DRILL STEM AND METHOD
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United States of America Patent
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Issued Date -
Dec 11, 2008
app pub date -
Jun 6, 2008
filing date -
Jun 8, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A drill stem segment and method of manufacture are shown. Drill stem segment and methods are shown that greatly strengthen the weld joint using sleeves. reinforced butt joints are shown in selected examples where sleeves and drill stem tubes are welded to connections such as tapered thread connections. Using methods described, the drill stem segments are also inexpensive to manufacture.
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