Mechanically actuated fluid control device for downhole fluid mo

Details Mechanically actuated fluid control device for downhole fluid mo Mechanically actuated fluid control device for downhole fluid mo

1991-11-21

1992-12-29

Britts, Ramon S.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

175317, E21B 402

Patent

active

051743922

ABSTRACT:
Apparatus is disclosed for controlling the power supplied to a drill bit by a downhole fluid powered motor to prevent the motor from rotating the bit at high speeds when there is little or no weight in the bit while maintaining full circulation through the fit. Apparatus also disclosed for restricting the flow of drilling fluid of the drill pipe when circulation is fully or partially lost.

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patent: 4553611 (1985-11-01), Lyons
patent: 4768598 (1988-09-01), Reinhardt
patent: 4936397 (1990-06-01), McDonald et al.

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