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1977年我院探工七七级结业队与安徽B08队组成攻关小组,对钻进含石膏地层的泥浆处理问题进行了研究。在某矿区施工CK3号孔时,泥浆只作了一般处理(表1),就能较顺利地通过第四系的冲积层以及坍塌掉块、遇水稍有膨胀的三迭系黄马青砂页岩地层。钻进至640米时,曾因停电,钻具在孔内停放八小时后,仍能顺利提钻与钻进。但井深在647米时,又因
In 1977, our hospital cadets seventy-seven graduation team and the Anhui B08 team composed of research teams, drilling into the gypsum-containing mud treatment problems were studied. In the construction of CK3 hole in a mining area, the mud only for general treatment (Table 1), will be able to more smoothly through the Quaternary alluvial layer and the collapse of the block, water slightly expanded Triassic yellow horse sand Shale formation. Drilling to 640 meters, was due to power outages, drilling in the hole parked eight hours later, still smooth drilling and drilling. But when the depth of 647 meters, because of