Threaded connection

Details Threaded connection Threaded connection

1983-07-05

1985-06-04

Scanlan, Jr., Richard J.

Pipe joints or couplings

Particular interface

Tapered

285355, 285391, F16L 2500

Patent

active

045210420

ABSTRACT:
A pipe joint and threaded pin and box members adapted for use therein are disclosed in which two-stepped thread surfaces are axially separated by dissimilar angled positive angle torque and sealing surfaces and internal and external sealing surfaces are provided on both ends of the threaded surfaces. Protective non-engaging shoulders are provided adjacent the external sealing surfaces. Cooperating end shoulders are provided on the end of the pin member and the interior end of the counterbore of the box member. Preferably the end shoulders are provided approximately perpendicularly to the internal sealing surfaces, the box end shoulder acting to trap the pin end shoulder under conditions of high joint interior pressure.

REFERENCES:
patent: 3489437 (1970-01-01), Duret
patent: 4161332 (1979-07-01), Blose
patent: 4192533 (1980-03-01), Blose
Hydril Bulletin 2654.

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