During oil field development inflow of oil gradually declines. Wax contamination considerably lowers penetration of oil sand and intensity of oil extraction. Injection of saturated steam is a simple and inexpensive solution for this problem. Mobile Steam Generator is created for effective cleaning of oil well pipelines and equipment from wax. High temperature and pressure of steam allow environmentally friendly recovery of oil extraction volume. The use of wet saturated steam also serves the purpose of purification of retrievable tools and pipes of different diameters while well-drilling, heating-up of pipelines, various equipment, utility systems and bulk cargo.