E3S Web Conf.
Volume 198, 20202020 10th Chinese Geosynthetics Conference & International Symposium on Civil Engineering and Geosynthetics (ISCEG 2020)
|Number of page(s)||4|
|Section||Exploration and Innovation of Construction Engineering Technology|
|Published online||26 October 2020|
Analysis of Puncture and Prediction of Crack Fatigue in Drilling Tools
1 Petroleum Engineering Technology Research Institute, Sinopec Northwest Oilfield Company, 830011, Urumqi, China
2 Key Laboratory of Enhanced Recovery for Fracture-Cave Oil Reservoir, Sinopec 830011, Urumqi, China
3 Petroleum Engineering College, Yangtze University, 430100, Wuhan, Hubei, China
* Corresponding author: firstname.lastname@example.org
In recent years, the drilling technology of directional wells and large displacement wells has been widely used, which has greatly improved the reservoir development efficiency. However, the “stabbing” accidents in the drilling of the inclined section drilled frequently occur frequently. In view of the above problems, this paper uses the finite element method to take the well “003-H1”, which is more serious in the drilling tool, as the research object, and deeply analyzes the cause of the “stabbing” of the drilling tool and the prediction of the crack extension period. The results show that the “piercing” of the drill pipe is mainly caused by the fatigue failure of the drill pipe. The crack on the surface of the drill pipe increases with the slope of the construction. The crack changes rapidly from elastic expansion to plastic expansion, and the fatigue life is “breaking” down, move down to create a slanting point position, which can reduce the occurrence of drill pipe “stabbing” accident.
© The Authors, published by EDP Sciences 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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