大口径气举反循环钻进有关问题的探讨

A Discussion on Some Problems of Air-Lift Reverse-circulation Large Hole Drilling

结合工程实例,对大口径气举反循环钻进特点及存在主要问题,进行了探讨;指出钻头及吸渣口的合理设计是关键,也是直接影响钻进效率的主要因素。

Dealt with engineering examples,this paper discusses some features of air-lift reverse-circulation large hole drilling and existing main problems.It points out that the reasonable design of the drillbit and the eductor of cuttings is a very important and main factor direct affecting drilling efficiency.