Automatic control of the tool feed ( E21B44/10 take precedence)

Full Title

Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions > Automatic control of the tool feed ( E21B44/10 take precedence)

Child Classifications

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• E21B 44/04 in response to the torque of the drive
• E21B 44/06 in response to the flow or pressure of the motive fluid of the drive
• E21B 44/08 in response to the amplitude of the movement of the percussion tool, e.g. jump or recoil