Patent ID: 6863125

Claim:
Device for operating a free flowing or gaslift oil wells comprising a lift tubing string employed to lift liquid and gas, and a device for modifying of structure of a gas-liquid flow placed inside said tubing string wherein said device for modifying of structure of a gas-liquid flow is made in a form of, at least, one float ball valve where radius and weight of the ball are selected depending on speed of the gas-liquid flow in accordance with the following formulas: V ≥ R ⁡ ( ρ - ρ M ) ⁢ g 3 ⁢ ρ M ⁢ { ln [ 1 1 - ( R R T ) 2 ] - R 2 R T 2 } , ⁢ G = 4 3 · π ⁢ ⁢ R 3 ⁡ ( ρ - ρ M ) · g = F where V—speed of gas-liquid flow, G—weight of a ball, F—flow drive force, R—radius of a ball, ρ—specific gravity of the ball, ρ M —specific gravity of the gas-liquid mixture, g—acceleration of gravity, R T —inner radius of tubes of a lift tubing string.