Drilling of wells is accompanied by expenditure of a certain amount of energy, which is spent to overcome friction in the ground “equipment, to rotate the drill string, the destruction of rock at the bottom hole and the friction of the drill tip on the rock.The article analyzes the power formulas and gives the results of experimental studies of two components of power: 1) on the destruction of rock and friction of the drill tip; 2) on the rotation of the drill string.