Models support potential for drilling deep microholes

01/17/2000
Microboreholes-ConclusionAnalysis of developed models suggests that no fundamental or theoretical reason exists to prevent relatively deep microholes from being drilled with hydraulic motors deployed on a coiled-tubing drillstem.The models do not rule out high performance drilling at greatly reduced cost in many areas and, under some assumptions, actually support this premise, even in deep wells.Field testing of prototype microdrilling systems is needed to test and refine some of the predictions the simple models foretell.The potential size of borehole instrumentation using state-of-the-art electronics and sensors makes microholes ideally suited for such nonproducing holes as exploration,...
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