Flush joint high torque thread
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United States of America Patent
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Nov 8, 2022
Grant Date -
May 20, 2021
app pub date -
Sep 14, 2020
filing date -
Nov 18, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A flush joint high torque thread that achieves superior tensile efficiency and compression efficiency. In one example, the thread of a pin member and a box member includes a thread a chamfer with angled shoulders on each side of the thread to achieve increased torque. The stab flanks each contain a lead-in chamfer extending no further than a thread pitch line. The load flanks are each tapered. The stab flanks engage each other during assembly, but not upon assembly. The load flanks do not engage each other during assembly, and do engage each other upon assembly. The pipe achieves both a 70% tensile efficiency and a 90% compression efficiency.
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