Equalizing subsurface safety valve with injection system
AssigneeCamco International Inc.
InventorDavid E. McCalvin
Life of this patent
Estimating the term…
Abstract
A pressure equalizing subsurface safety valve with a fluid injection system is provided. A fluid injection conduit is connected from a source of injection fluid, such as at the earth's surface, to the subsurface safety valve. A fluid flowpath is provided in the safety valve to transmit injection fluid from the fluid injection conduit to a longitudinal bore of the safety valve. The injection fluids are introduced into the longitudinal bore to resist corrosion of or other damage to the safety valve. The fluid may be injected into the longitudinal bore through a single port, or through a plurality of ports. The fluid injection conduit may also be used to equalize pressure above and below a closure member disposed within the safety valve prior to the opening of the closure member.
Claims35
A subsurface safety valve for controlling fluid flow in a well conduit, comprising:
- a body member having a longitudinal bore extending therethrough;
- a closure member mounted within the body member to control fluid flow through the longitudinal bore;
- a valve actuator disposed for movement within the body member and remotely shiftable to move the closure member between open and closed positions;
- a fluid flowpath disposed within the body member, the flowpath being in fluid communication with the longitudinal bore and a fluid injection conduit, the fluid injection conduit being in fluid communication with a source of injection fluid;
- and
- at least one testing device connected to the fluid injection conduit for checking the integrity of the fluid injection conduit, the testing device including a housing having a rupturable member disposed therein.
A subsurface safety valve for controlling fluid flow in a well conduit, comprising:
- a body member having a longitudinal bore extending therethrough;
- a closure member mounted within the body member to control fluid flow through the longitudinal bore,
- a valve actuator disposed for movement within the body member and remotely shiftable to move the closure member between open and closed positions;
- a fluid injection conduit connecting a source of injection fluid to the body member;
- a fluid flowpath disposed within the body member and in fluid communication with the fluid injection conduit;
- and,
- a lockout sleeve disposed within the longitudinal bore, the lockout sleeve having an inner bore for receiving a first end of the valve actuator, a fluid passageway in fluid communication with the fluid flowpath and the inner bore, and a shoulder having a first face, the fluid passageway being disposed in the first face, sealed by a seal and including an annular fluid passageway and a plurality of fluid injection ports, the annular fluid passageway being in fluid communication with the fluid flowpath, and the plurality of fluid injection ports being in fluid communication with the annular fluid passageway and the inner bore.
Dependencies are inferred from the claim text.