工程设计学报2018，Vol.25Issue(3)：262-269,8.DOI:10.3785/j.issn.1006-754X.2018.03.003
混合式单牙轮钻头破岩性能研究
Study on rock breaking performance of hybrid single cone bit
摘要
Abstract
In the course of oil drilling,high-quality drill bits play a vital role in reducing cost and improving drilling efficiency .A new hybrid single cone bit was designed by connecting the teeth palm with conical tooth and the cone with PDC teeth .The hybrid single cone bit was added with the PDC teeth based on general single cone bit,w hich broke rock by shocking and shearing .T he big end of hybrid single cone passed through the center of bottom hole,and all teeth rings contac-ted with wall of hole which could achieve gauge protection during rock breaking .A finite element model of interaction between hybrid single cone bit and rock was established,and the bottom hole model,the main cutting force and rock breaking volume were simulated and analyzed .Bench test was carried out to verify the drilling pressure and the drilling depth which were obtained by the numerical simulation .Research results showed that the drilling pressure and the drilling depth obtained by numerical simulation conformed to bench test results,and the regulation of rock breaking load was consistent with the design characteristics of the cone bit structure .Comparing with the spherical single cone bit,the side force of hybrid single cone bit was reduced by 39 .6%, and the rock breaking efficiency increased by 33% .The stability was higher when drilling using the hybrid single cone bit,and it could reduce the probability of well deviation as well .According to the results,the numerical simulation is effective to study the rock breaking law of the hybrid single cone bit, w hich provides a basis for further design and performance evaluation of the drill bit .关键词
混合式单牙轮钻头/数值模拟/侧向力/破岩效率Key words
hybrid single cone bit/numerical simulation/side force/rock breaking efficiency分类
能源科技引用本文复制引用
邓嵘,侯凯,李孟华,李向东..混合式单牙轮钻头破岩性能研究[J].工程设计学报,2018,25(3):262-269,8.基金项目
四川省科技支撑计划资助项目(2013GZX0159) （2013GZX0159）
