| 摘要 |
The claimed invention relates to a drilling module comprising a rotatable drilling bit, an oscillator able to apply axial HF oscillating load of up to 1 kHz frequency to the drilling bit, a vibration transmission section connecting the rotatable drilling bit to the oscillator and able to transfer axial HF oscillating load from the oscillator to the rotatable drilling bit, a vibration insulation assembly used to connect the drilling module to the drilling string and insulating the drilling string from axial HF oscillating load, sensors for measurements in the downhole, and a control device capable of operation in the downhole with feedback control in real time using said measurements in the downhole from the sensors for the oscillator control by changing the axial HF oscillating load as a response to the state of the rock through which the rotating drilling bit passes, for establishing and maintaining the resonance of the oscillating system between the oscillator, the rotating drilling bit and the rock through which the rotating drilling bit passes, so that axial HF oscillating load is sufficient to form cracks in the rock through which the rotating drilling bit passes. The claimed invention also relates to a method of the rotating device control for resonance enhanced drilling, and to a control device implementing the said method when it is installed on the said drilling module. |
