Cutlery
Patent
1976-10-01
1977-11-29
Blix, Trygve M.
Cutlery
291495R, 29433, 175325, 308239, F16C 2900
Patent
active
040602869
ABSTRACT:
A wear-resistant drill pipe collar and method of making same are provided wherein such collar has at least one annular groove defined therein and such groove has cooperating surfaces which hold a plurality of easily installed and removed wear-resistant inserts which protect the collar and its associated pipe structure against excessive wear during rotation and axial movement thereof in an abrasive environment.
REFERENCES:
patent: 1814183 (1931-07-01), Patterson
patent: 2099661 (1937-11-01), Sharp
patent: 2197778 (1940-04-01), Cowan
patent: 2288124 (1942-06-01), Creighton
patent: 2696413 (1954-12-01), Wheildon
patent: 3074767 (1963-01-01), Rosenberg
patent: 3480094 (1969-11-01), Morris
patent: 3697141 (1972-10-01), Garrett
patent: 3784238 (1974-01-01), Chance et al.
patent: 3993368 (1926-11-01), Jurgens et al.
Blix Trygve M.
Kazenske Edward R.
Reynolds Metals Company
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