Φ215.9mm四牙轮取心钻头设计与应用  

Design and application of Φ215.9mm four-cone coring bit

作　　者：赵明 邵玉涛[1] 宋刚[1] 崔淑英[1] 牛庆磊[1] 王嘉瑞[1] ZHAO Ming;SHAO Yutao;SONG Gang;CUI Shuying;NIU Qinglei;WANG Jiarui(Institute of Exploration Techniques,CAGS,Langfang Hebei 065000,China)

机构地区：[1]中国地质科学院勘探技术研究所,河北廊坊065000

出　　处：《钻探工程》2022年第1期41-48,共8页Drilling Engineering

基　　金：中国地质调查局地质调查项目“深海钻探技术与工程支撑(中国地质科学院勘探技术研究所)”(编号DD20190585)。

摘　　要：针对硬岩及复杂地层取心钻进效率低、钻头寿命短的问题,依托“深海钻探技术与工程支撑”项目研制了Φ215.9 mm四牙轮取心钻头。通过合理布置牙轮角度与分布、优化取心结构,有效提高岩心采取率,保证钻头在硬岩中的钻进速度与可靠性。在之前进行了陆地试验和海洋试验并不断优化改进的基础上,本次在内蒙古自治区呼和浩特市清水河县首次进行了实验性的地热勘探取心施工,全段地层均为高研磨性、高硬度花岗岩,取心困难。采用Φ215.9 mm牙轮取心钻头配合常规的取心钻具,钻进效率达1.2 m/h,岩心采取率为70%~90%,取得了较好的应用效果,为海洋钻探硬岩取心提供了技术保障。The Φ215.9 mm four-cone coring bit is a cone coring bit designed and produced under the project of "Deep Sea Drilling Technology And Engineering Support",and is mainly used for high-efficiency and long-run coring in hard rock and complex strata. By reasonably arranging the cone angle and distribution,and optimizing the coring structure,core recovery can be effectively improved to ensure the drilling rate and reliability of the bit in hard rock. Land test and marine test had been conducted for continuous optimization and improvement of the bit;and experimental geothermal exploration coring was carried out for the first time in Qingshuihe county,Hohhot city,Inner Mongolia autonomous Region. The whole coring section is granite of high abrasiveness and high hardness,and difficult to core. With the combination of the Φ215.9 mm cone coring bit with conventional coring tools,drilling speed reached 1.2 m/h with core recovery of 70%~90%. It has good application value and can provide technical support for marine drilling hard rock coring.

关 键 词：四牙轮取心钻头 复杂地层 钻进效率 钻头寿命 地热勘探井 海洋钻探 硬岩取心 

分 类 号：P634.4[天文地球—地质矿产勘探]