IMPLOSION-HYDRAULIC PULSE DEVICE FOR STIMULATION OF WELLS Russian patent published in 2020 - IPC E21B28/00 E21B43/18 E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, particularly, to intensification of well operation. Implosion-hydroimpulsive device for stimulation of wells includes tubular housing of implosion chamber with side channels, from above connected to one-side hydraulic cylinder with side holes equipped with power piston, connected via rod with piston head, which is inserted into tubular housing with possibility of longitudinal movement under action of power piston rod and communication of side channels with implosion chamber in extreme position. Power piston is inserted into hydraulic cylinder with possibility of longitudinal movement downwards under action of excessive pressure and overlapping side holes to its lower position. Tubular casing is equipped with a limiter from below. Stem from below is equipped with annular narrowing with internal longitudinal channel equipped with upper lateral overflow channels. Spring-loaded support spring-loaded upward from the limiter and equipped with a side outlet interconnected with a longitudinal contraction channel is fixed at the bottom of the annular contraction. Head is installed with possibility of longitudinal movement along annular narrowing with tight overlapping of upper lateral overflow channels at movement upwards.

EFFECT: creation of alternating implosion and compression impact on formation of well with identical pressure drops irrespective of exposure repetition, and also injection of chemical reagents if necessary.

1 cl, 1 dwg