目前,绳索取芯钻进技术在国内已得到一定的推广应用.在中硬地层采用绳索取芯钻进技术的优越性,已被人们所公认.们在硬岩及坚硬致密岩层中,绳索取芯钻进技术迄今尚存在一些问题,突出表现为金刚石钻头“打滑”,机械钻速低,寿命短,不得不经常提钻,显示不出优越性.因此,在硬岩及坚硬致密岩层中推广绳索取芯技 At present, rope coring drilling technology in China has been a certain degree of promotion and application .In the hard formation using rope coring drilling technology superiority has been recognized .In the hard rock and hard dense rock, the rope taken Core drilling technology so far there are some problems, outstanding performance for the diamond bit “slippery”, low penetration rate ROP, short life expectancy, had to often mention drilling, showing no superiority.Therefore, the promotion of hard rock and hard and tight formations Cord core technology