Apparatus and method for moving rig structures

Details Apparatus and method for moving rig structures Apparatus and method for moving rig structures

1994-04-14

1996-02-20

Ricci, John A.

Hydraulic and earth engineering

Marine structure or fabrication thereof

With horizontally movable work deck

166366, 180 72, 254103, 301 523, 305 39, E02B 1700

Patent

active

054924367

ABSTRACT:
Disclosed is an improved apparatus and method of moving a large, heavy structure or piece of machinery, such as an oil rig structure on an offshore platform. A plurality of load bearing plates are provided for supporting the structure. Each of the load bearing plates rides upon a plurality of rollers connected together by an endless chain revolving about a central core member when the structure is to be moved. A motor drives the endless chain connecting the rollers on which at least one of the load bearing plates rides when the structure is to be moved. A worm gear coupled to the motor transmits the motion of the motor to the endless chain to translate the structure across a platform.

REFERENCES:
patent: 657129 (1900-09-01), McCollister
patent: 722433 (1903-03-01), Ritchie
patent: 1232597 (1917-07-01), Noble
patent: 2668517 (1954-02-01), Craft
patent: 3031167 (1962-04-01), Roussel
patent: 3033525 (1962-05-01), Johnson
patent: 3802137 (1974-04-01), Armstrong
patent: 4288177 (1981-09-01), Schoonmade
patent: 4602894 (1986-07-01), Lorenz et al.
patent: 4823870 (1989-04-01), Sorokan

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