Jun 24, 2010 ... The TR is a protected and independent cocoon inside the LQ designed for: –
Direct connection ... API 6D, API 598, API 6FA/607. BS 6755xx ...
Shtokman Development AG
Offshore Floating Production Unit (FPU): Valves Technical meeting with Russian valve manufacturers Moscow 24th June 2010
Summary
Offshore Project Description
FPU presentation
Valves main characteristics
General design requirements
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Shtokman Field – Mourmansk : 650 kM
280 km
650 km
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• • • • • • •
• • •
340 water depth reservoir 2 000 m below mud line Reserves estimated to 3 700 GSm3 Covers an area of 1 400 km2 2 subsea templates per drill center 3 Drill centers - 20 wells 16” flow-lines & 14” flexible risers Floating Platform: – Ice resistant & disconnectable floater – Design capacity: 71.2 MSM3/d – Winterization Subsea trunkline to shore 2 x 36” x 550 km Dry 2 phase transport Drilling rigs Logistics (vessels & helicopters) Ice and Iceberg Management
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FPU Main Characteristics presentation
Ice resistant & turret disconectable floater Self propulsion (3 aft / 2 bow thrusters) Gas treatment Design capacity: 71.2 MSm3/d 3 separation & dehydration trains in parallel (3x33%) 2 condensate treatment trains (2x100%) Compression: 85 MW compression duty – 160 barg discharge Gas and Condensate metering before biphasic export Power Generation
Normal – 3 dual fuel TGs - 3 x 40MWe (n+1) Essential – 4 diesel generator – 4 x 10MWe (n) Emergency – 1 EDG – approx 2MWe Cold start – 1 Cold start generator – approx 120kW
Fully winterized FPU FPU POB capacity (300 / 350 for maintenance period in summer)
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FPU Process presentation To Users (HP and LP)
INLET SEPARATION
INFIELD RISERS Production manifold (3 x 33%)
Fuel gas system (1 x 100%) Gas Compression (4 x 33 %)
Inlet Separator (3 x 33%)
EXPORT Gas Metering
To 36" trunkline 1
Gas Metering
To 36" trunkline 2
TEG Regen. Package
Swi vel
Gas dehydration train (3 x 33%)
GAS PROCESS
CONDENSATE TRAIN (2 x 100%) MP Compression (2x 75 %)
De-sanding
MEG pretreatment, reclamation and regeneration
To Produced water treatment
Overboard
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Shtokman FPU – Main technological challenges…
Topsides Winterization)
Daily production (70MSm3/d)
EER Technological Development Ice-resistant hull design for sea ice and iceberg
First FPU development of its kind …paving the way for future Arctic development
Disconnectable through MRB/Turret/swivel
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FPU CLASSIFICATION Dual CLASS Russian Maritime Register of Shipping / BV Class notation as follows:
I HULL MACH Offshore Service Barge Production Unrestricted navigation - Shtokman Field AUTO POSA IG VeriSTAR-HULL HEL ARC DYNAPOS ALM LSA COLD STI COMF
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FPU Layout Design Principles (1/2) • Topsides arrangement is optimized considering Shtokman challenges including: – Safety and Environmental requirements – Cold weather, harsh sea and remote location conditions – Huge gas inventory onboard – 50 years life time requiring stringent IMR • Layout is strictly organized in order to keep the hull as a “safe space” – Segregate risks from topsides process to hull – Great care on hull penetrations for interfaces between hull and topsides – Achieve adequate “safe haven” in hull • Marine systems are able to run independently from process topsides (i.e. as a ship) And …. – FPU Hull space has been used to locate some utilities equipment/systems – FPU Hull deck has been used in order to optimize layout and limit winterization impacts.
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FPU Layout Design Principles (2/2) Flare stack & KO drums
LQ & Utilities functions Safer
Process functions Low Pressure and Liquid
High Pressure Gas
TR
No gas Below main deck Storage of
Storage of
Safer
Water etc…
MEG, Diesel, slop etc…
(& warmer)
& utilities equipment
& utilities equipment
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FPU Living Quarter Design Principles The Temporary refuge is a key element of EER Strategy and FPU Safety Concept. • The TR is a protected and independent cocoon inside the LQ designed for: –Direct connection with the Safety Escape tunnel –Withstanding all major accidental hazards –Increasing the survival period on the FPU –Getting most of the Evacuation Equipment (Primary/Secondary) immediately adjacent to the Living Quarters –Allowing personnel to stay onboard during/after an accident until the “last” moment (i.e. no capsizing of Hull) –Allowing personnel to wait safely for best moment to evacuate. • TR is located at aft to benefit from the Ice-Free Channel created by the FPU. With the TR, the FPU Hull is, at first, our Life Buoy 11
Valves main characteristics Categories
Topsides approx Qty
Hull approx Qty
Actuated On/Off Valves
750
145
Manual On/Off Valves
3000
Automatic and Manual control valves
360
90
Size
Rating
2” to 42”
150# to 2500#
2” to 42”
150# to 2500#
1” to 24”
300# to 2500#
2” to XX” 300# to 2500# Relief valves 365 75 All valves will be supplied by main contractor or packages vendors from approved vendor list
Main ON/OFF valves types used: Ball valves for practically all process applications Gate valves for utilities Butterfly valves for utilities Special Butterfly Valves (2 or 3 off sets) for process applications 12
Valves main characteristics
Main valves materials used: Low Temperature Carbon Steel (LTCS) Stainless Steel (SS) Duplex, Super Duplex LTCS + Inconel 625 WO on all wetted areas
For critical functions: M/M seating, double sealing barriers (dynamic & static), fire safe, antistatic, interchangeability;
Due to tight layout onboard Mono-block Double Block & Bleed (DBB) valves are considered, mostly in Turret;
To address long design life of the plant (50 Years) following features observed: High level of integrity, reliability and availability; Enhanced design and robust materials selection; Proof sealing systems; Enhanced FAT; 13
Mono-block DB&B Valves typical design
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Valves main characteristics
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Typical application for monobloc DBB inside Turret area (QCDC System)
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Valves main characteristics: side entry, forged body, flange ends
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Valves main characteristics: full welded body
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Valves main characteristics; side entry, forged body, hub ends
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Ball valve with DP seat design
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Main general requirements All valves to be design, fabrication and testing in full compliance with applicable SDAG bases of design specifications (GS-EP-PVV-112 & 142, GS-EP-INS-101 & 137 and other project specifications); For Marine applications, Dual class requirements (BV & RS) shall be applied; Interchangeability; Applicable Codes & Standards: ASME B 31.3, ASME B16.34, API 6D, API 598, API 6FA/607 BS 6755xx
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THANK YOU
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