Mud saver valve

Details Mud saver valve Mud saver valve

1991-05-10

1992-11-24

Dang, Hoang C.

Boring or penetrating the earth

With above-ground means for handling drilling fluid or cutting

With valve

13751215, 137853, 137906, 166321, 175317, 175324, 251 5, E21B 2110

Patent

active

051654938

ABSTRACT:
A mud saver valve in which a cylindrical resilient sleeve is pressed against an inner tubular member by a pressurized gas to prevent flow from above the valve to below the valve at low pressures, and which is fully opened for free flow at higher pressures.

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An advertising sheet showing "Beta Mud Saver Valve" published by Radsil Tool Company, Inc., 1990.

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