Subsea oil and gas pipeline detecting and locating apparatus and process

The present invention discloses subsea oil and gas pipeline detecting and locating apparatus and process. The subsea oil and gas pipeline detecting and locating apparatus consists of an electrically driven creeping device, a creeping device controller, a high energy power source, an intelligent controller, a real-time locater, an ultrasonic acquiring processor, and an ultrasonic eddy flow detector connected through shaft couplings. The operation process includes the following steps: hose sweeping the pipeline and throwing the apparatus into the pipeline, moving the apparatus with the electrically driven creeping device under the control of the intelligent controller, detecting and locating the fault to be repaired, etc.