Apparatus for controlling the force applied to a drill bit while

Details Apparatus for controlling the force applied to a drill bit while Apparatus for controlling the force applied to a drill bit while

1985-11-22

1988-01-26

Bilinsky, Z. R.

Boring or penetrating the earth

Automatic control

Of boring means including a below-ground drive prime mover

175 27, 175107, 408 12, E21B 402

Patent

active

047211725

ABSTRACT:
A method of apparatus for controlling in a wellbore the force applied to a rotating drill bit of the type having fluid circulating through an opening in the lower end thereof. One aspect of the method comprises sensing the torque in the drill bit and varying the flow of the circulating fluid through the drill bit responsive to the torque. Apparatus is provided for maintaining constant torque in the drill bit by varying the fluid flow through the bit, which varies in turn the weight applied to the bit and therefore bit torque.

REFERENCES:
patent: 2879032 (1959-03-01), Whottle

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