Kun2-X1 well is a key well located in the Kunteyi depression of the northern margin of the Qaidam Basin, with a total drilling depth of 7344 m, a maximum inclination of 74°, a maximum formation pressure of 115 MPa, and a bottom hole temperature of 197 °C. It is a typical ultra deep, ultra-high temperature, ultra-high pressure, and high inclination well, and its difficulty is rare in onshore oil and gas fields in China. This article focuses on the challenges faced by the Kun 2-X1 high angle ultra deep well, such as abnormal high temperature, high pressure, difficult trajectory control, and poor formation drillability. Through conducting wellbore structure, high-temperature orientation, high-temperature drilling (cementing) fluid, and experimental application of ultra-high temperature orientation technology, a preliminary drilling and completion supporting technology for Kun 2-X1 high angle ultra deep well has been formed. The research results indicate that: ① the reverse design of the wellbore structure forms a non-standard five opening structure for Kunteyi high angle wells, creating favorable wellbore conditions for subsequent implementation of casing fracturing; ② Formed a 210 ℃ high-temperature polyamine organic salt drilling fluid system and high-temperature cement slurry cementing process, ensuring drilling safety and qualified cementing quality; ③ A high-temperature directional drilling process has been formed, mainly consisting of “impregnated diamond drill bits + turbine drilling tools + 200 ℃ high-temperature MWD”, achieving good control of the entire trajectory; ④ Optimized the hydraulic parameters for hole cleaning and leakage prevention in Kun 2-X1 well, playing a key role in hole cleaning and leakage prevention in ultra deep sections. The successful drilling of Kun 2-X1 has effectively ensured the exploration and discovery of deep gas reservoirs, accumulating valuable experience for the development of similar oil and gas fields in the future.