Petroleum exploration operations are often carried out in harsh environments, from hot deserts to cold polar regions, and the requirements for the reliability and accuracy of temperature sensors are extremely high. Dry-block calibrators play an indispensable role in the calibration of temperature sensors in petroleum exploration. During petroleum exploration, temperature sensors are used to monitor downhole temperature, formation temperature and the operating temperature of drilling equipment. Dry-block calibrators can simulate the temperature conditions in these extreme environments and accurately calibrate temperature sensors to ensure that they can accurately measure temperature under different geological conditions and ambient temperatures. Accurate temperature data is of great significance for formation analysis, reservoir evaluation and drilling safety assurance in petroleum exploration. For example, through accurate downhole temperature measurement, the thermal characteristics of the formation can be understood and the distribution of oil and gas resources can be judged; accurate monitoring of the temperature of drilling equipment helps to detect potential equipment failures in time, avoid equipment damage due to excessive temperature and ensure the smooth progress of petroleum exploration operations.