Patent ID: 8316948

Claim:
A riser connection assembly comprising: a receptacle adapted to be set in a riser; a pin member having a profile on its exterior and adapted to be coupled to another section of the riser; a plurality of bores extending through a sidewall of the receptacle and spaced circumferentially around the receptacle; and a plurality of dog assemblies each mounted in one of the plurality of bores of the receptacle and comprising: an elongate actuation rod having an axis, a dog on an inner facing end of the actuation rod and having a profile corresponding to the profile on the pin member; an outwardly facing shoulder on the rod that is coaxial with the axis; a sleeve circumscribing a portion of the rod and threadingly affixed to the receptacle, so that when the sleeve is rotated in a first direction, an end of the sleeve abuts the shoulder to axially move the actuation rod, that in turn moves the profile on the dog into engagement with the profile on the pin member to couple the pin and receptacle, and an end cap selectively affixable on an outer end of the actuation rod, so that when the sleeve is rotated in a direction opposite the first direction, the end of the sleeve abuts the end cap to move the actuation rod, that in turn moves the dog out of engagement with the profile and uncouples the pin and receptacle.