松软煤层新型螺旋钻杆研制及应用

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英文篇名：Development and Application of New Spiral Drill Pipe for Soft Coal Seam 作者：谢祖平 英文作者：Xie Zuping;State Key Laboratory of Gas Disaster Detecting Preventing and Emergency Controlling;Chongqing Research Institute, China Coal Technology and Engineering Group; 关键词：松软煤层 ; 螺旋钻杆 ; 结构设计 ; 排渣 ; 护孔 英文关键词：soft coal seam;;spiral drill pipe;;structural design;;slagging;;hole protection 中文刊名：MKJX 英文刊名：Coal Mine Machinery 机构：瓦斯灾害监控与应急技术国家重点实验室;中煤科工集团重庆研究院有限公司; 出版日期：2019-07-15 出版单位：煤矿机械 年：2019 期：v.40;No.377 基金：国家重点研发计划课题(2018YFC0808004) 语种：中文; 页：MKJX201907048 页数：3 CN：07 ISSN：23-1280/TD 分类号：149-151

摘要

为解决现有钻杆在松软煤层钻进中事故频发、钻孔深度浅、成孔率低等难题,基于松软煤层钻进及现有配套设备特点,从排渣性能、护孔能力、加工工艺等方面对钻杆结构进行研究,研制出一种带弓形螺旋槽的新型螺旋钻杆。现场工业性试验中,新型螺旋钻杆替换同尺寸常规螺旋钻杆后,增加了松软煤层钻孔深度,成孔率为90%,且钻进过程中无钻杆断裂、掉钻事故发生。结果表明,新型螺旋钻杆结构设计合理,设备兼容性好,整体力学性能稳定,有利于提高井壁稳定性和排渣效率,降低卡钻、塌孔、掉钻等事故发生率。
        In order to solve the problems which are frequent accident of drilling, shallow drilling depth and low rate of built-up hole with existing drill pipes in soft coal seams,a new spiral drill pipe based on the characteristics of soft coal seam drilling and existing supporting equipment was researched from slagging,hole protection and processing technic,and the new drill pipe with arcuate spiral was developed.After replacing the same size conventional auger drill pipe in the field industrial test, the new spiral drill pipe successfully improved the drilling depth of the soft coal seam, and the rate of built-up hole reached 90%,and there was no drill pipe breakage or drilling accident in the industrial test. The results show that the new spiral drill pipe has reasonable structural design,good equipment compatibilit y and stable mechanical performance,which can improve wellbore stability and slagging efficiency and reduce the incidence of accidents such as pipe-sticking,collapsed and pipe-dropping.

引文

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