Tool joint
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 29, 1985
Grant Date -
N/A
app pub date -
Jun 20, 1983
filing date -
Jun 20, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tool joint in which different tapers on the threads result in an artificial change in pitch and a radial interference and an asymmetric root cut on a larger radius than conventional API threads together with the effect of the tapered thread engagement reduces maximum stress in the thread roots and prevents over-torquing.
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