Metal deposition of exterior members in oil field tubulars
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United States of America Patent
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Mar 22, 2016
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N/A
app pub date -
Nov 7, 2012
filing date -
Nov 7, 2012
priority date (Note) -
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Abstract
Layered metal deposition by fusion thereof onto a surface of an engineered structural member, without degrading structural performance. The net shape of an exterior member is defined, including a fusion contact area. The structural member is preheated below its maximum operating temperature. An energy beam and feedstock are directed to a feed point in the fusion area, thereby forming a molten puddle fusing the materials together. The feed point is moved relative to the structural member, thereby advancing the molten puddle of presently fed feedstock and rapidly solidifying previously fed feedstock. The energy beam power is modulated to control the size of the molten puddle so as not to exceed a predetermined depth of penetration of the fusion region into the structural member. Advancing the feed point sequentially fuses feedstock into the defined net shape on the structural member.
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