Mud-saver valve

Details Mud-saver valve Mud-saver valve

1997-02-13

2000-04-25

Walton, George L.

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

137 15, 251 5, 251 611, 175218, 175317, F16K 707, F16K 31126

Patent

active

060531916

ABSTRACT:
A mud saver valve adapted to be connected below a kelly including an elastomeric sleeve that opens and closes within a housing, the sleeve defining a flow passage within it and closing against a barrier located within the flow passage, the sleeve closing against the core at low positive differential pressures.

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