RESEARCH OF WEAR RESISTANCE AND MECHANISM OF ABRASIVE WEAR OF GAS THERMAL METALLIZED COATINGS USED FOR SEM PROTECTION

Abstract

Complicated operating conditions of oilfield equipment during oil production using ESPs require the use of additional measures to protect its main components from the effects of negative factors. One of the main and significant negative factors influencing the corrosive aggressiveness of the environment is the water cut of the produced oil, which contains a large amount of dissolved gases, such as carbon dioxide and hydrogen sulfide, which are characterized by high corrosive aggressiveness and are the main risk factors leading to corrosion of the oil field. equipment and their premature failure. The housings of submersible electric motors (SEM) are the most susceptible to corrosion of the ESP unit. According to statistics, about 70% of failures occur in the motor housing. Of the variety of protection methods, the application of gas-thermal metallization coatings is the most widely used for protecting motor housings. Despite the effectiveness of this method of protection, it does not exclude the occurrence of corrosion processes in the metal of the motor housing and possible damage and destruction. This article is devoted to studies of the corrosion behavior of various types of metallization coatings used to protect SEDs under the influence of one of the main aggressive components — carbon dioxide dissolved in the mineralized aqueous phase, by conducting autoclave tests that simulate in laboratory conditions the operation of the material, in particular its corrosion resistance when exposed to a corrosive environment.Conducting research in this area is an urgent task aimed at solving the problems of reducing the service life of oilfield equipment and their premature failure, in particular motor drive housings during operation in difficult conditions.