RISER LEAK DETECTION FOR TURRET MOORED FPSO

SHELL’S MAUI-B FLOATING PRODUCTION AND STORAGE VESSEL HAS FLEXIBLE RISER PIPELINES TO THE SEABED STATIC FLOWLINE. THE VESSEL ROTATES AROUND A TURRET MOORING CONTAINING THE PIPELINE SWIVELS.

THE LEAK DETECTION SYSTEM MONITORS FOR GAS LEAKAGE FROM THE RISERS AND TOPSIDE CONNECTIONS. AS THE AREA AROUND THE TURRET IS AN EXPLOSIVE ATMOSPHERE, ALL EQUIPMENT IS CERTIFIED.

FPSO TURRET AND RISERSFPSO DECK AND TURRET TOP SECTION

THE RISERS ARE DOUBLE SKINNED SO THAT ANY LEAKAGE FROM THE HOSE IS CONTAINED IN THE ANNULAR SPACE AROUND THE HOSE. THE LEAK DETECTION SYSTEM MONITORS THE GAS FLOW IN THE ANNULUS AND PRESSURE RISE TO TRIGGER AN ALARM.

THE DATA FROM THE SENSORS IS TRANSMITTED TO THE VESSEL VIA AN RADIO TELEMETRY SYSTEM. THE TELEMETRY SYSTEM IS CERTIFIED EXD ( EXPLOSION PROOF) FOR HAZARDOUS AREAS. ON THE VESSEL THE DATA FEEDS INTO THE MAIN DISTRIBUTED CONTROL SYSTEM AND PROVIDES ALARMS ON THE FPSO AND THE MAUI-B PLATFORM.

THE POWER FOR THE LEAK DETECTION SYSTEM IS PROVIDED BY A SOLAR POWER PACK ON THE TURRET, WHICH IS ALSO HAZARDOUS AREA APPROVED.

Ocean Technical Systems Ltd.
P.O.Box 752, Sutton, Surrey, U.K. SM2 7RQ
Tel: +44 (020) 8643-2233 Fax: +44 (020) 8643-6444
e-mail: oceantech@oceantechsys.com


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