Jet Nozzles Jet Nozzles were introduced into the oilfield in 1948. These were necessary to increase bottom hole cleaning in deep wells. Prior to jet nozzles, the fluid course in bits was a hole bored into the center of the bit and the drilling fluid went from the drillstring directly into the annulus. These “conventional […]
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The concept that a fluid cannot maintain a rigid shape is a basic, but important characteristic, which means that fluids cannot sustain a shear- stress (a tangential force applied to the surface). Any tangential force will cause the fluid to deform and continuous deformation is known as “flow”. Fluid flow is always considered to take
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Drilling Fluids A drilling fluid is any fluid which is circulated through a well in order to remove cuttings from a wellbore. We will discuss fluids which have water or oil as their continuous phase. A drilling fluid must fulfill many functions in order for a well to be drilled successfully, safely, and economically. The
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