SINGLE WELL PLATFORM CONTROL SYSTEM

FOR RAVVA FIELD, INDIA

THE RAVVA FIELD’S TWO OFFSHORE PLATFORMS WERE CONTROLLED MANUALLY WHEN COMMAND PETROLEUM TOOK OVER THE FIELD FROM ONGC. USING ’S SCADA AND WELL HEAD CONTROL SYSTEMS, THE FLOWS FOR THE WELLS ARE CONTROLLED AND MONITORED AT AN ONSHORE CONTROL ROOM 6KMS DISTANT AT THE SHORE BASE.

PLATFORM CONTROL DECK WITH CONTROL CABINETS

RAVVA FIELD LAYOUT

THE SYSTEM MAKES USE OF ’S VERY HIGH RELIABILITY COMMUNICATIONS LINKS TO CONTROL THE PLATFORM WITH A SPURIOUS SIGNAL REJECTION RATE OF AT LEAST 10 16 DATA EXCHANGES.

THIS ENSURES THAT THE RELIABILITY OF CONTROL FOR PLATFORM SHUTDOWN IN CASE OF EMERGENCY IS EXTREMELY HIGH.

SUPPLIED THE ELECTRONIC CONTROL SYSTEM ON THE PLATFORM, TOGETHER WITH THE HYDRAULIC SYSTEM TO OPERATE THE VALVE ACTIVATORS. DATA IS SENT FROM THE PLATFORMS VIA AN INTRINSICALLY SAFE RADIO LINK.

THE CONTROL STATION USES ’S SCADAPLUS SOFTWARE AS THE SUPERVISORS INTERFACE. THE SYSTEM PROVIDES SEQUENCED PROCESS AND EMERGENCY SHUTDOWN LOGIC TO CONTROL THE SUBSEA, MASTER AND WING VALVES OF THE WELL HEAD. AN ENHANCEMENT ALLOWS THE CHOKE VALVES TO BE VARIED TO ADJUST THE FLOW OF CRUDE PRODUCT.

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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