What are the three basic components of a drilling fluid?

The three main categories of drilling fluids are: water-based muds (WBs), which can be dispersed and non-dispersed; non-aqueous muds, usually called oil-based muds (OBs); and gaseous drilling fluid, in which a wide range of gases can be used.

What are the types of drilling fluids?

The three main categories of drilling fluids are water-based muds (which can be dispersed and non-dispersed), non-aqueous muds, usually called oil-based mud, and gaseous drilling fluid, in which a wide range of gases can be used.

What are the three major roles of drilling fluid?

Drilling fluids serve many functions: controlling formation pressures, removing cuttings from the wellbore, sealing permeable formations encoun-tered while drilling, cooling and lubricating the bit, transmitting hydraulic energy to downhole tools and the bit and, perhaps most important, maintaining wellbore stability …

What is PV in drilling mud?

PV represents the viscosity of a mud when extrapolated to infinite shear rate on the basis of the mathematics of the Bingham model. A low PV indicates that the mud is capable of drilling rapidly because of the low viscosity of mud exiting at the bit.

What is heavy mud in oil drilling?

By The Editors of Encyclopaedia Britannica | View Edit History. drilling mud, also called drilling fluid, in petroleum engineering, a heavy, viscous fluid mixture that is used in oil and gas drilling operations to carry rock cuttings to the surface and also to lubricate and cool the drill bit.

How many types of drilling fluid do we have?

three
Types of fluids. Drilling fluids include three main types: water-based muds, oil-based muds, and air.

What requirement should a drilling fluid meet?

To prevent drilling fluid damaging the oil and gas layer, the drilling fluids should be small filtration, thin mud cake, low solid content and low filtrate of hydration etc.

How do you calculate Yv and PV?

The plastic viscosity (PV) of the drilling fluid is calculated by subtracting the 300-rpm shear stress (R300) from the 600-rpm shear stress (R600). The yield point of the drilling fluid (YP) is calculated by subtracting the PV from the R300 reading. Multiplying the rpm by 1.7 changes the units to re- ciprocal seconds.