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:
Apr. 29, 2014
Filed:
Feb. 13, 2006
Jack Pollack, Houston, TX (US);
David Riggs, Coppell, TX (US);
Feng Guo, Spring, TX (US);
Single Buoy Moorings, Inc., Marly, CH;
Abstract
A method for installing risers so they extend from a FPU (floating production unit) to multiple subsea hydrocarbon wells of an oil field, which avoids damage to the pipe sections and that is economical. As pipe sections are connected to a near end () of a pipe string portion (B-D) that lies at the FPU, a tug boat () pulls the far end () of the pipe string toward a well head. Initially, a long pull line () extends from a winch () on the tug boat, in a double catenary curve to the far end of the pipe string. The winch is operated to shorten the pull line until the pipe string extends in a double catenary curve (). Tension in the pipe string is maintained at a proper level during installation by maintaining the near end portion of the pipe string so it extends at a near end angle () to the vertical that continually lies within a predetermined range, such as from 3° to 12°.