龙永煤田地质构造复杂,岩性倾角变化大,断层破碎带多,在应用金刚石绳索取心工艺钻进时,常常存在着掉块、坍塌和漏失现象,造成孔内事故多,钻进效率低等问题。通过反复的实践研究,总结出根据不同的地层特性,选择适宜的钻孔口径、钻具级配和钻头型号,配制不同的冲洗液;针对地层的漏失特点和漏失量的大小,采用不同的堵漏材料的技术措施,从而初步解决了在该区钻进时遇到的技术难点,减少了孔内事故的发生,将钻月效率由430m提高到603m,取得了良好的经济效益。 Longyong coalfield is characterized by complex geological structure, large changes in lithological dip angle and large number of fault fragments. During the drilling with diamond cord coring process, there is often the phenomenon of block dropping, collapse and leakage, resulting in many accidents in the hole and low drilling efficiency And other issues. Through repeated practice and research, it is concluded that different drilling fluids, drilling gradients and bit models can be selected according to different formation characteristics, and different flushing fluids can be prepared. According to the characteristics of the strata loss and the amount of leakage, Leakage of materials and technical measures to initially solve the drilling encountered in the area encountered technical difficulties and reduce the occurrence of holes in the hole, the drilling efficiency from 430m to 603m, and achieved good economic benefits.