CAJ | 학술논문

承德闫营子地热井钻遇地层坚硬、造斜、岩性复杂，施工难度较大。施工期间，采用了螺杆钻具完成事故处理、纠斜、复合钻进工作。分析了螺杆钻具在3种工况下的使用效果；应用MD钻头解决了硬岩钻进常规钻头磨损严重的问题；最后针对钻进中存在的钻速低、钻铤断裂问题，提出了改进建议。
승덕염영자지열정찬우지층견경、조사、암성복잡，시공난도교대。시공기간，채용료라간찬구완성사고처리、규사、복합찬진공작。분석료라간찬구재3충공황하적사용효과；응용MD찬두해결료경암찬진상규찬두마손엄중적문제；최후침대찬진중존재적찬속저、찬정단렬문제，제출료개진건의。
Hard formation was encountered in Yanyingzi geothermal well of Chengde where there were deviating force and complex lithology, the construction was difficult.Screw drill was adopted in accident treatment, deviation correction and compound drilling;the effects of screw drill application under these 3 working conditions are analyzed.Serious wear of con-ventional bit in hard rock drilling, low drilling speed and drilling collar fracture are solved by MD bit, and some improve-ment suggestions are put forward.