Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent
1984-04-09
1985-10-08
Novosad, Stephen J.
Wells
Submerged well
Connection or disconnection of submerged members remotely...
166353, 166355, 166362, E21B 1909
Patent
active
045454370
ABSTRACT:
Apparatus and method for use in drilling a well from a floating vessel by means of a riser, which connects the vessels drilling equipment to a wellhead assembly adjacent the ocean floor. The riser is capable of being disconnected from the wellhead assembly, and having its upper elements locked to the vessel. This allows the riser to be suspended from the floating vessel, or permits maintenance of the normal riser motion-compensating and tensioning equipment. Riser locking apparatus is employed which comprises selectively positionable moveable locking beams adapted to be remotely actuated to lock the upper elements of the riser to the vessel, thereby preventing lateral or vertical movement of the riser relative to the vessel after the lower end thereof has been disconnected from the wellhead assembly.
REFERENCES:
patent: 3717002 (1973-02-01), O'Brien et al.
patent: 4428433 (1984-01-01), Watkins
Neuder William P.
Novosad Stephen J.
Shell Offshore Inc.
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