It is recommended to include surface strengthening by plastic deformation into technological process of manufacturing boring pipes and nipples connecting them, which are made of 40ХН steel. The main task of this strengthening operation is redistribution of technological tensile stresses in the material of thread roots, surface strengthening of the metal in the thread roots and formation of compression stresses in the metal, which are able to resist working stresses. The analysis of existing methods of surface plastic deformation showed that the only suitable method for qualitative treatment of thread roots is the method of vibrationalcentrifugal strengthening. This method belongs to the group of dynamic methods of surface plastic deformation (SPD) and provision of high level of energy of metal deformation of strengthened part metal is its peculiar feature and advantage. Purpose. Development of the method of vibrationalcentrifugal strengthening suitable for qualitative strengthening of thread surfaces, its adaptation to strengthening the outer taper thread, definition of the key technological parameters of strengthening treatment. The main tasks of the research were development and production of strengthening appliances suitable for strengthening the taper thread, functioning on the fundamental principles of vibrationalcentrifugal treatment. Development of schematics of original, out of standard vibration machines for strengthening the outer taper thread of boring pipes and nipples connecting them. Methodology. Based on the theory of statistical similarity of fatigue failure, methods are proposed for defining mass reduction and materials consumption of cylinders as a result of efficient strengthening of their inner and outer cylindrical surfaces by means of vibrationalcentrifugal treatment. Findings. As a basis of the structure of the developed appliances for strengthening thread roots of taper thread, there is taken provision of dynamic impact interaction of deformable rollers; whose shape is similar to the thread root profile, through rolling of a massive roller. Due to a small area of contact of a deformable roller with thread root material and large values of deforming cen trifugal force developed by the moving roller, the thread root metal is peened reliably and, most importantly, compression stress develops in it. Originality. For the first time, highly efficient equipment for dynamic strengthening of thread surfaces has been developed which knows no equals in strengthening treatment internationally. Practical value. The practical value is in improving reliability of drill pipes due to enhancing material strength of thread con nections of their elements. Industrial implementation of vibrationalcentrifugal strengthening treatment of thread elements of drill pipes, according to the authors, will decrease the number of cases of destruction of pipe constituents, which will contribute to decreasing repair and servicing time for drilling equipment, and will increase the borehole drilling rate.

Purpose. Development of new constructions of devices for strengthening drill and casing pipes by surface plastic deformation, determination of constructive and technological parameters of vibrational-centrifugal strengthening of long-length parts. Methodology. Based on the theory of static similarities of fatigue failure, methods for defining decreased mass and consumption of materials for cylindric parts as a result of effective strengthening of their outer and inner cylindricshaped surfaces by vibrational-centrifugal treatment are suggested. findings. Based on the experience of industrial use of vibrational-centrifugal treatment for strengthening plane wheel hubs and flanges, new constructive schemes of genuine devices for strengthening drill and casing pipes of exploration wells have been developed. To and durability of drill and casing pipes of exploration wells and to, The vibrational-centrifugal strengthening treatment is expedient to use during the final stage of pipes production with the purpose of increasing their reliability as well as decreasing their mass. This strengthening technology belongs to the group of dynamic methods of surface plastic deformation, features ability to dissipate considerable energy of deformation of strengthened part material in its surface layers which is equal to that of stamping. For parts made of construction steel, the vibrational-centrifugal strengthening treatment provides for the thickness of the strengthened layer within 0.15-0.20 mm, formation of residual compressive stresses of high gradient, enhanced micro-hardness. Due to technological use of considerable inertial forces of massive strengtheners, which are rolled over the surface during the strengthening process, effective reinforcement of metal of the surface processed and formation of residual stress in their metal thickness are provided. This effective strengthening of both inner and outer long surfaces allows decreasing the mass of long-length steel parts by 15-20 %. This provides for certain economic effect related to cost of part material. For the first time, structural schemes of equipment for strengthening outer and inner cylindric-shaped surfaces of long-length parts through vibrational-centrifugal treatment have been described, including those for drill and casing pipes. The suggested constructions of strengthening equipment have a simple constructive design, do not require first line maintenance workers, and are effective and energy-efficient. Originality. The developed designs of devices for strengthening long outer and, particularly, inner surfaces of cylindric long-length parts have no comparable counterparts internationally. Due to these designs, the spheres of effective use of surface strengthening increase considerably. Practical value. Material capacity of long-length parts strengthened by the suggested design of strengthening equipment decreases. On a 2-3-kilometer exploration well, the decrease in the drill string mass by 15-20 % as a result of strengthening treatment will allow saving about 30-...

Abstract.1 One of the promising ways to solve the problems of environmental safety is the creation of highly efficient methods of wastewater decontamination and destruction of organic compounds in them. The electromagnetic vibration cavitator was created to treat brewing wastewater. The efficiency of vibrocavitation treatment technology for the food industry was studied. The highest degree of decontamination from biological and organic contaminants was found to be provided by the combined action of vibrocavitation and related processing of gases, nitrogen in particular.

Запропоновано нову технологію водопідготовки для поливу та зрошування сільськогосподарських культур, яка базується на кавітаційній обробці води. Кавітаційною обробкою води її не лише біологічно знезаражують, але й видозмінюють структурну будову від кластерної до мономолекулярної, що разом із застосуванням пероксиду водню гарантує синергічний очищувальний ефект, знижуючи при цьому і необхідну концентрацію дезінфектанта. Фізико-механічні впливи на воду для покращення її властивостей зводяться до так званого явища "активації" води, яке супроводжується зазвичай зміною її структури, підвищенням розчинної здатності та зумовленої цим спроможності до ініціювання хімічних реакцій, насамперед окисних. Фізична суть активації води, незалежно від способу активації, полягає в руйнуванні кластерних структур. Адже передусім вода – це асоційована рідина, у якій молекули об'єднано в групи, що називаються кластерами, і окремих молекул води тут немає. А саме в мономолекулярному стані у воді спостережено підвищену хімічну активність. Саме мономолекулярна структурна будова молекул притаманна цілющій джерельній воді, саме за такої структури вода найкраще засвоюється рослинами та тваринним світом. Описано високопродуктивний низькочастотний вібраційний кавітатор для кавітаційного оброблення води, результати експериментальних досліджень впливу активованої кавітацією води на пророщування та ріст бобових та зернових.

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