Energy Model of Ground Cutting Well Drilling

Abstract

It is proposed to determine the frequency of rotation of the bit by the length of the crack that occurs during the brittle fracture of materials. Tensile stresses in the soil mass during drilling are achieved by an appropriate choice of the cutting angle of the tool. According to the critical length of the crack in the tensile volume of the soil, the thickness of the soil chips cut off in one revolution is found, i.e. specific feed, and on it the frequency of rotation of the tool. The choice of the optimal cutting angle and bit rotation speed ensures the minimum energy consumption for cutting the soil. While drilling wells, the devised method for finding the soil loading frequency eliminates the need to calculate the oil recovery factor, and it is the first estimate in justifying the tool rotation frequency when drilling rocks of varying strength.