Improvement on Self-release Percussive Grab Technique for Large Diameter Drilling in Gravel Layer
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尹江, 李文斌, 台沐礼, 林洪飞. 卵砾石层大口径钻探中冲抓锥工艺的改进[J]. 钻探工程, 2008, (12): 66. doi: 10.3969/j.issn.1672-7428.2008.12.020
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| Citation: |
Improvement on Self-release Percussive Grab Technique for Large Diameter Drilling in Gravel Layer[J]. DRILLING ENGINEERING, 2008, (12): 66. doi: 10.3969/j.issn.1672-7428.2008.12.020
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