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United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Mar 9, 2000
filing date -
Mar 9, 2000
priority date (Note) -
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Abstract
An improved thin walled threaded spacer for use in preventing thread galling in adjacent sections of drill pipe in a drill string is formed by mechanically deforming a strip of copper/beryllium alloy containing 2% beryllium to form a preform having a hollow, truncated conical section and then mechanically deforming the conical section to impart helical grooves therein.
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