Pipe joints or couplings – Safety release
Patent
1993-07-12
1995-01-17
Arola, Dave W.
Pipe joints or couplings
Safety release
285 18, 285330, 166243, 294265, F16L 3500
Patent
active
053820568
ABSTRACT:
A riser string connecting a floating vessel to a subsea well has a weak link coupling which will part the riser string once a minimum force is reached. The weak link coupling has a release mechanism which operates at the minimum force. An arming device has a locked position which will prevent operation of the release mechanism. The operator can remotely shift the arming device into an armed position in which the release mechanism will release at the minimum force. The operator can shift the arming device back to the unarmed position if separation did not occur. An actuator will move the arming device from the locked position to the release position. Tapered surfaces on the box and pin of the weak link coupling neutralize the effect of bending moments on the weak link coupling.
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ABB Vetco Gray Inc.
Arola Dave W.
Bradley James E.
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