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我队地层复杂,大部份漏水严重,钻进困难,岩心采取率低.为此,我们试用了105队外铇槽钻头(图1)获得成功.经某机钻进6～7级矽化泥质砂岩证明该钻头较普通钻粒钻头提高钻探效率与岩心采取率一倍以上.
For the reason that we have successfully tested 105 formations of the outer grooved drill bit (Figure 1), we have successfully drilled 6- to 7-stage silicified mud Quality sandstone proves that the drill bit is more than double the drilling efficiency and the core recovery rate than the ordinary drill bit.