Patent ID: 9255470
Filing Date: 2016-02-09
CPC Classification: E21B

Claim Text:
1. A method of increasing productivity of oil, gas or water wells, comprising the steps of excavating of a horizontal or inclined well; forming in the horizontal or inclined well a plurality of cavities which extend transversely to a direction of elongation of the horizontal or inclined well and are spaced from one another in the direction of elongation of the horizontal or inclined well so as to form a plurality of partitions therebetween; providing packing in the horizontal or inclined well by packers; and executing hydrocracking by acting onto the partitions located between the cavities inside the horizontal or inclined well, making the cavities as slot-shaped cavities which redistribute stresses in a rock so that a concentration of stresses around the horizontal or inclined wall is substantially removed and directed to edges of the slot-shaped cavities; and forming the slot-shaped cavities so that the partitions between them have a length corresponding to the following equation: where