Review of Current Status of Oil and Gas Pipeline Pigging Technology and Specification Application in China and Abroad

Aiming at the pigging operation of oil and gas pipelines during the operation period, the types, characteristics, applicable operation scenarios of pigs in China and abroad, and the construction of relevant standards and specifications for pigging were introduced in detail. The current status of pigging operations for oil and gas gathering and transportation pipelines in major domestic oil and gas fields and the practices in the process of pigging operations were analysed. The difficulties faced and the reasons for the jamming problem in the pigging process were studied deeply. The work specification needs to be improved and refined for the domestic pigging, which was further suggested from the risk analysis before pigging, the selection of pigs and pigging parameters, and the formulation of safety guarantee measures. On this basis, focusing on the actual needs of on-site pigging operations, drawing on the advanced experience of foreign pigging specifications and domestic and foreign pigging cases, the construction direction of future pigging technical specifications was put forward, in order to provide better guidance for domestic oil and gas fields on-site pigging operations.