Research on detection system of drill pipe based on MMMT

When drill pipe works,it always suffers from different kinds of forces and large loads,and these complex loads will lead to different levels of stress concentration in the drill pipes.Thus micro- cracks or other defects in drill pipe are easily appeared.Fractures,leakage and other issues that will seriously affect the normal work of drilling may occur.Therefore,a drill pipe detection system based on MMMT(Metal magnetic memory testing) and software development platforms of Visual Basic and Matlab was developed to test whether the stress concentration in the drill pipes was under the safety standard to use.The detector can be easily moved and be stable to detect the drill pipe body.The software can be used for controlling the data collection,analysing the data and judging whether the drill pipe is safe to use or not,and finally output the detection report of drill pipe and so on.The drill detector and the detection software were applied to test the dill pipes that had been used,the test results showed that combining with the drill pipe detection system,it can be easily and efficiently to detect stress concentration in the drill pipes.Also,it can generalize the use of MMMT,one advanced technology,in drill pipe detection.