Development of effective chemicals for drilling fluid based on local and raw materials

The paper presents the current state of chemical reagents used in the development and production of drilling fluids for oil and gas well drilling, based on local and raw materials from Uzbekistan. A novel and effective chemical reagent, MBR (drilling fluid lubricant), has been obtained from gossypol resin, a by-product of cotton oil production. Types of weighted water-based drilling fluids using bentonite, carboxymethylcellulose (CMC), MBR (Moylovchi burg'ilash reagent), barite, and hematite and their physical and chemical properties were investigated. Methods for testing drilling fluid properties were studied, and the compositions and contents of chemical reagents and weighting agents for the preparation of weighted drilling fluids have been provided. The water-soluble modified powdery resin contains hydrophobic additives based on sodium salt of fatty acids and ionic surfactants. The use of these reagents in drilling fluids for oil and gas wells ensures the preservation of regulated rheological and filtration properties of polymer systems at 80–190°C for 30–40 hours. A method for obtaining new effective chemical reagents based on the physical and chemical modification of initial materials under various ratios, environments, and regimes has been developed. The requirements for chemical reagents and weighting agents according to geological conditions of oil and gas boreholes have been studied. A new formulation of weighted drilling fluids based on MBR, barite, and hematite using salt water with densities of 2.15 and 2.41 g/cm3 has been developed and recommended for use in oil and gas well drilling. The application of these research results is expected to increase the lubricity of drilling fluid due to the use of the MBR lubricant, enhance the mechanical speed of drilling, and can help address certain ecological problems in the country through the utilization of cotton oil and fat production waste.

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