FIELD: technological processes.
SUBSTANCE: invention relates to a drilling tool. The invention proposes a device for disconnection of a drill string, which includes in a longitudinal direction the first structure intended for attachment to a pipe of the drill string, the second structure intended for supporting a drilling cutting tool and movable relative to the first structure, and an assembly of the pusher between the above said first structure and the above said second structure. With that, the pusher assembly is intended to perform a pushing force on the above said second structure to divert the above said second structure from the above said first structure; with that, the above said pushing force is constant for any position of the second structure relative to the first structure. Besides, the pusher assembly includes a balancing mechanism containing an elastic element and an output lever, and a device for connection between the above said output lever and the above said second structure for application of the pushing force in a longitudinal direction. With that, the elastic element performs an elastic force proportional to compression of the elastic element. The output lever is connected to the above said elastic element and is capable of being rotated about an output axis. The invention also describes a drill system containing the above said device, and application of this drill system.
EFFECT: reduction of loads tested with a cutting tool at resistance in a longitudinal direction.
22 cl, 8 dwg
