Title: Fluid pressure-tensioned slip joint for drilling riser

Abstract: A drilling riser between a subsea wellhead and a floating platform has a slip joint in its upper end. A chamber is formed within the slip joint and supplied fluid pressure to develop a tensioning force on the upper end of the riser as the floating platform cycles vertically under the influence of heave and tidal forces.

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Inventors: Shapiro, Maurice S. (Oxnard, CA)

Application Number: 06/278810
Filing Date: 1981-06-29
Publication_date: 1983-01-11
Assignee: Combustion, Eng

Primary Class(es): 405/224.200 175/7, 166/355, 175/321
Other Classes: E21B7/128; E21B17/01; E21B17/08; E21B7/12; E21B17/00; E21B17/02; E21B7/128; E02D21/00
US Patent Ref:

3217805	November, 1965	Howarel	166/355
3353851	November, 1967	Vincent	166/355
3427051	February, 1969	White et al.	285/302
3643751	February, 1972	Crickmer	175/7
3764168	October, 1973	Kisling et al.	285/302
4211290	July, 1980	Mason et al.	175/321

Other Refs:
Primary Examiner: Corbin, David H.
Assistant Examiner: Pistel, Nancy J.
Attorney: Wade, Arthur L.

Claims:

I claim: