Improvement of tail pipe devices for electric submersible pumps in the Tahe Oil Field

Tail pipe devices improve the working conditions and prolong the operating life of electric submersible pumps (ESP) in the Tahe Oil Field. However, accidents might happen when small and flat cables cross the devices, which is harmful to pumps. We found some causes through pump inspections, including cable material, compaction force, seal structure, and oil well conditions. Different small and flat cables are tested under different temperatures and seal structures. We observed their performances under same compaction force and different seal conditions, and concluded some causes for the accidents. The hanging device for tail pipes and the selection for small and flat cables were improved. The hanging device with 12 sealing rings was recommended.