FIELD: oil and gas production.
SUBSTANCE: device consists of tubes, couplings and/or subs and is made as at least one permanent magnet. The sub functions as magnetic conductor. The permanent magnet is made out of plasto-magnet and it contains at least one pair of parts with their opposite poles facing each other. The permanent magnets can be installed in a case.
EFFECT: increased service life and oil output of wells.
13 cl, 19 dwg
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