Diluted bentonite efficiently drills nonreservoir section

QATARI DRILLING FLUIDS-ConclusionUse of diluted bentonite water-base mud systems and a turbulent flow regime throughout the nonreservoir sections of Dukhan field, Qatar, has improved penetration rates and costs compared with non-damaging polymer mud systems.Furthermore, no operational problems have been encountered during use of diluted bentonite water-base mud systems.The rapid removal of cuttings allows each successive tooth impact to attack new rock, leading to increased penetration rates. For this purpose, high turbulent flow conditions at the hole bottom have become desirable.Thus, it is important to understand those drilling fluid properties that affect penetration rate including fi...

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