Motion Compensation

Motion CompensationOPT’s innovation was put to the test when a deepwater salvage company challenged OPT to develop, build, and deliver a subsea drill pipe motion compensator for its salvage system. The salvage company uses a drill ship that suspends a huge hydraulically-operated claw which rips apart sunken ships and then delicately grabs and recovers valuable cargo and raw materials. The claw is suspended from drill pipe and needed a motion compensator just above it to neutralize weight and wave-induced heave motion.

OPT’s engineers rose to the challenge and developed a novel, self-contained motion compensator that could not only handle 10 feet of heave motion and the weight of the 57-ton claw, but had to do it in up to 20,000 feet of water—more than 1½ times the depth of the RMS Titanic! All of this while being able to remotely adjust the net weight being placed on the delicate cargo by the claw from 2½ to 30 tons with only minimal variation in this load as the drill ship moved up and down on the waves.

 

Motion Compensation

 

OPT built and tested the equipment in the U.S. and delivered it to the customer for live sea trials on a sunken ocean liner situated off the southern coast of Ireland…the successful conclusion of another example of OPT’s innovative and rapid response to the special needs of its customers.