Method for controlling the head of a drilling or core-drilling d

Details Method for controlling the head of a drilling or core-drilling d Method for controlling the head of a drilling or core-drilling d

1994-07-18

1996-03-26

Buiz, Michael Powell

Boring or penetrating the earth

Automatic control

Of advance or applied tool weight

175 45, E21B 4700

Patent

active

055012850

ABSTRACT:
Electrodes are provided in a drill bit, or alternatively, in a coring bit, to measure variations in formation resistivity surrounding an earth borehole. Three orthoganal accelerometers are also provided in the drill bit, or in the coring bit, to monitor the dynamic behavior of the bit as functions of radial, axial and tangential accelerations.

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