SELECTION OF THE SCHEME AND THE CALCULATION OF THE PARAMETERS OF A SMALL-SIZED FACE HYDRAULIC ENGINE FOR WELL DRILLING
The initial prerequisites /or the creation o/ a small-sized /ace hydraulic engine /or well drilling are stabilization o/ borehole walls, reduction o/ energy consumption o/ the drilling process o/ wells, requirement to change to the high rotating /requency o/ rock cutting tool and their technological advantage in directional drilling. It was developed a basic diagram o/ a three-section jet- hydrodynamic small-sized/ace hydraulic engine with outer diameter o/70 mm used in well drilling with the usage o/ diamond rock cutting tools with diameter o/ 76 mm. The principal difference scheme provides the reduction o/metal consumption and the washing liquid, higher values o/output power parameters, which has been proved by practical calculation, confirmed experimentally.