METHOD FOR CONDUCTING HYDRAULIC FRACTURE TREATMENT IN INCLINED-DIRECTED OIL-PRODUCING WELL OPERATING TWO PRODUCTIVE FORMATIONS Russian patent published in 2021 - IPC E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, or rather to the implementation of an interval hydraulic fracture treatment in inclined-directed oil-producing wells that have opened and operated two productive formations. The method includes silencing the well, removing the existing downhole equipment, lowering into the well an arrangement consisting (bottom-up) of a funnel, a lower packer of the mechanical principle of action, a HFT coupling, an upper packer of the hydraulic principle of action, a mechanical locator of couplings, an emergency adapter, a connecting element. The packer is activated by the mechanical principle of operation, after which the fracture fluid is injected with the proppant agent under pressure, as a result of which technological cracks of HFT are created in the lower productive layer. The ball is discharged through the tubing string to the HFT coupling, hydraulic pressure of the fracturing fluid is applied to the tubing string, the upper packer is activated, after which the shear screws of the HFT coupling are cut, as a result of which the coupling circulation channels are opened, the fracturing fluid with the proppant is pumped through the arrangement under pressure, as a result of which technological cracks of HFT are created in the upper productive layer. After extracting the HFT arrangement, the well is washed.

EFFECT: development of a hydraulic fracture treatment (HFT) arrangement, which allows to conduct for two more volumetric hydraulic fractures in a row in an inclined-directed well without transplanting packers, thereby allowing to optimize the cycle of measures during hydraulic fracturing.

1 cl, 9 dwg