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The article presents the study of a hydraulic hammer device for rotary well drilling. The mathematical model of the hydraulic hammer device has been described and studied, the relation of the dynamic load changes on the rock-destruction tool from the principal parameters of the hydraulic hammer device have been obtained. The trial rotary boring with the use of a hydraulic hammer device in drill tool assembly has been carried out, an increase in the drilling penetration rate has been achieved by 47%.

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The paper presents laboratory studies of impulse water injection on the rock samples. A large number of experimental data were obtained. According to the experimental data, a regression analysis was carried out, on the basis of which qualitative correlations between factorial and resultant characteristics were revealed. Taking into account the mathematical analysis of the data obtained, graphical dependencies were constructed. As the fluid oscillation frequency increases, the amount of liquid passing through the sample of the porous medium increases, with the greatest value of fluid leakage through the rock samples reaching in the frequency range 600 ... 1000 Hertz.