Transneft Siberia has completed repairs of pipes and onsite facilities during scheduled shutdowns of oil trunk pipelines (OTP) (Tyumen Region, Khanty-Mansi Autonomous Area - Yugra). The work was carried out within the scope of the comprehensive technical upgrading programme implemented by the Company.
Midlife repairs of six gate valves at the Surgut – Polotsk OTP and five gate valves at the Shaim – Tyumen OTP were conducted. During the scheduled shutdown of the Surgut – Polotsk OTP, a set of works was carried out at onsite facilities. Gate valve no.27 was replaced at Karkateyevy-3 oil pumping station (PS), and repair assemblies were cut out of a pressure oil pipeline. Two gate valves and a check valve were removed and newly installed, defects were cut out of the bypass line of the pressure control chamber at Konda-1 PS. Two dead-end sections were cut out of process pipelines, midlife repairs of two gate valves were performed at Sosva-1 PS’s main pump unit (MPU), and yet another gate valve was replaced at Sosva-2 PS.
During the Kholmogory – Klin OTP’s shutdown, pressure regulators were replaced at Satarino PS. Reinstallation of a second group safety valves assembly was carried out at Kholmogory oil pumping station.
Line maintenance crews of oil pumping stations, central maintenance divisions of the Company’s business units and the Specialised Directorate for Emergency Prevention and Response were involved. The purpose of the work was to achieve higher operational reliability and environmental safety of oil trunk pipelines’ facilities.
Pumping of oil via the oil trunk pipelines has been resumed as scheduled, the pipelines are now functioning under normal conditions.