DEVICE OF CYLINDRICAL FORM TO DIVIDE INTO PARTS METALLIC OBJECTS FALLEN TO WELL WITH USE OF ANODIC DISSOLUTION Russian patent published in 2014 - IPC E21B29/00 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry. The device includes housing (5) of cylindrical form made of dielectric in which two axially symmetric dead holes are made. Bottom of the upper hole is the bottom of cavity (9) for electrolyte. In the upper part of this cavity, at inner surface, there is thread with metal cover (13) screwed in it. At inner face of the cover (13) there is membrane (17) dividing the cavity into two - the upper cavity (16) over the membrane connected with inner cavity of production string (20) and providing connection to handling system and the lower cavity (9) for electrolyte located under the membrane. Inside this cavity there is an electric pump (8) connected to inner cavity of metallic tool-electrode (1) having cylindrical form. By its upper face with crew (4) it is screwed into the housing (5) and its lower face thickened at wall has dielectric pads (21). Tool-electrode (1) is connected to negative terminal of direct-current source located at day surface. Cut object being an electrode is connected to positive terminal of the same source through production string (20) that touches the cut object (19).

EFFECT: achieving high reliability in division into parts of fallen objects having different form and dimensions.

1 dwg