地浸砂岩型铀矿致密泥岩齿形复合片钻头的研究与应用  

Research and Application of Serrate Composite Bits to Drilling at Dense Mudstone in Uranium Deposits of Disseminated Sandstone type

作　　者：要二仓[1] 邢预恩[2] 张富兰[1] 杨爱军[1] 

机构地区：[1]核工业二0八大队,内蒙古包头014010 [2]内蒙古科技大学,内蒙古包头014010

出　　处：《地质与勘探》2011年第2期316-322,共7页Geology and Exploration

基　　金：中国核工业地质局"地浸砂岩型铀矿硬致密泥岩地层钻头的研究与应用"生产中科研项目(编号DK2009)

摘　　要：针对地浸砂岩型铀矿钻探中致密泥岩钻进效率低的问题,在内蒙古巴音戈壁盆地研究试验了齿形复合片钻头与圆片状复合片钻头,提高了钻进效率。对研磨性较弱,中等硬度致密泥岩,采用Φ104mm双环式齿形复合片钻头(六组)的钻进效率达到2.60m/h,比普通复合片钻头提高73%;采用Φ110mm双环式平底齿形复合片钻头(四组)的钻进效率达到2.58m/h,比普通复合片钻头提高27%。对研磨性较强,硬致密泥岩,采用Φ110mm双环式阶梯齿形复合片钻头(八组)的钻进效率达到3.31m/h,比普通复合片钻头提高25%;Φ110mm双环式平底齿形复合片钻头(八组)的钻进效率达到4.38m/h,比普通复合片钻头提高20%。To solve the problem of low drilling effeciency at dense mudstone in uranium deposits of disseminated sandstone type,we have conducted in situ tests of the serrate and circular-plate composite bits in the Bayingebi basin of Inner Mongolia.For the dense mudstone of weak abrasive resistance and intermediate hardness,we employed Φ104mm double-ring serrate composite bits （six sets）,yielding a drilling rate 2.60m/h,enhancement of 73% compared with common composite bits.When we used Φ110mm double-ring serrate composite bits with a flat bottom （four sets）,the drilling rate reached 2.58m/h,increased by 27% compared with general ones.For the dense mudstone of relatively strong abrasive resistance and big hardness,we utilized Φ110mm serrate composite bits of double-ring and step style （eight sets） to obtain a drilling rate 3.31m/h,an increase of 25% than usual.And the drilling rate of the Φ110mm serrate composite bits of double-ring and flat bottom style （eight sets） was as high as 4.38m/h,enhanced by 20% in comparison with general composite bits.

关 键 词：致密泥岩 钻进效率 齿形复合片钻头 

分 类 号：P634.4[天文地球—地质矿产勘探]