DOWNHOLE TOOL AND METHOD OF ITS USE Russian patent published in 2023 - IPC E21B33/129 E21B23/01 

FIELD: drilling.

SUBSTANCE: the invention relates to a downhole tool that can be used to isolate the wellbore. A downhole tool for isolating a wellbore for hydraulic fracturing is claimed, containing a taper mandrel containing a distal end, a proximal end, an outer surface and an inner flow channel, and the taper mandrel additionally contains a ball seat formed in the inner flow channel, a support ring engaged in a sliding manner with the proximal end of the taper mandrel. The support ring additionally contains the outer groove for the sealing element, the sealing element located in the outer groove for the sealing element, a wedge die connected to the distal end and a lower sleeve connected to the slip. In this case, the slip contains at least one groove of the slip, which forms a side hole in the slip, which is determined by the depth that extends from the outer surface of the slip to the inner surface of the slip. Moreover, the outer surface contains the first inclined surface and the second inclined surface. In this case, the first inclined surface contains the first plane, which in cross-section is intersected in half by the longitudinal axis at the first angle in the range from 5 to 10°, and the second inclined surface contains the second plane, which in cross-section is intersected in half by the longitudinal axis at an angle negative with respect to the first angle. Moreover, the first inclined surface and the second inclined surface converge at the crest, and the crest has a crest wall thickness exceeding the wall thickness of the furthest distal end and the wall thickness of the nearest end.

EFFECT: providing a reliable seal in relation to the surrounding tubular element while simplifying the design of the device

20 cl, 11 dwg