西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (3): 164-174.DOI: 10.11885/j.issn.1674-5086.2016.08.02.02

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Reflection on Domestic and Foreign Research Status of Subsurface Safety Valves and Their Domestication

LIU Wei1, YANG Song2, MAI Yu3, WANG Yimin4, JIANG Shikai5   

  1. 1. School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Tarim Oilfield Engineering Technology Department, PetroChina, Korla, Xinjiang 841000, China;
    3. Tarim Oilfield Development Department, PetroChina, Korla, Xinjiang 841000, China;
    4. Tarim Oilfield Research Institute of Exploration and Development, PetroChina, Korla, Xinjiang 841000, China;
    5. Sichuan Baoshi Machinery Special Vehicle Company Limited, Guanghan, Sichuan 618300, China
  • Received:2016-08-02 Online:2018-06-01 Published:2018-06-01

Abstract: Motivated by the insufficient research and development of subsurface safety valves in China, the structure and classification methods of subsurface safety valves are introduced, and oil tube recovery products from four global oil-service companies and domestic enterprises are analyzed. The comparison shows that foreign companies have characteristic structures and functions of subsurface safety valves but share similar core technologies. The products can adapt to different well depths, temperatures, and pressures; however, domestic products are only applicable for shallow wells and low-pressure environments. The latest research conditions of subsurface safety valves in both China and foreign countries are studied, and the comparative analysis shows that foreign research mainly focuses on the safe reliability and functional diversity, while domestic research only focuses on the preliminary design and either indoor or outdoor detection. Eventually, key technologies of the urgent settlement of the domestication of subsurface safety valves, as well as solutions and thoughts are proposed by considering the present technical state of subsurface safety valves in China.

Key words: subsurface safety valve, underground equipment, oil-gas well, tubing-retrievable SSVs, technical status

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