Inventor
DOERING FALK W
US5 patents
Patents
5 patentsUS7334642B2Feb 26, 2008
Constant force actuator
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US7143843B2Dec 5, 2006
Traction control for downhole tractor
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US7222682B2May 29, 2007
Chain drive system
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US7185714B2Mar 6, 2007
Traction control for downhole tractor
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US7156192B2Jan 2, 2007
Open hole tractor with tracks
SCHLUMBERGER TECHNOLOGY CORP37 citations89