Patent ID: 8113286
Filing Date: 2012-02-14
Classification: E21B

Abstract:
1. A downhole valve, comprising: a housing having a passage therethrough: a ball having a bore therethrough rotatably mounted to rotate, without translation, on its axis to align and misalign said bore with said passage; said passage defined by opposed sleeves with seals that remain in contact with said ball as it rotates; and at least one rod piston mounted in a rod piston bore in said housing where said rod piston bore is isolated from said passage and said rod piston is actuated in opposed directions, said rod piston linked to said ball for simultaneous movement with said ball, said piston receiving actuation pressure through said housing, said actuation pressure isolated from pressure in said passage for selective actuation of said rod piston in opposed directions to in turn actuate said ball in opposed directions for aligning and misaligning of said bore in said ball with said passage.