Chemical treating agents reduce flocculation in clay water drilling fluids by one of more of the following mechanisms; Removal of contamination be precipitation Reducing the contaminant effect by sequestering the contaminant Neutralizing flocculation by satisfying cationic charges on the clay particles Forms a protective film around the clay particles Phosphates Powerful anionic dispersants, only … Continue reading Chemical Treatment of Drilling Fluids
Tag: Mud
Types of Clays
The first type is needle spaded non-swelling clays eg. Attapulgite or sepiolite. The shape of the clay allows it to build viscosity. As a result of their shape and poor swelling characteristics they don’t exhibit poor filtration control. Attapulgite is used primarily as a viscosity builder in saltwater fluids. Sepiolite is used as a supplemental … Continue reading Types of Clays
Drilling Fluids: Cuttings Removal
As the cuttings are drilled they must be removed and brought to the surface through the annulus. The removal of the cuttings is a function of the size, shape and density in combination with the rate of penetration (ROP), drill string rotation, viscosity, density and annular velocity of the drilling fluid. Viscosity - higher viscosities … Continue reading Drilling Fluids: Cuttings Removal