摘要
针对粒子冲击钻井技术中注入系统难控制、易堵塞等问题,结合理论研究、数值模拟及试验研究,设计出一种具有射流防堵功能的负压粒子注入系统。该系统主要由射流管、射流防堵喷头、负压粒子注入管、喷嘴、主管汇、调节管、调节阀及粒子注入罐等组成。数值模拟及试验结果表明,负压粒子注入系统可产生预期负压,将粒子吸入注入管内与钻井液充分混合,同时解决防堵和注入2个技术难题,实现粒子的有效注入。设计的粒子冲击钻井注入系统将大幅提高我国中西部地区深部极硬耐磨地层的钻速。
The injection system in particle impact drilling technology is difficult to control and easy to block. Therefore, a kind of negative pressure particle injection system with the jet anti-blocking function was de- signed on the basis of theoretical research, numerical simulation and experimental study. The system mainly con- sists of jet pipe, jet anti-blocking nozzle, negative particle injection pipe, nozzle, main manifold, regulation pipe, regulation valve and particle injection tank. The numerical simulation and test findings show that the system can produce the expected pressure, inhaling particles into the injection pipe to mix fully with drilling fluid. Meanwhile, the anti-blocking and injection problems are solved, achieving effective injection of parti- cles. The system designed will remarkably improve the drilling rate in extra hard and wear-resistant deep formations in China＇ s central and western regions.
出处
《石油机械》
北大核心
2013年第11期21-26,共6页
China Petroleum Machinery
基金
中国石油天然气集团公司重点科研项目"粒子冲击钻井技术研究"(2008A-2301)(2010A-4201)
山东省自然科学基金重点项目"粒子冲击钻井技术理论及关键技术研究"(ZR2010EZ004)
关键词
粒子冲击钻井
粒子注入系统
数值模拟
负压粒子注入管
射流防堵喷头
particle impact drilling
particle injection system
numerical simulation
negative pressure par-ticle injection pipe
jet anti-blocking nozzle
