Lac
Alan Lac, Berkeley, CA US
Étienne Lac, Cambridge, MA US
Patent application number | Description | Published |
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20140361778 | APPARATUS AND METHODS FOR MEASURING SPONTANEOUS POTENTIAL OF AN EARTH FORMATION - An apparatus for measuring spontaneous potential (SP) of an earth formation includes a downhole tool that is moveable within a borehole by conveyance means. A portion of the conveyance means produces a reference DC potential signal. The tool includes a measurement electrode that produces a potential signal representative of SP of the earth formation. The tool also includes circuitry that measures a differential DC potential signal between the potential signal produced by the measurement electrode and the reference DC potential signal. SP data that characterizes SP of the earth formation is generated based upon the output of such circuitry. In one embodiment for a while-drilling tool, the conveyance means and tool are realized by a drill string with an insulative sleeve that supports the measurement electrode and electrically isolates the measurement electrode from the drill string. Other embodiments for while-drilling tools and tools for tough logging conditions are also described. | 12-11-2014 |
My H. Lac, Westborough, MA US
Patent application number | Description | Published |
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20140292081 | POWER MANAGER - An improved power manager includes a power bus ( | 10-02-2014 |
20140292082 | POWER MANAGER - An improved power manager includes a power bus ( | 10-02-2014 |
Philippe Lac, Chambery FR
Patent application number | Description | Published |
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20140065028 | CEMENT CLINKER MANUFACTURING PLANT - A cement clinker manufacturing plant that includes a plant for producing purified syngas, obtained from solid waste, and process for transferring ash recovered from the ash pan of the gasifier to at least one inlet of the feedstock conversion device, which the plant includes, and/or of the furnace for the purpose of incorporating said ash into the feedstock; and a process for conveying the purified syngas to the main tuyere of the furnace and/or to at least one inlet of the feedstock conversion device. | 03-06-2014 |