Wells – Processes – Disassembling well part
Reexamination Certificate
2007-05-22
2007-05-22
Bagnell, David (Department: 3672)
Wells
Processes
Disassembling well part
C166S378000, C166S332400, C166S066700, C166S105000
Reexamination Certificate
active
10931606
ABSTRACT:
A system and method for actuating a shut-off valve in a wellbore wherein the shut-off valve element can be positively closed before the pump is removed from the well. A hydraulic actuator component is operably associated with the shut-off valve to provide for selective isolation of the well by positive closing of the valve prior to removal of the pump and opening of the valve after replacement of a pump within the wellbore. The hydraulic actuator component has a balanced hydraulic design wherein the valve closure element may be moved toward an open or closed position by flow of hydraulic fluid through first and second hydraulic lines. When a repaired pump or replacement pump is placed into the well, the actuator is stabbed into a packer element to seat it. The hydraulic actuator assembly is then operated to open the shut-off valve, thereby reestablishing well operation.
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Chavers Raymond D.
Cobb John
Gomez Alfredo
Wolters Sebastiaan J.
Bagnell David
Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Smith Matthew J.
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