Mast and Dwks Lowering Checklist

Author : P. Kashirskiy / G. Gonsalves / I. Barkat Checked By: Sanjeev Kapoor Approved By: Smida

DWKS and Mast Lowering Checklist

Azzedine

REF: Drillmec Checklist

Page 1 of 4 Issued: April 2011

RIG- IDC 36,37,38

Version 1.0

Drawworks Lowering  Check fuel level in fuel tanks. Should be good enough to run engines.  Check VFD, Two Generators must be on line.  Check Drawworks clutch air pressure. Air Pressure should be above

100 Psi.  Check at least one Air compressor should be running with required air

pressure and other unit ready to start.  Check the functioning of hydraulic power unit (HPU) of Drawworks

braking system and its oil level.  Check the functioning of Drawworks braking system.  Make sure cooling water is running to circulating to HPU, DWKS and

Elamagco Brake.  Check Drawworks and Auxiliary brake Linkage is engaged (must be

Engaged).  Check proper greasing of all sheaves (A-Frame, Mast, Crown block;

Drawworks frame).Observe the pulleys while lowering mast, make sure pulley are rotating when lowering DWKS.  Check raising line properly wrapped in sheaves and line guards

properly inserted.  Check all drilling floor foldable/removable covers (drawworks side) have

been folded/removed, to avoid any interference during drawworks lowering.  Check Grasshopper properly fixed, free from any obstacles. One

person should keep eye on grasshopper cables while lowering DWKS.  Make sure all cables/ Hoses around /under DWKS are free from any

obstruction with any beam or Pipe.



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RIG- IDC 36,37,38

Version 1.0

 Check the functioning of Main HPU for Hydraulic Jack (Snubbing Unit)

to push the DWKS for lowering.  Make sure that the Pins on DWKS side of BOP Trolley beams are fully

IN from DWKS side to facing Mast side. These Pins may get stuck at the lowering point with cross H Beam if not fully In.  Ensure that the RT beams remain pinned to mast side. The pins on

DWKS side should be removed.  Removed the water inlet line, Elamagco side, as its get tension with

DWKS raising line.  Make sure remove 02 each diagonal H beams below DWKS (01 DS

and 01 ODS)  Check proper connection of dead line anchor’s load cell and weight

indicator.  One crane should be ready on Driller side and one crane should be

ready off driller side, in case of some problem.  Safety meeting.  Check the only presence of authorized personnel surrounding rig down

area.

  

DWKS LOWERING START: .................... DWKS LOWERING STOP: .................... MAX LOAD: ....................



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RIG- IDC 36,37,38

Version 1.0

Mast Lowering After Drawworks lowering, it’s required the execution of the following operations:  Make sure the raising lines has been changed from DWKS to Mast

Lowering Position (raising line properly wrapped in sheaves)  Make sure that front cover of DWKS has been removed. Drill Line will

touch with front cover, if not removed while lowering Mast.  Check proper installation of all pins and related sheave pins.  Check the functioning of Mast snubbing cylinders with main HPU.  Make sure the derrick board plat form is fold back and secured with

rope properly. If not, block will touch to the center working platform of Derrick man.  Check absence of any interference with pipes and electrical cables.  Make sure the TDS Loops are free hanging. If the end of loops left on

rig floor, it will fall down to the ground during lowering.  Make sure the TDS Torque tube (Monorail) hang off link is secured on

the crown block.  Make sure the main Tie back beam of TDS on main Spreader beam is

secured. If loose, will fall down during mast lowering.  Check proper installation of high Hose stand.  Check the presence of utilities around rig up area (one crane on Driller

side and 2nd crane off driller side should be available).

 Place one section of catwalk 5ft from setback level for Travelling Block

to set down on.



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RIG- IDC 36,37,38

Version 1.0

 Team of two operators, A/D & Derrick man in charge by Rig

Manager/Tool Pusher, must check all rig components (mast, crown block, racking board, casing stabbing board, belly board, rest platforms and caged ladders, tong counterweights, and all completions) to avoid the presence of: 

Un-tightened bolts;



Bolts, wrenches, cables and any objects not fixed that could fall during mast lowering.

 If any component nut/bolt/ spanners fell down from mast, during

lowering, the two persons inspected the mast will be responsible.  Make sure that both mast legs area is clear from underneath, when the

mast legs will be close to floor plates at lowering position.  Ensure to remove all air hoists from rig floor and make sure that the

base of air hoist on the driller side is removed. The mast leg will touch it if not removed.  Have winch truck (kenworth) standing by in case snubbing unit is

unable to push the mast.  Safety meeting.  Check the only presence of authorized personnel surrounding mast

lowering area.

  

MAST LOWERING START: .................... MAST LOWERING STOP: .................... MAX LOAD: ....................



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RIG- IDC 36,37,38

Version 1.0

The Rig manager shall choose suitable operators to follow this task: Driller: Name_____________

Signature_____________

Chief Electrician in charge to check the generators and set all electrical parts. Name_____________


Chief Mechanic in charge to control Mast’s snubbing cylinder. Name_____________


Verify that in the perimeter surroundings the raising area doesn’t have any obstacles for an emergency escapes.

Place: Date: Tool Pusher: Rig Manager:

_______________________________ _______________________________ _______________________________ _______________________________

Mast and Dwks Lowering Checklist

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