MUD LIFT PUMP FOR DUAL DRILL STRING
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United States of America Patent
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Issued Date -
Jan 29, 2015
app pub date -
Jul 29, 2013
filing date -
Jul 29, 2013
priority date (Note) -
Abandoned
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Abstract
A mud lift pump for a dual drill string includes an energy input and an energy output in fluid communication with a fluid return flow passage in the dual drill string.
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