The book "Calculation of mechanical transmissions of oilfield and drilling equipment" by L. N. Obishchenko is an indispensable work for specialists in the oil and gas industry, engineers and students studying mechanical systems. In this work, the author examines in detail the key aspects of the design and calculation of mechanical gears, which play a critical role in the effective operation of equipment used in oil production and drilling. From the first pages of the book, the reader plunges into the world of complex mechanical systems, where every detail matters. Obishchenko shares his knowledge and experience, explaining how to correctly select and calculate mechanical transmissions to ensure the reliability and durability of the equipment. The book covers a wide range of topics, including motion transfer theory, load calculation, material selection, and design features, making it relevant to both practicing engineers and technical university students. This work will be of particular interest to those seeking to deepen their knowledge in the fields of mechanics and engineering. Students studying in specialties related to the oil and gas industry will find in it useful tips and practical recommendations that will help them in their future professional activities. Engineers working in the field of design and maintenance of drilling equipment will be able to use the acquired knowledge to optimize their processes and increase efficiency. The topics raised in the book range from the fundamentals of mechanics to specific issues relating to the design and operation of oilfield equipment. Obishchenko also focuses on modern trends and innovations in the field of mechanical gears, which makes the book relevant in a rapidly changing market. Readers will be able to learn about new materials and technologies that can significantly improve the performance of equipment. The author's style is distinguished by clarity and accessibility of presentation, which makes it easy to assimilate complex technical concepts. L. N. Obishchenko is an experienced specialist who is not only a theorist, but also a practitioner, which gives his work special value. His other well-known works are also devoted to mechanics and design, and they have already won recognition among professionals in this field. If you are looking for a book that will help you understand the intricacies of calculating mechanical gears, “Calculation of mechanical gears of oilfield and drilling equipment drive” will become your reliable assistant. This is not just a tutorial, but a real guide to the complex world of mechanics, which will help you become a more confident and qualified specialist. In conclusion, this work is not only a source of knowledge, but also an inspiration for those who want to develop in the field of oil and gas engineering. Book L. N. Obischenko is a step towards professional growth and deeper understanding of mechanical systems that play an important role in our lives. Do not miss the opportunity to discover this fascinating world of mechanics and design!