basic whp presentation(1)

Thai Nippon Steel Engineering and Construction Corporation

Oil & Gas

Facilities

Overview


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SCHEMATIC PIPELINE & PLATFORM


Overview of Oil & Gas Facilities Overview of Oil & Gas Facilities

(Offshore)(Offshore)

� Offshore Oil & Gas Facilities typically consist of:

– Wellhead Platforms

– Riser Platforms

– Central Processing Platforms

– Utility and Living Quarter Modules

– Flare Tripods and

– Bridges and Bridge Support Platforms


Overview of Oil & Gas Facilities (Offshore) ContOverview of Oil & Gas Facilities (Offshore) Cont’’dd

WHP1

WHP2

WHP3

RiserPlatform

CentralProcessing

Platform

Utility &Living QtrsPlatform

Bridge

Support

Tripod

FlareTripod

Collects WellHead

fluids.

Can have Testing Facility

Normally Designed for

unmanned operation.

Contains risers from

WHPs. Facilities for pig

receipt and launching.

Normally no processing

facilities.

Main process platform.

Facilities for processing of

the incoming fluid

provided.

Manned platform.

Supplies utilities for CPP.

Also provides

accomodation for operating

personnel.


Well Head

Platform

Overview


Overview Wellhead Platforms Overview Wellhead Platforms

� A Typical Wellhead Platform Consist of the following facilities:

– Slots for Drilling Wells

– Wellhead with control and safeguarding facilities for safe operation.

– Production Manifolds

– Test Manifolds

– Testing Facilities, which can either be:

� Test Separator or

� Multi-Phase Flow Metering


Overview Wellhead Platforms (ContOverview Wellhead Platforms (Cont’’d)d)

� Wellhead Platform Consist of facilities: (cont’d)

– Wellhead Control Panel

– Instrument Gas System

– Cold Vent and off gas disposal system

– Diesel System

– Power Generation / Supply System

– ESD and Control system

– Chemical Injection System


Overview Wellhead PlatformsOverview Wellhead Platforms

� Wellhead Platform Consist of facilities: (cont’d)

– Deck Crane

– Radio Telemetry System

– Fire and Gas Detection System


Process System for a Typical WHPProcess System for a Typical WHPProcess System for a Typical WHPProcess System for a Typical WHP

Vent from other

sources

Choke Valve

Wing Valve

Master Valve

DHSV

From Other

Wells

Kicker Line

ESD

Valve

Pipeline (Sealine) to

Processing Plant

Pig Launcher

Shutdown

Valve

Test

Separator

Pressure Control

Level Control Valve

Level Control Valve

LIC

FIQ

LIC

FIQ

FIQ

PIC

Production

Manifold

Test Manifold

Barred "T"

From Drain System

To CCVT

To Hydraulic Oil Unit

Other

Instrument Gas Filter

Sump Tank

Air Cooler Pressure Reducing Valve

Flowline

Gas

Condensate

Water

Corrosion Inhibitor Injection


Primary

Function

TEST SEPARATORTo separate oil, water, gas

To measure individual flow of oil, water, gas In

order to evaluate well performance

TEST SEPARATOR(CAN BE 2 PHASE OR

CAN BE 3 PHASE)

WELL TESTING

WELL BLOWDOWN

WELL CLEANING

Design

Function


PIGGING

PIPELINE CLEANING

WAX REMOVAL

PIGGING SYSTEM

SCHEMATIC OF PIG LAUNCHER FOR REFERENCE

PIG LAUNCHER PIG RECIEVER


VENT & FLARE

VENT = SYSTEM DESIGNED TO VENT GAS TO ATMOSTPHEREWITHOUT FLARING

COLD VENT = VENT HANDLING SIGNIFICANT FLOWRATE FROMPRESSURISED EQUIPMENT.Suitable for Satellite wellhead installations due to limited source of ignition.

COLD MEANS “WITHOUT FLAME”

COLD VENT – CRITERIA (TYPICAL)

H2S should be

less than 0.5 %

& molecular wt.

should be less

than 60

Velocity should

be greater

than 150 m/s

Relieving temp

should be less

than auto Ignition

temp. of gas

being relieved

Vented volume

should be

less than

8.5 MSm3/Yr

Gas

Concentration

Should be less

than 100% LFL

In case of

accident Ignition,

radiation should

be less than

1500 btu/hr/sqft

Cold Vent


FLARE = DISPOSAL SYSTEM

DESIGNED TO BURN

GAS

1. Combustion of hydrocarbon converts in to less

objectionable & less harmful compounds.

2. Elevated flares assist in gas dispersion.

3. Elevated flares generally have lower radiation

level.

4. Elevated flare are preferred if effluent are

acidic/toxic.

WH

EN

/ WH

Y

WIND SOCK

FLARE LINE

VENT & FLARE (Cont’d)


INSTRUMENT & FUEL/UTILITY GAS

To instruments

To Turbo generator

To Well head control panel

To Other consumers

To Closed Drain

FilterElements

Mesh pad/Vane pack

Condensate

From Pipeline

Bypass

Instrument gas filter/separator

Remember !!

Should be tapped off from top of the vertical riser, down

stream of launcher to avoid any problems arising out of

sudden change in composition when NEW WELL comes on

line.

Instrument & utility gas system should be separate in order

to avoid liquid carryover in instrument gas system when

demand for utility gas is very high.


DRAIN SYSTEM

CLOSED DRAIN OPEN DRAIN

1. RECOVERY OF HYDROCARBONS FROM EQUIPMENTS & PIPING FOR MAINTENANCE AND PRIOR TO LONG TERM SHUTDOWN.

2. LIQUID FROM SUMP TANK VIA SUMP PUMP DISCHARGE.

1. COLLECTION OF RAIN WATER & WASH WATERFROM HAZARDOUS AND NON-HAZARDOUS AREA

2. ANY OTHER OPEN DRAIN FROM PLATFORM.3. A PUMP WILL DISCHARGE TO DISPOSAL TUBE

OR OVER BOARD SUBJECT TO COLLECTED WATER BEING FREE OF HYDROCARBON.

OPEN AND CLOSED DRAIN SYSTEM


INJECTION PUMP

CHEMICAL INJECTION SYSTEM

Corrosion Inhibitor

Methanol Prevent Hydration

Prevent Corrosion


Well Head

Installation


Upper Deck

Lower Deck

Sump Tank Deck

Boat Landing

Jacket

Deck


Jacket Installation


Jacket Installation (Cont’d)


Deck Installation


Deck Installation (Cont’d)


Well Head

Platform

VisitService Boat


Well Head Overview


Pedestal Crane

Vent Boom

Vent Tip


Export Line to Sea Line


Closed Cycle Vapor

Turbo-Generator (CCVT)

Corrosion

Inhibitor

Storage Tank


Sump Tank

Corrosion

Inhibitor

Storage Tank


Helideck

Netting


Boat Landing

Boat Impact


Christmas Tree


Pig Launcher


Personnel Protection


Open Drain System


ESD Hand Switch


Flashing Light


Liferafts


Portable

Extinguisher


ENDEND

basic whp presentation(1)

Engineering

thai nippon steel engineering

typical wellhead platform

gas detection system

processing facilities

wellhead fluids

drain system

typical whpprocess system

safeguarding facilities