Influence of rotational speed on technical and economic indicators of diamond drilling
The article noted the features of the process of destruction of rocks during diamond drilling. It is indicated that diamond drilling can be effective only with a certain combination of drilling mode parameters: projectile rotational frequencies, crown axial load, flush fluid flow rate. It has been established that a rational rotation frequency depends on the physicomechanical properties of rocks, their structural and textural features, fracturing, as well as technical drilling conditions - the depth of the well, the state of the drill string and the diamond crown. In real conditions, the increase in the frequency of rotation of the projectile to the optimal parameters is limited by the power of the drives of drilling rigs, strength and increased wear of drill pipes, losses in energy transfer from the surface generator to the rocks of the face