Buttress-threaded tubular connection

Details Buttress-threaded tubular connection Buttress-threaded tubular connection

1992-03-13

1994-10-25

Arola, Dave W.

Pipe joints or couplings

Particular interface

Tapered

29407, F16L 2500

Patent

active

053582896

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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patent: 4962579 (1990-10-01), Moyer et al.
patent: 5040827 (1991-08-01), DeLange

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