Testing device

The invention discloses a testing device, belongs to the technical field of petroleum equipment, and aims to solve the technical problem that the current oil and gas well injection-production alternating influences the complicated testing process, the testing device is used for testing an oil and gas pipeline, the oil and gas pipeline comprises a stratum casing, an intermediate casing and an oil and gas pipe, the stratum casing sleeves the intermediate casing, and the oil and gas pipe sleeves the intermediate casing. The oil-gas pipe is sleeved with the intermediate casing, a first gap is formed between the stratum casing and the intermediate casing, a geological layer is arranged in the first gap, and the oil pipe is provided with a gas inlet end and a gas outlet end; the testing device comprises a gas injection part and a temperature control part, the gas injection part is communicated with the gas inlet end, the pressure of gas injected into the oil gas pipe by the gas injection part is adjustable, and the