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US 2009/0266557 A1Published application
Flapper valve retention method and system
AssigneeSchlumberger Technology Corporation
InventorsPaul G. Goughnour, David James Biddick
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AssigneeSchlumberger Technology Corporation
InventorsPaul G. Goughnour, David James Biddick
Estimating the term…
A system for use in a wellbore that includes a string comprising a housing. The housing comprises a valve including a valve seat having an inner channel and a flapper configured to pivot relative to the valve seat between a first position and a second position in which the inner channel is obstructed. A valve actuating device may be provided for selectively opening the valve and comprising a first hydraulic device. In addition, a retention device including a second hydraulic device may be provided and configured to selectively retain the flapper in the first position. In some cases, the first hydraulic device and the second hydraulic device may be driven by the same fluid source.
A system for use in a wellbore, comprising:
A method for controlling wellbore fluids in which a well comprises a string having a housing containing a valve in which the valve comprises a valve seat having an inner channel and at least one flapper configured to pivot between a first position and a second position relative to the valve seat, the method comprising;
A valve for use in a wellbore comprising:
Dependencies are inferred from the claim text.