Oil and gas wells are fixed assets of petroleum companies, and the production casing is the most basic element constituting an oil and gas well. Once the oil layer casing is damaged and cannot be repaired, it means the abandonment of the oil and gas well and the loss of fixed assets. The production casing is constantly subjected to the high pressure of the oil layer and the erosion of gas, liquid, and other media, and is repeatedly subjected to various well workover operation...