Riser tensioning system

Details Riser tensioning system Riser tensioning system

1985-08-20

1987-04-07

Levy, Stuart S.

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

114230, 2421073, 2421075, 254374, 267 571R, 2671404, B63B 2116, B65H 7548, B66D 114, F16F 148

Patent

active

046554335

ABSTRACT:
A tensioner (10) is disclosed for use in tensioning connecting lines (16) connecting a marine riser (14) to a floating platform (12). The tensioner (10) is a passive system which incorporates a series of cylindrical elastomeric members (42, 54, 60) which are deformed in torsion to exert the proper tension on the connecting line (16). A specially tapered drum (30) is provided on the tensioner so that the radial distance from the axis of rotation of the drum to the position where the line leaves the drum varies to compensate for the variation in torsional moment of the elastomeric members so that a predetermined tension can be maintained on the line (16) as the line is payed out and taken in from the tapered drum.

REFERENCES:
patent: Re30842 (1982-01-01), Speer
patent: 2051735 (1936-08-01), Michelson
patent: 2152969 (1939-04-01), Nash
patent: 2167508 (1939-07-01), Herold
patent: 2203342 (1940-06-01), Sloman et al.
patent: 2939680 (1960-06-01), Powell
patent: 3075724 (1963-01-01), Stahmer
patent: 3743249 (1973-07-01), van Daalen
patent: 4057219 (1977-11-01), Sobolewski
patent: 4108508 (1978-08-01), Clinard

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