DOWNHOLE TOOL FOR EXTENDING A RETRACTABLE ELEMENT IN THE WELL TO PERFORM OPERATIONS IN THE WELL WITH THE TOOL AND A DOWNHOLE TOOL PIECE CONTAINING THE DOWNHOLE TOOL Russian patent published in 2023 - IPC E21B23/01 E21B23/03 E21B23/14 

FIELD: oil and gas.

SUBSTANCE: group of inventions is claimed, including: a downhole tool for pulling out a retractable element in a well to perform an operation in the well with the tool and a downhole tool kit. A downhole tool for pulling out a sliding element comprises a tool body having an outer diameter of the tool and a longitudinal extension. It also comprises a radial passage extending in the radial direction perpendicular to the longitudinal extent. The radial passage has a first passage portion having a first inner diameter and a second passage portion having a second inner diameter greater than the first inner diameter. It also comprises a retractable element located and forming a piston in the radial passage. The retractable element has an open first end and a closed second end, the retractable element has a retracted position and an extended position in which the second end is extended from the first part of the passage, the retractable element comprises at the second end the first part of the element having a first outer diameter corresponding to the first inner diameter, and the second part of the element having a second outer diameter corresponding to the second inner diameter, and in the retracted position, the sliding element and the second part of the passage form an annular cavity closed by the second part of the element. It also comprises a hollow body having an open end and a closed end. The open end extends into the open first end of the extension to form a chamber therebetween, and the open end of the hollow body has an outer diameter that matches the inner diameter of the extension. It also comprises at least one spring element located in the chamber and connected to the closed first end of the sliding element and to the closed end of the hollow main part for retracting the sliding element. A pump configured to pump fluid into the chamber through the fluid channel to move the extension to an extended position is provided. The annular cavity is filled with a fluid that leaves the annular cavity when the retractable member changes its extended position, minimizing the annular cavity.

EFFECT: creating an improved downhole tool that allows the parts to be extended radially outward to a greater length than in known tools.

15 cl, 6 dwg