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专利标题：
逐级强化软煤岩强度钻进方法及钻具
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- 专利标题（英）：Drilling method and drilling tool for step-by-step strengthening soft coal rock strength
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申请号：CN201810021051.0
申请日：2018-01-10
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公开(公告)号：CN108316856A
公开(公告)日：2018-07-24
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发明人：
王永龙
, 马耕
, 周福宝
, 孙玉宁
, 王振锋
, 宋维宾
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申请人：
河南理工大学
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申请人地址：
河南省焦作市高新区世纪路2001号河南理工大学能源科学与工程学院
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专利权人：
河南理工大学
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当前专利权人：
河南理工大学
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当前专利权人地址：
河南省焦作市高新区世纪路2001号河南理工大学能源科学与工程学院
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主分类号：
E21B7/00
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IPC分类号：
E21B7/00
; E21B7/04
; E21B17/05
; E21B17/22
摘要：
本发明公开了一种逐级强化软煤岩强度钻进方法及钻具，依据逐级强化软煤岩强度钻进方法，基于煤岩坚固性系数f确定煤岩体强化级数N、分级强化长度Ln、分级强化比dq-n、煤岩钻头旋转速度νc，基于煤岩坚固性系数f、瓦斯压力p确定钻进速度νd、供风风量Qa，并确定逐级强化软煤岩强度钻具的设计形式。逐级强化软煤岩强度钻具，包括煤岩逐级强化钻头、旋转密封接头、煤岩钻头、钻杆。本发明针对软煤岩钻进技术难题，考虑煤层地质条件，发明了逐级强化软煤岩强度钻进方法及钻具，应用逐级强化软煤岩强度钻具施工钻孔，实现软煤岩“先逐级强化-后钻进”的协同钻进工艺方案，可有效改善软弱煤岩地层的钻进效果。
摘要（英）：
The invention discloses a drilling method and a drilling tool for step-by-step strengthening soft coal rock strength. According to the drilling method for step-by-step strengthening the soft coal rockstrength, a coal-rock mass strength grade N, a graded strengthening length L, a graded strengthening ratio d, a coal rock bit rotational speed v are determined based on a coal rock solidity coefficient f, a drilling speed v and an air supply volume Q are determined based on the coal rock solidity coefficient f and gas pressure p, and a design form of the drilling tool for step-by-step strengthening the soft coal rock strength is determined. The drilling tool for step-by-step strengthening the soft coal rock strength includes a coal rock step-by-step strengthening drill bit, arotary sealing joint, a coal rock drill bit and a drill rod. In view of the technical difficulties of soft coal rock drilling, the geological conditions of coal seams are taken into consideration, and the invention discloses the drilling method for step-by-step strengthening the soft coal rock strength and the drilling tool; the drilling tool for step-by-step strengthening the soft coal rock strength is applied to the construction of drilling, and the synergistic drilling process scheme of ''first step-by-step strengthening-post drilling'' of soft coal rock is realized, and the drilling effect of soft coal rock formations can be effectively improved.
