FIELD: mining.
SUBSTANCE: group of inventions relates to mining and can be used for installation of lower casing pipe in well shaft. Disconnecting tool (1), having axial length along axial line (2), comprises axial force generator (4), containing first part (5) and second part (6) and allowing second part axial displacement relative to first part along axial length, cable (3) supplying axial force generator, and element (7) containing leading part (8) and tail part (9). At that, second part is connected to tail part. At that, from leading part to tail part fluid medium channel (10) passes intended for fluid medium passage or fluid medium passing through element during second part displacement relative to axial force generator first part during disconnection.
EFFECT: technical result consists in increase of disconnecting tool reliability.
15 cl, 20 dwg
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