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:
Jul. 01, 1986
Filed:
Nov. 23, 1983
Paul M Helderle, Boulogne, FR;
Compagnie Francaise des Petroles, Paris Cedex, FR;
Abstract
A safety valve for installation in a well to close the passage for effluent therefrom comprises a valve body of generally cylindrical shape, shut-off element in a lower part of this body, and a cylindrical slideblock which is slidable longitudinally in the body and adapted to cause, in its descending movement, the opening of the shut-off element. A locking system for locking the valve in the well is located in a radially outer portion of the body and comprises a radially expandable attachment component for engaging, when expanded, in a stop groove provided in the receiving connection of the well surrounding the body. Upper and lower sealing elements for sealing against the receiving connection are arranged on radially outer regions of the body for forming between them a space for receiving a control fluid for the valve, the two sealing elements being arranged longitudinally one on each side of the locking system.