Preparation of oligosaccharide CQ01 and its lubricity in drilling fluid

Based on its good water solubility, temperature resistance and environmental protection, oligosaccharides are widely used in food beverage, baking medical care. In view of the poor lubrication performance drilling fluid ultradeep wells, long horizontal wells highly deviated problems protection faced by lubricants, application is limited. Therefore, order to reduce limitations improve application, it necessary study oligosaccharides. Using vegetable gum rich as raw materials, oligosaccharide CQ01 high-performance lubricant can be developed, action efficiency experimentally investigated. High meeting requirements engineering performance, compatibility evaluated laboratory experiments. The results show that has multiple effects increasing viscosity cutting, reducing filtration improving lubricating fluid. with low content adaptability bentonite. mechanism hydrophilic group (- OH) molecule adsorbed borehole wall rock surface or cuttings form a chemical adsorption film, resulting friction being separated film play role lubrication.