In down-hole interventions, the thin elastic coiled tubing (CT) extended for thousands of meters underground would typically undergo helical buckling as a result of axial compressive force. This paper builds an analytical model to describe the unbuckling behavior of a helically buckled CT with a new view to the stretching process in the plug milling operations. The new dynamic unbuckling equation is built on the basis of the general bending and twisting theory of rods. Under the continuous contact assumption, the helical angle is only subject to time; thus, the dynamic equations can be simplified and the analytical solutions can be obtained. By using the new governing equations, the angular velocity, axial force, and contact force relative to CT are analyzed in the unbuckling process. The calculation results indicate that the parameters including CT diameters and wellbore diameters have a strong influence on the variation of axial force and wellbore contact force. Moreover, the wellbore contact force is greater than zero during the whole unbuckling process which confirms the continuous contact assumption. These new results provide important guidance for accurate job design for the plug milling operations during the well completion stage.
Skip Nav Destination
Article navigation
September 2018
Research-Article
Dynamic Analysis on Unbuckling Process of Helically Buckled Coiled Tubing While Milling Plugs
Xing Qin,
Xing Qin
MOE Key Laboratory of Petroleum Engineering
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: qin99xing@163.com
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: qin99xing@163.com
Search for other works by this author on:
Deli Gao,
Deli Gao
Professor
MOE Key Laboratory of Petroleum Engineering,
State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: gaodeli@cup.edu.cn
MOE Key Laboratory of Petroleum Engineering,
State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: gaodeli@cup.edu.cn
Search for other works by this author on:
Yongsheng Liu
Yongsheng Liu
MOE Key Laboratory of Petroleum Engineering
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: bfyongsheng@126.com
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: bfyongsheng@126.com
Search for other works by this author on:
Xing Qin
MOE Key Laboratory of Petroleum Engineering
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: qin99xing@163.com
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: qin99xing@163.com
Deli Gao
Professor
MOE Key Laboratory of Petroleum Engineering,
State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: gaodeli@cup.edu.cn
MOE Key Laboratory of Petroleum Engineering,
State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: gaodeli@cup.edu.cn
Yongsheng Liu
MOE Key Laboratory of Petroleum Engineering
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: bfyongsheng@126.com
and State Key Laboratory of Petroleum Resources
and Engineering,
China University of Petroleum-Beijing,
Beijing 102249, China
e-mail: bfyongsheng@126.com
Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received January 13, 2017; final manuscript received April 2, 2018; published online April 19, 2018. Assoc. Editor: Ray (Zhenhua) Rui.
J. Energy Resour. Technol. Sep 2018, 140(9): 092902 (10 pages)
Published Online: April 19, 2018
Article history
Received:
January 13, 2017
Revised:
April 2, 2018
Citation
Qin, X., Gao, D., and Liu, Y. (April 19, 2018). "Dynamic Analysis on Unbuckling Process of Helically Buckled Coiled Tubing While Milling Plugs." ASME. J. Energy Resour. Technol. September 2018; 140(9): 092902. https://doi.org/10.1115/1.4039871
Download citation file:
Get Email Alerts
Cited By
Fatigue-Life Prediction of the Optimized Savonius Vertical-Axis Wind Turbine Composite Blades
J. Energy Resour. Technol
RETROFITING NATURAL-GAS FIRED BOILER FOR HYDROGEN COMBUSTION: OPERATIONAL PERFORMANCE AND NOX EMISSIONS
J. Energy Resour. Technol
Assessing Hydrogen-Ammonia Ratios to Achieve Rapid Kernel Inception in Spark Ignition Engines
J. Energy Resour. Technol
Artificial Intelligence for thermal energy storage enhancement: A Comprehensive Review
J. Energy Resour. Technol
Related Articles
Application of Real-Time Field Data to Optimize Drilling Hydraulics Using Neural Network Approach
J. Energy Resour. Technol (November,2015)
Lab Testing and Finite Element Method Simulation of Hole Deflector Performance for Radial Jet Drilling
J. Energy Resour. Technol (May,2017)
An Analysis of Common Drill Stem Vibration Models
J. Energy Resour. Technol (January,2018)
Experimental Investigation on Wellbore Strengthening Based on a Hydraulic Fracturing Apparatus
J. Energy Resour. Technol (May,2018)
Related Proceedings Papers
Related Chapters
Optimum Drilling Practices
Oilwell Drilling Engineering
Application of Seismic Sedimentology in Analysis on Channel Sedimentary Facies
International Conference on Advanced Computer Theory and Engineering, 5th (ICACTE 2012)
Introduction
Mechanics of Drillstrings and Marine Risers