production control system for a submerged well and method for deactivating a production control system for a submerged well

摘要

production control system for a submerged well and method for disabling a production control system for a submerged well. It is a production control system for a submerged well comprising: first electrically operated means (16) for supplying the first hydraulic fluid, for opening a first well control valve (18); second electrically operated means (22) for supplying the second hydraulic fluid at a higher pressure than said first fluid for opening an additional well control valve (23); electronic circuits (semi) for providing electrical energy to operate said first and second means; and means for controlling the closing sequence of said control valves as a consequence of a loss of electrical energy from said electronic circuits. the control means comprises: electric energy storage means (4); sensing means (9) responsive to said energy loss from said electronic circuits; and means (7, 8) coupled with said sensing means for using electrical energy from said storage means to keep said additional control valve open for a period after closing said first control valve and closing it. it after that period.