FIELD: oil and gas industry.
SUBSTANCE: device to be used in a well contains metal element with longitudinal axis, antenna with at least two separated groups of grooves made in metal element including at least two rows of grooves each and at least one electrical conductor. In each row of grooves there are at least two grooves. Each groove is made by its cutting in metal element surface. Rows in specified at least two groups of grooves are located in essence on opposite sides of metal element. Conductor is laid along each row of grooves and through each groove in grooves row. Section of electrical conductor passing along each row of grooves is unorthogonal to longitudinal axis of metal element.
EFFECT: increasing strength and rigidity of pipe.
20 cl, 8 dwg
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