[12] Patent
[11] Patent No.:GC0004497  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2016                32/2016  
Number of the Decision to Grant the Patent:2016/88976
Date of the Decision to Grant the Patent:05/Dec/2016

[21] Application No.:GCC/P/2009/13122

[22] Filing Date:25/3/2009

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- Beall, Clifford H،2- May, Michael J،3- Sloan, James T،4- Haynes, Andrew،5- Andrews, Thad D

[73] Owner: Baker Hughes Incorporated, 2929 Allen Parkway, Suite 2100, Houston, USA

[74] Agent: Saba & Co. T.M.P




Int. Cl.: E21B34/06; E21B34/08; E21B43/12 (2006.01)

[56] Cited Documents:

-US 6691785 B2 (PATEL) 17 February 2004
-US 4476933 A (BROOKS) 16 October 1984
-US 4197879 A (YOUNG) 15 April 1980
-US 2002-0040788 A1 (HILL, JR. et a1.) 11 April 2002
Examiner: Eng. Ahmed Saleem AlHinai

[57] 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.
No. of claims: 15     No. of figures: 15


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