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Дата публикации статьи в журнале: 2019/12/09
Название журнала: Восточно Европейский Научный Журнал, Выпуск:
51, Том: 5,
Страницы в выпуске: 40-48
Автор: Mykhailiuk V.V.
, Ivano-Frankivsk National Technical University of Oil and Gas, PhD (in engineering)
, Ivano-Frankivsk National Technical University of Oil and Gas, PhD (in engineering)
Анотация: The need to design new and improve existing drilling equipment is one of the important conditions for ensuring the efficiency of well construction. During drilling operations, the elements of the drill string, including their tool joints, are exposed to the highest load. Double-shoulder tool joints that have several advantages over standard (single-shoulder) ones, are becoming widespread in the world.
However, such joints require a secure contact and a specified load along three surfaces (the threaded surface, main and auxiliary end faces) simultaneously, which must be secured by a tight tolerance of the distance between the main and auxiliary end faces and the ends of the pin and the tool joint box. Failure to follow stringent requirements can lead to accelerated fatigue failure of the thread and, consequently, to drill string failures. Therefore, it is necessary to design a tool joint that will work effectively throughout the entire period of operation. The analyzed existing options for solving the problem solve it to some extent, but have several disadvantages. To eliminate them, it is proposed to use elastic elements (ring springs) in the construction of double-shoulder tool joints.
The use of such elements makes it possible to create the necessary axial loads on the internal, and as a consequence, on the outer support joints and maintain their ratio throughout the operating lifetime without affecting the stress distribution in the danger areas of the connection, which was confirmed by simulation modeling.
In addition, the use of elastic elements reduces the impact of fabrication precision of the tool joint on its stress-strain state.
Ключевые слова:
drill string
double-shoulder tool joint
elastic elements
drill collars
tension
simulation modeling
Данные для цитирования:
Mykhailiuk V.V. ,
Artym V.I. ,
Faflei O.Y. .
IMPROVEMENT OF THE OPERATIONAL EFFICIENCY OF DOUBLE SHOULDER TOOL JOINT OF DRILL COLLARS (40-48). Восточно Европейский Научный Журнал. Технические науки. 2019/12/09;
51(5):40-48.