Tubular connection with cylindrical and tapered stepped threads
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United States of America Patent
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-
Aug 27, 1985
Grant Date -
N/A
app pub date -
Apr 26, 1983
filing date -
Apr 26, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tubular joint or connector of box and pin members is disclosed having first threads provided on a taper with respect to the axis of the joint and second threads which are cylindrical and axially separated from the first threads. The first and second threads are radially separated by a step region. Two metal-to-metal seals of complementary engaging sealing surfaces are provided, one adjacent the end of the pin member, the other axially disposed between the two threads. Reverse angle torque shoulders at the end of the pin member and the interior termination of the box member and hooked threads further characterize the joint and box and pin members.
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