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 FacilitiesOverview 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
WHP
1
WHP
2
WHP
3
Riser
Platform
Central
Processing
Platform
Utility &
Living Qtrs
Platform
Bridge
Support
Tripod
Flare
Tripod
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 PlatformsOverview 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 SEPARATOR
To 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 ATMOSTPHERE
WITHOUT FLARING
COLD VENT = VENT HANDLING SIGNIFICANT FLOWRATE FROM
PRESSURISED 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.
W
H
E
N
/
W
H
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
Filter
Elements
Mesh pad/
Vane pack
Condensate
From Pipeline
B
y
p
a
s
s
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 WATER
FROM 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)

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Basic whp presentation(1)