FIELD: mining.
SUBSTANCE: device for plug removal comprises a tubular jacket, a circular jacket and a piston. A plug is installed in the seat of the tubular jacket. The lower part of the circular jacket under action of the applied force is pressed into the plug material so that the material is ground. The piston is arranged above the circular jacket and acts with the specified force at it during axial displacement by hydraulic pressure. The lower part of the circular jacket has a flange stretching radially inside. As a result of axial displacement of the piston the flange moves radially inside to the plug. There are slots in the wall of the circular jacket.
EFFECT: solution according to the invention makes it possible to avoid problems related to usage of explosives, which threaten safety, and also to eliminate ingress of shell fragments for charges of explosives into a well.
4 dwg
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