Abstract: A new drill bit nozzle is presented in this paper with respect to the principle of oscillation, physical and mathematical models and the results of in-house and field tests.Addition of such a nozzle can generate strong pressure oscillation to enhance bottom hole hydrodynamic force, pressure gradient and well bore pressure potential,resulting in rock fracturing and bottom clean-up. Under the same operating conditions, the penetration rate can be increased by 35.5-77%, the bit footage by 6-44%.

摘要： 对石油钻井钻头新型喷嘴的研究,包括振荡原理、物理和数学模型以及室内和现场试验结果进行了讨论.试验结果表明,钻头上安装了喷嘴,在井底能产生强热的压力振荡,使井底液动力压力梯度、墙壁压力势增大,有利于破碎岩石和清除井底岩屑.而且在相同条件下可以提高机械钻速35.5～77%、钻头进尺6～44%.

关键词: 喷射钻井, 自激振荡, 射流, 喷嘴