Research of diesel influence on the rubber elastomer screw downhole motor within the temperature range 25-90°С

The scientific work is devoted to the influence of diesel fuel on the geometric parameters of the rubber samples IRP-1226, which is one of the basic materials for the production of elastomers, screw downhole motors. We consider the results of studies for the temperature of the medium range 25-90°C.
Материалы и методы
We tested samples of rubber IRP-1226 through total immersion in diesel fuel. Experiment duration was 480 hours. The range of temperatures 25-90°C in experimental work.
Results
It proved the effect of the dispersion medium of mud (in this study - diesel) and temperature on the state of the elastomer screw downhole motors. A description of the processes occurring in the elastomer under the influence of different temperatures in the presence of diesel fuel. Characterized by the possible impact of these processes on the technical characteristics of the screw downhole motor. Application of the results will allow to develop a technique to improve the resourse elastomers screw downhole motors.
Сonclusions
Research results confirmed the effect of diesel fuel on the geometric parameters of the elastomer PDM. The temperature point at which the greatest influence on an elastomer calculated magnitude values relative deformation. A hypothesis about the structural changes in the rubber under the influence of diesel fuel and their impact on the work of the elastomer screw downhole motors was made. The research results can be used for testing of alternative materials for the production of elastomers and chemical materials for protection for the rubberIRP-1226 during operation of the screw downhole motor. Further research will focus on integrated impact downhole conditions on the technical condition of the elastomer in order to create a mathematical model of his work and wear.