Mud saver valve

Details Mud saver valve Mud saver valve

E - Fixed Constructions

21

B

255/25

E21B 21/10 (2006.01)

Patent

CA 1325204

MUD SAVER VALVE ABSTRACT OF THE DISCLOSURE A mud valve assembly with a valve means with a first sealing surface and a piston means with a second sealing surface which seals against the first sealing surface such that the piston and the first seal surface move downward in response to pressure from above which exceeds a predetermined pressure level and the valve means and the second sealing surface move upwards in response to pressure from below the valve assembly; and the valve means with the second sealing surface can be retrieved from the bore of the drill pipe and reinstalled into the bore of the drill pipe without removing the mud valve assembly from the drill pipe.

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