摘要
Abstract
Because of high cost of technology in the existing sidetrack-drilling horizontal well,long working cycles and poor e-conomic problems,this paper designed a self-advancing and high-pressure water jet bit,which can break the rocks mainly with high-pressure water,and study on bits in the submerged-condition experiment.Meanwhile,the different working pressure,the number of turbine blades and working time are researched,which affects the drilling ability of self-advancing and high-pressure water jet bit.In the end,the best structure parameters of bits are obtained in the process.The experimental results showed that compared with the ordinary jet bit,self-advancing and high-pressure water jet bit can drill deeper,bigger,more regular,and has higher stability at work.In the meantime,In some scope,the greater the working pressure of the jet is,the better the bit drills;as the number of turbine blades increases,the drilling diameter decreases linearly,and the drilling depth increases approximately like quadratic curve.Taking into the difficulty of blade manufacturing,the most appropriate number of blades is 4.The research provides the scientific basis for the selection of jet bit in the horizontal radial wells,which has important engineering significance in increasing drilling efficiency and cutting down the cost.关键词
高压水力射流/自进式钻头/径向水平井/钻孔效果/试验研究Key words
high-pressure water jet/self-advancing bit/horizontal radial well/drilling effect/experimental study分类
机械制造
