Standard Subsea Control Systems Brochure Oss Controls

User Manual: Standard Subsea Control Systems Brochure Resource Library

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Integrated offshore

offering for reliable,

high-quality, and capital-

efficient performance

Standard

Subsea

Control

Systems

Standard Subsea Control Systems

Through standardized processes, common core

components, and qualified, field-proven assemblies,

OneSubsea can deliver a complete control system

solution—from topside through subsea distribution to

subsea equipment mounted controls—within 12 months.

These highly configurable solutions are designed to bring

greater efficiency and reliability to subsea operations,

enabling project viability and helping you meet a range

of functionality requirements while driving downcapex.

Since 1999, OneSubsea has

designed and delivered more

than 900 subsea control

modules in more than 50

projects worldwide. Our control

system uses existing robust and

reliable technology, providing

the versatility and flexibility

your project requires to achieve

maximum capital efficiency.

The control system can be configured for

various projects:

■ cluster layouts, tiebacks, daisy chains,

and templates

■ shallow to ultradeep water

■ tree- and manifold-mounted controls

■ riser base, pipeline end manifold, or

pipeline end termination systems

■ short to ultralong stepout.

OneSubsea control systems have the highest

reliability in the market, delivering

■ reduced opex by minimizing interventions

■ significantly reduced deferred production.

A range of power and

communication architectures

is available:

■ AC or DC power for

longer reach and reduced

umbilical costs

■ various communication

options

● copper communication

(on power or separate)

● high-speed fiber

optics (FO)

● industry-leading

DSL-distributed

Ethernet communication.

Advantages Flexible Functionality

Quality Control

The QC requirements for our subsea control systems

are in accordance with API Specification 17F.

Our facilities are certified per API Q1, and our

strategic subcontractors are certified to ISO 9001.

Surveillance by independent competent bodies

facilitates preengineering of materials, which

enables preordering and, in certain cases, stocking

them to secure lead time and protect schedule.

Surveillance by customers is available during

factory-acceptance testing.

Materials

All material specifications used conform to

API 6A and API 17D and were chosen on a

component-by-component basis. Pressure-

containing components additionally conform

to DNV GL recommended practices (RP)

for steel forgings for subsea applications

(DNVGL-RP-0034). A range of standardized

material options is available based on

component criticality, manufacturability,

and environmental compatibility.

The standard subsea control system is built from a suite of preauthored quality control, material,

welding, and coating specifications that simplify and expedite our execution processes. OneSubsea

works with approved vendors to ensure that they can manufacture the required components, enabling

high confidence in quality and lead time.

The coating for controls equipment

is rated to temperatures up to

122 degF [50 degC]. A separate

procedure is available for

topside equipment. The standard

coating specifications give

the requirements for surface

preparation, selection of coating

materials, application procedures,

and inspection of protective

coatings to be applied on the

subsea control systems equipment.

CoatingWelding

Our welding procedure for subsea control systems

conforms to API 6A, API 17D, API 17F, API 17P,

and ASME B31.1. Adhering to proven, tested, and

repeatable processes enables OneSubsea to

■standardize welding specifications within and

across product lines and vendors

■provide a superior engineering design that

meets or exceeds industry specifications at

alower cost

■deliver increased value by enhancing the

product without incurring added costs.

Subsea

distribution unit.

FPSO

Wellhead Manifold PumpTree

Connection System

Manifold- and tree-mounted controls

■Subsea control module (SCM)

■SCM mounting base

■Subsea accumulator module (SAM)

■Downhole interface unit

■Electrical and hydraulic connections

■Various instruments

● Pressure and temperature

transducer

● Acoustic sand detector

● Pig detector

● Leak detector

● Corrosion monitor

● Erosion monitor

● Single-phase and

multiphase flowmeter

● Chemical injection

metering valve

Topside controls

■Master control station (MCS)

■Electrical power unit (EPU)

■Chemical injection unit (CIU)

■Hydraulic power unit (HPU)

■Topside umbilical termination

assembly (TUTA)

A Truly Unified Control System

Subsea distribution

■Umbilicals

■Umbilical termination assembly (UTA)

■Umbilical termination head (UTH)

■Subsea distribution unit (SDU)

■Communication distribution unit (CDU)

■Flying leads (FLs)

● Electrical (EFLs)

● FO (FOFLs)

● Hydraulic (HFLs)

● Steel tube (SFLs)

Electrical power unit. Master control station.

Subsea control module.

The SCM is configured to suit your specific

field requirements using field-proven designs

built from a suite of standard components. The

modular system approach enables customization

to meet your project needs. Extremely reliable in

design, OneSubsea SCMs provide market-leading

availability for subsea production fields with an

unparalleled response time.

The OneSubsea topside controls provide you

with a suite of equipment mounted on the

host structure to communicate with your

subsea infrastructure. The system interface

is user friendly and provides the control and

monitoring required for surface and subsea

installed equipment. It comprises five

main components:

■ MCS—fully redundant Linux®-based

operating system with full obsolescence

management, which supports all

relevant interfaces like the MCS and

distributed control system (DCS) interface

standardization (MDIS) to the DCS

■ EPU—fully redundant system that

provides conditioned AC or DC power

tothe subsea infrastructure

■ CIU—unit that provides a turnkey

solution on the chemical delivery

and distribution

■ HPU

■ TUTA.

Subsea Control Module Topside Controls

Subsea control module

and mounting base.

Electrical power unit.

Master control station.

SCM Specifications

Electronic reliability Dual redundancy

Hydraulic supply (dual), psi [bar]

Low pressure 3,000–5,000 [207–345]

High pressure 7,500–15,000 [517–1,034]

Functions Up to 32 hydraulic

Electrical power supply (dual), V 300–850 AC (689 nominal)

400–1,200 DC (1,100 nominal)

Electrical connection locations Top, bottom, or side

Communication Copper wire or DSL

Instrument interfaces API 17F (Level 1, 2, 3) and Intelligent

Well Interface Standardization

Downhole gauge interface card Integrated Schlumberger

Additional cards can be accommodated

The OneSubsea distribution system provides you with a fully integrated

subsea system to control, communicate with, and optimize your field.

It is made up of six main field-proven components:

■ Umbilicals—dynamic, static, and infield umbilicals can be supplied with

the required project configuration of tubes, hoses, electrical cables, and

fiber optics to simplify interfaces and reduce delivery time

■ UTA—supporting sizes B and D per the standard outlined by the

Umbilical Termination Size Reduction joint industry partnership,

with one to four hydraulic stabplates and electrical and fiber-optic

termination and distribution

■ UTH—umbilical termination head for direct connections of infield

umbilicals to subsea structures

■ SDU—modular design for up to 12 hydraulic stabplates with the

capability to mount CDUs or SAMs as well as electrical distribution

■ CDU—highly reliable communication distribution for FO and DSL

Ethernet communication, including power switching capabilities

■ Flying leads—various configurations for HFLs, SFLs, EFLs, and FOFLs

available to match the layout and connection requirements.

Subsea Distribution

Subsea distribution unit. Communication distribution unit.Umbilical termination assembly.

*Mark of Schlumberger.

Other company, product, and service names

are the properties of their respective owners.

Copyright © 2017 Schlumberger. All rights reserved. 17-OSS-275105

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Integrated offshore offering for reliable, high-quality,

and capital-efficient performance

Standard Subsea Control Systems