Ultra high torque double shoulder tool joint

Details Ultra high torque double shoulder tool joint Ultra high torque double shoulder tool joint

1997-05-02

1999-06-01

Brittain, James R.

Pipe joints or couplings

Particular interface

Tapered

285355, 285390, F16L 2500

Patent

active

059082127

ABSTRACT:
An ultra high torque double shoulder tool joint (see FIG. 1) for maximizing the torsional strength of a threaded connection by correlating a transverse cross-sectional counter-bore area of the box (12) and pin (10). The pin 10 includes a base section 74 and a nose section 24. The nose section 24 defines a cross-sectional nose area 28. The pin external threads 22 include a taper no greater than 1/12. The box 12 includes a cross-sectional counterbore area 46 and a cross-sectional box area 52. The overall strength of the tool joint is dependent upon the torsional strength of the threaded connection, the cross-sectional nose area (28) and the cross-sectional counter-bore area (46).

REFERENCES:
patent: 2532632 (1950-12-01), MacArthur
patent: 3079181 (1963-02-01), Van Der Wissel
patent: 4521042 (1985-06-01), Blackburn et al.
patent: 4548431 (1985-10-01), Hall et al.
patent: 4549754 (1985-10-01), Sanders et al.
patent: 5358289 (1994-10-01), Banker et al.
patent: 5492375 (1996-02-01), Smith
patent: 5505502 (1996-04-01), Smith et al.

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