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应用于中曲率水平井的钻具倒装结构钻具倒装结构常用于中曲率水平井二次增斜井段以及以后各井段的施工。常见的钻具组合有三种。分别是：用于造斜井段的钻具组合：钻头＋扶正器＋无磁钻铤一根＋ＭＷＤ专用短节＋无磁钻铤一根＋钻杆（０～１．０ｍ）＋加重钻杆（８０～３０...
Applied to the curvature of the horizontal wells in the drill down the structure of the drill down structure is commonly used in horizontal wells in the second increase of the incline and later sections of the well construction. There are three common combinations of drilling tools. They are: Combination of drilling tools used to make the inclined section: Drill + centralizer + a non-magnetic drill collar + a MWD special short section + a non-magnetic drill collar a + drill pipe (0 ~ 1.0m) + heavy drill pipe (80 ~ 30 ...