Offshore Valves for FPU

8/10/2019 Offshore Valves for FPU

1/21

Shtokman Development AG

Offshore

Floating Production Unit (FPU): Valves

Technical meeting with Russian valve manufacturers

Moscow 24th June 2010


2/21

2

Summary

Offshore Project Description

FPU presentation

Valves main characteristics

General design requirements


3/21

3

650 km650 km

Shtokman Field Mourmansk : 650 kM

280 km280 km


4/21

4

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 capacit y: 71.2 MSM3/d Winterization

Subsea trunkline to shore 2 x 36 x 550 km Dry 2 phasetransport

Drilling rigs

Logistics (vessels & helicopters) Ice and Iceberg Management


5/21

5

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)


6/21

6

FPU Process presentation

TEG

Regen.

Package

Gas

Metering

To 36"

trunkline 1

MEG pretreatment,

reclamation and

regeneration

To Produced

water treatmentOverboard

Swi

vel

MP Compression

(2x 75 %)

Gas dehydration train

(3 x 33%)

Gas Compression (4 x 33 %)

To Users (HP

and LP)

Fuel gas system (1 x 100%)

CONDENSATE TRAIN (2 x 100%)

Production

manifold

(3 x 33%)

Gas

Metering

To 36"

trunkline 2

De-sanding

Inlet

Separator(3 x 33%)

EXPORT

GAS PROCESS

INFIELD

RISERS

INLET

SEPARATION


7/21

7

Technological Development

Shtokman FPU Main technological challenges

Topsides Winterization)

Disconnectable through

MRB/Turret/swivel

First FPU development

of its kind paving the

way for future Arctic

development

EER

Daily production (70MSm3/d)

Ice-resistant hull design for sea ice

and iceberg


8/21

8

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


9/21

9

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 onboard50 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 topsidesAchieve 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.


10/21

10

FPU Layout Design Principles (2/2)

Process functionsLQ & Utilities functions

Storage of

MEG, Diesel, slop etc

& utili ties equipment

Storage of

Water etc

& util ities equipment

No gas

Below main

deck

Safer

Safer

(& warmer)

Low Pressureand Liquid

High PressureGas

Flare stack &KO drums

TR


11/21

11

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 FPUGetting 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


12/21

12


2 to XX

1 to 24

2 to 42

2 to 42

Size

365

360

3000

750

Topsides

approx Qty

300# to 2500#75Relief valves

300# to 2500#90Automatic and Manual

control valves

150# to 2500#Manual On/Off Valves

150# to 2500#145Actuated On/Off Valves

RatingHull approx

Qty

Categories

All valves will be supplied by main contractor or packages vendors fromapproved 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


13/21

13


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) valvesare considered, mostly in Turret;

To address long design life of the plant (50 Years) following featuresobserved:

High level of integrity, reliability and availability;

Enhanced design and robust materials selection;

Proof sealing systems;

Enhanced FAT;


14/21

14

Mono-block DB&B Valves typical design


15/21

15


Typical application for

monobloc DBB inside

Turret area (QCDC

System)


16/21

16

Valves main characteristics: side entry, forged

body, flange ends


17/21

17

Valves main characteristics: full welded body


18/21

18

Valves main characteristics; side entry, forged

body, hub ends


19/21

19

Ball valve with DP seat design


20/21

20

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


21/21

21

THANK YOU

Documents

Offshore Valves for FPU