In order to solve the problem of criteria and basis lack for 5000 m geological core drilling and improve the automation and intelligence level of drilling equipment, the research of 5000 m intelligent geological drilling technology and equipment has been started. A number of innovative achievements have been achieved through the development and test of drilling equipment, drilling tools and drilling technology. Through the optimization research of ultra- deep hole drilling diameter and pipe string specification, drill pipe specification design and equipment performance parameter selection, 5000 m geological core drilling technical specification system has been formed. Based on the development of key equipment such as 5000 m deep hole geological core drilling rig and wellhead automatic operation device, the whole process automation of wellhead operation of wire- line core drilling is realized, and the compliance control technology of pipe string with lightweight drilling rig is formed. Based on the study of technical problems such as discrimination of working conditions in the hole, optimization of drilling parameters and trajectory optimization control in complex formation, an intelligent control technology for the integrated drilling process from surface to hole bottom based on multi- source information fusion is formed. Based on the development of high- performance thin- walled wire- line core drill pipe and a series of high- efficiency drill tools with small- diameter, a series of drill pipe and drill tools technology for deep wire- line coring has been formed. The research and development of environment- friendly flushing fluid with high temperature resistance, biological gel breaking waste slurry treatment technology and "broad- spectrum" double slurry plugging technology have been carried out, with which a green and environment- friendly flushing fluid system and wall protection plugging technology are formed.