Rod accumulator riser tensioning cylinder assembly

Details Rod accumulator riser tensioning cylinder assembly Rod accumulator riser tensioning cylinder assembly

1992-07-13

1993-10-12

Corbin, David H.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Structure protection

4052244, E21B 4301

Patent

active

052520048

ABSTRACT:
A "rod accumulator" riser tensioning cylinder assembly for use with off-shore production and exploratory drilling facilities. The tensioner is basically a hydro-pneumatic spring having a tubular cylinder equipped with a hollow rod containing sufficient volume to act as an accumulator. The rod is internally ported to the annulus of the cylinder. The cylinder exterior is coated with a material that will insulate the unit when exposed to high temperature and flame. A wear sleeve is supplied over the insulation material to provide a low friction surface for an outer, cylindrically shaped rod insulation jacket to slide over the cylinder when the rod is stroked into the cylinder. When the rod is stroked out, the jacket is also extended, protecting the rod from flame and high temperature due to its insulative properties. This is a low mass and low volume system, with low lateral area so that an increased number of such cylinder assemblies can be provided in a given horizontal area.

REFERENCES:
patent: 3804216 (1974-04-01), Katsumori et al.
patent: 4883387 (1989-11-01), Myers et al.
patent: 5158397 (1992-10-01), Koos et al.

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