摘要
为解决常规PDC钻头在定向作业时产生的反扭矩大而造成工具面不稳定、造斜作业时常常停顿的问题,中国石油渤海装备中成机械制造公司研究开发了一种特殊的定向PDC钻头。该定向PDC钻头采用紧凑型结构设计、应用低扭矩高效破岩理论、预破应力布齿和井底流场仿真计算等技术,减少了切削反扭矩对定向工具面的影响,钻进扭矩变化小、工具面摆放稳定、定向能力强、造斜效果好、机械钻速快、使用寿命长、技术水平先进,定向效果处于国内领先水平。定向PDC钻头作为特性钻头的一种,应用前景十分广阔。
Directional PDC bit is mainly used to solve a series of problems in directional wells,including big anti-torque,unstable tool surface and occasional pauses of deflecting operation.With compact structure,the bit is designed based on the low-torque and high rock breaking theory,the re- broken tooth placement technique and the bottom flow field simulation technique.Using the bit,the impact of cutting anti-torque on directional orientation tool surface is minimized,drilling torque changes little,tool surface is placed stably and it has effective directional capability,good deflecting effect,fast ROP and long life.Directional PDC bit,as a characteristic bit,has a broad application prospect.
出处
《石油科技论坛》
2011年第2期61-62,65,共3页
PETROLEUM SCIENCE AND TECHNOLOGY FORUM
基金
"定向PDC钻头研制"(项目编号:C-09M030011)
关键词
PDC
钻头
定向
钻井
PDC bit
directional
drilling
