The article presents the results of theoretical and experimental studies of insulation of absorbing intervals during penetration of rocks. The proposed systematic approach makes it possible to effectively apply insulation methods in various mining conditions of well construction. The methods for controlling the absorption of drilling fluids in the conditions of abnormally low layer pressures are combined in a systematic technology.

Annotation Abstract: the characteristics of a pump with open and closed impellers are compared. The paper considers a model of a centrifugal pump for General industrial purposes. The simulation was carried out in the STAR-CCM + package. A graphical comparison of the influence of different pump design sizes on the parameters is made and the most suitable model is identified.