Tubing Coupling
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Tubing coupling is one kind of drilling toolused to tubing connection.
Application:
It is a kind of drilling tool and used to tubing connection.
Structture:
The tubing end connects with the inner wall of the coupling by taper thread, and the coupling end connects with the tubing by flat thread with same thread and pitch.
Characteristics:
It has the advantage to relieve stress concentration. Low fatigue fracture rate and good connection can prevent column beak off effectively.
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1. Type of Packer
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2. Casing size and weight & hole size
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3. Temperature & hole depth
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4. Connection size and type