我们采用孕镶金刚石钻头进行液动冲击—回转钻进。钻头水路是依据钻头外环状间隙冲洗液上返速度所需要的冲洗液量，以及冷却钻头使水口部位保持一定的流速所需要的冲洗量来设计的。实测和计算一个新钻头出水口面积为1.8平方厘米。又根据经验，水口部位的流速要能很好冷却钻头，大约在4—9米/秒范围为宜。若按中间值计算，约需要泵量65升/分，而在金刚石冲击回转钻进中，要维持冲击器正常工作所需要的泵量往往大于100升/分，如果把冲击器工作 We used hydrogel impact impregnated diamond bits - rotary drilling. Drill waterway is designed based on the amount of flushing fluid required for the uphole return fluid velocity at the outer annular gap of the drill bit and the amount of flush required to cool the nozzle area at a constant flow rate. Measured and calculated A new drill outlet area of ​​1.8 square centimeters. According to experience, the nozzle part of the flow rate to be able to cool the drill bit, about 4-9 m / s range is appropriate. If the median calculation, about the pump volume of 65 liters / min, and diamond impact rotary drilling, to maintain the normal operation of the impactor hammer pump often requires more than 100 liters / min, if the impactor work