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我队某钻探施工区,地层软硬互层变化频繁.上下板岩呈板状结构,片理发育,岩层倾角60～70°,岩石具有硬、脆、碎等特点.长期以来,钻孔方位跑斜严重,钻孔质量得不到保证,给施工带来很大的影响.为此,也曾采用过许多纠斜方法,但奏效不大.近两年来,由于采用了金刚石钻进技术,使钻探效率得到明显地提高,相应之下,该区的孔斜问题更加突出.如近期施工的Z K622、ZK132、Z K 172孔,方位偏斜都比较严重根据上述情况,进行了反转法纠方位的试验工作.
The construction of a certain drill drilling area in our team changed frequently between hard and soft layers of the strata.The upper and lower slate are plate-like structure, with the development of the slab, the rock dip angle is 60 ~ 70 °, the rock has the characteristics of hard, brittle, broken etc. For a long time, Run ramp serious drilling quality can not be guaranteed, to bring a great impact on the construction.To this end, have also adopted many correction methods, but not effective.In the past two years, due to the use of diamond drilling technology, So drilling efficiency has been significantly improved, corresponding to the hole slanting problems more prominent in the area such as the recent construction of ZK622, ZK132, ZK172 holes, the orientation is more serious According to the above situation, the inversion method of correction Orientation test work.