Bi-stable actuator and drilling system including same

Details Bi-stable actuator and drilling system including same Bi-stable actuator and drilling system including same

F - Mech Eng,Light,Heat,Weapons

15

B

F15B 9/09 (2006.01) E21B 7/04 (2006.01) F15B 13/044 (2006.01) F15B 15/02 (2006.01)

Patent

CA 2613876

A bi-stable actuator comprises a chamber 40 having a fluid inlet 34 and first and second fluid outlets 36, 38, a valve member 42 movable between a first position in which it co--operates with a first seat to close the first outlet 36 and a second position in which it co-operates with a second seat to close the second outlet 38, and an electromagnetic actuator 48 operable to drive the valve member 42 between its first and second positions, wherein the valve member 42 has a first surface 44 against which the fluid pressure within the chamber 40 acts when the valve member 42 is in its first position to resist movement of the valve member 42, and a second surface 46 against which the fluid pressure within the chamber 40 acts when the valve member 42 is in its second position to resist movement of the valve member 42.

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