Jack-up rig with improved rack chock assembly

Details Jack-up rig with improved rack chock assembly Jack-up rig with improved rack chock assembly

1995-09-21

1997-04-22

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

With work deck vertically adjustable relative to floor

405196, 254112, E02B 1706

Patent

active

056224524

ABSTRACT:
The invention relates to a jack-up rig unit for offshore use which has a floatable hull supportable by one or more legs above a water line, a jack-up unit for elevating the hull and a rack chock assembly for rigidly locking the legs to the hull without introducing substantial bending moments in the legs. The rack chock assembly is laterally movable into and out of engagement with respect to the legs and, in case of a lock-up between the leg and the rack chock assembly, the invention provides for the use of a wedge member incorporated into a rack chock assembly, with a wedge member adapted for a limited sliding movement in relation to a longitudinal axis of the leg, so as to break locked engagement between the teeth of the rack chock assembly and the leg.

REFERENCES:
patent: 2966336 (1960-12-01), Owen
patent: 4255069 (1981-03-01), Yielding
patent: 4269543 (1981-05-01), Goldman et al.
patent: 4479401 (1984-10-01), Korkut
patent: 4589799 (1986-05-01), Hotta et al.
patent: 4662787 (1987-05-01), Tatsuguchi
patent: 5139366 (1992-08-01), Choate et al.

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