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Gao Lianxin
Jin Ye
School of Mechanical Engineering,
Shanghai Jiaotong University,
Shanghai 200030, China
Zhang Yi
Steel Tube Branch Co,
Shanghai Baosteel Group Corporation,
Shanghai 201900,China
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STRENGTH DESIGN OF PREMIUM THREADED CASING CONNECTION
Abstract:
Using premium casing connections instead of API ones is one of the most effective technique to prevent casing failure. The factors contribute to the strength of premium casing connections are studied with FEA and full-scale test. The criterions are presented that ensure the connection’s strength higher than the pipe. At the same time, the method is given to decrease the peak stress of the connection so as to improve its anticorruption property. At last, full-scale tests are done to test the strength of the connections designed with the method described, the results show that the connection’s strength is higher than the pipe. This indicated that the method described is effective in designing premium casing connection.
Key words: Casing connection Premium thread Connecting
strength Finite element method Full-scale test
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