Method and apparatus for setting a superstructure onto an offsho

Details Method and apparatus for setting a superstructure onto an offsho Method and apparatus for setting a superstructure onto an offsho

1990-03-29

1991-08-06

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Floatable to site and supported by marine floor

405203, E02D 2500

Patent

active

050372416

ABSTRACT:
An improved apparatus is disclosed for setting a deck structure or other marine superstructure using a barge mounted cantilevered support structure. The cantilevered support structure is attached at one end of a floating vessel. The cantilevered support structure extends past the edge of the vessel and, in one embodiment, includes means for rotating parallel support members about the deck of the floating vessel permitting the cantilevered support structure to be raised and lowered while it remains substantially parallel with the top of the offshore platform enabling the superstructure to engage the top of a previously installed offshore platform in a synchronized manner. Alternatively, this superstructure may be aligned directly over the platform. A cantilevered drilling rig is then aligned over the cantilevered support structure and used to lift the deck structure or marine superstructure, permitting the vessel and cantilevered support structure to move. The drilling rig is then used to lower the marine superstructure onto the top of the previously installed offshore platform.

REFERENCES:
patent: 2934905 (1960-05-01), Woolslayer et al.
patent: 2959015 (1960-11-01), Beck
patent: 3058311 (1962-10-01), Woolslayer et al.
patent: 4556004 (1985-12-01), Lamy et al.
patent: 4662788 (1987-05-01), Kypke et al.
patent: 4668127 (1987-05-01), Steele
patent: 4714382 (1987-12-01), Khachaturian
patent: 4829924 (1989-05-01), Dysarz
patent: 4874269 (1989-10-01), Dysarz
"Can a Jackup Rig Install a Fixed Platform?", Drilling Contractor, Oct./Nov. 1989, pp. 13-15.

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