Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Patent
1998-05-29
2000-04-04
Neuder, William
Wells
Valves, closures or changeable restrictors
Longitudinally movable operator
277648, 277337, E21B 3414
Patent
active
06044908&
ABSTRACT:
A sliding sleeve valve for controlling fluid flow between a well annulus and a string of well conduit, the valve including a slidable sleeve disposed coaxially within an outer housing, the valve being provided with a primary seal member carried by the housing for sealing engagement with the housing and the sleeve characterized in that the primary seal member, in a relaxed condition, comprises an annular, monolithic body having a first, radially outwardly facing, annularly extending seal surface and a second, radially inwardly facing, annularly extending seal surface, the second seal surface having at least one annularly extending, radially inwardly projecting rib, the rib having a radially innermost convex portion when viewed in transverse cross-section, annularly extending reliefs being formed on axially opposite sides of the rib, the seal member being made of a substantially non-elastomeric material that has sufficient memory to provide an interference seal between the seal member and the housing, and the seal member and the sleeve.
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Grant Prideco, Inc.
Neuder William
Walker Zakiya
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