig Contractor Rig Contractor 3 #$D3&'D -er4ice 'ro4ider -afety -er4ices -nubbing Contractor Trucing Contractor #$D -er4ice 'ro4ider #$D3&'D -er4ice 'ro4ider ireline Contractor

All $' -yste! Choe3Flo"line Co!pression Data Acuisition Drill -tring Fishing Flare3Eent -yste! 8ease Reuire!ents 8ease &anage!ent &ud -yste! &D &'D3#$D 1uip!ent Rental /3A /RE 'D& RCD Rig 1uip!ent -a!ple Catcher -eparation Training ell Control ell 'rogra! ireline ireline Tools

+ /

Rig Risk Assessment

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