CLOSURE MECHANISM WITH INTEGRATED ACTUATOR FOR SUBSURFACE VALVES

摘要

A subsurface safety valve has a closure sleeve (122) or rod (38) mounted bel ow the closure mechanism. Control signal pushes the sleeve up (uphole) or down (downhole), whichever is applicable, which causes the closure element (10) t o rotate (or slide, or otherwise translate) to its open position. A loss of control signal allows the closure spring (24) to push the sleeve or rod downhole (or uphole, whichever is appropriate). This movement causes the closure element to be driven to its closed position against the seat.