(MASTERING AND PILOT TESTING OF RUSSIAN-MADE CLAD TUBULARS)
Reservoir fluid of many fields being developed by PJSC Gazprom (Orenburg, Astrakhan fields, etc.) includes corrosive components such as hydrogen sulphide, carbon dioxide, etc. These lead to corrosion of pipelines, increase the risk of pipeline failure, and raise the cost of corrosion protection, in-line inspection, and repair.
Until recently, carbon dioxide corrosion has been underestimated. However, experts now have insights into the risks involved in this process. The main danger of carbon dioxide corrosion is that it has a localized character of damage, i. e. one cannot foresee and pinpoint the place and time of formation and development of corrosion foci. The article reviews an effective method of corrosion protection which involves the use of clad tubulars with a corrosion-resistant layer.
At present, there is no experience in using clad pipes at PJSC Gazprom facilities. The world market for such goods is represented only by imported products. In this regard, PJSC Gazprom has initiated manufacturing of clad pipes, and Russian plants have mastered such production and manufactured the first prototypes under the import substitution program. The Company’s welders, in their turn, mastered the welding technologies and modes.
A pilot site was arranged at Orenburg oil, gas and condensate field (Orenburg Oblast) aiming to study operational reliability and durability of the linear pipelines made of Russian-made clad pipes under real conditions in corrosive environments. A program of pilot tests, design documentation, process regulations for pilot operation, and a program of regular instrumental (non-destructive) inspection were developed for construction and operation of this site.
The results of tests and inspection of the pilot section, as well as further laboratory tests of the pipes’, bends’, and welded joints’ steel will be used for developing conditions and recommendations for the use of Russian-made clad tubulars for construction of the PJSC Gazprom field pipelines.
V.A. Seredenok, PJSC Gazprom (Saint Petersburg, Russia), V.Seredenok@adm.gazprom.ru
V.N. Yushmanov, PJSC Gazprom, V.Yushmanov@adm.gazprom.ru
P.N. Larev, Gazprom dobycha Orenburg LLC (Orenburg, Russia), P.Laryov@gdo.gazprom.ru
A.I. Ovcharenko, Gazprom dobycha Orenburg LLC, A.Ovcharenko@gdo.gazprom.ru
A.I. Malakhov, Gazprom dobycha Orenburg LLC, A.I.Malahov@gdo.gazprom.ru
A.V. Kuznetsov, Gazprom dobycha Orenburg LLC, A.Kuznetsov@gdo.gazprom.ru
Markin AN, Nizamov RE. CO2-Corrosion of Oilfield Equipment. Moscow: All-Russian Institute for Organization, Management and Economics of Oil and Gas; 2003. (In Russian)
Lukanina TL, Mihajlova IS, Radin MA. Chemical Resistance of Materials and Corrosion Protection. Saint Petersburg: Saint Petersburg State Technological University of Plant Polymers; 2014. (In Russian)
Nedzvetskiy MYu, Arabey AB, Yegorov VA. New prospective types of tubulars made of high-strength (K8, Kh100) clad and cryogenic steels. Gas Industry [Gazovaya promyshlennost’]. 2021; 823(S3): 40–45. (In Russian)
USSR State Committee for Product Quality Management and Standards. GOST 12.2.003–91 (state standard). Occupational safety standards system. Industrial equipment. General safety requirements. Available from: https://docs.cntd.ru/document/901702428 [Accessed: 5 May 2023]. (In Russian)
USSR State Committee of Standards (Gosstandart). GOST 16037–80. Welded joints in steel pipelines. Main types, design elements and dimensions. Available from: https://docs.cntd.ru/document/1200001918 [Accessed: 5 May 2023]. (In Russian)
Deputy Minister of Fuel and Energy of the Russian Federation. RD 34.10.130–96 (regulatory guide). Guide for visual and measuring control. Available from: https://docs.cntd.ru/document/1200004710 [Accessed: 5 May 2023]. (In Russian)
Federal Agency on Technical Regulation and Metrology. GOST R 55724–2013. Non-destructive testing. Welded joints. Ultrasonic methods. Available from: https://docs.cntd.ru/document/1200107569 [Accessed: 5 May 2023]. (In Russian)
Gosstandart. GOST 17410–78. Non-destructive testing. Metal seamless cylindrical pipes and tubes. Ultrasonic methods of defect detection. Available from: https://docs.cntd.ru/document/1200003588 [Accessed: 5 May 2023]. (In Russian)