RU2000122603A - METHOD FOR PULSE TREATMENT OF PRODUCTIVE LAYERS AND WELL FILTERS AND DEVICE FOR ITS IMPLEMENTATION - Google Patents

Claims (5)

1. The method of pulsed treatment of productive reservoirs and well filters by pumping a uniform flow of a working agent through a pipe string located in the well and converting the specified stream into a pulsed flow and mechanical vibrations of a vibrator, consisting of a generator of fluid pressure fluctuations in the form of a tube operating in the periodically intermittent cavitation mode Venturi with inlet nozzle and diffuser, barrel and output device, characterized in that the static pressure of the working agent is determined in advance three pipe string above the inlet nozzle and the fluid in the annulus, set flow rate Q of the working agent and output device section to maintain the cavitation coefficient values equal to:

where P _1st = γ ₁ * H ₁ , P _1st = γ ₂ * H ₂ and P _1din , P _2din are respectively the static pressures above the inlet nozzle and in the annulus and the hydrodynamic drags in front of the inlet nozzle, before and after the output device, γ ₁ and γ ₂ is the specific gravity of the fluids supplied and located in the annulus, and H ₁ and H ₂ are the level of these liquids in the pipe string and in the annulus.  2. The method of pulse processing of reservoirs and well filters according to claim 1, characterized in that, in addition to the working agent, liquid is supplied from the annulus to the vibrator.  3. The method of pulsed processing of reservoirs and well filters according to claim 1, characterized in that the amount of fluid supplied to the vibrator is controlled by changing its specific gravity. 4. The method of pulsed processing of reservoirs and well filters according to claim 1, characterized in that, in the case of formation pressure of liquid and gaseous media, the flow rate D and reservoir pressure are determined by the static pressure in the annulus, and with a numerical value of the working flow agent Q, greater than the flow rate D, the supply of the working agent is carried out cyclically, stopping the supply of the working agent when the value of the cavitation coefficient τ exceeds 0.5, and resuming it with a decrease in static pressure in the annulus to a value equal to the reservoir pressure P _pl . 5. A device for pulsed processing of productive reservoirs and well filters, including a pipe string, a vibrator consisting of a fluid pressure oscillation generator with an inlet nozzle and a diffuser with an opening angle of more than 15 ^o , a barrel whose inner diameter is not less than 4 times the inner diameter the input nozzle and the output device, the input nozzle in communication with the pipe string and diffuser, and the output device with the barrel and the annulus, characterized in that it is provided with a jet placed above the vibrator pump, consisting of a nozzle receiving chamber, the mixing chamber and diffuser, wherein the inlet nozzle of the jet pump communicates with a tubing string, a mixing chamber through a check valve receiving chamber and - with the annular space, and its cone - with an inlet nozzle of the vibrator.