Metal working – Method of mechanical manufacture – Shaping one-piece blank by removing material
Patent
1984-04-20
1987-06-23
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Shaping one-piece blank by removing material
29DIG18, 72340, 72368, 138172, 138177, 175320, 285333, B23P 1300
Patent
active
046741712
ABSTRACT:
A substantially homogeneous heavy wall drill pipe and its method of manufacture are disclosed. A cylindrical ingot is placed in a multi-hammer forging press to form the ingot into a drill pipe bar having a central protector portion and upper and lower connector sections each of larger diameter than cylindrical body sections of the drill pipe. Thereafter, the bar is straightened and upper and lower end connectors are machined. Threaded end portions are machined on the connectors and a bore is drilled through the drill pipe bar.
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DeCell Alonzo L.
Patarini Peter
Perkin Gregg S.
Goldberg Howard N.
Gorski Joseph M.
LOR, Inc.
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