Subsea STP Buoy Mooring

Transcription

1 Subsea STP Buoy Mooring Subsea Australasia 2010, Perth Ben Crouch, Sales Engineer, First Subsea Ltd Always Part of the Solution

2 Presentation Overview First Subsea Ball and Taper Technology Subsea Mooring Connector Spar, FPU and FPSO Mooring STP Buoy Mooring Buoy Tow-Out and Connection Buoy Disconnection and Retrieval Peregrino case study Future STP Buoy Mooring Summary

3 First Subsea Formerly BSW Ltd Established in 1994 MBI in September 2001 Patented Ball & Taper Technology Innovative Design & Engineering Extensive Oil and Gas Experience Employing 40 People in NW England Certified QMS to ISO9001:2000 Representative ti Worldwide Australian representative: Brian Arnold, Energy Agencies.

4 Ball and Taper Principle Mechanical Mechanism Friction / Wedge Locking Individual Multi-Point Grip Grip Elements in Compression Grip is Proportional to Load Self Aligning, Self Activating No Release Under Load Fully Scaleable Design: Mooring Connector, Diverless Bend Stiffener Connector, Pipeline Recovery Tool, Autoswage Connector

5 Subsea Mooring Connector Two-part Ballgrab SMC: male and female connectors Range of connectors to meet loading requirement: Series I, II & III Loads up to 2000Te MBL supplied so far Mooring line media independent: chain, spiral wire and fibre rope Shallow water and deepwater deployment

6 Subsea Mooring Connector Over 250 Ballgrab subsea mooring connectors deployed around the world. Ballgrab SMC: Simpler and safer connection Greater operational flexibility Easier shallow and deepwater installations Key projects: Vincent STP buoy, Kikeh SPAR, Perdido Spar, Cascade Chinook.

7 Spar, FPU, FPSO mooring Pre-install female connector on seabed connected to pile and ground chain Suction pile - Docking porch with female connector Driven pile Mud mat with female connector Male connector lowered from surface vesselconnected to mooring line Male connector stabbed vertically into female connector to secure mooring line connection Male connector can be disengaged d enabling production platform to be moved, if necessary.

8 STP Buoy Mooring and Connection Reverse implementation to surface platform mooring: male preinstalled seabed anchor, female preinstalled on buoy with uni- joint arrangement Male installed with suction pile, held above seabed with midline buoyancy element Buoy lowered into position and male connector pushed into female connector with ROV diverless connection Female connector typically held at 45 degrees.

9 Buoy Tow out Simpler Female connector pre-installed on side of buoy Avoids need for mooring lines pre- connected to buoy Easier buoy lift from quayside to water Enables safer tow out Fewer tow out boats needed Allows final mooring line connections without the need for divers.

10 Buoy Disconnection and Retrieval FPSO disconnects buoy and moves off-station to avoid adverse weather Integrated ball and taper connection within buoy allows easier retrieval Female receptacle within top of buoy Buoy retrieved into FPSO with Ballgrab male connector on retrieval wire Doppler TV used to position male connector and assist female connection On connection, buoy winched into moonpool Alternative to floating ropes, padeyes and shackles Easier retrieval of buoy without ROV / divers Provides simple, remotely operated buoy abandonment and retrieval system.

11 Future STP buoy mooring Subsea STP buoy mooring a proven methodology Focus on meeting deepwater / ultra deepwater mooring challenges Drive for Lean Installation Key developments in mooring line make-up and deployment Fibre rope connector technology Mooring line seabed pre- deployment.

12 Mooring Line Developments Deepwater mooring line deployment complex and time consuming Need dedicated deepwater mooring lines Longer ropes with fewer connections Easier and quicker deployment and recovery Focus on Lean Installation LankoFirst fibre mooring line connector Smaller, lighter, stronger and more efficient than existing link designs Easier make-up and slimmer rope splice construction Flexible, safer and easier offshore assembly, running and retrieval.

13 Summary Subsea STP buoy mooring simpler with Ballgrab SMCs Consistent with Lean Installation Simpler buoy lift and tow-out Easier buoy retrieval Further developments in mooring line connectors, and fibre rope sand barriers offer greater STP buoy mooring flexibility.

14 The innovator of engineering excellence, specializing in connection and mooring solutions Engineering House, Lune Industrial Estate, New Quay Road, Lancaster, LA1 5QP, UK. UK T : +44 (0) F : +44 (0) E : sales@firstsubsea.com Katy Freeway, Suite 1300, Houston, Texas 77079, USA. US T : F : E : sales@firstsubsea.com