Magnetic coil parameters design of oil casing damage detector based on magnetic flux leakage

The magnetic flux leakage detection method is one of the important oil casing defects detection methods. It is significant to locate the position of the defects and evaluate the degree of the damages. Based on analyzing the magnetic path of the oil casing, a design of the magnetic core parameters that guarantees the detection results can be hardly affected by the environment is presented in this paper. The magnetic flux leakage of the irregular oil casing pipe in the actual work environment is simulated by using the finite element method. The simulation results verified the method.