| 大孔径瓦斯抽放井施工中井内落物打捞 |
| |
| 引用本文： | 程志远,迟波,王泽山,赵丽华,孔令珍.大孔径瓦斯抽放井施工中井内落物打捞[J].中国煤炭地质,2008,20(3):65-66. |
| |
| 作者姓名： | 程志远 迟波 王泽山 赵丽华 孔令珍 |
| |
| 作者单位： | 程志远（东北煤田地质局103勘探队,辽宁,辽阳,111000）;迟波（东北煤田地质局103勘探队,辽宁,辽阳,111000）;王泽山（东北煤田地质局103勘探队,辽宁,辽阳,111000）;赵丽华（东北煤田地质局103勘探队,辽宁,辽阳,111000）;孔令珍（东北煤田地质局103勘探队,辽宁,辽阳,111000） |
| |
| 摘 要： | 华晋焦煤沙曲矿瓦斯抽放井设计井深405．00m、井径φ700mm，在二次成井中靶后利用自制φ700mm三牙轮组合钻头进行扩孔作业。扩孔作业至150m时，发生三翼牙轮组合钻头掉翼事故，经探查发现井内落物落至井深295m处。根据下落物的重量、形状及井身结构，设计制作了套铣打捞器。自制的套铣打捞工具直径为φ420mm，大小与二开井径较接近，与井壁环空较小，为避免发生二次卡钻事故，采用先扩孔至井中落物，再进行套铣打捞作业的方式施工。打捞采用气举反循环方式，慢转、轻放，经过反复套铣打捞，将二块井中落物打捞出井，事故处理比较成功。
|
| 关 键 词： | 大孔径钻井 瓦斯抽放井 三牙轮组合钻头 套铣打捞器 事故处理 |
| 文章编号： | 1674-1803(2008)03-0065-02 |
| 修稿时间： | 2007年7月30日 |
Fishing and Processing of Down-hole Falling off During Large-scale Gas Drainage Well Drilling |
| |
| Cheng Zhiyuan,Chi Bo,Wang Zeshan,Zhao Lihua,Kong Lingzhen.Fishing and Processing of Down-hole Falling off During Large-scale Gas Drainage Well Drilling[J].Coal Geology of China,2008,20(3):65-66. |
| |
| Authors: | Cheng Zhiyuan Chi Bo Wang Zeshan Zhao Lihua Kong Lingzhen |
| |
| Institution: | (No.103 Exploration Team, Northeast China Bureau of Coal Geological Exploration, Liaoyang, Liaoning 111000) |
| |
| Abstract: | Designed well depth of gas drainage well in Shaqu coalmine of Huajin Coking Coal Company is 405.00m with diameter φ700mm, using our own making φ700mm tri-cone combination bit carried out reaming operation after second hole-in target hitting. When the reaming operation was carrying out to 150m depth, the tri-cone combination bit had fallen off to 295m depth. According to the falling body weight, shape and well structure, designed washover milling fishing tool. Diameter of the fishing tool is φ420mm, similar to second hole-in diameter, thus has smaller annular space to the sidewall. To avoid secondary sticking of drill tools, reaming to the falling body first, then carried out washover milling operation. Mr-lift reverse circulation was used in fishing operation, and repeated the milling and fishing operation time and again with slow turning and handles with care, two blocks of falling body had fished out, in this way, the down-hole accident cleared away successfully. |
| |
| Keywords: | large-scale bore well gas drainage well tri-cone combination bit washover milling fishing tool settlement of accident |
| 本文献已被 维普 等数据库收录！ |
|
