Drill pipe manufacture
A tool joint is friction welded to one end of a tube. The weld area cools in air as the pipe moves to a tempering station.
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Main Author | |
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Format | Patent |
Language | English |
Published |
24.04.1979
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Subjects | |
Online Access | Get full text |
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Summary: | A tool joint is friction welded to one end of a tube. The weld area cools in air as the pipe moves to a tempering station. |
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Bibliography: | Application Number: US19770851037 |