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... reporter marker society of petroleum engineers upstream oil & gas gas well productivity multistage hydraulic intensity The filtering device was removed from the bypass line with each new sampling, and all elements of the filtration compartment (with the exception of plugs) were removed...

... for Regulatory Agency (ANP); This paper was selected for presentation by an SPE program committee following review of information contained in an abstract submitted by the author(s). Contents of the paper have not been reviewed by the Society of Petroleum Engineers and are subject to correction...

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