Main issues of hydromechanics of production injection wells are described. The conditions for the combined operation of the well bed and pumping equipment as a single hydraulic system for various oil production methods are discussed in detail. A graphical interpretation of the studied issues is given in two versions: through the heads at the bottom and on the well buffer and through the pressures. A special place is given to the skinfactor, the conclusion of the formula for its calculation, physical interpretation and geometric interpretation of its meaning. For university students studying in the specialty "Physical processes of mining or oil and gas production," the direction of training certified specialists "Mining."