FIELD: mining.
SUBSTANCE: suggested group of inventions is related to the field of drilling, namely, to devices for maintenance of magnetic field for measurement of distance in process of drilling. Suggested device is arranged with the possibility of connection into drilling pipe, and may represent drill bit, stabiliser or electric motor. At that device is arranged with the possibility of two functions performance, the first of which is rock destruction, stabilising function or actuation of drill bit, and the second function is maintenance of magnetic field. At that source of magnetic field is connected to device so that its axis is perpendicular to device axis. At that source of magnetic field comprises multiple magnets, axes of which are parallel to each other and perpendicular to device axis, and every magnet is combined in common polar direction.
EFFECT: increased reliability of magnetic device operation in well in process of drilling.
38 cl, 6 dwg
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