Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate
2007-04-20
2009-11-17
Bomar, Shane (Department: 3676)
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
C166S334100
Reexamination Certificate
active
07617875
ABSTRACT:
A device for shifting a sliding sleeve. The sliding sleeve is concentrically positioned within a well, and wherein the well is in communication with a hydrocarbon reservoir. In the most preferred embodiment, the device comprises an outer housing forming an annulus with the well and a power piston slidably disposed within the outer housing. The power piston includes an upper shoulder configured to form an annular chamber and a tubular chamber relative to the outer housing, a lower shoulder configured to form an atmospheric chamber relative to the outer housing. The device further comprises a first latch for preventing upward movement of the power piston, a second latch for preventing downward movement of the power piston, and wherein movement of the power piston shifts the sliding sleeve.
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Halliburton Brochure—Subsurface Flow Control Systems—section 6, pp. 30-33.
BJ Services Company Brochure—Multi-Service Valve Product Information (2 pages).
Darnell William J.
Lane Bryan
Livingston William Tyler
Wong Andrew Wee-Mien
Bomar Shane
Buskop Wendy
Buskop Law Group PC
PetroQuip Energy Services, LLP
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