Pneumatic riser tensioner

Details Pneumatic riser tensioner Pneumatic riser tensioner

1987-05-13

1989-02-28

Corbin, David H.

Hydraulic and earth engineering

Marine structure or fabrication thereof

166355, E02B 1700, E21B 4301

Patent

active

048080357

ABSTRACT:
A system for supporting one end of a riser or other elongate element from a marine structure. In the preferred embodiment, a plurality of gas springs are symmetrically disposed about the upper end of a riser. The axis of compression of each gas spring is parallel to the axis of the riser. One end of each gas spring is secured to the riser and the other end of each gas spring is secured to the marine structure. Relative motion between the riser and marine structure along the riser axis is accommodated by contraction or extension of the gas springs. A gas reservoir can be provided to reduce pressure changes as the gas springs extend and contract. This reduces changes in the loading applied to the riser as the marine structure moves relative to the ocean bottom.

REFERENCES:
patent: 3760875 (1973-09-01), Busking
patent: 4266888 (1981-05-01), Bayer et al.
patent: 4359095 (1982-11-01), Goldsmith
patent: 4379657 (1983-04-01), Widiner et al.
patent: 4395160 (1983-07-01), deJong
patent: 4432420 (1984-02-01), Gregory et al.
"Drilling and Producing Operations Utilizing a Tension-Leg Platform", by R. E. Ireland et al., SPE Drilling Engineering, Oct. 1986, pp. 383-389.
"Riser Tensioners for a TLP Application", by F. H. MacPhaiden et al., OTC Paper 4985, May 1985, pp. 241-249.

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