BOREHOLE FORMATION TREATMENT DEVICE Russian patent published in 2020 - IPC E21B43/263 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, namely to the field of pulse technologies of oil production intensification and designs of devices for their implementation. Proposed device comprises charge assembly. Assemblage of charges consists of sequentially arranged head, adapter, two groups of charges, pipe with tip. Head is connected to the cable head, in the inner hole of which the braid is fixed to the geophysical cable by means of the fixing tape. Entire assembly is strung on the braid and fixed thereon. First group includes active charges with volume and dynamics of gas release during combustion, providing creation of pressure pulse in the well with value exceeding mine pressure. Second group consists of main charges with lower dynamics and high volume of gas release in comparison with charges of the first group. It provides creation of secondary pressure front, pulse of which exceeds time of first pressure pulse action. In central axial hole between the charges in each of groups, as well as between the first and the second groups of charges there are split centering bushings. They center charges between groups and group charges relative to each other. Between the first and second groups of charges there is a centraliser holding the second group of charges at a given distance from the first group. This distance is defined by analytical expression.

EFFECT: higher reliability and efficiency of the device, increased number of cracks of the required size in the formation.

3 cl, 6 dwg