Xanthan gum is a water-soluble biopolymer obtained by fermentation, it is widely used in water-based drilling, repair and injection fluids as a rheology modifier to achieve low shear viscosity and improve suspension properties.
In the oil industry, in hydraulic fracturing operations, works to improve oil recovery in the form of a solution with high plastic viscosity, provides excellent load-bearing capacity for pumping sand and proppant into cracks formed during hydraulic fracturing (drilling fluids with a gum content of up to 2 % for drilling horizontal and directional wells). That is, it is used for the preparation of drilling fluids as a structure-forming agent.
The biopolymer works effectively in all water — based drilling fluids-from heavily weighted to low-solids systems, including fresh, seawater, saltwater-based systems and dense brines; it provides a rheological profile of increased viscosity at low shear rates and lowers shear characteristics at high shear rates. These characteristics often lead to the formation of fluids where the ultimate shear stress is higher than the plastic viscosity.
Reduced shear forces minimize pressure loss and riser pressure inside the drill string and on the bit, to optimize hydraulic performance and maximum penetration speed.
In addition, the inter-tube space, where low shear forces are observed, has a highly effective viscosity for cleaning the well and slurry slurry.