FORMATION IN THE WELL INTERVAL BY INTERVAL MULTI-STAGE HYDRAULIC FRACTURING PERFORMANCE METHOD AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC E21B43/26 F16K17/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry and can be applied for the interval by interval multi-stage hydraulic fracturing (MSHF) performance in wells with preferably horizontal completion or the reanimated wells sidetracks. Method consists in the fact that, determining the productive formation intervals for the fluid flow subsequent stimulation by the cracks creation, lowering the production string and performing the formation interval by interval fracturing. According to the invention, the production string is complemented with bursting branch pipes with the weakened longitudinal section, and the correlating the production string with bursting branch pipes lowering according to the results of geophysical studies, by which determining the intervals for the cracks formation in the productive formation array. After the production string or liner with bursting branch pipes lowering into the well performing its cementing and completion works, and then lowering the tubing string arrangement with the selective packer into the well into the productive formation array stimulation intended interval and after the packer seating and the process fluid supply to its arrangement under excessive pressure, bursting the branch pipe body at its weakened longitudinal cross section area with the technologically necessary gap formation therein. Then performing the productive formation intended interval fracturing with the propping material injection, such as proppant. Also disclosed is the method implementing device.

EFFECT: increase in the MSHF efficiency.

3 cl, 6 dwg