BLAST-HOLE MAGNETIC COMPLEX FOR FORMATION FLUID PROCESSING IN BOTTOM-HOLE ZONE Russian patent published in 2017 - IPC E21B37/00 E21B43/10 

FIELD: mining.

SUBSTANCE: blast-hole magnetic complex for formation fluid processing in bottom-hole zone includes a magnetic unit consisting of a ferromagnetic cylindrical shielding screen, a ferromagnetic tube element installed inside it, and permanent magnets arranged around the noted element. The ferromagnetic tube element is elongate, extending beyond the magnetic unit. The complex further comprises a downhole filter rigidly connected to one end of the noted elongated tube element and mounted at a distance 700 mm and more from the nearest magnet of the magnetic unit, and further comprises a pipe sleeve connected to the other end of this elongated tube element. The diameter of the branch pipe is equal to the diameter of the well tubing strings. The magnetic unit by way of magnets contains at least two shunted permanent ring magnets mounted on a tube element with a gap of 150-250 mm with a total magnetic mass of not less than 1200 grams, configured to create a magnetic field in the tubular element with an axial component strength of 15000-30000 KA/m. The magnetic unit and the pipe sleeve are sealed by a protective shield.

EFFECT: prevention of asphaltene-osmoloparaffin deposits and reduction of fluid corrosion activity in wellbores.

2 cl, 1 dwg