Mud saver valve with replaceable inner sleeve

Details Mud saver valve with replaceable inner sleeve Mud saver valve with replaceable inner sleeve

1989-02-01

1990-10-16

Kisliuk, Bruce M.

Boring or penetrating the earth

With above-ground means for handling drilling fluid or cutting

With valve

137327, 166322, 166325, 251357, 251368, E21B 2110, F21K 5100

Patent

active

049628194

ABSTRACT:
A mud saver valve for insertion within the drill string to retain mud in the drill pipe and prevent the mud column from flowing past the valve when pumping is interrupted. The valve body has a tubular body and a piston having an axial passage for the flow of drilling mud. This piston is biased within the body by a spring and axially movable in response to the mud flow. A check valve plug is disposed within the bore which may be removed to run wireline tools. The plug is seated within a reduced diameter portion of the body and includes a replaceable inner sleeve which engages the piston to prevent flow through the valve. The inner sleeve is replaced as it becomes worn due to the erosive forces of the drilling mud.

REFERENCES:
patent: 3698426 (1972-10-01), Litchfield et al.
patent: 3757816 (1973-09-01), Price
patent: 3965980 (1976-06-01), Williamson
patent: 3967679 (1976-07-01), Liljestrand
patent: 4128108 (1978-12-01), Parker et al.
patent: 4196886 (1980-04-01), Murray
patent: 4364407 (1982-12-01), Hilliard
patent: 4625755 (1986-12-01), Reddoch
patent: 4658905 (1987-04-01), Burge
patent: 4705062 (1987-11-01), Baker
patent: 4779688 (1988-10-01), Baugh

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