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Energies 2018, 11(9), 2414; https://doi.org/10.3390/en11092414

Heat Transfer Behaviors in Horizontal Wells Considering the Effects of Drill Pipe Rotation, and Hydraulic and Mechanical Frictions during Drilling Procedures

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1,2,* , 1,2
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3,* , 1,2
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and
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1
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan 430071, Hubei, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China
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PetroChina Co. Ltd., Chuandong Drilling Company, Chongqing 401147, China
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CNOOC Ltd., Zhanjiang Branch, Zhanjiang 524057, Guangdong, China
*
Authors to whom correspondence should be addressed.
Received: 30 August 2018 / Revised: 7 September 2018 / Accepted: 10 September 2018 / Published: 12 September 2018
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Abstract

Horizontal wells are increasingly being utilized in the exploration and development of oil and gas resources. However, the high temperature that occurs during drilling processes leads to a number of problems, such as the deterioration of drilling fluid properties and borehole instability. Therefore, the insight into heat transfer behaviors in horizontal wells is certainly advantageous. This study presents an integrated numerical model for predicting the temperature distribution during horizontal wells drilling considering the effects of drill pipe rotations, and hydraulic (i.e., circulating pressure losses) and mechanical frictions. A full implicit finite difference method was applied to solve this model. The results revealed that the mechanical frictions affect more on wellbore temperature variation than the effects of heat transfer intensification and circulating pressure losses; Moreover, the drilling fluid temperature was found higher than the stratum temperature at horizontal section, the temperature difference at the bottom hole reached up to 16 °C if pressure drops, heat transfer strengthened by rotations and mechanical frictions were all taken into account. This research could be utilized as a theoretical reference for predicting temperature distributions and estimating risks in horizontal wells drilling. View Full-Text
Keywords: heat transfer; wellbore temperature; drill pipe rotation; friction; horizontal well heat transfer; wellbore temperature; drill pipe rotation; friction; horizontal well
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Chang, X.; Zhou, J.; Guo, Y.; He, S.; Wang, L.; Chen, Y.; Tang, M.; Jian, R. Heat Transfer Behaviors in Horizontal Wells Considering the Effects of Drill Pipe Rotation, and Hydraulic and Mechanical Frictions during Drilling Procedures. Energies 2018, 11, 2414.

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