Dynamic pipe coupling

Abstract

A dynamic pipe coupling for connecting the ends of two pipes so as to prevent axial separation thereof but which permits axial flexing therebetween. The coupling includes two coupling members, each of which is connectible at one end thereof to the end of one of the pipes. One member has attached thereto a ball-shaped portion and the other coupling member has a housing arranged to receive the ball portion thereinto. Further, the housing has an annular channel-shaped groove thereabout facing radially outwardly. The coupling includes a setting ring assembly mountable about the coupling members, with the ring having a portion with an internal surface for matingly engaging the rearward side of the ball and having another portion for receiving thereinto and radially surrounding at least that portion of the external surface of the other coupling member having the aforesaid annular recess. The ring carries generally radially movable wedges arranged for engaging in the groove upon actuation to thereby urge and hold the coupling members axially together. Means in the form of a hydraulically actuated radially movable annular seal is provided for urging the wedges radially inwardly into engagement with the aforesaid annular recess to thereby lock the tool together. Seals operated by line pressure are also arranged for sealing between the ball and the housing. In addition, other seals are provided for sealing between the ball and the ring and between the ring and the housing.

Dependencies are inferred from the claim text.