FOOT VALVE ASSEMBLY FOR A DOWN HOLE DRILL
PLUNKETT, TIMOTHY J, YAO, JING JAMES, WOLFER, DALE R, CAMPBELL, PAUL, DELL II, WILLIAM H
Year of Publication 15.12.2011
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Year of Publication 15.12.2011
Patent
FOOT VALVE ASSEMBLY FOR A DOWN HOLE DRILL
DELL, II WILLIAM H, PLUNKETT TIMOTHY J, YAO JING JAMES, CAMPBELL PAUL, WOLFER DALE R
Year of Publication 29.09.2011
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Year of Publication 29.09.2011
Patent
FOOT VALVE ASSEMBLY FOR A DOWN HOLE DRILL
PLUNKETT, TIMOTHY J, YAO, JING JAMES, WOLFER, DALE R, CAMPBELL, PAUL, DELL II, WILLIAM H
Year of Publication 29.09.2011
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Year of Publication 29.09.2011
Patent
Bottenventilsaggregat för en sänkborr
TIMOTHY J PLUNKETT, PAUL CAMPBELL, JING JAMES YAO, WILLIAM H DELL II, DALE R WOLFER
Year of Publication 10.09.2012
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Year of Publication 10.09.2012
Patent