METHOD OF PROGRAMMED REGULATED MAINTAINING RESERVOIR PRESSURE AT OIL EXTRACTING Russian patent published in 2009 - IPC E21B43/00 C01F1/00 F04B23/00 

FIELD: oil and gas industry.

SUBSTANCE: suggested invention refers to oil producing industry. The method of programmed regulated maintaining of reservoir pressure for intensification of oil withdrawal includes water supply from a pump via a collector and a row of automated shut-off and regulating facilities-regulators to high pressure of liquid with mechanical impurities; the said regulators consist of a separating connection chamber and an output collection chamber. The chambers are united between them with electromagnetic valves regulated from a controller by feedback with electromagnetic flow meter. The separating connecting chamber is formed with an input connecting flange and a connecting case with seats for ceramic bushings. The output collection chamber is formed with a flange pass-through case and an output connecting flange. The multi-channel multi-shut-off regulating facility installed before a pressure well creates a row of controlled dynamic conditions of liquid flow both interrupted from short to durational stops of flow with various amplitude values and continuous flow with preset nominal-core value of amplitude from constantly open part of gates and fluctuating in the mode add-diminish by means of opening, shutting-off or simultaneous operation of the other part of gates regulated by individual programs from the controller; in its turn this creates a row of controlled gradients of flow rate in non-uniform oil reservoirs and changes oil extraction from weakly permeable layers.

EFFECT: increased oil withdrawal from reservoirs.

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