高位定向长钻孔钻进工艺研究  

Study on drilling technique of high level directional long borehole

作　　者：闫保永[1,2] 

机构地区：[1]中国煤炭科工集团重庆研究院有限公司,重庆400039 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400039

出　　处：《煤炭科学技术》2016年第4期55-58,共4页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2011ZX05041-001-002)

摘　　要：为了有效抽采邻近层和采空区瓦斯,提出了采用高位定向长钻孔替代顶板高抽巷进行瓦斯抽采,针对红阳三矿钻进施工时,推进阻力大等问题,进行了定向钻孔与回转扩孔相结合的钻进工艺试验,及不同弯度孔底马达与不同直径钻头组合的钻进工艺试验。试验结果表明:3-5号钻孔采用1.25°弯头孔底马达配备φ96 mm钻头钻进,钻进至350 m出现推进阻力大的问题,采用φ153 mm钻头扩孔至320 m,可以多钻进约120 m;3-2号钻孔采用1.25°弯头孔底马达配备φ104 mm钻头钻进,钻孔深度610 m;3-3号钻孔采用1°弯头孔底马达配备φ100 mm钻头钻进,钻孔深度616 m,通过减小孔底马达弯头角度、增大钻头直径均可以有效减小推进阻力,明显增加钻孔深度。In order to effectively drainage gas from the neighboring seams and the goaf,high level directional long borehole was proposed to be applied to replace the roof high level gas drainage gateway for gas drainage. According to a high resistance of the drilling and other problems in the drilling construction in Hongyang No. 3 Mine,a drilling technical experiment combined with the directional drilling and borehole rotary reaming and a drilling technical experiment on the different camber down hole motor and different diameter drilling bit was conducted. The experiments showed that a 1.25° bending down hole motor with a φ96 mm drilling bit was applied to No. 3- 5 borehole drilling,a high pushing resistance problem occurred at the 350 m of the drilling,a φ153 mm drilling bit was applied to the reaming of the borehole to 320 m,which could drill an additional length of 120 m. A 1.25°bending down hole motor with a φ104 mm drilling bit was applied to No. 3-2 borehole drilling and the borehole depth was 610 m. A 1°bending down hole motor with a φ100 mm drilling bit was applied to No. 3-3 borehole drilling and the borehole depth was 616 m. The bending angle reduced down hole motor and the drilling bit diameter increased could effectively reduce the pushing resistance and could obviously increase the drilling depth.

关 键 词：定向钻孔 扩孔 高位钻孔 孔底马达 

分 类 号：TD712[矿业工程—矿井通风与安全]