DOE: ‘Microhole’ coiled tubing drilling holds promise

12/18/2006
A federally funded technology that could change the way oil and gas wells are drilled was successfully demonstrated in the US Midcontinent, the US Department of Energy said.A specially designed hybrid “microhole” coiled tubing rig recently drilled 25 test wells to penetrate the Niobrara, a particularly intractable gas formation in western Kansas and eastern Colorado. The effort delivered cost savings of 25-35%/well drilled compared with conventional drilling equipment, DOE’s Fossil Energy office said.It said about 1 tcf of shallow gas that had been bypassed by conventional drilling has become economic as a result. The volume equates to about 5% of the country’s ann...
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