DEVICE FOR CREATION OF GRAVEL WELL SCREEN IN PROCESS OF HYDRAULIC FRACTURING OF PRODUCTIVE FORMATION Russian patent published in 2024 - IPC E21B43/04 

FIELD: oil, gas, and coke-chemical industry.

SUBSTANCE: invention relates to oil and gas industry and can be used in construction and overhaul of wells. Device includes a shank filter with slot-like perforation channels, the inner cavity of which is plugged in the lower part. Cylindrical hollow housing is attached to the upper end of the shank filter. In the upper part of the housing there is an external annular groove, in the middle part there are through radial slots, and in the lower part there are longitudinal external projections. Inside the housing, there is a hollow cylindrical piston with conical slots on the outer side surface. In radial slots of the housing, there blocks are installed having the possibility of interaction with conical slots of the piston and radial movement relative to the housing. Self-sealing elastic collar is installed in the external annular groove on the body and in the transport position of the device it is placed in the inner cavity of the detachable casing coaxially attached to the pressure adapter. Upper end of the latter is connected to the tubing string, and the lower end is connected to the housing by means of destructible elements. In the central axial channel of the pressure adapter there is an internal annular projection, a sleeve is installed coaxially, and in it there is a seat, the through channel of which is covered with a ball shutoff member. At the ends of the sleeve there are annular protrusions: on the upper part - external, and on the lower one - internal. Through radial openings and channels are made in the pressure sub and in the sleeve. Seat in the transport position closes the radial channels in the sleeve, the sleeve and the seat are connected to each other by means of shear pins.

EFFECT: higher reliability and efficiency of the device and possibility of its retrieval to the surface is ensured.

1 cl, 7 dwg