Mud retaining valve

Details Mud retaining valve Mud retaining valve

1977-04-20

1978-12-05

Weakley, Harold W.

Fluid handling

With repair, tapping, assembly, or disassembly means

With disassembly tool engaging feature

1374939, 137508, F16K 4300

Patent

active

041281080

ABSTRACT:
A valve adapted for insertion in a radially enlarged portion of the kelly saver sub to retain mud in the kelly when the drill pipe is disconnected therefrom, including a tubular body with a downwardly extending closure member supported thereby, and a piston having an axial passage for the flow of drilling mud therethrough, axially movble within the body. The plug may be removed from the bore by the application of an upwardly directed tension force thereto, so that wire line tools may be run through the bore and the passage.

REFERENCES:
patent: 834855 (1906-10-01), Woodman
patent: 1196142 (1916-08-01), Schroeder
patent: 2415750 (1947-02-01), Melichar
patent: 2776015 (1957-01-01), Bielstein
patent: 2841171 (1958-07-01), Baker
patent: 2855952 (1958-09-01), Tavsch
patent: 2938540 (1960-05-01), Schatzman
patent: 2951500 (1960-09-01), Hunter
patent: 3294113 (1966-12-01), Chenoweth
patent: 3331385 (1967-07-01), Taylor
patent: 3967680 (1976-07-01), Jeter

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