Extending the Reach of a Rod Injected Into a Cylinder Through Distributed Vibration

Miller, J.T.; Mulcahy, Connor; Pabon, Jahir; Wicks, Nathan; Reis, Pedro

doi:10.1115/1.4029251

Cited by 10 publications

(11 citation statements)

References 28 publications

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“…One avenue to achieve this extended reach is to optimize the control parameters of the system, including increasing the pipe diameter [21] or reducing friction between the coiled tubing and wellbore using lubricants [22]. Mechanical methods have also been considered, including tractors [23] or vibration of the coiled tubing [24,25]. An alternative strategy is to use axial rotation, which has been proposed in field scale studies as a mechanism to reduce axial forces induced by friction during coiled tubing operations [24,26].…”

Section: Introductionmentioning

confidence: 99%

Extending the Reach of a Rod Injected Into a Cylinder Through Axial Rotation

Mulcahy

Wicks

et al. 2016

Journal of Applied Mechanics

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We investigate continuous axial rotation as a mechanism for extending the reach of an elastic rod injected into a horizontal cylindrical constraint, prior to the onset of helical buckling. Our approach focuses on the development of precision desktop experiments to allow for a systematic investigation of three parameters that affect helical buckling: rod rotation speed, rod injection speed, and cylindrical constraint diameter. Within the parameter region explored, we found that the presence of axial rotation increases horizontal reach by as much as a factor of 5, when compared to the nonrotating case. In addition, we develop an experimentally validated theory that takes into account anisotropic friction and torsional effects. Our theoretical predictions are found to be in good agreement with experiments, and our results demonstrate the benefits of using axial rotation for extending reach of a rod injected into a constraining pipe.

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Section: Introductionmentioning

confidence: 99%

Extending the Reach of a Rod Injected Into a Cylinder Through Axial Rotation

Mulcahy

Wicks

et al. 2016

Journal of Applied Mechanics

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“…The buckling of a piece of paper hitting an obstacle when ejected from a printer, the insertion of a catheter in to an artery [6] or of steel piping in to a wellbore [15,20,14,16], even the so-called 'inverse spaghetti problem' [7,13,8] are all examples of mechanical settings where an elastic rod is forced out of a constraint and pushed against an obstacle. During this process the length of the rod subject to deformation changes, and when the rod is injected 1 through a sliding sleeve, a configurational or Eshelby-like force 2 is generated, that until now has been ignored in the above-mentioned problems [18,17].…”

Section: Introductionmentioning

confidence: 99%

Development of configurational forces during the injection of an elastic rod

Bosi

Misseroni

Corso

et al. 2015

Extreme Mechanics Letters

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When an inextensible elastic rod is 'injected' through a sliding sleeve against a fixed constraint, configurational forces are developed, deeply influencing the mechanical response. This effect, which is a consequence of the change in length of the portion of the rod included between the sliding sleeve and the fixed constraint, is theoretically demonstrated (via integration of the elastica) and experimentally validated on a proof-of-concept structure (displaying an interesting force reversal in the load/deflection diagram), to provide conclusive evidence to mechanical phenomena relevant in several technologies, including guide wire for artery catheterization, or wellbore insertion of a steel pipe.

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“…1(e) and 1(f)), we have performed precision model experiments (at the meter scale) [12][13][14] to study the buckling and subsequent lock-up of coiled-tubing during injection into horizontal wellbores (at the kilometer scale), as well as identify methods for extending reach [13]. As part of this study, we performed a formal scaling analysis of the dimensionless governing equations for a thin elastic rod inside a cylindrical constraint to identify the primary parameters and predictively extrapolate the mechanics learned from the scaled experiment to the field scale.…”

Section: Introductionmentioning

confidence: 99%

A Perspective on the Revival of Structural (In)Stability With Novel Opportunities for Function: From Buckliphobia to Buckliphilia

Reis

2015

Journal of Applied Mechanics

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158

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Buckling of slender structures is traditionally regarded as a first route toward failure. Here, we provide an alternative perspective on a burgeoning movement where mechanical instabilities are exploited to devise new classes of functional mechanisms that make use of the geometrically nonlinear behavior of their postbuckling regimes. Selected examples are highlighted across length-scales to illustrate some of the exciting opportunities that lie ahead. [DOI: 10.1115/1.4031456] IntroductionSlender structural elements (e.g., rods, plates and shells) under compression are ubiquitously subjected to mechanical instabilities. In 1744, Euler [1] laid the foundation for the formal analysis of structural stability; a field that has matured to become paramount in engineering design and one of the pillars in the history of mechanics [2]. A modern and detailed perspective on the stability of structures is found in the seminal book by Ba zant and Cedolin [3]. Across length-scales, buckling has traditionally been regarded as a first route toward failure and can lead to catastrophic collapse [4]; an approach that can be succinctly referred to as Buckliphobia. By contrast, Buckliphilia is a more recent and burgeoning trend that is changing the above paradigm. Mechanical instabilities of slender structures are therefore envisioned as opportunities for novel modes of functionality that are to be predictively understood in order to then be exploited.In these efforts of adopting Buckliphilia, there is a need to rationalize the complex configurations that arise in the postbuckling regime, far-from-threshold. The large displacements and rotations permissible by slender structures can yield nontrivial and nonnegligible geometric nonlinearities, even if their material properties remain linear. Furthermore, this strong rooting of the postbuckling behavior on geometry results in general and universal modes of deformation; albeit with threshold or onsets that are scale-or material-dependent. To avoid overstatement, it is important to note that viscoelasticity, plasticity, fracture, and other phenomena can introduce additional time-and length-scales that may compromise the geometric universality of the buckling modes. In many problems involving the large deformation of thin structures, however, the strains at the material level are small enough, such that these effects are secondary and a linear elastic constitutive description suffices.Qualifying a structure as slender is a statement on aspect ratio rather than length-scale, which added to the fact that elasticity is a scale-free theory, ensures that functional mechanisms based on the instability of slender structures can be instantiated over a wide range of length-scales. In Fig. 1, we represent three representative examples that illustrate this scale invariance. First, the crumpling of paper [5] (Fig. 1(a)) has been regarded by the nonlinear physics community as a canonical problem, at the centimeter scale, for Precision desktop experiment to study the buckling of a thin rod injected int...

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Extending the Reach of a Rod Injected Into a Cylinder Through Distributed Vibration

Cited by 10 publications

References 28 publications

Extending the Reach of a Rod Injected Into a Cylinder Through Axial Rotation

Extending the Reach of a Rod Injected Into a Cylinder Through Axial Rotation

Development of configurational forces during the injection of an elastic rod

A Perspective on the Revival of Structural (In)Stability With Novel Opportunities for Function: From Buckliphobia to Buckliphilia

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