High pressure automatic mud saver valve

Details High pressure automatic mud saver valve High pressure automatic mud saver valve

1990-11-13

1993-10-19

Neuder, William P.

Wells

Automatic

137493, 166326, 251 5, E21B 3402

Patent

active

052537048

ABSTRACT:
The disclosure relates to an improved diaphragm type mud saver valve, commonly referred to as a Kelley valve, which closes automatically to prevent loss and spilling of drilling mud. The improved valve can withstand very high drilling and pump pulsation pressures, for example, the pressures required for drilling wells over 20,000 feet in depth and mud pressures can exceed 15,000 p.s.i. The disclosure prevents the formation of gas pockets by providing gas escape openings and a clearance space between the support and backup element to prevent the extrusion of the diaphragm material through the small openings in a backup sleeve thus extending the life of the diaphragm and allowing proper diaphragm seating.

REFERENCES:
patent: 3494588 (1970-02-01), Kisling, III
patent: 3552712 (1971-01-01), Whitlock
patent: 3566964 (1971-03-01), Livingston
patent: 3717203 (1973-02-01), Kirkpatrick et al.
patent: 3955594 (1976-05-01), Snow
patent: 4349204 (1982-09-01), Malone
patent: 4494345 (1985-01-01), Peterson
patent: 4628996 (1986-12-01), Arnold
patent: 4768590 (1988-09-01), Sanford et al.
patent: 4790344 (1988-12-01), Chauvier et al.
patent: 4832120 (1989-05-01), Coronado

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