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:
Sep. 23, 1980
Filed:
Sep. 28, 1978
Applicant:
Inventors:
Jean-Pierre L Boutet, Paris, FR;
Francois C Gueuret, Boulogne Billancourt, FR;
Assignee:
Compagnie Francaise des Petroles, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166368 ; 166 / ; 166 89 ;
Abstract
In a production well-head for an underwater oil well the suspension head of the innermost tubing, which has a frusto conical surface on which the production tube suspension member seats, has a duct leading from the enclosed space between the innermost tubing and the tubing adjacent thereto, to the interior of the innermost tubing, and a duct communicating therewith is provided in the suspension member.