PULLING TOOL Russian patent published in 2017 - IPC E21B23/04 E21B17/06 

FIELD: mining.

SUBSTANCE: group of inventions relates to a pulling tool intended for latch on an object, such as a blind plug, located in the wellbore. Pulling tool includes a base element elongated in the longitudinal direction from the proximal end, intended for connection to a cable tool, to the distal end, adapted for engagement with the object, and the latching mechanism, which surrounds the basic element and adapted for moving in the longitudinal direction between the deactivated position and activated position, containing piston clutch, key element designed for latching on a downhole object, and a piston spring acting on the clutch piston in the longitudinal direction to the proximal end of the basic element. Moreover, the key element is arranged with opportunity of sliding inside the piston clutch and extends from the end of the piston clutch to the distal end of the basic element. Furthermore, the present invention relates to a wellbore search system for lifting of an object in a wellbore, and to a method of connection with the wellbore object and disconnecting of this search engine from it.

EFFECT: technical result consists in the improved of reliability of the pulling tool.

13 cl, 7 dwg