Pipe joints or couplings – With casing – lining or protector
Patent
1985-05-10
1986-09-23
Callaghan, Thomas F.
Pipe joints or couplings
With casing, lining or protector
138147, 166243, F16L 5500
Patent
active
046131655
ABSTRACT:
There is provided a protective joint for production tubing having a body portion and an increased diameter portion within a zone to be protected and including a transition ring formation and a plurality of first and second generally cylindrical annular protective rings coaxially locatable with the body portion and the increased diameter portion, respectively. The transition ring formation is located between the first and second protective rings and may include a transition ring, a supporting ring and a compensating ring which are sealingly biased with the protective rings against two retainers by a biasing means to thereby form a protective shield capable of accommodating longitudinal movement of the production tubing relative to the protective joint as well as flexing in the production string.
REFERENCES:
patent: 320683 (1885-06-01), Phillis
patent: 1880269 (1932-10-01), Murray
patent: 2925097 (1960-02-01), Duesterberg
patent: 3382930 (1968-05-01), Ribb et al.
patent: 4028796 (1977-06-01), Bergstrom
patent: 4141386 (1979-02-01), Bergstrom
patent: 4211440 (1980-07-01), Bergstrom
patent: 4349050 (1982-09-01), Bergstrom et al.
Callaghan Thomas F.
Carbide Blast Joints, Inc.
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