After a long break, with the participation of a wide range of authors, the problems arising in the cancellation of oil and gas wells, the deactivation of pyrophoric iron sulfides, which are dangerous for fire and explosion, accidents that may occur in steam boilers and measures aimed at their prevention, the preparation of gases for transportation in underground gas reservoirs and the study of environmental protection, The results of scientific-research works on the study of the effectiveness of the labor safety system in enterprises, the investigation of the problems that arise during the operation of metal melting furnaces, the improvement of the efficiency of the throttle knot by improving it, the modern state of the elevator industry in Azerbaijan and the development prospects were reflected. We sincerely congratulate the authors and the staff of the Institute on the publication of the obtained scientific-research works, and wish them success in their future work.