Development of Premium Threaded Connections for Casing and Tubing

Abstract:

The application of API threaded connections for casing and tubing is limited due to their imperfect sealing ability and weak connecting strength. To overcome these prominent drawbacks of API threaded connections, new WSP series of premium threaded connections are developed by Wuxi Seamless Oil Pipe Corporation for HTHP(High temperature, High pressure) wells, deep wells, steam injection wells, highly deviated and long horizontal wells, etc. Characteristics and application ranges of eight kinds of these high performance premium threaded connections are compared and analyzed thoroughly in this paper. The comparison results are not only a good reference for technicians to design new connections, but a technical proof for users to choose the proper connections in different applications.

• Periodical: Advanced Materials Research (Volume 744)
• Pages: 53-57
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.744.53
• Online since: August 2013
• Authors: Lian Xin Gao, Kun Zhong Sun, Yi Zhang
• Keywords: Casing, Premium Threaded Connection, Structural Design, Tubing, WSP Series

References

[1] API Specification 5B: Specification for Threading, Gauging and Thread Inspection of Casing, Tubing, and Line Pipe Threads, 5th Edition, (2008).

[2] GAO Lian-xin SHI Jiao-qi: Recent situation and future of premium tubing/casing connections. Oil field equipment, 2008, 37(2): 15-19.

[3] Mallenhalli, Nandakumar K. Method determines leak resistance of 8-round thread. Oil and gas journal, 1992, 90(3): 51-53.

[4] Guangjie, Yuan, Zhengqiang Yao, etc. Numerical and experimental distribution of temperature and stress fields in API round threaded connection. Engineering failure analysis, 2006, 13(8): 1275-1284.

DOI: 10.1016/j.engfailanal.2005.11.006

[5] M. Sugino: Development of an innovative high-performance premium threaded connection for OCTG. OTC paper 20734, Houston, May (2010).

DOI: 10.4043/20734-ms