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利用流体力学的理论和试验方法,研究喷射钻井井底流场,研究钻头喷嘴的组合和分布方案,以获得最好的井底岩屑清除效果,可以提高钻井速度。西南石油学院建立了全尺寸井底流场台架试验装置,采用贴线观察、井底岩面压力场、排屑量等多种试验研究方法,开展了喷射钻井井底流场的研究,取得了一些新成果。得到了在不同钻头组合喷嘴的情况下,描述出井底射流存在滞流、逆流(回流)、漩流区现
Using fluid mechanics theory and experimental methods, the bottom hole flow field of jet drilling is studied, and the combination and distribution of drill bit nozzles are studied to get the best removal effect of rock bottom debris and improve the drilling speed. Southwest Petroleum Institute established a full-scale bottom hole flow field bench test device, using the observation of sticking lines, the pressure field at the bottom of the rock surface, the amount of chip removal and other experimental research methods to carry out jet drilling bottom flow field research, obtained Some new achievements. It is obtained that in the case of different combination of drill bit nozzles, it is described that there is stagnation, reverse flow (back flow) in bottom hole jet flow, swirling flow zone present