The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1993
Filed:
Jul. 29, 1991
Applicant:
Inventor:
Carl G Langner, Spring, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
4051951 ; 405158 ; 4052231 ; 166367 ; 285223 ;
Abstract
A method and apparatus is described for installing an export production riser on an offshore production platform that moves in response to ocean waves, wind and currents. The riser is provided with a catenary shape between the near vertical connection on the platform and the horizontal position on the seafloor. The upper end of the riser is maintained at a nominal inclination from the vertical to control excessive bending stresses in the riser. A flexible joint is provided at the upper end of the riser to allow rotational movement between the riser and platform as the platform moves.