Merlin drilling riser assembly

摘要

An improved drilling riser assembly including a male drilling riser assembly section and a female drilling riser assembly section that form a connection joint when mated. The drilling riser assembly sections having an internal stab type main drilling riser connector. The drilling riser assembly sections each have main drilling riser flanges that have helically threaded rings on an outer edge of the flange. A box and pin connector each have an inner helically threaded ring that mates with the outer helical flange ring of a drilling riser assembly section. The box and pin connectors extend towards each other and make up an enclosed compression joined mating section around the stab type connectors of the drilling riser assembly.

主权项

1. A drilling riser assembly for subsea well installations, the drilling riser assembly comprising:
a male drilling riser assembly section, comprising:
an internal stab type male main drilling riser connector,a main drilling riser flange having a helically threaded ring on the outer edge of the flange, anda box connector having an inner helically threaded ring configured to mate with the helically threaded ring on the outer edge of the flange and having a set of inward facing inter-engageable annular projections and grooves; and a female drilling riser assembly section, comprising:
an internal stab type female main drilling riser connector,a main drilling riser flange having a helically threaded ring on the outer edge of the flange, anda pin connector having an inner helically threaded ring configured to mate with the helically threaded ring on the outer edge of the flange and having a set of outward facing inter-engageable annular projections and grooves configured to engage with the inward facing inter-engageable annular projections and grooves of the male drilling riser assembly section box connector.