FIELD: oil and gas industry.
SUBSTANCE: invention is related to controlled drilling of wells. The invention suggests the method for control of drilling direction for the drilling assembly inside producing formation that includes placement of the drilling assembly inside producing formation between the top electroconductive formation with direct-current magnetic field and bottom electroconductive formation with direct-current magnetic field; using a sensor to measure magnetic field in producing formation that includes sum of direct-current magnetic field of the top formation and direct-current magnetic field of the bottom formation; and controlling drilling direction inside producing formation using measurement results of the magnetic field. The device and drilling assembly are also suggested for implementation of the above method.
EFFECT: technical result consists in improved accuracy of wellbore passage within limits of the producing formation.
20 cl, 3 dwg
