Deepwater subsea lowering/lifting system

Details Deepwater subsea lowering/lifting system Deepwater subsea lowering/lifting system

1988-02-01

1989-06-13

Hail, III, Joseph J.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

212259, 254387, 254399, B66C 100, B66D 100, B66D 308

Patent

active

048385220

ABSTRACT:
Fixed and traveling cable blocks along with first and second cable grip assemblies are supported adjacent the load to be lifted or lowered. A lifting/lowering cable is threaded through the cable grip assemblies before being secured to the load while a separate cable suspends the traveling block from the fixed block. By alternately closing one cable grip and opening the other, the load becomes movable upon the movement of the traveling block. Additionally, by closing the previously opened cable grip and opening the previously closed cable grip, the traveling block may be re-positioned or re-cycled while the load remains stationary. Upon such re-positioning, the lowering/lifting operation of the load can be repeated.

REFERENCES:
patent: 467529 (1892-01-01), Victor
patent: 873090 (1907-12-01), Rigby
patent: 2833118 (1958-05-01), Nixon
patent: 3856267 (1974-12-01), Flannelly
patent: 4446807 (1984-05-01), Johnson et al.
patent: 4641816 (1987-02-01), Kishida et al.

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