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Barry Mccallum
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Dundee, GB
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last 30 patents
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Patent Grant
Multi-stage downhole hydraulic stimulation assembly
Patent number
9,920,600
Issue date
Mar 20, 2018
Schlumberger Technology Corporation
Barry McCallum
E21 - EARTH DRILLING MINING
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last 30 patents
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Patent Application
Multi-Stage Downhole Hydraulic Stimulation Assembly
Publication number
20120312536
Publication date
Dec 13, 2012
Barry Mccallum
E21 - EARTH DRILLING MINING