Modular riser tensioner incorporating integral hydraulic cylinde

Details Modular riser tensioner incorporating integral hydraulic cylinde Modular riser tensioner incorporating integral hydraulic cylinde

1986-11-17

1989-01-24

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

166350, 166355, 405303, 267126, 254277, E02D 2100

Patent

active

047998270

ABSTRACT:
A tensioner unit (12) comprising an inner cylinder (22), filled partially with hydraulic fluid, with a piston (26) and piston rod (28) reciprocal therein (sometimes referred to as a hydraulic cylinder) surrounded by a cylindrical chamber (40) (sometimes referred to as an accumulator) for hydraulic fluid and gas. The gas in accumulator (40) is pressurized to maintain the hydraulic fluid under pressure against the piston (26) placing the piston rod (28) under tension to provide the necessary tension force on a marine riser (14) and to compensate for the rise and fall of a floating platform. This is a self-contained integral unit with one end of the piston rod (28) connected to the riser (14), and the other end connected to a frame (16) supported on a platform of a TLP. A plurality of such tensioner units (12) on this frame (16) and connected to said riser (14) form a complete riser tensioner (10) without external accumulators.

REFERENCES:
patent: 3580559 (1971-05-01), Spieth
patent: 3912227 (1975-10-01), Meeker et al.
patent: 3943868 (1976-03-01), Person et al.
patent: 4222341 (1980-09-01), Larsen et al.
patent: 4379657 (1983-04-01), Widiner et al.
patent: 4423983 (1984-01-01), Dadiras et al.
patent: 4449854 (1984-05-01), Nayler
patent: 4540159 (1985-09-01), Jordan
The Retsco Space Saver.TM. Riser Tensioner, Retsco, Inc. 1985.

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