青海野马泉矿区钻头水口改进的研究

Study on the Improvement of Bit Water Outlets in Yemaquan Mine of Qinghai

青海野马泉矿区在钻探生产中通常采用大钻压、高线速度的钻进规程。由于在钻进过程中单位时间内产生的岩粉量多、摩擦生热快且难以排出,常出现钻头非正常磨损现象,导致钻头提前失效,使得提下钻频繁,严重影响施工进度。根据现场地层情况和工艺条件设计了钻头,改进了钻头配方和钻头制造工艺,将钻头水口进行了适当的加宽。数值模拟分析和野外试验结果表明,适当加宽水口可以有效地排粉、降温和提高钻头寿命。

High RPM and large pressure drilling parameters were usually adopted in the exploration drilling in Yemaquan mine of Qinghai. Since too much cuttings and heat are produced in the unit drilling time, the early failure of diamond bit is often caused by the abnormal wearing, and the construction schedule is seriously affected. The diamond bit was designed and the matrix formula and manufacturing technology were improved based on the geological and technical conditions in the field, the water outlet is appropriate widened. The results of numerical modeling analysis and field test show that the cutting removing, temperature and diamond bit service life are effectively improved.