Combined Deformation Conditions for Fatigue Damage Indicator and Well-Drilling Tool Joint

Shatskyi, Ivan; Lyskanych, O. M.; Kornuta, Volodymyr

doi:10.1007/s11223-016-9786-8

Cited by 34 publications

(18 citation statements)

References 1 publication

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“…General problems of interaction of columns with the borehole were considered, in particular, in the papers (Aleksandrov, 1982;Vlasiy et al, 2017;Levchuk, 2018;Kryzhanivskyi et al, 2018). Various approaches to the engineering simulation of contact phenomena in rod structures using classical theories of rods are proposed in publications (Mossakowskii et al, 1978;Bedzir et al, 1995;Neto et al, 2014;Shats'kyi et al, 2016;Popadyuk et al, 2016;Jawed et al, 2018). Some contact problems for thin shells and their systems are considered in classical statement (Shats'kyi, 2005;Shats'kyi & Makoviichuk, 2005;Shats'kyi & Makoviichuk, 2009;Shatskii & Makoviichuk, 2011;Velichkovich & Dalyak, 2015;Velichkovich et al, 2018).…”

Section: State Of Question and Statement Of Research Problemmentioning

confidence: 99%

Analytical models of contact interaction of casing centralizers with well wall

Shatskyi¹,

Velychkovych²,

Vytvytskyi³

et al. 2019

10.5267/j.esm

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The problem of interaction of rod centralizers of casing with a well wall is considered. The paper aims at studying the ways of fastening of centralizer's ends on the parameters of its rigidity and strength. Knowledge of these characteristics is necessary for the assessment of casing column drift and well completion quality. For simulation of the working links of the centralizers, the classical linear theory of smooth rods, rigid along the axis and elastic on bending is used. Stress-strain state of bow-type rod with six different variants of fastening under conditions of point contact is studied. The analytical relations between the contact force and the mutual approach of the column and the well wall, as well as the expressions for the admissible contact loads, are established. The way of fastening the rod significantly influences these characteristics; in particular, the fact of the presence or absence of freedom of mutual movement of its ends along the pipe is decisive. The engineering formulas, which serve as two-side estimations of the rigidity and strength of the real structures of centering devices, are obtained. A comparative analysis of mechanical properties of centralizers has been conducted.

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Section: State Of Question and Statement Of Research Problemmentioning

confidence: 99%

Analytical models of contact interaction of casing centralizers with well wall

Shatskyi¹,

Velychkovych²,

Vytvytskyi³

et al. 2019

10.5267/j.esm

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show abstract

“…The use of such models is relevant for pipelines in the areas of soil displacement [23], in places where a damaged base is mobile [24], and where active fault is crossed [25,26]. Similar models of contacting bodies are applicable to improve the durability of drill strings [27,28] and to provide quality centering of casing pipes [29].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Analytical estimation of inertial properties of the curved rotating section in a drill string

Grydzhuk

Chudyk

Velychkovych

et al. 2019

EEJET

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exposed to the action of friction and contact forces, the forces of inertia from a washing fluid, etc. The listed phenomena exert a negative impact on the elements of a drill string, bits, downhole motors, and in general lead to a loss of energy and reduce the techno-economic indicators of drilling [1-4]. To refine the parameters of loading and the stressed-deformed state of a drill string, it is necessary to have a well-defined procedure for determining the moments of inertia of its curved sections. Therefore, it is a relevant task for the theory of dynamic stability of elastic systems to investigate the inertial properties of a curvilinear string of pipes at rotation. The solution to this problem is necessary in order to properly conduct a dynamic analysis of drill strings at rotor and rotor-turbine drilling techniques.

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“…Successful design and using of drilling shock absorbers essentially depend from the quality of theoretical and experimental researches of loaded parts. The main concepts of mechanical and mathematical modeling, calculation and experimental researches of shell resilient elements and other layered structures that are based on continuous shells published in the works [20][21][22][23][24]. Theoretical researches slotted shell resilient elements are missing in the literature now.…”

Section: Mathematical Modeling Of Slotted Shell Resilient Elementmentioning

confidence: 99%

Slotted shell resilient elements for drilling shock absorbers

Velichkovich

Dalyak

Petryk

2018

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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The new design of a resilient element for application in drilling devices of vibration protection is presented. A cylindrical shell with a cut along its generatrix is the peculiarity of the proposed design. The presented resilient element has high loaded and damping properties upon cross dimension hard restriction condition. Besides, the design is simple, technological and low cost. The drilling shock absorber is tested, which is manufactured on the base of several slotted shell resilient elements, operating in parallel manner. A calculation method for slotted shell resilient elements for drilling devices vibration protection is given. This work presents results of slotted cylindrical shell study in conditions of contact interaction with a resilient filler. To provide the research, the authors have developed a verified numerical model of the shell resilient element with a slit and used iterative algorithms for contact problem solving, considering contact surface friction. The stress-strain state of the shell resilient element of the drilling shock absorber was analyzed. Strength of the structure is evaluated by the energy criterion. Hysteresis loops were developed and analyzed for some histories of resilient element cyclic loading. The obtained results make possible rather accurately to take into account effect of the shell and the filler material resilient characteristics, their geometrical parameters and tribological properties on operational characteristics of drilling devices for vibration protection. In its turn, this makes possible to use efficient drilling vibration protection devices, develop vibroinsulator shell designs by the criteria of maximum compliance and required damping level.

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Combined Deformation Conditions for Fatigue Damage Indicator and Well-Drilling Tool Joint

Cited by 34 publications

References 1 publication

Analytical models of contact interaction of casing centralizers with well wall

Analytical models of contact interaction of casing centralizers with well wall

Analytical estimation of inertial properties of the curved rotating section in a drill string

Slotted shell resilient elements for drilling shock absorbers

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