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Ashley B. Johnson
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Sugar Land, TX, US
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Patents Grants
last 30 patents
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Patent Grant
Reservoir communication with a wellbore
Patent number
6,598,682
Issue date
Jul 29, 2003
Schlumberger Technology Corp.
Ashley B. Johnson
E21 - EARTH DRILLING MINING
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Patent Grant
Nozzle arrangement for well cleaning apparatus
Patent number
6,397,864
Issue date
Jun 4, 2002
Schlumberger Technology Corporation
Ashley B. Johnson
E21 - EARTH DRILLING MINING
Information
Patent Grant
Abrasives for well cleaning
Patent number
6,032,741
Issue date
Mar 7, 2000
Schlumberger Technology Corporation
Ashley Bernard Johnson
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
Reservoir communication with a wellbore
Publication number
20020020535
Publication date
Feb 21, 2002
Ashley B. Johnson
E21 - EARTH DRILLING MINING