VORTICAL DRY POWDER EXTINCTION METHOD OF BURNING BLOWS AT GAS, OIL AND GAS-AND-OIL WELLS Russian patent published in 2017 - IPC E21B35/00 A62C3/02 A62C3/06 A62D1/00 

FIELD: fire safety.

SUBSTANCE: method of vortical dry powder extinguishing of burning blows at gas, oil and gas-and-oil wells includes placing on the ground surface of the explosive substance in the form of multiple concentric circular charges along the closed loop, enclosing the jet fire of the well. Lay over the charges by extinguishing powder. Carry out the blowing up of the charge with smaller radius the first, the blowing up of the next charges with a time delay, the delivery of fire extinguishing powder to the combustion area by the impact wave energy and the creation of a vortex ring, moving along the axis of the jet from the bottom to the top. At that, while forming the charge of the smaller radius and laying over it with fire extinguishing powder, as the latest it is used the nanopowder, which at forming the vortex ring generates in the controled area the concentration of nano-powder, sufficient to inhibit the fire and explosion hazard environment within the time required to rise the mentioned vortex ring along the surface of the diffusion jet flame.

EFFECT: increase of fire fighting reliability.

2 tbl, 5 dwg