4_enger_vetco_subsea_power

Vetco 060706 -1-

Petrobras

Emerging Technologies,

Subsea Power Systems

Possibilities for piloting in Brazilian waters with focus on subsea to shore technologies Rio de Janeiro - September 14, 2006

Eric Enger / Svend Rocke

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Vetco International - structure

Vetco Gray Inc.

Vetco International Ltd.

Vetco Aibel AS

Drilling & Production

EquipmentSubsea Systems Technology &

Products

Maintenance,

Modification

and Operation

Revenue 2004: 1.7 BUSD

Process &

Facilities

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Gas

Oil

Power

Control

Chemicals

� Going for Long Distance Subsea tiebacks

� Going into deeper waters

� Going for mutiple consumers(Clusters)

� Going for larger consumers

Thus

� More electric power required

� Higher voltages AC

� Higer currents

� DC-transmission

Hence

There will be a demand for further development of

subsea electrical components and systems.

Trends


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Subsea Power Systems, driver:Subsea Processing

LTVIEC LOWACC

TT TT TT TT

TT

PT

PTPTTT

TT

V4 Sand Flushing System

XYXY

Water Injection Pump

5 x LP Hydraulics

HV Power

2 x PROFIBUS Loops

Electrical line

Hydraulic / fluid line

FT QT

PT

V3

V2Emulsion Breaker

V1

Barrier fluid Supply

V5 Sand Extraction

Methanol

Scale Inhibitor

LV Power

Sand monitoring

QM

Compressor

Booster Pump

2 x Power for control


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� Power range:

� Control Power 3-10 kW

� Power for Subsea Pumps 1,5-2,5 MW

� Power for Subsea Compressors 6- 13 MW

� Power for total distribution systems 20-150 MW

� Frequency range:

� Control power selected single freq. 50/60 Hz

� Pumps 0-85 Hz

� Compressors 0-250 Hz

� Distribution systems selected single freq. 50/60 Hz

� Voltage drop at full load vs.”0” load at given distance

� Control power - 50% (1:2)

� Pumps/compressors Generally accepted - 10%

� Distribution systems Generally accepted - 5 %

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Topside

FrequencyConverter

Topside Step-upTransformer

TopsideStep-downthree-windingtransformer

Subsea PowerCable

HV wet mateableconnector

AC Electrical PumpMotor

Typical solutions

Pump motor wetmateable connector

Subsea frequencyconverter

AC Electrical PumpMotor

HV wet mateableconnector

Subsea PowerCable

Topside Step-upTransformer

Topside

SEPDIS IISEPDIS I

Subsea CircuitBreakers

High voltagedistrictuion

Pump motor wetmateable connector

Subsea frequencyconverter

Ultra HV wetmateable connector

Subsea PowerCable

Topside Step-upTransformerTopside/Onshore

Subsea step-downtransformer

Topside VSD Subsea VSDSubsea distribution

and subsea VSDs

Wet and/or dry-mate

connection.MECON/Penetrators

Subsea VSDSubsea Transformer

Subsea Switchgear


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Subsea transformer

module

Subsea power

cable/umbilical

Base frame

High voltage wet

mate connector

SEPDIS

Control System

Subsea frequency

converter


Generic Design

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��MECONMECONTMTM ,wet mate-able connector system

��MECONMECONTMTMMrk I- 12kV/300A/ 350mWD, Field proven

�Project :Troll Pilot

�4 year in full operation (5 years submerged)

�Several installations, 10hrs deck to deck

�Installation/Flushing tool ROV carried RFS

Water Injection Pump

RFS

MECON

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Technical DescriptionTechnical Description

Main AssembliesMain Assemblies

�� PullPull--in Tool (PIT)in Tool (PIT)

�� HV Motor FeederHV Motor Feeder

�� MiniMini--SpoolSpool

�� ROV Flushing Skid (RFS)ROV Flushing Skid (RFS)

�� HangHang--off Tableoff Table

�� HV Termination w/Pull CapHV Termination w/Pull Cap

MECONMECONTM TM

Mrk IMrk ISubsea Power Systems

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Technical Description Mechanical

�� HV Motor FeederHV Motor Feeder

�� MinMin--Spool w/ Metal SealsSpool w/ Metal Seals

�� HV Cable TerminationHV Cable Termination

MECONMECONTMTM


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“OPEN” Contacts “CLOSED” Contacts

MECONMECONTMTM


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MECONMECONTMTM ,wet mate-able connector system,

12-24-36 kV/500A/ 1500mWD rating

Qualification program successfully completed

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The MECON Family

Mrk I, Troll Pilot

12kV/300A

Mrk II, Jumper

termination

17-24-36 kV/500A

Male

MaleMale Male

Female

Female

Female

Female

Use of existing flushing

skid, RFS 350 meters

New single line

flushing skid,

1500metres

Horizontal access

required

Mrk II, Next

Generation

12-24-36 kV/500A

Vertical access

enables free

positioning on

structure.

1500 mWD design

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ABBOS Cable Termination and Penetrator System (Patented)

�Penetrator System, Cable Termination


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�Cable termination and Penetrators systems

� Qualified according to IEC and Norsk Hydro/Statoil specification

IEC rating

[kV]

Uo/U(Um)

Current

rating

[A]

Water

depth

[m]

Max dif.

Pressure

motor

side [bar]

Max dif.

Pressure

water side

[bar]

3.6/6(7.2) 600 1250 345 125

6/10(12)* 240 500 207 50

6/10(12) 600 1250 345 125

12/20(24) 600 2000 100 200

18/30(36) 700 2000 100 200

* In operation on Troll Pilot

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� A complete and flexible module arranged on a support structure with connection points for umbilical/power cable

� For control of electrical power supply and protection of other power equipment in case of abnormal conditions

� Four switches each 24 kV/500A

� Connected through MECON 24kV/500A

� Full size “dummy” built and tested

Subsea Power Systems, Subsea Switchgear Module


L = 8.8 m

Wt= 33 t

H= 3.7 m

W = 3.8 m

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� Subsea transformers, typcal design

� Inner tank, volume compensated by flexible metal

� Outer tank, volume compensated by sealed gas compensators.


Double barrier system, long time high reliability.

Easy, short time connection on site.

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��SEPDISSEPDIS®® ,

� Qualification of 3,5 MVA Subsea Frequency Converter completed

� Design of generic Subsea Electrical Power Supply System

� 7 MUSD, 6 year JIP successfully completed.

Qualification objective:

�Verification of electrical functionality

�Prove long term stability and verify reliability

�Establish the Overall Thermal Capacity

�Verify the redundant remote control system and

LV power supply

�Verify the integrity of:

�Liquid, Nitrogen and Oil cooled compartments

�Inter-compartment sealing

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Main Circuit Breaker

TRANSFORMER

DC-BANK

INVERTER


Prototype Assembly

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��SEPDISSEPDIS®®, 15 MVA Subsea Frequency Converter

Proposed solution for Subsea Frequency

Converter for the Ormen Lange Subsea Gas

Compression project

�Basic design performed

�Preliminary calculations performed,

�Subsea layout, Installation and operational

aspects evaluated.SPECIFICATION

�15 MVA (12,5 MW)

�12-33kV input voltage

�6 kV output voltage

�200 Hz

Subsea Electric Power Distribution, Achievements

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� Subsea HVDC Light Converter might look like

A subsea 160 MVA system

is preliminary estimated to 3

500 m3 -250 metric ton.

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�Troll Pilot, Power supply for water injection pump� Topside frequency converter

� Combined power and control dynamic Umbilical

� 12kV wet mate connector, MECON Mrk I

� 12 kV Penetrator system for motor feeder

� Closed loop level control of gravity separator

� Field Proven


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Production Control

System Overview

The Snøhvit

Project

CDU1

G

DEF

Snøhvit

160 km*

Albatross

N

11.7 km

3.3 km3.2km8.3 km

Askeladd

CDU2

34 km**

J

L

K5.8 km

14.8 km

2.3 km

Hammerfest

* Design distance for communication system: 176 km

**Design distance for communication system: 44 km


Vetco 060706 -24-

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Ormen Lange development project, system overview

Main system components

�Combined power and control umbilical incl. field joints (alt. separate power cable and control umbilical)

�Termination assembly including main transformer sub-base structure (MTSS)

�145 kV penetrator

�Main transformer and associated pressure compensation system

Electrical transmission system data

�Design power 70 MVA

�Operational system voltage 120 kV

�Insulation class U0/U(Um) 76/132(145) kV

�Rated system frequency 50 Hz

�Number of phases 3

Vetco 060706 -25-

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Subsea Power SystemsOrmen Lange Subsea Gas Compressor Pilot project

Artist view of subsea layout

Power from shore

145kV power cable and “dry-mate” termination and penetrator system

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Subsea Power Distribution, Status

�NORNE, Separation and Water Injection

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Tyrihans study –

Raw Seawater Injection

Subsea Power Distribution, Status

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Possible Further Developments

� Down scaling to 0.3-0.5 MVA (ESP - Down hole Pumps)

� Larger Consumers - Gas Compressors (5-10MVA)

� High speed motors 85Hz

� Subsea Power Connectors

� Higher Voltage for long tie-backs

� Circuit breaker for 12kV

� HVDC light

� Ultra long tie-backs

� Ultra large consumers

SEPDISSEPDIS®® TrendsTrends

Vetco 060706 -29-

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Subsea frequency

converter

(40Hz ~ 70Hz)

Subsea step-down

transformer

(13,8kV – 4260V)

SEPDIS IIISEPDIS II

Pump motor wet

mateable connector

Ultra HV wet

mateable connectorSubsea Power Cable

Topside Step-up Transformer

(13,8kV)Topside/Onshore

SEPDIS IV

Subsea Circuit Breakers

High voltage distribution

SEPDIS I

Pump motor

1,2 MW

SEPDISSEPDIS®® TrendsTrends

Several consumers - ESP

De-bottleneck turret

Vetco 060706 -30-

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Eric Enger

Business Development Manager

Subsea Processing

Tel.: +55 11 3688-9491

Cel.: +55 11 9652-1583

E-mail: [email protected]

Documents

4_enger_vetco_subsea_power