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Installation of Pipeline End Manifold (PLEM)
and Subsea Tie-In of Expansion Spools
Zamri B Ahmad Petroleum Management (PMU),
PETRONAS
© 2011 PETROLIAM NASIONAL BERHAD (PETRONAS) All rights reserved. No part of this document may be reproduced, stored in a retrieval system or transmitted in any form or by any means (electronic, mechanical, photocopying, recording or otherwise) without the permission of the copyright owner.
PETRONAS-PETRAD-INTSOK-CCOP
Deepwater Subsea Tie-Back Workshop 25 – 26th January 2011
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• INTRODUCTION
• Background Information
• Scope of Presentation
• INSTALLATION PRELIMINARIES
• Pipeline End Manifold (PLEM)
• Expansion Spools
• Installation Barge
• Final Assembly
• INSTALLATION PROCEDURE
• Pipeline End Manifold (PLEM)
• Expansion Spools
• Final Assembly
• CONCLUSION
OUTLINE
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Introduction Installation Preliminaries Installation Procedure Conclusion
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Pipeline End Manifold (PLEM):
• commonly used for subsea manifold to tie-in of underwater pipelines.
• used to comingle 2 or more pipelines together and eliminate the
need for additional risers.
INTRODUCTION:
Background Information Introduction Installation Procedure Installation Preliminaries Conclusion
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3
Introduction Installation Procedure Installation Preliminaries Conclusion
INTRODUCTION:
Background Information
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4
Introduction Installation Procedure Installation Preliminaries Conclusion
INTRODUCTION:
Background Information
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Installation of PLEM and expansion spools:
• require great precision
• sensitive to weather conditions
• high installation cost
INTRODUCTION:
Background Information Introduction Installation Procedure Installation Preliminaries Conclusion
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1. Installation of PLEM.
2. Installation of 2 expansion spools.
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INTRODUCTION:
Scope of Presentation
CPP
PLEM
MOPU 1
MOPU 2
10” 6km
16” 25km
Introduction Installation Procedure Installation Preliminaries Conclusion
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Designed Weight: ~ 70 MT
Dimension: 14m x 6m
Water Depth: 114ft (43.9m)
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INSTALLATION PRELIMINARIES:
Pipeline End Manifold (PLEM) Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PRELIMINARIES:
Pipeline End Manifold (PLEM) Introduction Installation Procedure Installation Preliminaries Conclusion
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Expansion Spool at Pipeline / PLEM Expansion Spool at PLEM / MOPU
16” diameter
Full Well Stream (FWS)
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INSTALLATION PRELIMINARIES:
Expansion Spools Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PRELIMINARIES:
Expansion Spools Introduction Installation Procedure Installation Preliminaries Conclusion
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DP DLB Lewek Champion
• 358 person accommodation
• 1 x 800MT main crane
• 2 x 30MT secondary crane
• Dynamic Positioning with 6 Azimuth thrusters (max thrust 378.7kN)
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INSTALLATION PRELIMINARIES:
Installation Barge Introduction Installation Procedure Installation Preliminaries Conclusion
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PLEM
Expansion
spool
Pipeline to CPP
MOPU Leg
Footing
Expansion
spool
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For future
expansion
INSTALLATION PRELIMINARIES:
Final Assembly Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PROCEDURE:
Pipeline End Manifold (PLEM)
PLEM
Pre-installation:
USBL
beacons
Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PROCEDURE:
Pipeline End Manifold (PLEM)
Barge setup for PLEM installation
Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PROCEDURE:
Pipeline End Manifold (PLEM)
PLEM footprint and debris survey.
Introduction Installation Procedure Installation Preliminaries Conclusion
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Stage 2 Stage 1 Stage 3 16
INSTALLATION PROCEDURE:
Pipeline End Manifold (PLEM) Introduction Installation Procedure Installation Preliminaries Conclusion
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Barge Set-Up for Pipeline /
PLEM Spool Installation
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INSTALLATION PROCEDURE:
Expansion Spools Introduction Installation Procedure Installation Preliminaries Conclusion
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Pipeline on an A Frame
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INSTALLATION PROCEDURE:
Expansion Spools
Lifting Riggings on Expansion Spool
Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PROCEDURE:
Expansion Spools
Stage 2 Stage 1 Stage 3 19
Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PROCEDURE:
Expansion Spools
Expansion spool tie-in to PLEM
Introduction Installation Procedure Installation Preliminaries Conclusion
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SPOOL PLEM
21 +/- 300mm
INSTALLATION PROCEDURE:
Expansion Spools
2
Introduction Installation Procedure
1
Installation Preliminaries Conclusion
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INSTALLATION PROCEDURE:
Expansion Spools
Expansion spool tie-in to pipeline
Introduction Installation Procedure Installation Preliminaries Conclusion
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Flange Protector Drawings
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INSTALLATION PROCEDURE:
Expansion Spools Introduction Installation Procedure Installation Preliminaries Conclusion
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Barge Set-Up for PLEM / MOPU
Spool Installation
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INSTALLATION PROCEDURE:
Expansion Spools Introduction Installation Procedure Installation Preliminaries Conclusion
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INSTALLATION PROCEDURE:
Final Assembly Introduction Installation Procedure
PLEM
Expansion
spool
Pipeline to CPP
MOPU Leg
Footing
Expansion
spool
Installation Preliminaries Conclusion
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Similar approach is used for deepwater installation.
However, the challenges are greater. Due to the depth;
• human divers are out of bound. Thus extensive use of ROVs
• high-accuracy beacons are needed for positioning.
• DP vessel are required as apposed to anchor handling.
CONCLUSION:
Introduction Installation Procedure Installation Preliminaries Conclusion
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THANK YOU
Introduction Installation Procedure Installation Preliminaries Conclusion