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Refracking offers hope to shale industry

The process could boost flow of crude and increase estimate of reserves held in the well

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Because the first step in the fracking process is already done - the drilling of the wellbore - the outlay for refracking is a fraction of the US$8 million or so it costs to tap a new well.

Houston

THE technique itself is nothing new. Oil crews across the world have been schooled on its principles for generations: Identify ageing, low-output wells and hit them with a blast of sand and water to bolster the flow of crude. The idea originated somewhere in the plains of the

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