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:
Aug. 05, 1986
Filed:
Aug. 29, 1984
Jon L Edwards, Houston, TX (US);
Mark L Carter, Houston, TX (US);
Hydril Company, Los Angeles, CA (US);
Abstract
A tubing retrievable surface controlled subsurface safety valve having a rotatable ball-type flow closure element is disclosed. A tubular operator assembly imparts longitudinal movement to the ball greater than the predetermined movement required to effect the desired ball rotation. The ball element is normally maintained by a closing spring arrangement and is rotated open by increased control fluid pressure. Camming slides on the ball rotation pins reduce contact stress during ball operation. A locking sleeve having a longitudinal locking movement greater than the predetermined movement to rotate the ball open is provided. Operating movement of the locking sleeve uncovers a control fluid port for operating a supplemental subsurface valve operably secured with the valve. Prior to activating the locking sleeve to install the supplemental valve, the valve may be controlled by control fluid pressure communicated into an expansible chamber. The chamber is formed by two pairs of seals located on different diameters and at opposite ends of an operator sleeve guide member. The guide member contains both pairs of seals against extrusion from extreme pressure differentials. The seals are pressure energized and the seals of each pair are faced in opposite directions to maintain sealing integrity under all pressure differential operative conditions.