保径导向扩孔钻头的设计及其工程应用 |
投稿时间:2018-12-28 修订日期:2019-03-07 点此下载全文 |
引用本文:何玉云,王发民.保径导向扩孔钻头的设计及其工程应用[J].钻探工程,2019,46(11):50-53.HE Yuyun,WANG Famin. Design and field use of the gauge-protected pilot reaming bit[J]. Drilling Engineering, 2019,46(11):50-53. |
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基金项目:宁夏回族自治区第八批地勘基金项目“灵武幅、磁窑堡幅1∶5万综合地质调查项目”(编号:2017NCZ001803W) |
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中文摘要:岩心钻探中,在砾石(漂砾)等破碎地层采用常规三翼扩孔钻头扩孔时,常出现憋车和卡钻现象,且扩孔效率低。为此,设计了具有导向和保径功能的扩孔钻头。新设计的扩孔钻头在宁夏灵武一个综合地质孔进行了应用,扩孔效果良好,平均扩孔效率3.5 m/h,形成的新孔眼与原孔眼同轴度高,孔径规则,下套管顺利,对第四系破碎地层进行了有效分隔,保障了后续取心钻进和物探测井的顺利进行。 |
中文关键词:岩心钻探 破碎砾石层 钻头保径 导向扩孔 扩孔钻头 |
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Design and field use of the gauge-protected pilot reaming bit |
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Abstract:During core drilling, blockage and sticking often occurs when conventional three-wing reaming bits are used for reaming in broken strata such as gravel (boulder), which results in low reaming efficiency. For this purpose, a reaming bit with guiding and gauge protection functions was designed, and was applied in a comprehensive geological hole in Lingwu, Ningxia, with good reaming effect, and the average reaming footage up to 3.5m/h. The reamed hole was highly coaxial with the original hole, and had a regular gauge, leading to smooth casing running. The Quaternary broken formation was effectively separated to ensure smooth performance of subsequent core drilling and geophysical logging. |
keywords:core drilling broken gravel bed gauge-protected bit guiding reaming reaming bit |
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