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:
Feb. 14, 2012
Filed:
Mar. 25, 2008
Clifford H. Beall, Broken Arrow, OK (US);
Michael J. May, Broken Arrow, OK (US);
James T. Sloan, Broken Arrow, OK (US);
Andrew Haynes, Houston, TX (US);
Thad D. Andrews, Tulsa, OK (US);
Clifford H. Beall, Broken Arrow, OK (US);
Michael J. May, Broken Arrow, OK (US);
James T. Sloan, Broken Arrow, OK (US);
Andrew Haynes, Houston, TX (US);
Thad D. Andrews, Tulsa, OK (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A ball type downhole barrier valve capable of bidirectional sealing features a ball rotating on its axis to open or close with control line pressure to an actuating rod piston assembly. The ball is also shiftable to a locked open position. A cage surrounds the ball and retains opposed seats to it. The cage is made from one piece and tangential holes are drilled and tapped before the piece is longitudinally split with a wire EDM cutting technique. Fasteners to rejoin the cut halves properly space them to the original one piece internal dimension. Auxiliary tools allow determination of spacing of internal components so that a desired spring preload on the seats against the ball can be achieved. Seals on the sleeves that form ball seats help prevent leakage due to ball distortion at high differential pressures when the valve is closed.