The problem of improving the efficiency of domestic oil companies in the exploration of complex fields, sinking wells in difficult conditions and reducing the material and time costs by reducing the accident rate of drilling oil and gas wells is considered. Relying on experience of leading operators of oil and gas service companies, developed countries in the last 10 years have managed to reduce costs for drilling wells of complicated designs and trajectories. It was achieved due to competent work organization and effective system of improving the quality of drilling by preventing well construction accidents. The project of structural reorganization of subdivisions when drilling particularly complex and costly wells was proposed. The created system will allow efficient use of material and labor resources with simultaneous improvement of professional training of engineering and service personnel.