| 砂卵石层旋冲挤密钻进机具研究与应用 |
| 投稿时间：2014-01-15 修订日期：2014-01-15 点此下载全文 |
| 引用本文：时元玲,孙友宏,王清岩,等.砂卵石层旋冲挤密钻进机具研究与应用[J].钻探工程,2014,41(4):64-66,78.SHI Yuan-ling,SUN You-hong,WANG Qing-yan,et al. Research and Application of Rotary-percussion-extruding Drilling Equipment in Gravel with Sand Formation[J]. Drilling Engineering, 2014,41(4):64-66,78. |
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| 基金项目:中国水利水电第十工程局技术开发课题,贵州省科技攻关课题 |
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| 中文摘要:针对松散地层自稳能力差，因钻孔掉块、缩径等引起提钻遇卡的问题，设计了PDH-130型新型双向旋冲挤密钻具，利用浮动芯管改变活塞配气行程，实现正向冲击回转挤密钻进及提钻时的反冲击功能。根据现场试验情况，对双向冲击矛结构进行了改进，以满足砂土、砂卵石等复杂地层旋冲挤密钻进施工要求。 |
| 中文关键词:旋冲挤密钻进 双向冲击矛 复杂地层 |
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| Research and Application of Rotary-percussion-extruding Drilling Equipment in Gravel with Sand Formation |
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| Abstract:To deal with the poor self-stability of loose formation and drill tools sticking caused by block-falling and hole shrinkage, new PDH-130 bidirectional rotary-percussion-extruding mole is designed by using the floating core tube to change impact piston stroke and achieve the reverse impact function when normal rotary-percussion-extruding drilling and drill pipe lifting are conducted. On the basis of the field tests, improvement is made on the structure of PDH-130 bidirectional impact mole to meet the construction requirements of rotary-percussion-extruding drilling in sand, gravel and other complex formations. |
| keywords:rotary-percussion-extruding drilling bidirectional impact mole complex formation |
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