Abstract:Geological drilling is the most direct exploration means and a high-risk concealed project. Frequent accidents in the hole have caused great losses and even scrapped the drilling. How to prevent in advance and ensure the smooth implementation of the project is an important link of drilling construction. Taking the investigation of deep geothermal resources in Jiaodong area as an example, the treatment methods of in hole accidents encountered in the construction process have been analyzed and summarized in this paper in order to provide some references for the prevention, reduction and treatment of hole accidents in the future.