Valve with integral piston
AssigneeSchlumberger Technology Corporation
InventorsGary L. Rytlewski, David Carter Allensworth
Life of this patent
Estimating the term…
Abstract
A technique facilitates valve operations in many applications including well related applications. A valve utilizes a piston which moves along an arc. The valve has an outer housing and an inner housing spaced to create an arcuate pressure chamber which extends along the arc. A piston is mounted in the arcuate pressure chamber for movement along the arc. A hydraulic force or other force may be selectively applied directly against an end of the arcuate piston to shift the arcuate piston along the arc. In some applications, the piston comprises a cutting edge oriented to enable performance of a cutting operation.
Claims20
A system for use in a well, comprising:
- a well completion having a valve positioned to interact with a passage through the well completion, the valve comprising:
- an outer housing having an arcuate inner surface;
- an inner housing having an arcuate outer surface spaced from the arcuate inner surface to create a pressure chamber;
- and
- a single-piece piston slidably mounted in the pressure chamber, the piston having an arcuate shape extending between a piston end and a cutting edge such that sufficient buildup of hydraulic fluid pressure in the pressure chamber acts directly against the piston end to shift the piston and move the cutting edge across the passage in a linkage-free manner.
A system, comprising:
- a valve having:
- an outer housing with an arcuate inner surface and an inner housing with an arcuate outer surface, the surfaces defining a pressure chamber there between;
- and
- a single-piece piston slidably mounted between the arcuate inner surface and the arcuate outer surface for movement along an arc of a circular path in response to hydraulic fluid pressure directly against a piston end of the piston, the valve having a passage therethrough and the piston having a cutting edge opposite the piston end and oriented such that movement of the piston along the arc in a closing direction causes the cutting edge to move across the passage in a linkage-free manner.
A method for use in a wellbore, comprising:
- providing a valve with an outer housing and an inner housing spaced to create an arcuate pressure chamber extending along an arc formed as a portion of a circle;
- movably mounting a single-piece arcuate piston in the arcuate chamber for movement along the arc;
- and
- selectively applying a force through hydraulic fluid directly against an end of the arcuate piston to shift the arcuate piston along the arc in a linkage-free manner.
Dependencies are inferred from the claim text.