070204-FD-001.rev 2 - 31-01-2008 Boukje

ITHACA ENERGY (UK) Ltd. JACKY WHP WELLHEAD FACILITIES

FUNCTIONAL DESCRIPTION

JACKY WHP WELLHEAD FACILITIES

Prepared for:

ITHACA ENERGY (UK) Ltd HSM Steel Structures B.V.

DOCUMENT NO. 070204-FD-001

Prepared by: Iv-Oil & Gas B.V. Noordhoek 37 3351 LD Papendrecht The Netherlands

Re v

Date

Description

Prepared by

Checked by

Iv O&G Approved

0 1

14-11-

FOR TENDER UPDATED

M ST M ST

TDR TDR

WBA WBA

28-11-

ITHACA ENERGY (UK) Ltd. JACKY WHP WELLHEAD FACILITIES 2

26-012008

Updated for Contract

PDG

TDR

WBA

TABLE OF CONTENTS

1.0 INTRODUCTION...................................................................... ......................................... .............. ....... ......... 5 1.1. PROCESS DESCRIPTION..............................................................................................................6 1.1.1. Oil Production....................................... Production....................................... ......................................... .............................. ..... 6 1.1.2. Water injection (Future)...................................................................................................6 1.1.3. Vent system................................................................... ............................... .............. ....... ............. ...... 6 1.1.4. Drainage System .............................................................................................................7 1.1.5. Fire fighting ....................................... ........................................ ................................... .... 7 2.0 BASIC DATA ...................................... ........................................ ............................. ............. ...... .............. .......... ... 8 2.1. JACKY RESERVOIR DATA ...........................................................................................................8 2.1.1. Reservoir Reservoir parameters parameters for well 12/21-c-6........................................................... 12/21-c-6........................................................... .............. .......... .... 8 2.1.2. Fluid properties......................................... properties......................................... ........................................ ............. ............. ....... ........... ..... 8 2.1.3. Wax properties......................................... properties......................................... ......................................... ................................ 8 2.1.4. Contaminants..................................................................................................................10 2.1.5. Formation Water composition.......................................................................................10 2.2. DESIGN FLOWRATES..................................................................................................................11 2.3. INJECTION OF CHEMICALS........................................................................................................11 2.3.1 Production Fluid..............................................................................................................11 3.0 SYSTEM DESCRIPTION ..............................................................................................................13 3.1. WELL HEADS (3 OFF) BY OTHERS ...........................................................................................13 3.2. PRODUCTION LINE 4” ................................................................................................................14 3.3. PRODUCTION MANIFOLD 6”.......................................................................................................14 3.4. RISER CONNECTION 6”..............................................................................................................15 3.5. WATER INJECTION SYSTEM......................................................................................................15 3.6. CHEMICALS STORAGE STORAGE TANK JK-12-T-102/202/3 JK-12-T-102/202/302/402................................................ 02/402................................................ ........... ....... .... 16 3.7. CHEMICAL INJECTION PUMPS JK-12-P-101/201/301/40 JK-12-P-101/201/301/401/501 1/501 ............................. .................... 16 3.8. VENT SYSTEM.............................................................. ........................................ ............... ......... ............. ......... 17 3.8.1 Vent Cyclone JK-14-V-01................................................................................................17 3.9. DRAIN SYSTEMS.................................................................... ................................. ............. ....... ............. ....... 17 3.9.1 Liquid Collecting Vessel JK-16-V-101............................................................................17 3.9.2 Oil Slot JK-16-V-102........................................................................................................17 3.10. FIRE WATER DRY RING MAIN..................................................................................................18 3.11. J-TUBE UMBILICAL CABLE RISERS.........................................................................................18 4.0 STRUCTURAL ....................................... ......................................... ................................. ............. ....... ...... 19 5.0 PLOT PLAN & PIPING ..................................................................................................................20 6.0 ELECTRICAL SYSTEMS...............................................................................................................21 6.1. INTRODUCTION INTRODUCTION ...................................... ......................................... .............................. ............. ...... ....... 21 6.2. SCOPE.............................................................. ......................................... ......................... .......... ....... ... 21 6.2.1 COMPANY free issued equipment.................................................................................21 6.3. GENERAL DESIGN REQUIREMENTS ........................................................................................21 6.3.1 Codes, standards, standards, regulations and references....................................................... references....................................................... ...... 21 6.3.2 Environmental conditions..............................................................................................21 6.3.3 Area Classification..........................................................................................................22 6.4. FUNCTIONAL REQUIREMENTS .................................................................................................22 6.4.1 Operating requirements..................................................................................................22 6.4.2 Equipment enclosures....................................................................................................22 6.5. ELECTRICAL DESIGN PHILOSOPHY..........................................................................................22 6.5.1 General........................................................................ ....................................... ............. ...... ......... 22 6.5.2 Power distribution & equipment....................................................................................23 6.5.3 Battery Back-up requirements.......................................................................................23 6.5.4 Cabling & wiring..............................................................................................................23 6.5.5 Cable glands....................................................................................................................24

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ITHACA ENERGY (UK) Ltd. JACKY WHP WELLHEAD FACILITIES 2

26-012008

Updated for Contract

PDG

TDR

WBA

TABLE OF CONTENTS

1.0 INTRODUCTION...................................................................... ......................................... .............. ....... ......... 5 1.1. PROCESS DESCRIPTION..............................................................................................................6 1.1.1. Oil Production....................................... Production....................................... ......................................... .............................. ..... 6 1.1.2. Water injection (Future)...................................................................................................6 1.1.3. Vent system................................................................... ............................... .............. ....... ............. ...... 6 1.1.4. Drainage System .............................................................................................................7 1.1.5. Fire fighting ....................................... ........................................ ................................... .... 7 2.0 BASIC DATA ...................................... ........................................ ............................. ............. ...... .............. .......... ... 8 2.1. JACKY RESERVOIR DATA ...........................................................................................................8 2.1.1. Reservoir Reservoir parameters parameters for well 12/21-c-6........................................................... 12/21-c-6........................................................... .............. .......... .... 8 2.1.2. Fluid properties......................................... properties......................................... ........................................ ............. ............. ....... ........... ..... 8 2.1.3. Wax properties......................................... properties......................................... ......................................... ................................ 8 2.1.4. Contaminants..................................................................................................................10 2.1.5. Formation Water composition.......................................................................................10 2.2. DESIGN FLOWRATES..................................................................................................................11 2.3. INJECTION OF CHEMICALS........................................................................................................11 2.3.1 Production Fluid..............................................................................................................11 3.0 SYSTEM DESCRIPTION ..............................................................................................................13 3.1. WELL HEADS (3 OFF) BY OTHERS ...........................................................................................13 3.2. PRODUCTION LINE 4” ................................................................................................................14 3.3. PRODUCTION MANIFOLD 6”.......................................................................................................14 3.4. RISER CONNECTION 6”..............................................................................................................15 3.5. WATER INJECTION SYSTEM......................................................................................................15 3.6. CHEMICALS STORAGE STORAGE TANK JK-12-T-102/202/3 JK-12-T-102/202/302/402................................................ 02/402................................................ ........... ....... .... 16 3.7. CHEMICAL INJECTION PUMPS JK-12-P-101/201/301/40 JK-12-P-101/201/301/401/501 1/501 ............................. .................... 16 3.8. VENT SYSTEM.............................................................. ........................................ ............... ......... ............. ......... 17 3.8.1 Vent Cyclone JK-14-V-01................................................................................................17 3.9. DRAIN SYSTEMS.................................................................... ................................. ............. ....... ............. ....... 17 3.9.1 Liquid Collecting Vessel JK-16-V-101............................................................................17 3.9.2 Oil Slot JK-16-V-102........................................................................................................17 3.10. FIRE WATER DRY RING MAIN..................................................................................................18 3.11. J-TUBE UMBILICAL CABLE RISERS.........................................................................................18 4.0 STRUCTURAL ....................................... ......................................... ................................. ............. ....... ...... 19 5.0 PLOT PLAN & PIPING ..................................................................................................................20 6.0 ELECTRICAL SYSTEMS...............................................................................................................21 6.1. INTRODUCTION INTRODUCTION ...................................... ......................................... .............................. ............. ...... ....... 21 6.2. SCOPE.............................................................. ......................................... ......................... .......... ....... ... 21 6.2.1 COMPANY free issued equipment.................................................................................21 6.3. GENERAL DESIGN REQUIREMENTS ........................................................................................21 6.3.1 Codes, standards, standards, regulations and references....................................................... references....................................................... ...... 21 6.3.2 Environmental conditions..............................................................................................21 6.3.3 Area Classification..........................................................................................................22 6.4. FUNCTIONAL REQUIREMENTS .................................................................................................22 6.4.1 Operating requirements..................................................................................................22 6.4.2 Equipment enclosures....................................................................................................22 6.5. ELECTRICAL DESIGN PHILOSOPHY..........................................................................................22 6.5.1 General........................................................................ ....................................... ............. ...... ......... 22 6.5.2 Power distribution & equipment....................................................................................23 6.5.3 Battery Back-up requirements.......................................................................................23 6.5.4 Cabling & wiring..............................................................................................................23 6.5.5 Cable glands....................................................................................................................24

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ITHACA ENERGY (UK) Ltd. JACKY WHP WELLHEAD FACILITIES 6.5.6 Earthing and bonding.....................................................................................................24 6.6. LIGHTING DESIGN.......................................................................................................................25 6.6.1 General........................................................................ ....................................... ............. ...... ......... 25 6.6.2 Lighting Categories.........................................................................................................25 6.6.3 Luminaire types...............................................................................................................25 6.6.4 Levels of Illumination......................................................................................................25 6.6.5 Required Illumination Level............................................................................................26 6.6.6 Aircraft Warning Lights...................................................................................................26 6.6.7 Distribution and Control ................................................................................................26 6.7. SMALL POWER DESIGN..............................................................................................................26 6.7.1 Welding Socket Outlets .................................................................................................26 6.8. TRACE HEATING.........................................................................................................................27 6.8.1 Self-Regulating/Self-Limiting Heaters...........................................................................27 7.0 INSTRUMENTATION AND COMMUNICATION SYSTEMS .........................................................28 8.0 LIFE SAVING EQUIPMENT ..........................................................................................................30

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ATTACHMENTS

ATTACHMENT 1

STRUCTURAL -- Isometric Sketches Sketches Structural Structural Steel Topsides Topsides & Jacket

ATTAC ATTACHM HMENT ENT 2

Main Main Equipm Equipmen entt List List

ATTA ATTACH CHME MENT NT 3

P&ID P&ID Diag Diagra rams ms


Key One Line Line Diagra Diagram m 11 kV

ATTACHME ATTACHMENT NT 5

400V 400V AC Distribu Distribution tion MCC One Line Diagram Diagram


Lay-o Lay-out ut E&I rooms rooms


Electr Electrica icall Load Load List List


Layou Layoutt Drawin Drawings gs

ATTACHME ATTACHMENT NT 9

Instrume Instrumenta ntation tion Block Block Diagram Diagram

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1.0 INTRODUCTION ITHACA Energy (UK) Ltd has awarded a contract to HSM and Iv as contractors to undertake engineering and procurement services for the JACKY WHP Wellhead Facilities. This document descripes the facilities and there function as agreed under the contract. The function of this document is to provide a description of the facilities to be supplied under the contract between ITHACA Energy (UK) and HSM Steel Structures b.v. “’Due to the fact track”” schedule of the project a detailed HAZOP and HAZID were conducted at an early stage. The findings from both exercises are incoperated in this document. The wellhead facilities are 4 slots: One (1) slot for an oil producer, one (1) slot for a future producer, one(1) for a future water injection well, one(1) spare slot, one riser connected to an export pipeline and one spare riser for a Minimal Facilities Satellite Platform for the Jacky Field Development in Block 12/21C. This Well Head Platform (WHP) is located approximately 10.5 km north west of the Beatrice B platform in 40 m of water. Suitable jack-up rig interface points shall be provided for these jack-up rig types: Marathon le Tourneau 116-C CFEM 2005 Neddrill 4 (Nam Nedlloyd) Goriilla (Marathon Le Tourneau, 150-88-C) Friede & Goldman, Monarch class The Jacky WHP will be connected with the Beatrice Alpha platform by a 6”oil pipeline and umbiblical power and signalling cables. The Jacky WHP is designed as a Not Normally Manned Installation, which will be controlled and serviced from Beatrice Alpha. Beatrice Alpha also serves as host platform for the oil from Jacky WHP. Access to the platform will be from a fast rescues craft/crew boat via a boat landing. No helideck is provided. The Jacky facility is located in 39.380 m (LAT) and a desigh life of 10 years and will consist of a mono-tripod column 4500mm in diameter with 3 suction pile foundations . The topsides has a deck leg spacing of 10 x 13 meters and consist of four decks, Celler Deck @ EL.+17,000 TOS, Main Deck @ EL.+20,000, Wellhead Access Deck @ EL+24,000 and Top Deck @ EL +28,000. There is an Electrical & Instrument room located to the west of the platform between main deck and top deck. The following equipment will be procured by COMPANY and free issued to contractor who is responsible for its intergration into the design: -

Sub-sea power and control unbilical together with its hang-off and splitter box. Electric Submersible Pump (ESP), down well cable and junction box together with the ESP Variable Speed Drive unit.

Provision in the form of space in the swithchgear and plot space in the electrical rooms and process area will be provided for the future installation of seawater injection equipment and a varable speed drive for the future electric submersible pumr for the f uture well.

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1.1.

PROCESS DESCRIPTION The wellhead area shall be provided with space for four wells. Initially the WHP will be provided with a Christmas trees for one oil producing well. At a later stage the WHP will be provided with a wellhead for a water injection well and a third Christmas tree for a second oil producing well.

1.1.1.

Oil Production

The oil wells are provided with Electrical Submerged Pumps. The oil-water mixture is pumped to the Jacky WHP at a pressure above the bubble point. Each well is connected by a 4” production line to the 6” production manifold. This production manifold is provided with injection points f or these chemicals: -

Corrosion inhibitor Wax inhibitor Scale inhibitor

The production lines and the manifold including injection points will be made from duplex steel. Downstream the injections points’ carbon steel with a corrosion allowance of 5 mm will be applied up to the tie in to the sub sea oil export line. A corrosion monitoring device (coupon) is mounted in this CS pipe section. The riser is provided with a barred tee and a vertical pig receiver/launcher. Provisions are made for fitting a horizontal intelligent pig to monitor the pipeline condition. The produced liquid is exported to the Beatrice Alpha platform, where this Jacky WHP fluid will be processed and commingled with the existing Beatrice production and exported.

1.1.2.

Water injection (Future)

The reservoir pressure will in the future be maintained by injection of seawater. The design of this sea water injection system is open and to be determined by the operator. Deck space has been allowed for this future system. A caisson for a future installation of asea water lift pump as well as biocide injection facilities into this caisson will be provided. The pressure at the head of the injection well will be ca. 143 barg.

1.1.3.

Vent system

The process system is designed as a closed liquid system with no normal venting to atmosphere. The process system is protected against over pressure by relief valves. In the event that the relief valves discharge hydrocarbon liquid this occurs via a liquid collecting vessel and a cyclone separator. The flashed off vapours are vented to atmosphere at safe location. The quantity of liquid relieved is limited by the installation of a High Integrity Environmental Protection System (HIEPS). On activation the HIEPS will shut down the oil producing wells. The separated liquid in the collecting vessel is pumped back into the production header.

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1.1.4.

Drainage System

The platform is equipped with a hydrocarbon drainage system for maintenance activities. This system drains to the liquid collecting vessel. The collected liquid is pumped back into the production manifold and exported. For rain water and wash down a separate system is provided. The drained liquids are collected in an oil skimmer tank. After separation of any oil the water is discarded over board via the WHP Monotower.

1.1.5.

Fire fighting

The well head will be provided with a dry fire water ring. Supply of fire water will be from from the fire water pumps of the jack-up drilling facility.

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2.0 BASIC DATA 2.1.

JACKY RESERVOIR DATA 2.1.1.

Reservoir parameters for well 12/21-c-6

Reservoir fluid type Max WHSIP Reservoir pressure Reservoir temperature

Waxy Black Oil 77 barg 1) at 2107 m 256 barg at 2107 m 85 0C 1)

2.1.2.

Under natural flow, unpumped

Fluid properties

Bubble point pressure Gas oil ratio API gravity Pressure Psia 7014.7 6014.7 5014.7 4014.7 3329.7 1) 3014.7 2014.7 1014.7 787.7

2)

58.9 bara 153 scf/bbl 38.9 (SG 0.83) Table 1: Reservoir Fluid Viscosity (at reservoir temperature 85 0C, from 12/21c-6 MDT sample)

Viscosity cP 1.935 1.796 1.662 1.534 1.437 1.411 1.297 1.195 1.174

1) Reservoir pressure 2) Saturation pressure

2.1.3.

Wax properties

Analysis Appearance Temp./Cloud Point Pour Point

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Test Method

Result

Unit

DSC

43

0

27

0

IP15

C C

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ITHACA ENERGY (UK) Ltd. JACKY WHP WELLHEAD FACILITIES Wax content

BP modified

Not known

% mole/mole

For restart of the 10.5 km 4.5” ID flow line from Jacky to Beatrice Alpha a differential pressure of 147 barg is required.

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2.1.4.

Contaminants

The CO2 content of the Jacky fluids is ca. 0.44 mol%. For design the H2S in the gas phase is 0 ppm. A spare chemical injection point will be provided on the manifold for future dosing of a H2S scavenger if reservoir souring would occur.

2.1.5.

Formation Water composition

For design the Beatrice water composition is to be taken:

Component

Concentration

Sodium Potassium Calcium Magnesium Barium Strontium Iron

20400 228 2389 297 4.9 188 0.7

Chloride Sulphate Bicarbonate

38350 138 285

% Seawater Fmtn Water Cl (mg/l) Check ion balance TDS pH

5

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39411 -2.26% 62281 7.5

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2.2.

DESIGN FLOWRATES

The prognosed production profile is presented in table 2:

Year

Oil b/d

Liquids b/d

Gas Mscf/d

Injection b/d

1

10017

11346

1533

15000

Prod. Water b/d 1329

2

3753

10285

574

10629

6532

3

2365

11747

362

12227

9381

4

1505

12000

230

14047

10495

5

1041

12000

159

15000

10959

6

778

12000

119

15000

11222

7

614

12000

94

15000

11386

8

499

12000

76

15000

11501

9

423

12000

65

15000

11577

10

368

12000

56

15000

11632

MM bls

7.8

42.9

55.5

35.1

Table 2: Production Prognosis For design these maximum flow rates will be incorporated: Oil rate Fluid rate Water injection rate

2.3.

15000 bopd 15000 bpd 15000 bpd

INJECTION OF CHEMICALS

2.3.1

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Production Fluid

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ITHACA ENERGY (UK) Ltd. JACKY WHP WELLHEAD FACILITIES Provisions will be installed for injection of these chemicals in the produced liquid at the production manifold. Space will be reserved for a future H 2S scavenger dosing unit. A H 2S scavenger injection point on the production manifold will be made.

Corrosion Inhibitor

Wax inhibitor

Scale inhibitor

Bpd

15000

5000

15000

ppm

50

200

10

Lit/d

120

160

24

Chemical Fluid rate Spec.Injection rate Cont. Injection rate

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3.0 SYSTEM DESCRIPTION The Jacky WHP is a Minimal Facilities Satellite Platform and will consist of these facilities: -

Two oil wells (1 existing + 1 future) and one future water injection well and one spare slot Production lines, connecting the oil well heads to manifold Production manifold with injection points for chemicals Riser connection to sub sea export line A vertical pig launcher and facilities to fit a horizontal intelligent pig launcher. Future incoming 6” riser Storage and dosing units for chemicals (3 off). Next to injection point for these chemicals a spare injection point shall be provided on the manifold. A caisson for future installation of a sea water lift pump A storage and dosing unit for biocide (hypochlorite) injection into this caisson shall be provided. Vent system with cyclone separator and liquid collecting vessel Dry fire water main ring for well heads Hydrocarbon drain system Rain water / wash down drain system

Control facilities to be provided are: -

3.1.

12” J-tube unbiblical cable riser (2 Off). Hydraulic Well control unit for 3 wells An Electrical Power Unit with Transformer/Variable Speed Driver Unit for 1 oil well ESP.

WELL HEADS (3 OFF) BY OTHERS Functional Description The Jacky well head platform will be erected over existing drilled oil well 12/21c-6. In the near future a second oil well and a water injection well will be drilled. The SSDHSV, the SSV and FWV of these wells will be provided with hydraulic lead lines from the well control unit and with open/closed signalling. Signals for monitoring the casing and annulus pressures will be provided. The max. WHSIP = 77 barg. The reservoir temperature is 85 0C The well ESP discharge pressure is controlled and protected not to exceed the maximum allowed operating pressure of the selected 5000# API X-mas trees = 345 barg.

Design Requirements By others: The Xmas tree will be provided with a 4-1/16 ” RF 5000# flange. Design pressure is 345 barg (= MAWP 5000# API Christmas tree) Design temperature is -20/100 oC.

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3.2.

PRODUCTION LINE 4” Functional Description A 4” insulated production line is connected to the FWV on the Xmas tree of well 12/21c-6. The pressure in the system is set by the pressure drop over the subsea pipeline and the arrival pressure at Beatrice Alpha. This pressure depends on the applied control of the receiving facilities at Beatrice Alpha (above bubble point =54 barg ). There will be no choking at the Jacky WHP. Design Requirements Pipe line material UNS 531803 Design pressure is 345 barg Design temperature is -20/100 oC. Electrical tracing: Temperature to be maintained above 35 0C to prevent solidification.

3.3.

PRODUCTION MANIFOLD 6” Functional Description The production line from the existing well 12/21c-6 and the second oil well to be drilled in the near future will be connected to a 6” production manifold of duplex steel. The manifold is provided with a set of PSV’s (2 x 100 %) to limit the pressure in this manifold to the MAWP of the sub sea pipeline = 115 barg. To limit the amount of liquids relieved a High Integrity Environmental Protection System (HIEPS) is installed to limit the duration of the relief. This production line and manifold are provided with electrical tracing. The manifold is provided with four(4) injection points for these chemicals: Corrosion inhibitor Scale inhibitor Wax inhibitor Spare, for H2S scavenger Downstream the last injection point there is a change of pipe material: From this point on a carbon steel pipe spec with a 5 mm corrosion allowance is applied. These lines are insulated only. Tie manifold ties in into the barred tee of the vertical 6” riser. The manifold is provided with a 6” flanged off connection for a future riser for an incoming pipeline. Design Requirements Pipe line material:

Up to and including last injection point: UNS 531803 (Duplex) Downstream last injection point: CS with 5 mm CA

Design pressure:

Up until HIEPS+PSV’s: Downstream PSV’s:

Design temperature:

-20/100 oC.

Insulation:

Up until HIEPS+PSV’s: Downstream PSV’s:

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345 barg 115 barg

Electrical tracing set at 35 0C Heat conservation.

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3.4.

RISER CONNECTION 6” Functional Description Via a vertical 6” riser the Jacky WHP is connected to the subsea export line to the Beatrice Alpha host platform. The riser is provided with with a vertical pig launcher, a barred tee, an ESDV at the top deck and runs via the jacket monopile to a flanged off connection to the subsea pipeline to Beatrice Alpha. A drain valve is provided upstream of the ESDV to allow draining of the production lines and manifold. Draining of this riser is achieved by pushing the liquid inventory to the liquid collecting vessel with nitrogen. Pipe line material:

CS with 5 mm CA

Design Requirements

3.5.

Design pressure is Design temperature is

115 barg -20/100 oC.

Insulation:

For heat conservation.

Hold, to be confirmed by Operation

WATER INJECTION SYSTEM COMPANY may install a water injection facility at a later time, configuration of the injection facility will be by COMPANY how ever deck space has been allowed for should COMPANY elect to install seawater lift pump filters and injection pump on the Jackey platform, additionally a sea water lift pump caisson and biocide injection are pre-installed on the Jacky facility for any future sea water injection system.

Functional Description Sea water is used to for water injection into the reservoir. The required pressure at the injection well head is 143 barg. The design of this sea water injection system will be determined by the operator. Design Requirements Flow rate: Material:

15,000 bwpd (79.3 m 3/h) Duplex

Design pressure: Design temperature:

165 barg (1500#) -20/50 oC.

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3.6.

CHEMICALS STORAGE TANK JK-12-T-102/202/302/402 Functional Description A multi-compartment tank JK-12-T-102/202/302/402 is used for storage of chemicals. The compartments will be filled up via hoses from a service boat once every month. The chemical storage tanks and chemical injection pumps are located in a bunded area.

JK-12-T102 JK-12-T202 JK-12-T302 JK-12-T402

Chemical

Volume Gross (m3)

Volume Nett (m3)

Hypochlorite (14wt %)

2.5

2.0

Wax Inhibitor

7.5

6.0

Corrosion Inhibitor

7.5

6.0

Scale Inhibitor

2.5

2.0

Total

20

Dimensions LxBxH (m x m x m) 0.75 x 1.35 x 2.50 2.25 x 1.35 x 2.50 2.25 x 1.35 x 2.50 0.75 x 1.35 x 2.50 6.00 x 1.35 x 2.50

Design Requirements Material: Design pressure: Design temperature:

3.7.

SS316L Atm. -20/+ 50 oC.

CHEMICAL INJECTION PUMPS JK-12-P-101/201/301/401/501 Functional Description Each tank compartment is provided with a dosing pump skid. Each skid consists of a single dosing pump, a calibration pot, a dampener, relief valve, flow gauge and the necessary piping/tubing with valves.

Pump Tag

Chemical

JK-12-P101 JK-12-P201 JK-12-P301 JK-12-P401 JK-12-P501

Hypochlorite (14wt%) Wax Inhibitor Corrosion Inhibitor Scale Inhibitor Common Back-up

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Capacity m3/h

Duty kW

Design Pressure barg

Design Temperatur e 0 C

Material

0 – 0.100

0.75

115

-20/+50

SS316L

0 – 0.010

0.25

-20/+50

SS316L

0 – 0.010

0.25

115

-20/+50

SS316L

0 – 0.010

0.25

115

-20/+50

SS316L

0 – 0.010

0.25

115

-20/+50

SS316L

115

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3.8.

VENT SYSTEM Functional Description The Jacky WHP will be provided with a vent collecting system with open release to atmosphere at safe location. The production lines and manifolds are vented via the kicker line connection (= highest point). A 4” blinded off RF flange is provided to connect the vent system to the drilling rig. The system is provided with a cyclone separator to remove entrained liquid from the vented vapours. The vent system is provided with a liquid collecting vessel. This vessel also serves to collect drained liquid from the production lines and the riser upstream the ESDV. The liquid from this collecting vessel is pumped back to the production manifold.

3.8.1

Vent Cyclone JK-14-V-01

Entrained liquid from the vented vapours will be separated off. Dimensions: Diam: 400 mm Height: 1200 mm Design Requirements Vent System Material Design pressure: Design temperature:

3.9.

SS316L 5.0 barg -70/+ 50 oC

DRAIN SYSTEMS

Liquid from the vent cyclone and drained liquids from the production lines will be collected in a vessel. The collected liquid will be pumped back to the production manifold. Rain water is first directed to a skimmer vessel (oil slot) to remove hydrocarbon contamination before it is discarded to via the monopole to the sea on gravity. Skimmed oil will be manually drained to the liquid collection vessel.

3.9.1

Liquid Collecting Vessel JK-16-V-101

Dimensions:

3.9.2

800 mm 2500 mm 2.4 m3

Oil Slot JK-16-V-102

Dimensions: Volume:

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Diam: Height: Volume:

2.5m x 1.5m x 2.0m 7.5 m3

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3.10. FIRE WATER DRY RING MAIN Functional Description On dry fire water ring main will provide passive fire water coverage during drilling/workover activities. Supply of firewater will be from the drilling rig. Design Requirements Material

Galvanised Carbon Steel

Design pressure: Design temperature:

5.0 barg -20/+ 50 oC.

3.11. J-TUBE UMBILICAL CABLE RISERS The Jacky WHP is provided with power from the Beatrice Alpha Host jacket via an umbilical cable tube. Signal cables from/to the host jacket are also guided via a J-tube. Two 12” J-tube umbilical cables will be provided.

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4.0 STRUCTURAL The Jacky Wellhead platform will be installed in a water depth of 39.380 m (LAT) and has a design life of 10 years. The substructure is suitable to support the topsides with a deck leg spacing of 10 * 13 m. The substructure will be a by 3 suction piles founded mono-tripod structure having a central column with a diameter of approximate 4500 mm. The stabbing point elevation is at approximately EL. (+) 15.500 m. Three conductors, one caisson, one 12”J-Tube and one future and one 6” riser and one future are located inside the central column. The substructure will be transported vertically on its buckets. Lifting of the substructure will be by means of two trunnions connected to the central column at approximate EL. (+) 14.750 and by two padeyes on top of two buckets. All lift points will remain in place for future removal. The platform topsides consist of four decks and has no helideck. Deck legs of 38” are foreseen. A pedestal crane will be located on one of the intermediate topside columns. Four padeyes will be located on top of the top deck and will remain in place for future removal. Since the top deck is grated temporary cross braces are required just above the top deck. Access to the water level is by means of a ladder. It is assumed that the platform will not be sheeted. At start of the detailed design phase a structural basis of design will be prepared. Structural analyses (based on API-WSD 21 st edition and AISC 9th edition) to be executed during the detailed design are: Load-out, transport and lift analysis for substructure and topside In-place analysis for substructure and topside Dynamic spectral fatigue analysis for substructure Boat impact analysis (based on 3.4 MJ energy absorption) for the substructure After boat impact analysis for the substructure Cathodic protection analysis for the substructure Removal lift analysis for substructure and topside. • • • • • • •

The steel weight of the substructure is about 700 mT and is based on an in-place and fatigue analysis only. Environmental data is taken from revision 1 of PhysE document C187-07R265.V1-1D dd. 26-07-2007. This is without conductors, risers, buckets and its fixation steel to the mono-tripod structure. The steel weight of the topside equals about 260 mT and is based on an in-place and lift analysis. This weight is without pipe supports and any architectural weights (e.g. walls and doors). Minimum yield strength used equals 345 N/mm 2.

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5.0 PLOT PLAN & PIPING The layout of the Process & Facilities for the Wellhead facilities is based on the proposed platform layout in Contractors tender and incorporates both the HAZOP and HAZID findings and design development agreed with COMPANY and early vendor data. AFD Plot Plans are appended in attachment 8. The plotplan developement takes into account process considerations for the arrangement of the various process systems and provides ample space for escape routes and maintenance access. Space allowance for future installation of flow line of future second production well and equipment associate with the well down hole submersible pump has been taken into consideration in the plot plan development and tie/in´´s to the process and utilitiey systems. Space for the installation of a future water injection module has been allowed for on the top deck. All process systems have been located in the Main Deck, including systems required for the wellheads such as the Wellhead Control Panel, Wellhead Piping Manifolds, Choke Valves and E&I rooms. Chemical istorage and injection facilities are located on the well head access deck. Celler deck accommodates waste water )rain and washdown’processing prior to overboard discharge. Any waste oil slops and a pump to pump any collected waste oil back the production manifold for export with the Jacky produced fluids, also no the celler deck are the export rises isolation valve and provision for any isolation valves associated with the future riser. Mechanicall handlins study and crane operations hves been taken into account to facilater ease of operation activities during attendance of the platform from the Betriace A platform. Overall the design has taken into account the requirement to test and commission systems in the construction yard and minimise offshore hook/up and commissioning activities. The Electrical & Instrumentation rooms are located on the platform easten side, located between the main and top deckforeseen are divided in two layers: - Lower level (man deck) Instrument room - Upper level (well head access deck) the electrical equipment. A platform specific piping specification has been developed and is appended in attachment XX, in principle process pipingh is duplex steel until down stream of the manifold were it reverts to carbon steel to match the riser/export pipeline material. Layout of the piping nas taken into account the requirement for ease of maintenance.

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6.0 ELECTRICAL SYSTEMS 6.1.

INTRODUCTION Purpose This section of the document defines the minimum overall electrical design requirements for the JACKY Wellhead platform to being engineered and constructed for ITHACA. Energy Ltd. Definitions The word shall indicates a requirement. The word should indicates a recommendation.

6.2.

SCOPE This section defines the configuration, equipment, performance and operation of the electrical power generation and distribution system for the JACKY WELLHEAD PLATFORM. Provision in the form of space in the swithchgear and plot space in the electrical rooms will be provided for the future installation of seawater injection equipment and a varable speed drive for the future electric submersible pumr fot the future well.

6.2.1

COMPANY free issued equipment

The following equipment will be procured by COMPANY and free issued to contractor who is responsible for its intergration into the design: -

6.3.

Sub-sea power and control unbilical together with its hang-off and splitter box. Electric Submersible Pump (ESP), down well cable and junction box together with the ESP Variable Speed Drive unit.

GENERAL DESIGN REQUIREMENTS

6.3.1 Codes, standards, regulations and references In conjunction with this Specification, the Codes, Standards, Regulations and References listed below shall be applicable. All installations and specified equipment shall conform in design, material and performance with the latest editions (including amendments) of all applicable IEC Codes and Standards, European standards.

6.3.2

Environmental conditions

Electrical equipment shall be suitable for long term, continuous operation at part or full load on the electrical system having the characteristics specified on the data sheet. Equipment shall be suitable, in all respects, for operation in the following site environmental and service conditions. Maximum outdoor temperature +25°C Minimum outdoor temperature -6,5°C Maximum indoor temperature +35°C Minimum indoor temperatures +5°C Altitude <1000m

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6.3.3

Area Classification

To determine the hazardous area's the IP15 will be used. All equipment (including all equipment in package units) for use in classified areas shall comply with the requirements of IEC 60079-14.

6.4.

FUNCTIONAL REQUIREMENTS 6.4.1

Operating requirements

As defined in requisitions and data sheets.

6.4.2

Equipment enclosures

The international Standard IEC 60529 outlines an international classification system that describes the sealing characteristics of electrical equipment. The classification system defines the level of protection provided by enclosures to prevent the ingress of foreign objects and moisture into the electrical equipment. The equipment enclosures shall, as a minimum, comply with the following IP classification -

6.5.

For outdoor, motors For outdoor, controlstation and junction boxes Dry indoor areas Other areas

IP 56 IP 56 IP 20 IP 44

ELECTRICAL DESIGN PHILOSOPHY 6.5.1

General

The electrical system and associated controls design have been based on the requirements of the wellhead platform electrical demands. The whole of the electrical installation is based on the provision of a safe and reliable supply of electricity at all times. Safe conditions are ensured under all operating conditions. The insulating and dielectric materials used in all electrical equipment is non-toxic and does not contain compounds that are persistent and/or hazardous environmental contaminants, e.g. polychlorinated biphenyls (PCBs). System studies and protection reports, etc. shall be provided in support of the design. Such studies will comprise a minimum of the following: Load flow studies Fault level studies

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6.5.2

Power distribution & equipment

The Jacky Wellhead platform will get its electrical supply from Beatrice Alpha via a sub sea cable. In the 11KV Switchgear there will be a HV distribution to ESP pumps and transformer for 400V This transformer will be installed in the LV switch room. The transformers will be equipped with taps on the HV windings. The LV configuration shall be three phase and neutral with a separate earth (TN-S). Single phase electrical power will be derived from one phase and neutral, of the three phase supply, at a nominal voltage of 230V AC. All 230V MCB will be equipped with 30mA earth fault protection. A Uninterruptible Power Supply (UPS) 230 VAC isolated systems will be provided for those ‘vital loads’ which require a continuous ‘no-break’ supply of power in the event of a total power supply failure. Battery capacity shall be calculated at 10ºC.

6.5.3

Battery Back-up requirements

Emergency and Escape lighting All instrumentation systems HV Switchgear LV Switchgear ESP pump VSD's

6.5.4

1 hour 2 hours 2 hours 2 hours 5 minutes

Cabling & wiring

All cable shall be Draka RFOU/BFOU unless stated different. During the engineering, all power and control cables shall be identified and sized accordingly Maximum voltage drop from 400V transformer to connection point of mentioned equipment: Lighting and small power 5% Motors normal running 5% Motors by starting 15% Earthing through cable: Field equipment shall be connected to the PE system through the cable. The braid armour shall be the earth conductor and it shall be electrically continuous from the field to the central equipment PE bar. Equipment supplied by single core cables shall be connected to PE by a separate earth cable. Cable markings: Cables shall be identified by means of unique cable numbers listed on the cable schedule.

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6.5.5

Cable glands

Cable glands/blanking and drain plugs shall be selected as follows: Plastic enclosures (relevant for field cables) plastic Metal enclosures (except aluminium) brass Aluminium enclosures stainless steel /nickel plated brass The certifications of the cable glands/blanking/and drain plugs shall comply with the certification of the equipment in which the glands/plugs are connected. Ex‘d’ gland only to be used on Ex’d’ direct entry equipment. Cable Gland Brand shall be Hawke type 501/453/Universal.

6.5.6

Earthing and bonding

Earthing Overview Earthing and bonding shall be provided to minimise hazards to personnel and equipment from short circuits, lightning discharges and static charges. The system shall be designed to limit or contain the adverse effects of electromagnetic interference on instrumentation and control systems. In addition to any cable armouring, the metallic non-current carrying parts of all electrical equipment shall be bonded to the main, plant earth. Earth bar Earth bars shall be fabricated from copper and provided to suit number and size of connections. Earth bars shall be connected to the nearest convenient main structure point through an insulated earth conductor. Earth boss Where earth bosses are used, each earth boss shall only have one connection. Bonding bosses in outdoor and exposed areas to be coated to prevent corrosion. Metallic enclosures The metallic enclosures of electrical equipment shall be bonded to the plant earth grid. The metallic enclosures of non-electrical equipment, e.g. tank, shall also be bonded to the plant earth. The bonding shall be made with two independent earth connections. The cross section of the cables shall be sufficient to avoid mechanical damage. The cables shall be bolted to earth bosses who are welded to the structures. Cable ladders / cable tray’s All sections of cable ladders and cable trays shall be bonded. Begin and the end of the tray/ladder shall be connected with the metallic structure.

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6.6.

LIGHTING DESIGN 6.6.1

General

The lighting installation within the JACKY WELLHEADPLATFORM complex is designed to accommodate two categories of lighting. These categories shall provide an illuminated environment in which: a) normal working can be carried out without the need for supplementary illumination b) escape routes and exits are clearly illuminated.

6.6.2

Lighting Categories

Two basic lighting systems are being provided: Normal lighting – the permanently installed lighting operating from the supply in normal use. Emergency/Escape lighting – that part of the emergency lighting which is provided to ensure adequate illumination for evacuation/escape purposes. Escape lighting is equipped with batterys with 1 hour autonomy.

6.6.3

Luminaire types

Area illumination is accomplished by utilising luminaries of the following types, based on a detailed study of the area and selecting the most suitable ones for the areas in which they are to be installed. High pressure sodium discharge. (Chalmit) Tubular fluorescent. (Victor trident) Battery backed fluorescent. (Victor trident)

6.6.4

Levels of Illumination

The general illumination levels, measured at the working plane or 1 m above the floor level in a horizontal plane, are shown in the table below. These values have been used as a basis for the design of new installations. The tabulated illumination levels apply when the luminaries are dirty, i.e. after taking account of the following fouling factors: Location Fouling Factor Plant areas (both indoor and outdoor): 0.80

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6.6.5

Required Illumination Level

LOCATION

Internal Areas HV Equipment room E/I Equipment room Messing Deck area Walkways, Platforms, Access Ways, Stairs And Ladders Reading Instrument/Equipment

6.6.6

REQUIRED MINIMUM ILLUMINATION LEVELS AT WORKING PLANE OR 1m ABOVE FLOOR LEVEL IN A HORIZONTAL PLANE. Normal lighting Emergency lighting illumination (Lux) illumination (Lux at floor level, escape routes & doors) 300 300 300 50 20

1 1 1 1 1

100

1

Aircraft Warning Lights

Aircraft Warning light where required.

6.6.7

Distribution and Control

Electrical power is distributed to lighting systems at single phase and neutral from three phase and neutral distribution switchboards. MCBs have been used to protect final sub-circuits, with 16A being the maximum rating for circuits supplying lighting. Platform fluorescent lighting is controlled via a manned/unmanned switch. Flood lights are controlled via a switch in the E/I equipment room (only powered when platform is manned.

6.7.

SMALL POWER DESIGN The small power installation within the JACKY WELLHEAD PLATFORM complex has been designed to accommodate convenience & power socket outlet. For maintenance purposes an adequate number of 230V 16A single phase, neutral and earth convenience outlets, have been provided at suitable locations. Type GHG 511 4306 R000?

6.7.1

Welding Socket Outlets

Welding outlets are 3 phase, neutral and Earth (5 pin) rated for 400V. These outlets are rated for 63A and suitable for outdoor installation. Located on every deck except Celler deck. Type GHG 514 4506 R??01

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6.8.

TRACE HEATING The trace heating installation within the JACKY WELLHEAD PLATFORM has been designed to accommodate two categories of heating. These categories provide the following: a) Winterisation (frost protection) b) Process tracing

6.8.1

Self-Regulating/Self-Limiting Heaters

Self-regulating/self-limiting heating tape has been utilized. Type Bartec Electrical power is distributed to trace heating systems at single phase and neutral from three phase and neutral distribution switchboards. MCBs have been used to protect final sub-circuits, with 16A being the maximum rating including 30mA earth fault protection for

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7.0 INSTRUMENTATION AND COMMUNICATION SYSTEMS General The Instrumentation One combined Electrical/Instrumentation room is provided in a dedicated two level container on the Main deck of the Jacky Wellhead Platform. The rooms have a light overpressure. Air corridors are not foreseen. As no data is available for the existing Beatrice Alpha platform systems in the ITT Package, all activities and/or modifications on Beatrice Alpha are excluded. Scope of supply The Scope of Supply comprises the following: Integrated Control & Safeguarding System (ICSS) Telecommunications Hydraulic Wellhead Control Panel (WHCP) (two (2) well outfitted, space for one (1) additional well provided) Corrosion Monitoring System Downhole Gauge Equipment Field instrumentation (On/Off valves, Control valves, Transmitters & Gauges) Gas detection equipment Matrixes The instrumentation equipment (except field instruments) will be installed in the dedicated E&I room (see section 6.8) Integrated Control and Safety System (ICSS) An Integrated Control & Safeguarding System will be provided. The system shall consist of Wellhead- and Utility Systems. The system shall interface the Rig Control Network and Safety System via an optical and hardwired connection. The ICSS shall monitor and control all operations performed within the boundaries of the utility and wellhead module. The ESD and Gas system shall be integrated into the ICSS. The alarm system shall provide audible/visual warning of faults in machinery, process equipment and control systems, etc. If space permits components of the telecommunication system will be installed in the ICSS cabinet. An Engineering Station shall be installed in the combined Electrical/Instrumentation room. Dependant on Ithaca requirements this will be a laptop or desktop computer. Telecommunications A dual redundant fail safe telecommunication system shall be installed utilising the fibre optic cable that is part of the HV cable. The communication system comprise of patch panel, routers/switches, converters and required cables. If space permits components of the telecommunication system will be installed in the ICSS cabinet.

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Telephone System The existing automatic telephone exchange, PABX, on Beatrice Alpha will be used to cover the additional area/spaces on the Jacky Wellhead Platform. It is assumed that two spare extensions are available. Hydraulic Wellhead Control Panel (WHCP) A Stainless Steel Hydraulic Wellhead Control Panel shall be provided for 1 production well and 1 injection well with provisions for actuating required control & on/off valves. Furthermore, space will be provided for one (1) additional well. Corrosion Monitoring System A Corrosion Monitoring System using Field Signature Method (FSM) is foreseen. Dependant on Ithaca requirements and/or existing Beatrice Alpha systems another method may be preferred. Downhole Gauge Equipment A surface installed Acquisition System for Downhole pressure & a temperature measurement is foreseen. Downhole pressure & temperature Gauges and interconnecting cables are assumed to be supplied by Company. Field instrumentation All necessary field instrumentation, e.g. On/Off valves, Control valves and Transmitters will be delivered as indicated on the P&ID diagrams attached to this document. For Oil and Seawater flow, transmitters of Coriolis type are foreseen. Ship collision detection shall use motion detection switches. Fire & Gas detection equipment For gas detection two acoustic leak detectors and two point gas detectors are foreseen. Fire detection is not included other than fusible plugs in SSV & ESDV hydraulic supply. Matrixes A matrix panel with key switch and indication function will be wall mounted in the combined Electrical/Instrumentation room.

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8.0 LIFE SAVING EQUIPMENT Tenderer has foreseen Life Saving Equipment is for 6 (six) persons available on the platform. For additional personnel brought on to the platform during Commissioning, Installation and Maintenance temporary Life Saving Equipment shall be provided. Safety Equipment All personnel visiting the platform shall have successfully passed the required safety and emergency response training and shall be familiar with the rescue means available on the platform. Table 1: Overview of Portable Rescue Equipment Jac Description Detail ky WH P 1 Inflatable life raft Minimum 6 persons, throw overboard, self-inflating. Portable VHF/FM marine radio to be taken from LV Switch room or from Marine vessel. 6 Personal descent units to descend into the life rafts; the units can be attached to an anchoring/launching frame 6 Personal protection equipment Smoke mask, torch, fire gloves Located inside Canteen 5 Life buoys Top Deck Wellhead Main Deck Access Deck (2 with light and smoke) One @ One @ One @ (1 with rope) platform West platform South platform West & one @ East (with light (with rope) platform East and smoke (with light and signal) & one smoke signal) @ platform North 1 First aid kit Located in E&I rest area 1 Stretcher Located in E&I rest area 3 Eye wash stations One located on West side Top Deck nearby (Two Bottle package) entrance Chemical Storage Container One located on Wellhead Access Platform nearby Entrance High Voltage Switch room One located on Main Deck at entrance LV Switch room. 2 Fire blankets One located on Wellhead Access Platform nearby Entrance High Voltage Switch room One located on Main Deck at entrance LV Switch room.

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Following provisions shall be hand carried to the platform for those travelling to Jacky WHP facilities: Survival suits Man Over board beacons Life jackets Crew Basket Fire fighting suits Breathing sets

Oxygen kit

Each person arriving with Survival suit Each person arriving wearing MOB beacon. Each person arriving with Life jacket To be available with Drilling platform or Marine vessel To be available with Marine Vessel Set of self-contained air breathing apparatus (with one compressed air bottle each) of make Dräger, type PA-80-A1800-1 to be available with Marine vessel Dräger Akuut 2001 breathing aid to be available with Marine vessel

Portable Fire Fighting Equipment In total 7 fire extinguishers are foreseen on the platform. The location and type is given in the next table.

Deck / Room

Top Deck Wellhead Access Deck HV Switch Room – Wellhead Access Deck

CO2 Numb er

Fill (kg)

1

5

Main Deck LV Switch Room – Main Deck E&I rest area – Main Deck

1

TOTAL

2

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Powder Numb er 2 1

Fill (kg) 12 12

1

12

1

12

5

12

5 5

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ATTACHMENTS

ATTACHMENT 1

STRUCTURAL -- Isometric Sketches Structural Steel Topsides & Jacket

ATTACHMENT 2

Main Equipment List

ATTACHMENT 3

P&ID Diagrams

ATTACHMENT 4

Key One Line Diagram 11 kV

ATTACHMENT 5

400V AC Distribution MCC One Line Diagram

ATTACHMENT 6

Lay-out E&I rooms

ATTACHMENT 7

Electrical Load List

ATTACHMENT 8

Layout Drawings

ATTACHMENT 9

Instrumentation Block Diagram

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Attachment 1 STRUCTURAL: Isometric Sketches Structural Steel Topsides & Jacket

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Attachment 2 Main Equipment List

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Attachment 3 P&ID Diagrams

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Attachment 4 Key One Line Diagram

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Attachment 5 400V AC Distribution MCC One Line Diagram

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Attachment 6 Lay-out E&I rooms

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Attachment 7 Electrical Load List

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Attachment 8 Layout Drawings

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070204-FD-001.rev 2 - 31-01-2008 Boukje

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