摘要
在分析煤层深孔钻进困难原因的基础上,提出"钻穴"概念,分析了"钻穴"对钻进的影响。在分析"钻穴"类型及成因的基础上,建立"钻穴"内流体排渣模型,采用数学方法,分析钻孔深度和"钻穴"的关系。结果表明:在纯流体排渣情况下,松软、突出煤层的钻孔深度几乎与钻机动力大小无关,而取决于危害型"钻穴"的发生位置和"钻穴"的体积大小。基于对"钻穴"的新认识,提出流体与机械协同排渣的新观点,以此克服或减轻"钻穴"的危害,并发明了"双动力低螺旋钻杆"。
Presented the concept of ＂hole cave＂ based on analysis of reasons of deep hole drilling difficulty,and analyzed the effect of drilling due to ＂hole cave＂ formation.On the basis of the analysis ＂hole cave＂ types and causes,established fluid slag discharge model in ＂hole cave＂,mathematical methods was used to analyze the relationship between drilling depth and ＂hole cave＂.The analysis shows that the borehole depth is independent of the power of drilling rigs,and is related to the occurrence location and volume of the ＂hole cave＂ in the case of fluid slag discharge.Put forward a new viewpoint of hydrodynamic and mechanical slag discharge in order to overcome and reduce the harm of hole caves,and invented ＂double power low-spiral drilling rod＂.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2012年第1期117-121,共5页
Journal of China Coal Society
关键词
松软煤层
突出煤层
钻穴
钻杆
soft coal seam
outburst coal seam
hole cave
drilling rod
