Design and Fretting Characteristics Behavior Analysis of the Deep-sea Pipe Plug

The deep-sea pipe plug is critical equipment in emergency maintenance operations. Existing deep-sea pipeline plugs have issues such as excessively large axial dimensions and being limited to use with pipelines of a single wall thickness. To address this issue, an external anchoring - internal plugging deep-sea pipe plug is designed. Considering the tangential fretting behavior of the rubber barrel during its sealing operation, fretting wear tests are conducted to study the fretting characteristics. This research provides a theoretical basis for predicting the remaining service life of the sealing rubber barrel and concurrently enriches and advances the fretting tribology theory of sealing materials.