Dump valve for use with downhole motor

Details Dump valve for use with downhole motor Dump valve for use with downhole motor

1979-06-14

1981-03-31

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring with specific fluid

137517, 137843, 166329, 175317, E21B 402, E21B 2110, F16K 1504, F16K 1514

Patent

active

042588014

ABSTRACT:
A dump valve having a valve seat and a valve member is located in a string of drill pipe above a downhole motor. The dump valve connects the inside of the drill string with the annulus and allows drilling mud to flow freely therebetween when drilling mud is not being pumped through the drill string to operate the downhole motor. The valve member is made of a deformable resilient material such as rubber. It is held away from the valve seat by spacers until the pressure drop across the valve member is sufficient to deform the valve member and move it past the spacers into engagement with the valve seat. When the pressure differential is relieved, the valve member will return to its normal, unstressed shape opening the valve.

REFERENCES:
patent: 2933136 (1960-04-01), Ayers et al.
patent: 3010514 (1961-11-01), Fox
patent: 3077204 (1963-02-01), Bennett et al.
patent: 3367363 (1968-02-01), Hoffman
patent: 3376934 (1968-04-01), Willman et al.
patent: 4108203 (1978-08-01), Brown
patent: 4165764 (1979-08-01), Grandclement
patent: 4187061 (1980-02-01), Jurgens

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