The process of thermal-oxidative degradation of polymer materials has been studied on the example of polyethylene in the presence of quinones and / or nitroxyl radicals. The synergistic effect of the positive action of a mixture of stabilisers from a number of quinones and nitroxyl radicals on the destructive process of polyethylene has been established. It has been shown that the rate of degradation has significantly slowed down when an equimolecular mixture of 4-acetylamino-2,2,6,6-tetramethylhexahydropyridine-1-oxyl and 2,6-di-tert-amyl-1,4-cyclohexadienone inhibitors has been introduced into the polymer. The kinetics of the initiated thermo-destructive process of polyethylene oxidation in the presence and absence of stabilisers has been studied. A mechanism of joint action of stabilisers based on their interaction with radicals and the breakage of radical chains, as well as a mechanism for the regeneration of stabilisers, has been proposed.

One of the possible ways to solve environmental problems in oil industry is the introduction of technologies that are safe for the environment. Of particular interest in this regard are technological liquids (drilling fluids) on a polysaccharide basis with use of natural polymers. The most accessible for the application of polysaccharides are starch, xanthan and guar gum, ritizan. These structure-forming biopolymers have a set of unique properties that allow to effectively manage the rheological characteristics of drilling fluids. The article analyses the results of research on the practical application of the most available biopolymers in oil production. The main characteristics of polysaccharides are considered, their influence on the efficiency of oil production is estimated. It shows the advantages of the rheological properties of drilling fluids based on xanthan gum and ritizan.

The article assesses the environmental safety of drilling fluids that are currently widely used in the oil and gas industry. It shows active development of water-based drilling fluid systems using xanthan biopolymer.