The high-temperature and high-pressure casing patching and repairing tool comprises a lifting connector, the inner side face of the lifting connector is connected with a pressure transmitting
pipe through a
screw thread, the outer side face of the lifting connector is connected with a hanger through a
screw thread, and the hanger is connected with a
hydraulic cylinder hook in a hooked mode through a
piston connecting rod hook; a shock absorption lifting short section penetrates through the
pressure transmission pipe and the hanger, one end of the
hydraulic cylinder hook is connected with a first-stage
hydraulic cylinder in a screwed mode, one end of the first-stage hydraulic cylinder is connected with a second-stage hydraulic cylinder, a first-stage
piston connecting rod penetrates through the first-stage hydraulic cylinder, one end of the first-stage
piston connecting rod is connected with the shock absorption lifting short section in a screwed mode, and the other end of the first-stage piston connecting rod is connected with the second-stage hydraulic cylinder in a screwed mode. The high-temperature and high-pressure casing patching and repairing tool can work in a high-temperature and high-pressure environment under a deep well, meanwhile, the
pressure resistance is high, colloidal
cement can be injected into the high-temperature and high-pressure casing patching and repairing tool for well cementation, and the deep well repairing capacity is greatly improved.