ДО ТЕХНОЛОГІЇ ЗНОСОСТІЙКОГО ПОКРИТТЯ ДЛЯ ЕЛЕМЕНТІВ КОМПОНУВАННЯ НИЗУ БУРИЛЬНОЇ КОЛОНИ
Fatigue-corrosion destruction of drill string elements in a well that occurs during the drilling of deep wells is one of the problems of the oil and gas industry. At the same time, the reduction of friction forces between the elements of the layout of the bottom of the drill string and the walls of...
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| Datum: | 2020 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | Ukrainian |
| Veröffentlicht: |
Институт сверхтвердых материалов им. В. Н. Бакуля Национальной академии наук Украины
2020
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| Schlagworte: | |
| Online Zugang: | http://altis-ism.org.ua/index.php/ALTIS/article/view/165 |
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| Назва журналу: | Tooling materials science |
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Tooling materials science| Zusammenfassung: | Fatigue-corrosion destruction of drill string elements in a well that occurs during the drilling of deep wells is one of the problems of the oil and gas industry. At the same time, the reduction of friction forces between the elements of the layout of the bottom of the drill string and the walls of the wellbore, using both downhole screw motors and rotary drilling, is an extremely urgent issue. The presence of significant friction forces prevents the effective axial load from reaching the bottom of the well, which causes a decrease in the mechanical drilling speed, an increase in the duration of drilling, and, consequently, leads to an increase in the cost of drilling oil and gas wells.
The article discusses the possibility of reducing the aforementioned friction forces, and corrosion-fatigue fracture of the elements of the layout of the bottom of the drill string, due to the technology of their polymer coating, as well as its most dangerous areas.
The analysis of scientific works has shown that the limits of application of the polymer coating are expanding extensively. This is due to the advantages of metal structures protected by a polymer coating: low adhesion to different materials, low friction, high resistance to chemical aggression, etc.
During the construction of inclined and horizontal sections of the wellbore, the drill string, under the action of gravity, is pressed against the bottom wall of the well, which makes its rotation difficult, which significantly complicates the removal of sludge, increasing the resistance to the forward rotational direction, which, in turn, prevents optimal axial loading of the chisel. In the end, the performance of the chisels decreases, the quality of the well trajectory control decreases.
The main areas of research consisted in the creation of polymer coating technology for oil assortment pipes, namely in the selection of materials and components for obtaining such a coating, in the development of the technology for applying this coating.
Such a technical and technological complex is able to provide an increase in the speed of construction of oil and gas wells, and, accordingly, reduce its cost to 35%.
The results of industrial studies that can be carried out by drilling companies in Ukraine will be very important, since this technology takes into account the geological conditions of the deposits of the Dnieper-Donets Depression and the Black Sea shelf. |
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