AZ ROC A-4 Drilling Practice Questions - Arizona ROC A-4 Drilling Examination Exam

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In direct mud rotary water well drilling, what is the primary function of the bentonite drilling fluid circulating down through the drill pipe and returning up the annulus?

Cooling the rig diesel engine radiator system Transporting formation cuttings to the surface and stabilizing the borehole wall Permanent sealing of the production aquifer Dissolving hard rock formations chemically

Correct Answer:

Transporting formation cuttings to the surface and stabilizing the borehole wall

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