Circulation valve for in-hole motors

Details Circulation valve for in-hole motors Circulation valve for in-hole motors

1979-06-11

1981-11-03

Pate, III, William F.

Boring or penetrating the earth

Processes

Boring with specific fluid

175107, 175243, 175317, E21B 402

Patent

active

042980771

ABSTRACT:
An in-hole fluid motor has a stator connected with a fluid conduit and a rotor connected with a drive shaft for a bit to drill a bore hole as drilling fluid is circulated through the conduit and the stator, the fluid returning through the bore hole annulus to the top of the bore hole. A circulation valve between the stator and the fluid conduit is opened by the flow of fluid through the valve to by-pass the stator and allow flow of fluid into the annulus. The circulation valve is incorporated in a structure which allows the conduit to fill and dump during lowering in and removal from the fluid in the bore hole.

REFERENCES:
patent: 3005507 (1961-10-01), Clark, Jr. et al.
patent: 3365007 (1968-01-01), Skipper
patent: 3833074 (1974-09-01), Courtois
patent: 3989114 (1976-11-01), Tschirky et al.
patent: 3997609 (1976-12-01), Fox

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