Mud saver valve

Details Mud saver valve Mud saver valve

1987-12-04

1990-02-13

Massie, IV, Jerome W.

Boring or penetrating the earth

With above-ground means for handling drilling fluid or cutting

With valve

137493, 137508, 166325, E21B 2110

Patent

active

048998370

ABSTRACT:
A mud valve assembly is disclosed having a valve member with a first sealing surface and a piston member with a second sealing surface which seals against the first sealing surface such that the piston and the first sealing surface move downward in response to pressure from above which exceeds a predetermined pressure level and the valve member and the second sealing surface move upward in response to pressure from below the valve assembly. The valve member 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.

REFERENCES:
patent: 3698426 (1972-10-01), Litchfield et al.
patent: 3750749 (1973-08-01), Giroux
patent: 4128108 (1978-12-01), Parker et al.
patent: 4248264 (1981-02-01), Hadsell et al.
patent: 4364407 (1982-12-01), Hilliard
patent: 4625755 (1986-12-01), Reddoch
patent: 4658905 (1987-04-01), Burge
patent: 4779688 (1988-10-01), Baugh

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