DEVICE FOR EXTRACTING PIPE SECTIONS Russian patent published in 2024 - IPC E21B43/10 E21B17/07 

FIELD: oil and gas industry.

SUBSTANCE: makes it possible to reduce axial loads when removing pipe sections, for example wire filters, in case of colmatation and clogging of the tubular annulus with mechanical impurities. A device for removing pipe sections, mainly filters, contains a column of pipes connected to each other by connecting elements with shear pins, with telescopic units in the form of a rod with couplings. The connecting elements are made in the form of a cylinder with stops at the ends, covering a rod equipped with an annular piston installed to form an annular chamber, closed in the upper part by a bypass valve in the form of a ring on the coupling body, with a seat on the upper stop. The lower stop is connected to the cylinder, equipped with a connecting coupling and an end valve under the annular piston, installed to interact with the end of the lower stop and block the radial holes on the cylinder body in the initial position, and shear pins are installed on the cylinder and connected to the annular piston.

EFFECT: reducing the axial load on the pipe string when removing the assembly from the well, as well as increasing the reliability of removing the assembly by eliminating the entry of mechanical particles from the sand plug into the axial channel.

1 cl, 4 dwg