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This page displays all 「FI」 in main group E21B44/00. |
HB:Handbook | ||||
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CC:Concordance | |||||
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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 [2006.01] | HB | CC | 2D129 | |
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Automatic hole drilling control (E21B 44/02 to E21B 44/10 take precedence) | HB | CC | 2D129 | |
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Others | HB | CC | 2D129 | |
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.Automatic control of the tool feed (E21B 44/10 takes precedence) [7] | HB | CC | 2D129 | |
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..in response to the torque of the drive [7] | HB | CC | 2D129 | |
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..in response to the flow or pressure of the motive fluid of the drive [7] | HB | CC | 2D129 | |
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..in response to the amplitude of the movement of the percussion tool, e.g. jump or recoil [7] | HB | CC | 2D129 | |
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.Arrangements for automatic stopping when the tool is lifted from the working face [7] | HB | CC | 2D129 | |