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:
May. 08, 1984
Filed:
Jun. 16, 1982
Michael L Bowyer, Aberdeen, GB;
Drummond Whiteford, Aberdeen, GB;
Baker Oil Tools, Inc., Orange, CA (US);
Abstract
A ball type safety valve mounted in a movable cage for automatically closing a subterranean well conduit is disclosed. The ball has a central flow passage which can be aligned with the tubing to permit production and can be automatically rotated to block the tubing. The ball is moved from its closed to its open position by an increase in control fluid pressure, preferably in an external control fluid line extending to the surface of the well. An increase in control fluid pressure causes the cage to move axially and rotation is imparted by the offset camming means attached to a stationary base member. The base member is adjustable relative to the valve housing and to the cage to insure that the valve is fully open and fully closed at opposite extremes of the travel of the cage and ball assembly.