| 摘要 |
A threaded pipe connection having box and pin members is provided with inner engageable thread means on the box and pin members, the thread means including a helical dove-tail thread having negative flank angles extending along the lengths of the box and pin members, and a helical intermediate thread having positive flank angles extending along the lengths of the box and pin members adjacent the dove-tail thread. Upon makeup, the intermediate threads generate hoop tension in the box member and hoop compression in the pin member, and the dove-tail threads generate hoop compression in the box member and hoop tension in the pin member.
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