Deformation leads to reduced load carrying and transportation capacity, an essential cause of oil and gas pipeline failure. Lightweight cleaning pigs cannot locate and inspect pipeline deformation. Heavy and bulky inspection pigs have a serious risk of becoming stuck when passing through pipeline deformation areas. Aiming at the actual demand for strong passability deformation inspection of pipelines under complex working conditions, a non-contact deformation inspection and positioning pig is designed and developed based on electromagnetic ranging theory and the advantages of polyurethane foam. A non-contact inspection probe and a strong passability inspection (SPI) pig are created and a sensing system test platform, a pull platform and a water drive platform are set up to conduct dynamic testing of the sensing system and instruments. The results show that the pipeline deformation inspection capability of the sensing system is better than 1%D (where D is the outer diameter of the pipeline), with passage capacity for 25%D shrinkage, mitre elbows and gate valves, to meet the requirements of pipeline deformation inspection and positioning with strong passage capacity. In this paper, the design, development and testing of the novel SPI pig are discussed.
Xin et al. (Wed,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: