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四川地区油、气田分布范围广、埋藏深、地层坚硬、复杂。由于硬地层钻头没有过关。多年来,在四川地区钻凿油、气井,速度慢、成本高、建井周期长。此种情况与高速发展石油和天然气工业的形势,远不相适应。特别是一些岩性复杂的地层,现行系列生产的钻头中,无合适类型,钻头使用指标更低。以川南地区香溪统地层为例,这一地层主要含有胶结比较致密的石英砂岩或石英粉砂岩。岩石较硬而又具有塑性,且研磨性特别大。普通钢齿三牙轮钻头在这种地层中使用,由于钢齿不耐研磨,仅几个小时就全部磨光,平均钻头进尺仅10米左右。以后,
Sichuan oil and gas fields are widely distributed, buried deep, stratum hard and complex. Due to hard formation drill did not pass. Over the years, drilling oil and gas wells in Sichuan has been slow, costly and well-built. This situation is far from being compatible with the rapid development of the oil and gas industry. In particular, some lithological complex formation, the current series of production drill, no suitable type, bit lower use index. Taking the Xixi Formation in southern Sichuan as an example, this stratum contains mainly quartz sandstone or quartz siltstone with relatively dense cementation. Rock hard and plastic, and grinding is particularly large. Ordinary steel teeth tricone bit used in this formation, due to impatience grinding steel teeth, only a few hours on the polished, the average drill into the foot only 10 meters. after,