The mixing system makes possible improvements and presents case histories of field applications.
Fracturing operations have been improved by
(1) Mixing fracturing slurries under microprocessor control,
(2) Applying new baffle and agitator design concepts, and
(3) Using new methods for achieving rapid material wetting.
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Solids and the liquid phases of drilling muds invade and interact with reservoir formations. This invasion and interaction changes formation permeability and can prevent fluid flow from the reservoir into the wellbore. Damage caused by mud spurt and drilling-mud filtrate can influence log response. The full-length paper describes a novel method to determine the formationdamage potential of drilling muds by evaluating the erosional characteristics of mudcakes formed by different mud systems.
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Mud gun are meant to provide supplemental or primary mixing in mud tanks depending on the number being used and the pit size. They are best used in tank corners to keep solids from settling and a mud agitator is placed in the tank center.
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With three types of impellers Aipu mud agitators are available and are sized according to tank volume and expected duty. Active mud system compartments (such as solids removal sections, mud mixing sections and slug pits) need a higher shear blade to produce more immediate mixing. Bulk storage compartments need a low-shear blade that maintains suspension in a gentler manner.
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