Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1997-06-04
1998-11-17
Schoeppel, Roger
Wells
Valves, closures or changeable restrictors
Fluid operated
166324, 175218, E21B 3304
Patent
active
058363955
ABSTRACT:
A new valve has been invented, in some aspects useful in wellbore operations and/or as a mud saver valve which valve has a body through which fluid is flowable, a valve seat connected in and to the body and through which fluid is flowable, a valve member positioned adjacent the valve seat and selectively movable to seat against the valve to close the valve to fluid flow and selectively movable away from the seat to open the valve to fluid flow, and at least one recess on the valve member for holding debris and thereby preventing the debris from inhibiting valve closure. A new valve has been invented useful as stated above with a body through which fluid is flowable, a valve seat connected in and to the body and through which fluid is flowable, a valve member positioned adjacent the valve seat and selectively movable to seat against the valve to close the valve to fluid flow and selectively movable away from the seat to open the valve to fluid flow, and at least one recess on the valve seat for holding debris and thereby preventing the debris from inhibiting valve closure. Wellbore methods and operations have been invented using a valve as described above, which method in one aspect includes operation of a circulating head and wherein the valve is a mud saver valve assembly.
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McClung Guy
Schoeppel Roger
Weatherford / Lamb, Inc.
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