Patent ID: 9506300
Filing Date: 2016-11-29
CPC Classification: E21B

Claim Text:
1. A slip joint, comprising: a tubular inner barrel; a tubular outer barrel, the inner barrel lying at least partially within the outer barrel; at least two sealing assemblies, each sealing assembly being operable to provide a substantially fluid tight seal between two sealing surfaces, the two sealing surfaces comprising an interior surface of the tubular outer barrel and an exterior surface of the tubular inner barrel, each sealing assembly including an actuator and a seal, the actuator being movable to push the seal into engagement with one of the sealing surfaces, the at least two sealing assemblies being displaced with respect to one another generally parallel to a longitudinal axis of the inner and outer tubular barrels, and mounted in a housing on the outer tubular barrel, wherein, a fluid flow passage is provided in the housing, the fluid flow passage providing a flow of a fluid from the exterior of the housing into the space between the inner and outer tubular barrels and between the two seals, the slip joint includes three sealing assemblies displaced with respect to one another generally parallel to a longitudinal axis of the inner and outer tubular barrels, each of the sealing assemblies being operable to provide a substantially fluid tight seal between two sealing surfaces comprising an interior surface of the outer tubular barrel and an exterior surface of the inner tubular barrel, and the sealing assemblies are mounted in a housing on the outer tubular barrel, there being a first fluid flow passage and a second fluid flow passage in the housing, the first fluid flow passage providing a first flow of the fluid between the exterior of the housing and into the space between the inner and outer tubular barrels and between the two seals of the first and second sealing assemblies, and the second fluid flow passage providing a second flow of the fluid between the exterior of the housing and into the space between the inner and outer tubular barrels and between the two seals of the second and third sealing assemblies.