FIELD: oil and gas industry.
SUBSTANCE: marker consists of marker patch plate made of material with high plastic properties fixed by force of magnetic interaction between the patch plate and steel pipe installed on top of the pipeline, a landmark with information signage coming to day surface, at that one patch plate is used with several magnets placed at the patch plate surface so that magnetogram of the patch plate scanning contains a code allowing identification of the marker, at that magnets may have different magnetic moments and code may be displayed as a letter, a figure or a sign or their combination.
EFFECT: unambiguous identification of the marker at magnetogram and reduced labour intensity of the marker mounting at the pipeline.
3 cl, 2 dwg
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