Non-well-killing oil extraction pipe column for CO2 flooding well

The utility model discloses a CO2 flooding well snubbing oil extraction pipe column which comprises a polish rod blowout preventer, a sucker rod is arranged on the lower portion of the polish rod blowout preventer, the polish rod blowout preventer is arranged outside an oil extraction well mouth, the sucker rod is arranged inside an oil pipe, a piston is arranged at the tail end of the sucker rod, and the piston is connected with the sucker rod. An oil well pump is arranged on the lower portion of the piston, and well control safety management in oil extraction and operation is achieved through the snubbing oil extraction process pipe column. During oil extraction, the oil sleeve is not communicated, the casing pipe produces without pressure, and well control safety is guaranteed; during operation, a channel between a stratum shaft and the ground can be effectively blocked by lifting out the oil extraction pipe column, so that CO2 gas cannot flow upwards, and well killing operation is avoided. The method has