Dry hot rock, as a clean, environment-friendly and recyclable renewable energy, will be the most environmentfriendly clean energy in the future. Dry heat rock engineering projects in the United States, Britain, Japan, France, Australia and China are introduced. According to the characteristics of dry-hot rock mass, technical problems existing in dry-hot rock drilling and completion engineering are analyzed, including low drilling efficiency, high formation temperature, poor wellbore stability, and serious leakage. In view of the aforementioned technical problems, the future developments of key technologies such as efficient rock breaking tools, drilling fluid technology, high temperature cementing technology, pressure control drilling technology, expansion casing technology, directional well technology and liquid nitrogen drilling in dry and hot rock are prospected and analyzed.

dry hot rock  /  drilling and completion  /  drilling engineering technology