Apparatus for actuating downhole flow control valves

Details Apparatus for actuating downhole flow control valves Apparatus for actuating downhole flow control valves

1981-07-13

1982-08-17

Purser, Ernest R.

Boring or penetrating the earth

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

13750524, 299 17, E21C 4500

Patent

active

043444911

ABSTRACT:
A method and apparatus is provided for actuating downhole flow control valves in a borehole mining tool to change the tool function from drilling to mining while still in the borehole. Self-activating actuators employing only system pump pressure control the flow of fluid to the drill bit, the mining jet, the discharge eductor or eductors and are located within the discharge conduit or in a compartment in the tool to change the function of the operative components. The valve actuator can actuate more than one valve simultaneously.

REFERENCES:
patent: 1110294 (1914-09-01), Osmer
patent: 3155177 (1964-11-01), Fly
patent: 3316985 (1967-05-01), Fly
patent: 3730592 (1973-05-01), Wenneborg et al.
patent: 3747696 (1973-07-01), Wenneborg et al.
patent: 4035023 (1975-07-01), Cockrell
patent: 4059166 (1977-11-01), Bunnelle
patent: 4067617 (1978-01-01), Bunnelle
patent: 4077481 (1978-03-01), Bunnelle
patent: 4077671 (1978-03-01), Bunnelle
patent: 4134619 (1979-01-01), Bunnelle

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