Axial force transfer characteristics of a coiled tubing conducting offshore rotary operation

2021 ◽  
Vol 242 ◽  
pp. 110112
Author(s):  
Yingchun Chen ◽  
Yanfeng Li ◽  
Jungang Chuan
Keyword(s):  
Axial Force ◽  
Transfer Characteristics ◽  
Coiled Tubing ◽  
Force Transfer

The Buckling Behavior of Pipes and Its Influence on the Axial Force Transfer in Directional Wells

2000 ◽  
Vol 122 (3) ◽  
pp. 129-135 ◽  
Author(s):  
Ergun Kuru ◽  
Alexander Martinez ◽  
Stefan Miska ◽  
Weiyong Qiu
Keyword(s):  
Internal Pressure ◽  
Axial Force ◽  
Current Theory ◽  
Pipe Diameter ◽  
Computer Simulator ◽  
Buckling Behavior ◽  
Force Transfer ◽  
Post Buckling ◽  
Support Conditions ◽  
The University

An experimental setup was built at the University of Tulsa to study buckling and post-buckling behavior of pipes constrained in straight horizontal and curved wellbores. Experiments were conducted to investigate the axial force transfer with and without static internal pressure. Different stages of buckling phenomena and their relation to the axial force, the pipe diameter (1/4 and 3/8 in.) and the pipe end-support conditions have also been investigated. Experimental results have shown that the buckling load is a strong function of the pipe diameter and the pipe end-support conditions. Static internal pressure appears to have insignificant influence on the buckling behavior of pipes. A brief review of recently developed mathematical models to predict buckling behavior of pipes in inclined, curved, and horizontal sections of wellbore is also presented. Applications of the current theory are presented by using recently developed computer simulator. Results of the theoretical analysis have confirmed the versatility and effectiveness of computer simulator for better understanding and solving buckling related problems in the field. [S0195-0738(00)00903-1]

Axial Load Transfer Characteristics of SCR Pipe-in-Pipe Vibration System With Different Diameter Ratio

2016 ◽  
Author(s):  
Wenming Wang ◽  
Yingchun Chen ◽  
Haoran Li ◽  
Minghao Xiong
Keyword(s):  
Axial Load ◽  
Load Transfer ◽  
Ocean Waves ◽  
Diameter Ratio ◽  
Vibration System ◽  
External Excitation ◽  
Gas Drilling ◽  
Transfer Characteristics ◽  
Coiled Tubing ◽  
Pipe Vibration

Coiled tubing technology can shorten the operating time of offshore oil and gas drilling or repair well, but due to the small stiffness of the coiled tubing, it is easy to cause the buckling in the process of entering the Steel Catenary Riser (SCR). So the research of its axial load transfer characteristics in riser is necessary. In this paper, the external excitation loads of current and ocean waves are analyzed. By building an indoor experiment platform with similarity theory, the influence of axial load transfer characteristics with the same external excitation is studied on different diameter ratio of SCR pipe-in-pipe vibration system. Through the above research, we can reduce the accidents of the riser and coiled tubing, and provide theoretical support and guarantee to the actual operation.

Experimental Study on the Mechanics of a Coiled Tubing Working Within a Marine Riser Under the Affection of Marine Loads

2019 ◽  
Author(s):  
Yingchun Chen ◽  
Chang Wang ◽  
Xinhua Wang ◽  
Wenming Wang ◽  
Wenda Wang
Keyword(s):  
Axial Force ◽  
Oil And Gas ◽  
Excitation Frequency ◽  
Experimental System ◽  
Transfer Efficiency ◽  
Force Transmission ◽  
Marine Riser ◽  
External Excitation ◽  
Pipe System ◽  
Coiled Tubing

Abstract Due to its unique advantages, coiled tubing is now widely used in marine oil and gas exploitation operations, while the mechanical behavior of coiled tubing working within a marine riser affected by marine loads is still unknown. By building an indoor simulation experimental system, the mechanics of this pipe-in-pipe system was studied, and the effect of the lateral excitation on the axial force transmission of inner pipe was clarified. It was found that, when the external excitation frequency was within the first natural frequency range of the outer pipe, the external excitation would increase the axial load transfer efficiency of the inner pipe, and the axial force transfer efficiency of the inner tube would reach the maximum when the resonance of out pipe occurred. The results can be helpful on the understanding of mechanics of a coiled tubing working within a marine riser.

Experimental study on axial load transfer behavior of a coiled tubing stuck in a steel catenary riser: At the stage of the coiled tubing un-helical buckled

2016 ◽  
Vol 231 (2) ◽  
pp. 355-363 ◽  
Author(s):  
Yingchun Chen ◽  
Shimin Zhang ◽  
Wenming Wang ◽  
Minghao Xiong ◽  
Hang Zhang
Keyword(s):  
Experimental Study ◽  
Axial Load ◽  
Load Transfer ◽  
Transfer Efficiency ◽  
Steel Catenary Riser ◽  
Coiled Tubing ◽  
Force Transfer ◽  
Safety And Reliability ◽  
Transfer Behavior ◽  
Outer Pipe

Coiled tubing can be used for steel catenary riser pigging operations to remove wax and other debris attached on the interior of steel catenary riser to recover production and ensure safety. Due to its low rigidity, coiled tubing would deform which might finally damage coiled tubing and steel catenary riser. Thus, in order to ensure safety and reliability of the operation, this article proceeded experimental study on the axial load transfer behavior of a coiled tubing stuck in a steel catenary riser when the coiled tubing has not yet helical buckled. According to the experimental results, the inner pipe’s axial force transfer efficiency is always less than 1; the outer pipe of “unfixed steel catenary riser boundary” would elongate forced by the inner pipe within it, which makes the injected displacement of inner pipe within outer pipe of “unfixed steel catenary riser boundary” bigger than the injected displacement of inner pipe within outer pipe of “fixed steel catenary riser boundary” system at the same force-out; before the inner pipe helical buckles, inner pipe’s force transfer efficiency for unfixed and fixed system can be considered as the same. The research done above might provide important theoretical supports for the steel catenary riser pigging operation.

The Mechanical Analysis of the Coiled Tubing

2013 ◽  
Vol 385-386 ◽  
pp. 154-158
Author(s):  
Ju Bao Liu ◽  
Chun Sheng He ◽  
Qian Bei Yue
Keyword(s):  
Axial Force ◽  
Mechanical Analysis ◽  
Actual State ◽  
Contact State ◽  
Coiled Tubing ◽  
Mechanical Models

With respect to the conventional coupling thread, the coiled tubing had the advantages of without screwing on and screwing off in the lifting pipe string. It was widespread used in the drilling and repairing well. According to the actual state of the coiled tubing, the mechanical models on the ground and in the wellbore were established in this article. The were able to simulate the contact state of the coiled tubing through the drum, the guide frame, the injector head and in the wellbore. The curves of the axial force that through the rollers, guide frame, injection head and wellhead was obtained with the changes of the depth.

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