Buttress-threaded tubular connection
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United States of America Patent
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-
Oct 25, 1994
Grant Date -
N/A
app pub date -
Mar 13, 1992
filing date -
Mar 13, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention pertains to an improvement in buttress-threaded tubular connections. In particular, the connection is improved by controlling the tubular member thread pitch diameter tolerance to .+-.0.0015 inch, to provide a thread bearing contact pressure which is relatively constant over the entire length of the connection. In addition, the improved connection provides a reduction in hoop stress of about 20% over known buttress-threaded tubing connections. The present invention typically includes the use of variable make-up in combination with the control of the tubular member thread pitch diameter tolerance.
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