METHOD AND SYSTEM FOR TRANSMITTING INFORMATION IN A JET DRILLING SYSTEM
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United States of America Patent
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Jul 23, 2015
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Jul 25, 2014
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Abstract
An abrasive jet drilling system is employed for transmitting information from a downhole location to a surface location. A jet drilling system is provided, with a drill string extending from surface to a downhole location in a borehole. A fluid flow with a mixture of drilling fluid and a quantity of abrasive particles is generated in the drill string. The quantity of abrasive particles in the mixture is modulated in dependence of information obtained regarding a downhole condition, to generate data pulses downhole which are detected at surface. A transmitted downhole condition is determined based on the detected data pulses.
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