Metal cleaning and deposition process for coiled tubing using electro plasma
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United States of America Patent
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Jan 26, 2016
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N/A
app pub date -
Aug 9, 2014
filing date -
Aug 9, 2013
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Abstract
A method for creating an improved coiled tubing is provided, comprising cleaning a sheet metal workpiece using an electroplasma process to remove oxide scale and other contaminants on surfaces of the workpiece; applying a first metal coating to the workpiece using the electroplasma process; forming the sheet metal workpiece into a tube having abutting edges to form a seam; welding the seam to complete the formation of the tube; grinding the seam to establish a smooth exterior surface on the seam; applying a second metal coating to the seam of the tube using the electroplasma process; and coiling the tube around a spool.
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