Threaded joint for oil well pipes
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United States of America Patent
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May 30, 1995
Grant Date -
N/A
app pub date -
Apr 23, 1994
filing date -
Sep 23, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A threaded joint for oil well pipes has excellent leak-tightness and a high disconnect torque and can withstand repeated make-ups. At the time of make-up, the load flanks (1) of the male and female threads contact each other, either the crest surfaces (3) or the root surfaces (4) are contacting and the other of the two pairs of surfaces has a gap, and a gap of at most 0.03 mm exists between the stab flanks (2) of the male and female threads.
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