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Rolf Ludolf
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Sugar Land, TX, US
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last 30 patents
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Patent Grant
Apparatus and method for inserting and retrieving a tool string thr...
Patent number
6,719,061
Issue date
Apr 13, 2004
Schlumberger Technology Corporation
Laurent E. Muller
E21 - EARTH DRILLING MINING
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last 30 patents
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Patent Application
Apparatus and method for inserting and retrieving a tool string thr...
Publication number
20020185276
Publication date
Dec 12, 2002
Laurent E. Muller
E21 - EARTH DRILLING MINING