Abstract: In the exploration construction process of Liujiaoyao Coalfield,due to the existing geological factors of deep glutenite strata,complex strata,fault development and intrusion of lamprophyre,which increased the difficulty of drilling construction in the orefield.In order to solve the problems,by repeated practice and constant study,the high-quality and efficient low solid mud and casing pipe wall protection technique are adopted to improve the drilling efficiency,reduce drilling cost,the practice effects is significant,which provide some reliable reference for the drilling construction work in the orefield and its surrounding area.

Key words: Coalfield exploration, Deep glutenite strata, Low soild mud, Casing pipe wall protection technique