Adjusting for unbalanced phenomena using a hydro-pulser in flowing-gaslift wells

The article deals with the regulation of the gas-liquid mixture movement pattern by creating hydraulic impact pulses during the operation of gaslift wells, keeping it dispersed throughout the lift, reducing energy consumption for its lifting and, consequently, increasing the useful work factor. In this connection, a new high-frequency amplitude hydro-pulsing device has been developed. The device is placed inside tubing strings of gaslift wells, having a swivelling mechanism consisting of a body, two pairs of screens, located at right angles to each other, and wings, mounted on an axis. During well operation as a result of rotation of the blades and opening and closing of the gate the pressure under the blades changes, which causes separation of gas from liquid and creation of rarefaction. As a result, different velocity gradients of different magnitudes are created in different sections of the lifter, and the fluid pressure along the flow path changes discretely, i.e. the fluid acts “compressively” in one section and “tensile” in another cross section. The resulting impulse waves generated by this characteristic pressure distribution are transmitted to the bottomhole zone, ensuring that the gas-liquid mixture is dispersed through the lifter. The device was applied at well № 2187 of “Neft Dashlari” OGED. As a result, correction of unbalanced influences in the well bottomhole zone and lifting elevator was provided, oil flow rate increased from 2 t/day to 3 t/day.