FIELD: oil and gas production.
SUBSTANCE: invention refers to oil-field boring, particularly to self-contained drilling rig and to remotely controlled drilling robot devices used at well boring. The drilling device consists of a concentrically divided bore bit; also an internal bore bit rotates simultaneously with external bore bit in the opposite direction. The internal bore bit can move forward in axial direction to the external bore bit or backward from it. Forces created by internal and external bore bits are adjusted to eliminate or correct torque reaction.
EFFECT: preventing drops of driving rate caused by objectionable rotating of drilling rig and initiating required deflection of bore bit.
20 cl, 15 dwg
