| 偏重钻铤在丁集矿冻结造孔施工中的应用 |
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| 引用本文： | 翟正峰. 偏重钻铤在丁集矿冻结造孔施工中的应用[J]. 中国煤田地质, 2007, 19(1): 76-77 |
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| 作者姓名： | 翟正峰 |
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| 作者单位： | 安徽煤田地质局第三勘探队 安徽 |
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| 摘 要： | 钻井技术的关键是预防及控制孔斜,通过对目前常用4种防斜钻具组合的适岩性、井深、井斜及钻效等指标对比,在冻结造孔施工中选用了适用地层广、防斜性能好并具有纠斜作用的偏重钻铤。为发挥偏重钻铤的防斜作用,宜增大转速,并使钻铤减去部分的重量应位于离轴线尽可能远的部位。在淮南丁集冻结孔施工的三十多口钻孔中,井斜一般均在0．5°以内,钻效超过2400m/台·月。
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| 关 键 词： | 钻探技术 防斜 偏重钻铤 冻结造孔 丁集矿 |
| 文章编号： | 1004-9177（2007）01-0076-02 |
| 收稿时间： | 2004-09-29 |
| 修稿时间： | 2006-05-30 |
Application of Bias Weighted Drill Collar in Dingji Coalmine Freezing Well Construction |
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| Zhai Zhengfeng. Application of Bias Weighted Drill Collar in Dingji Coalmine Freezing Well Construction[J]. Coal Geology of China, 2007, 19(1): 76-77 |
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| Authors: | Zhai Zhengfeng |
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| Abstract: | The key technique of freezing well construction is well deviation control.Drilling tool combination in common use has pendulum drilling tool,bias weighted drill collar,full-hole drilling tool and tower-type drilling tool.Through contrast of rock applicability,well depth,well deviation and drilling efficiency,bias weighted drill collar had chosen for its broad rock applicability,approved deviation preventing and rectifying performances.For the purpose of deviation preventing,rotation rate need to be speeding up,and drill collar reduced part of weight deviate from center line as far as possible.Well deviations of all the 30 more drilled freezing wells in Dingji coalmine,Huainan are within 0.5o,drilling efficiency in excess of 2400m/rig? month. |
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| Keywords: | drilling technique deviation preventing bias weighted drill collar freezing well construction Dingji eoalmine |
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