软煤钻杆研究进展及发展趋势

Research progress and development tendency of borehole drilling rod for soft seam

针对软煤钻杆研究及应用现状,基于不同的钻杆形式及排粉动力方式,介绍了不同钻杆的定义、适用范围、优缺点、排粉动力模型,并对软煤钻杆发展历程进行分析。通过对软煤打钻研究工作的分析,指出研究工作中的不足之处:软煤流变研究成果与软煤钻孔理论结合不足;排粉动力学及耦合排粉问题研究工作亟待深入;钻杆表面降阻问题未受足够重视;软煤钻孔孔壁固化研究发展缓慢;整体式成型技术有待推广。同时,指出了软煤钻杆的发展趋势,包括多动力耦合、多结构耦合、高强度钻杆、智能钻杆等方向。

According to the study and application status of soft seam drilling rod,based on the different drilling rod mode and the dust removal dynamic mode,the paper introduced the definition,application scope,advantage and disadvantage,dust removal dynamic model of the different drilling rod and analysed the development course of soft coal drilling rod. With the analysis on the study work of soft coal drilling,the paper pointed out the disadvantages of the study work. The study results of the soft coal rheology and the soft coal drilling theory were not sufficiently integrated. The study work on the dust removal dynamics and coupling dust removal problem should be conducted deeply. The resistance reduction problem of the rod surface could not sufficiently be in attention. A study on consolidation of the borehole wall in soft seam was slowly progressed. The integrated prototyping technology was to be promoted. Meanwhile,the paper pointed out the development tendency of the soft seam drilling rod,including the multi power coupling,multi structure coupling,high strength drilling rod,intelligent drilling rod and other orientation.