EP 0038034 A3 19811104 - SAFETY VALVE MANIFOLD SYSTEM
Title (en)
SAFETY VALVE MANIFOLD SYSTEM
Publication
Application
Priority
US 13950280 A 19800411
Abstract (en)
[origin: EP0038034A2] A hydraulic safety valve manifold system for providing positive opening and closing of a surface-controlled, sub-surface safety valve in a subsea well, including a shut-off valve which prevents leakage of well fluids to the outside environment if a leak should occur in the safety valve or in hydraulic lines which are connected to the hydraulic actuator of the safety valve. A hydraulic control line is connected to the safety valve actuator through a normally closed shut-off valve, and this line is also connected to the actuator of the shut-off valve to hold both the shut-off valve and the safety valve open when the line is pressurized. The hydraulic line is also connected to an actuator of a variable volume accumulator to empty the accumulator when the line is pressurized. When pressure in the hydraulic line is relieved the shut-off valve closes and the accumulator accepts fluid from the hydraulic actuator of the safety valve to insure that the safety valve closes.
IPC 1-7
IPC 8 full level
E21B 34/16 (2006.01)
CPC (source: EP)
E21B 34/16 (2013.01)
Citation (search report)
- FR 2455230 A1 19801121 - FMC CORP [US]
- US 4193449 A 19800318 - LOCHTE GLEN E [US], et al
- GB 2047773 A 19801203 - FMC CORP
- US 4082147 A 19780404 - WOLFF DANNY K, et al
- US 3854695 A 19741217 - BAUGH B
- US 3142337 A 19640728 - POORMAN JR FRANK, et al
- US 2998070 A 19610829 - TAMPLEN JACK W, et al
- US 3763891 A 19731009 - STILTNER M
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0038034 A2 19811021; EP 0038034 A3 19811104; BR 8102183 A 19811013; CA 1156139 A 19831101
DOCDB simple family (application)
EP 81102711 A 19810409; BR 8102183 A 19810410; CA 372744 A 19810311