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:
Jan. 19, 1988
Filed:
May. 21, 1986
Lee K Brasted, Kingwood, TX (US);
Edward S Piter, Tulsa, OK (US);
Shell Offshore Inc., Houston, TX (US);
Abstract
A method and apparatus for positioning an offshore well substructure on the ocean floor. A substructure having a heigth of 1350 feet and base of 400 feet by 480 feet is subject to significant lateral forces caused by wind, wave, and current forces between the time period of lowering it to the ocean floor and driving piles through its skirt sleeves and into the ocean floor. Mudmats carried by the bottom corners of the substructure have downwardly-extending peripheral walls which penetrate the ocean floor so as to resist any lateral force to which the substructure is subjected. The base of a mudmat is approximately 10,000 square feet and the walls are approximately five feet high. A manifold system carried by each mudmat provides the capability of adjusting the level of the substructure after it has been lowered onto the ocean floor.