WELL FISHING DEVICE Russian patent published in 2005 - IPC

FIELD: mining industry, particularly fishing devices to eliminate failures resulted from drill pipe breakage.

SUBSTANCE: fishing device comprises body and ball-like clamping means connected to the body by flexible links. A spring-loaded rod with rest formed at lower end thereof is telescopically installed in rod. Rest is made as centering cone. Arranged on the cone is transmitting bushing performing axial displacement and cooperating with ball-like clamping means in working position. Transmitting bushing consists of two halves detachable along axial channel and rope suspension bracket is arranged in axial channel. Axial channel is curvilinear. Bushing halves are secured one to another by fasteners.

EFFECT: reduced labor inputs and elimination of rope suspension member rupture by transmitting bushing during its lowering into the well.

1 dwg