Ball actuable circulating dump valve

Details Ball actuable circulating dump valve Ball actuable circulating dump valve

1985-07-12

1986-03-11

Weakley, Harold W.

Boring or penetrating the earth

With means movable relative to tool or shaft to control...

166317, 166318, 166319, 137118, 137 71, E21B 4100

Patent

active

045748942

ABSTRACT:
A dump valve for use in a downhole motor having a spring-based piston responsive to fluid flow to close a fluid flow port and to a ball actuated force to reopen the port.

REFERENCES:
patent: 2579439 (1951-12-01), Noe
patent: 3559734 (1971-02-01), Pitts
patent: 4081032 (1978-03-01), Hutchison
patent: 4441558 (1984-04-01), Welch
patent: 4479545 (1984-10-01), Eley
patent: 4513764 (1985-04-01), Yonker

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