Application case of typical river crossing pipeline buried depth and anti-corrosion layer detection based on ROV robot

River crossing pipeline is an important part of China's oil and gas pipeline network system. For river crossing pipelines, the traditional technology of location, depth and corrosion protection layer damage detection is not suitable. Based on the investigation of the current typical river crossing pipeline inspection technology and equipment at home and abroad, this paper introduces a typical river crossing pipeline inspection equipment equipped with ROV, which is independently developed, and carries out inspection application on a domestic underwater pipeline crossing the Yangtze River. The field application results show that the ROV based detection technology of river crossing pipeline buried depth, negative protection potential and anti-corrosion layer quality is feasible, and the accuracy meets the requirements of field detection, which provides technical support and guidance for the field detection of typical river crossing pipelines in China.