This article is devoted to the study of the process of crack formation, which are actively manifested during rotational impact drilling. The studies conducted during the writing of the article show that simultaneously with the destruction of the bottom of the well, another process occurs â the formation of many cracks in the angular (peripheral) zones of the bottom and on the walls of the well, going to a depth of 5-10 mm. These cracks remain in the form of a dense network in the walls of wells and in the core (during its selection), and the depth of the cracks increases with increasing impact energy. An attempt was made to explain the mechanism of cracking in the core during impact-rotational drilling from the standpoint of the theory of off-center impact. However, the study of cracking occurred when drilling wells on blocks of rocks. With the rotary-impact method of drilling deep horizontal wells, the types and distribution of loads in the near-well array will be different. This article presents technologies that increase the volume of production in depleted fields. During the calculations, the dependences of the impact force of the transmitted seal (rock) depending on its compliance are given. In addition, a graph of the dependence of changes in the impact force of the striker on the anvil on the impact time with different malleability of the anvil is constructed. The process of forming a horizontal well, which is drilled with a continuous face in a shock-rotational way using hydraulic impact machines, is considered. To study the process model, the results of solving the problem of stress distribution around the trunk array of a vertical well were considered.