Monitoring method for abrasive jet cutting depth of casing pipes

With the continuous exploitation of offshore oil and gas, the demand for replacement of damaged casing and recovery of abandoned casing is growing. Based on this demand, a monitoring method for abrasive jet cutting depth of casing pipe is proposed. According to the principle of abrasive jet cutting, the vibration signal produced by abrasive impacting casing is picked up by vibration sensor, and the data acquisition and output of vibration signal are carried out by NI-USB 6361. The upper computer operation display interface of the system is established by Labview, and the cutting state visualization interface is added. The experimental results show that the system can accurately judge the current cutting state and display it in real time at the main interface, which can realize the real-time monitoring of the cutting state of the abrasive jet casing and improve the efficiency of casing recovery in offshore abandoned oil wells.