Coupling for drilling-with-casing operations
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United States of America Patent
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Dec 13, 2011
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N/A
app pub date -
Jan 28, 2008
filing date -
Apr 30, 2004
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Abstract
A threaded casing connection for use in drilling-with-casing operations includes an integral, sacrificial wear sleeve on the downhole end of the coupling which has additional wear protection on portions of its outer wall and leading face.
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