FIELD: mining.
SUBSTANCE: group of inventions relates to a downhole pusher tool designed to create an axial force in an axial direction, a borehole system and the use of a downhole pusher tool to pull the plug in the well. Downhole pusher tool comprises a housing, a first chamber, a first portion of the tool comprising a pumping module for supplying fluid under pressure into said chamber, shaft passing through the chamber and the first piston dividing the first chamber into the first chamber section and the second chamber section. Above piston is connected to the body or forms its part, which forms part of the second part of the tool, and is made with possibility of sliding relative to the shaft so that it is possible to move the body relative to the shaft. Shaft is fixed relative to the pump module during pressure increase in the first or the second section of the chamber with provision of pressure on the piston. Shaft is rigidly connected to the first part of the tool, and the body is made with possibility of sliding relative to the first part of the tool and covers the first part of the tool.
EFFECT: technical result is higher efficiency of pusher tool.
18 cl, 9 dwg
