METHOD FOR CLEANING BOTTOMHOLE ZONES OF PRODUCERS AND INJECTION WELLS AND DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2020 - IPC E21B37/00 

FIELD: oil, gas and coke-chemical industry; construction.

SUBSTANCE: group of inventions relates to mining, oil producing and construction industries, in particular, to installations for impact on formation, for cleaning of bottomhole zones and filters of producers and injection wells, as well as compaction of soil and concrete. In carrying out the method, cleaning is performed with cycles alternating in each cycle of waves of compression and rarefaction of borehole fluid, depending on degree of contamination of oil reservoir, repeatedly, using receivers of different capacity. Each cleaning cycle is performed by an outlet high-speed pneumatic generator via a docking unit, and the well is filled with a borehole fluid, after which well fluid supply line by means of high-speed outlet pneumatic generator is closed, then a control signal is sent from the control panel to electromagnetic valves, by which inlet pneumatic generators are initiated, through which compressed gas agent stored in receivers is instantaneously discharged through the docking unit into the well with creation of pressure on the well fluid and formation of a gas cushion above its mirror. In order to create negative pressure in gas cushion, high-speed exhaust pneumatic generators are immediately closed, and upon arrival of reflected borehole wave, outlet pneumatic generator is opened into discharge line. When amplitude peak passes, outlet pneumatic generator of discharge line is sharply closed, creating reflected wave, by means of which oscillation process in well is repeated.

EFFECT: high-quality cleaning and continuous production cycle, exposure of formation fluids and compaction of soil before piling.

7 cl, 9 dwg