Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1977-10-06
1979-01-09
Keenan, Michael J.
Metal working
Method of mechanical manufacture
Assembling or joining
138 33, 166 775, 219 1057, 219535, 285 41, F16L 5300
Patent
active
041330951
ABSTRACT:
Treatment of a steel well pipe connection involves use of an electrical coil and a cylindrical sleeve carrying the coil, and includes the steps:
REFERENCES:
patent: 1817808 (1931-08-01), Eaton
patent: 2341670 (1944-02-01), Stinson
patent: 2535320 (1950-12-01), Richardson
patent: 2992017 (1961-07-01), Dritz
patent: 3007022 (1961-10-01), Jackson et al.
patent: 3063143 (1962-11-01), Bodine
patent: 3560709 (1971-02-01), Crane
patent: 3822902 (1974-07-01), Maurer et al.
Bollfrass Charles A.
Lewis George E.
Haefliger William W.
Hydril Company
Keenan Michael J.
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