DEVICE OPERATING ON SOLID FUEL AND USED FOR WELL TREATMENT, AND ITS APPLICATION METHOD Russian patent published in 2013 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: device includes cylindrical powder tubular charges, including ignition ones, with different diameters of channels and ratio of lengths of charge channels to diameters of channels of (20-40):1, and load-carrying rope with structure fixing elements. According to the invention, device also includes cylindrical powder tubular charges of smaller diameters, which have ratios of lengths of charge channels to diameters of channels of (6-80):1 and ratio of outer diameters of charges of smaller and larger diameter of (0.6-0.95):1. At that, charges of different diameters are alternated. Besides, charges with smaller diameters and ratios of lengths of channels to diameters of channels of (40-80):1 are provided with external annular grooves and through channels in places of grooves. Charges of larger diameter have shells to be protected against friction in the well. On edges of alternating charges there fixed are discs with annular projections entering each other at assembly of charges.

EFFECT: increasing production efficiency of hydrocarbons; enlarging the application scope of the device; improving its reliability for wells, including at increased temperatures and pressures.

2 cl, 1 ex, 1 dwg