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:
Mar. 24, 1987
Filed:
Jul. 03, 1985
Gerald W Crotwell, Sugar Land, TX (US);
Cameron Iron Works, Inc., Houston, TX (US);
Abstract
The present invention relates to an improved subsea wellhead structure which includes a conductor casing having an internal upwardly facing shoulder, and an internal groove above the shoulder, an external groove, a wellhead housing having an external downwardly facing shoulder adapted to seat on the casing shoulder, an external shoulder above the seat shoulder which tapers upwardly and outwardly at a slight angle, such as, for example, five degrees, a split latching and loading ring surrounding said housing and seated on said tapered external shoulder, a cam ring above the split ring, means for releasably retaining the cam ring in its inactive position and actuating means for moving the cam ring into position wedging the split ring outwardly on the tapered shoulder into tight load transmitting position within the internal casing groove and the tapered shoulder. This loading of split ring 50 and shoulders 42 and 32 of housing 40 and conductor casing 28 cause cyclic external loads on the upper portion of wellhead housing to be transferred into conductor casing and to insulate the smaller casings from such loading.