Tubing or casing joint

Details Tubing or casing joint Tubing or casing joint

1975-09-29

1977-03-01

Callaghan, Thomas F.

Pipe joints or couplings

With fluid pressure seal

Flexible lip

2853323, 285334, F16L 1500

Patent

active

040098931

ABSTRACT:
Box and pin members have two axially spaced thread sections being separated by a radial step zone which includes, for one member e.g. the pin member, an annulus having an axial undercut, a frusto-conical end face and a radially outwardly bulging peripheral surface, which sealingly engages a slightly contoured inner surface of the box member in the step zone, while the end face of the annulus bears against a complementary face in the step zone of the box member. These stop faces supplement complementary thread stop faces respectively at the end of the pin member and in the box member. In a second example, the end face of the annulus is spaced from the box member and the flange of sealing sleeve is interposed, while the sleeve itself is situated in the undercut.

REFERENCES:
patent: 2006520 (1935-07-01), Stone et al.
patent: 2239942 (1941-04-01), Stone et al.
patent: 2746486 (1956-05-01), Gratzmuller
patent: 2992019 (1961-07-01), MacArthur
patent: 3100656 (1963-08-01), MacArthur
patent: 3145035 (1964-08-01), Hanback
patent: 3850456 (1974-11-01), Hanback et al.
patent: 3856337 (1974-12-01), Ehm et al.

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