The project“The Deep Geothermal Resources Survey in Wendeng Rongcheng Weihai Area of Shandong Province” is one of the 38 provincial-level geological exploration projects of Shandong Province for 2018， and its overall goal is to provide channels and specific physical data for geothermal geological survey， borehole temperature measurement， core thermophysical properties and radioactive element content testing by drilling a 3000 m temperature measurement borehole with wireline core drilling technology. In reference to the 3000 m-deep small diameter geothermal drilling project， this paper systematically introduces the drilling structure， Drilling equipment， and key drilling technology. with focus on the experimental comparison and analysis of mud technology and deep hole drill bit technology for severe fractured zones， and high stress and complex formation conditions. The relevant technical measures were adopted to solve the down hole complex problems and the long service life and high efficient bits were developed to improve the drilling efficiency and reduce the cost. The paper also discusses the management method of "site standardization and green construction" for deep hole geothermal drilling.