Research on a drill-jamming accident and geological logging after mixture of oil and drilling fluid in a deviated well

Sticking of tool is commonly regarded as a kind of drilling accident. It can make drilling operation block and lead to economic loss. Mud clung sticking happened in a deviated well during drilling operation. The logging team did a lot of work to deal with the drilling accident. The depth of sticking point and amount of oil emulsion drilling fluid have been calculated in the paper. The depth of sticking point was about 667 meters and amount of oil emulsion drilling fluid was 32.0m³. 11 hours after drill-jamming accident happened, unstuck drilling was carried out successfully. The whole process of drilling accident, logging after oil emulsion drilling fluid have been systematicaey reflected and summarized. It will provide some valuable information for drilling deviated wells.