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在脆、碎、风化的松散粒状、松软沉积岩,以及易被水冲毁和遇水膨胀缩径、坍塌等岩矿层中钻进,特别是在缺水地区,冲洗液大量漏失以至无法保证钻探工作顺利进行的部分坍塌、难采心井段,无泵钻进是提高岩矿心采取率,保证钻探质量和顺利通过复杂地层的一种有效钻进方法.以往使用一般的无泵钻具只能进行无泵钻进,却不能泵送冲洗液扫孔、护壁、排粉,因而井下岩粉过多,需先冲、排,然后钻进.在井壁不稳定,需先用泥浆维护的情况下,便显得无能为力,以致常常出现钻粉和岩矿心混杂,不得不和普通钻具交替使用.在孔深时,会导致钻探效率下降,甚至影响钻探工作的顺利进行,同时大大增加工人的劳动强度.为了解决这些矛盾,我们经过反复研究,试制成功了一种既能泵送冲洗液进行正常扫孔、
In the brittle, fragmented, weathered loose granular, soft sedimentary rock, and easy to water erosion and shrinkage expansion, collapse and other rock and drilling, especially in water-scarce areas, a large loss of irrigation fluid and can not guarantee drilling work The smooth progress of the part of the collapse difficult to adopt heart-well section, non-pump drilling is to improve the rate of rock and mineral core to ensure the quality of drilling and smooth through the complex formation of an effective drilling method. In the past using a general non-pump drilling only No pump drilling, but can not pump flushing fluid cleaning, protecting the wall, row powder, and therefore too much downhole rock, the need to red, row, and then drilling in the borehole instability, the need to use mud maintenance , It becomes incapable of action, resulting in the frequent occurrence of mud and rock mixed heart and had to alternate with ordinary drilling tools in deep hole, it will lead to reduced drilling efficiency, and even affect the smooth progress of drilling, while greatly increasing the workers Labor intensity.In order to solve these contradictions, we after repeated research, trial success of a can not only pump the rinse fluid for normal hole cleaning,