초록 ▼

An improved tubular joint between two tubular members having their mating ends with inner sealing surfaces tapering outward in the direction toward the other tubular member and with a sealing ring having outer sealing surfaces for engaging the inner sealing surfaces of the tubular members. The impro

An improved tubular joint between two tubular members having their mating ends with inner sealing surfaces tapering outward in the direction toward the other tubular member and with a sealing ring having outer sealing surfaces for engaging the inner sealing surfaces of the tubular members. The improvement lies in the provision of an insert sleeve having a tapered portion and a tubular portion, the insert sleeve is cold forged in place over a damaged sealing surface of one of the tubular members and has a tapered inner sealing surface for sealing with the outer surface of the sealing ring. This improved joint is particularly useful in subsea wellheads. The tight gripping and sealing engagement of the insert sleeve within the tubular member is augmented by grooves within a recess on the interior of the tubular member being repaired or sharp annular teeth around the exterior of the tubular portion of the insert sleeve. In a modified form of the invention, the insert sleeve includes external sharp teeth which when cold forged into a housing recess will dig into the recess surface to provide the tight gripping and sealing engagement. Further a test port is provided to determine the effectiveness of the sealing engagement of the insert sleeve within the housing.

대표청구항 ▼

A tubular joint comprising a first tubular member having a central bore and a sealing surface tapering outwardly at one end of said member, a second tubular member having a central bore and a sealing surface tapering outwardly at the end of said member facing said one end of said first tubular membe

A tubular joint comprising a first tubular member having a central bore and a sealing surface tapering outwardly at one end of said member, a second tubular member having a central bore and a sealing surface tapering outwardly at the end of said member facing said one end of said first tubular member, a recess on the interior of at least one of said tubular members extending axially inward from the inner end of the sealing surface of such tubular member, said sealing surface on said at least one of said tubular members being damaged, a seal ring having a cylindrical bore and outer sealing surfaces being tapered for sealing between the sealing surfaces of the two tubular members, means for securing said first and second tubular members together with said seal ring in sealing engagement with their respective sealing surfaces, and an insert sleeve having a tubular portion positioned within said recess in the tubular member with the internal recess and a frusto-conical portion extending outwardly both axially and radially into covering relationship to the sealing surface of said tubular member, the insert sleeve being cold forged into tight sealing engagement within said recess and with the sealing surface of said tubular member, the inner surface of said frusto-conical portion of said insert sleeve having a taper mating with the taper of the seal ring whereby when said joint is held in tight engagement by said securing means said sealing ring sealingly engages the sealing surface of the tubular member which was not damaged and the sealing surface of said insert to provide a joint seal between said members.