摘要
在定向井、水平井的造斜和扭方位作业中，钻头的保径侧切功能是影响钻井速度和井身质量的重要因素之一。模拟三牙轮钻头保径侧切齿形刮切破碎井壁岩石形成过渡带的运动，建立了试验装置；选择典型岩石，组合不同齿形、不同布齿结构、不同试验参数，进行了牙齿破岩及受力分析。研究结果对研究开发保径侧切功能强的造斜扭方位专用钻头具有实用价值，为合理确定保径侧切齿的齿形及布齿结构提供了技术依据。该项成果已在国内开发的第一种造斜扭方位专用钻头的设计中应用，并获得了成功。
In the drilling operation of deviating and adjusting
azimuth for directional and horizontal wells, the function of gage side-cutting of the bit is one of
the important factors affecting the rate of penetration and the quality of well profile. In this study,
the gage cutters' movement of a tricone bit was simulated, in which the gage cutters' scraping
the rock around the wellbore and the formation of transition zone were visualized. A testing
device was set up and experiments of rock failure by inserts were carried out on selected
typical rock samples and by combining various tooth shapes, various cutting structures and
different testing parameters. The suffered load on tooth was also analyzed. The result of this
study provides technical basis for determining gage cutters' shape and designing cutting
structure, and has been used with success in the design of the first tricone bit special for
deviating and adjusting azimuth in China.
出处
《西南石油学院学报》
CSCD
1999年第1期59-62,共4页
Journal of Southwest Petroleum Institute
关键词
牙轮钻头
切削
钻头
受力分析
侧切试验
tricone bit
deviating
side-cutting
simulation
force analysis
bit design
