Z-shaped thread form for tubular connections
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United States of America Patent
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Sep 15, 2009
Grant Date -
Mar 27, 2008
app pub date -
Sep 26, 2006
filing date -
Sep 26, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A thread form is shown which is used to make a threaded pipe connection capable of being screwed together and subsequently unscrewed. A pin is provided having external threads with stab flanks and load flanks and flat crests and roots for mating with the mating internal threads of a box to make up a pipe connection. The stab flanks and load flanks form complex geometric profiles which in one version form an inclined Z-shape in profile and in another version form a reverse inclined Z-shape profile. Each profile includes at least three separate facets with the facets on the stab flank and the facets on the load flank both leaning in the same direction with respect to the longitudinal axis of the pipe, when viewed in profile.
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Cited Art Landscape
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