Marine heave compensating device

Details Marine heave compensating device Marine heave compensating device

1984-10-19

1986-03-18

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

166359, 175 7, 114264, B63B 3544

Patent

active

045765170

ABSTRACT:
A marine heave compensating device comprises a hydraulic piston and cylinder unit (15,16) with its cylinder (15) secured to a support (10,11). The piston is connected via a piston rod (16) to a cross-head (17) on which a first set of pulleys (18) are rotatably mounted. Chains (19) secured at one end to the support (10,11) are entrained around pulleys (18) and support a yoke (20) on which is mounted a crown block (21). A cable (22) is reeved around crown block (21) and around a travelling block (23) which carries a tool carrier (24). The two ends of cable (22) are reeved around two second pulleys (26A,26B) rotatably mounted on the cross-head (17). End (22A) of cable (22) is connected to a draw-works and end (22B) of cable (22) is connected to a tie-down.

REFERENCES:
patent: 3760875 (1973-09-01), Busking
patent: 3939991 (1976-02-01), Person
patent: 3943868 (1976-03-01), Person et al.
patent: 4200054 (1980-04-01), Elliston
patent: 4351261 (1982-09-01), Shanks
patent: 4379657 (1983-04-01), Widiner et al.
patent: 4487150 (1984-12-01), Shanks

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