摘要
研制了一种钻头腔内转子调制式脉冲钻井工具,其原理是将一个直径与钻头腔内径接近、表面加工有螺旋流道的圆柱形转子置入钻头腔内,钻井液通过螺旋流道时驱动转子旋转,随着转子的旋转,其流道内的钻井液被周期性分配到钻头不同的喷嘴中,形成脉冲射流作用于井底。以射流轴心压力脉动的幅值和射流破岩效果为优化目标,试验确定了转子的结构参数。现场试验结果表明,所研制的工具原理正确、参数合理、结构可靠,可显著提高机械钻速,具有广阔的现场应用前景。
A rotor-modulated hydraulic pulse drilling tool in thebit cavity has been developed. The principle of the tool is to locate a cylindrical rotor in the bit cavity, which has a close diameter with the inside diameter of bit cavity and is processed spiral flow channel at surface. When drilling fluid flows through the spiral channel, the rotor can be drived to rotate. With its rotation, the drilling fluid in flow channel can be periodically allocated to different nozzles of drilling bit, and consequently form pulse jet to act on the bottom hole. With the objective to optimize the pressure fluctuating amplitude on jet axes and the effect of rock disintegration for the tool, the texture parameters have been experimentally verified. Field experiment results manifest that the tool has valid philosophy, reasonable parameters and reliable structure. It can prominently improve the drilling rate and shows a wide prospect in field application.
出处
《钻采工艺》
CAS
北大核心
2006年第2期62-65,共4页
Drilling & Production Technology
基金
中国石油天然气集团公司石油科技中青年创新基金项目(编号:04E7042)
中国博士后科学基金资助项目(编号:2004035692)的部分成果
关键词
水力脉冲
钻井工具
转子
钻头腔
岩石破碎
试验研究
机械钻速
hydraulic pulse, drilling tool, rotor, bit cavity, rock disintegration, experimental research, penetration rate
