Friction reduction measurement for a coiled tubing working in a marine riser

Chen, Ying‐Chun; Zhang, Shimin; Yu, Donghe; Wang, Wenming; Xiong, Minghao

doi:10.1016/j.measurement.2015.01.008

Cited by 13 publications

(2 citation statements)

References 26 publications

(20 reference statements)

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“…Falser et al 15 also proceeded experimental and numerical analysis on how the tilt angle would influence CT's axial force transfer behavior and the radial clearance would influence riser's axial pressure, the results showed that tilt angle would affect CT's axial force transfer behavior very few, and radial clearance has nothing to do with riser's axial pressure. By proceeding experimental study on straight pipe-in-pipe system, Chen et al 16,17 found that when injecting force is less than inner pipe's critical helical buckling load, inner pipe's axial load transfer efficiency is basically the same under ''unfixed boundary'' and ''fixed boundary.'' When injecting force is bigger than inner pipe's critical helical buckling load, ''unfixed boundary'' would help decrease inner pipe's axial load transfer efficiency; inner pipe with bigger diameter can help increase its axial load transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

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

Chen

Zhang

Wang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part M:

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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.

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Section: Introductionmentioning

confidence: 99%

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

Chen

Zhang

Wang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…The effects of gravity, torsion, and axial compression on buckling for an oil drill pipe constrained in a horizontal cylinder were experimentally studied by Wicks et al [ 16 ]. Yinchun Chen et al [ 17 ] investigated the axial force transfer when the coiled tubing constrained in a horizontal wellbore. The experimental results indicated that coiled tubing’s axial force transfer efficiency is reduced with the growth of annular clearance.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Boundary Conditions and Friction on the Helical Buckling of Coiled Tubing in an Inclined Wellbore

Gong

Sun

et al. 2016

PLoS ONE

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Analytical buckling models are important for down-hole operations to ensure the structural integrity of the drill string. A literature survey shows that most published analytical buckling models do not address the effects of inclination angle, boundary conditions or friction. The objective of this paper is to study the effects of boundary conditions, friction and angular inclination on the helical buckling of coiled tubing in an inclined wellbore. In this paper, a new theoretical model is established to describe the buckling behavior of coiled tubing. The buckling equations are derived by applying the principles of virtual work and minimum potential energy. The proper solution for the post-buckling configuration is determined based on geometric and natural boundary conditions. The effects of angular inclination and boundary conditions on the helical buckling of coiled tubing are considered. Many significant conclusions are obtained from this study. When the dimensionless length of the coiled tubing is greater than 40, the effects of the boundary conditions can be ignored. The critical load required for helical buckling increases as the angle of inclination and the friction coefficient increase. The post-buckling behavior of coiled tubing in different configurations and for different axial loads is determined using the proposed analytical method. Practical examples are provided that illustrate the influence of the angular inclination on the axial force. The rate of change of the axial force decreases with increasing angular inclination. Moreover, the total axial friction also decreases with an increasing inclination angle. These results will help researchers to better understand helical buckling in coiled tubing. Using this knowledge, measures can be taken to prevent buckling in coiled tubing during down-hole operations.

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A review on dynamic characteristics of blade–casing rubbing

Yin

Guo

et al. 2015

Nonlinear Dyn

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Friction reduction measurement for a coiled tubing working in a marine riser

Cited by 13 publications

References 26 publications

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

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

The Effects of Boundary Conditions and Friction on the Helical Buckling of Coiled Tubing in an Inclined Wellbore

A review on dynamic characteristics of blade–casing rubbing

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