Tubular connection

Details Tubular connection Tubular connection

1982-09-20

1985-04-02

Scanlan, Jr., Richard J.

Pipe joints or couplings

Particular interface

Tapered

285390, F16L 2500

Patent

active

045083754

ABSTRACT:
The present invention relates to tubular connections for application to heavy wall, high performance casing in high pressure, critical service oil and gas wells. A threaded and coupled tubular connection is provided which comprises a male member and a female member having engageable threads disposed on respective first and second substantially matching tapers of about 1.750 inches per foot on the diameter. This taper provides increased female member wall thickness at the narrow end of the female taper; increases the perfect thread length; provides deeper stabbing of the male member into the female member; reduces leakage path clearances; and reduces the male member-in-female member position tolerance. The taper tolerances of the male and female thread tapers are staggered to provide a lower taper on the male member and a higher taper on the female member which results in an advantageous taper mismatch insuring sealing and interference within the made-up connection adjacent the narrow end of the male member.

REFERENCES:
patent: 2062407 (1936-12-01), Eaton
patent: 2204754 (1940-06-01), Frame
patent: 2885225 (1959-05-01), Rollins
patent: 3224799 (1965-12-01), Blose et al.
patent: 3307860 (1967-03-01), Blount et al.
patent: 3346278 (1967-10-01), Yocum
patent: 3355192 (1967-11-01), Kloesel, Jr. et al.
patent: 3427707 (1969-02-01), Nowosadko
patent: 3572777 (1971-03-01), Blose
API Standard 5B.

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