Assessment of Stressed State and Performance Characteristics of Jacketed Spring with a Cut for Drill Shock Absorber

Velichkovich, A. S.; Dalyak, Taras

doi:10.1007/s10556-015-0022-3

Cited by 26 publications

(16 citation statements)

References 3 publications

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“…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). The numerical-analytical (Tikhonov et al, 2014) and experimental (Money et al, 2018) studies touch upon the analysis of the mechanical properties of the centralizers and the interaction of the column-equipped well with the well wall.…”

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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“…One of the promising ways to reduce vibrations is the application of drilling shock absorbers [15]. Authors of [16] developed an improved design of the indicator of fatigue damage, which is installed into the elements of interlocking connections of drill string pipe.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Improving the aluminum drill pipes stability by optimizing the shape of protector thickening

Olesya

Мазуренко

Ropyak

et al. 2017

EEJET

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Розроблено математичну модель і дослі-джено втрату стійкості алюмінієвою буриль-ною трубою із зовнішнім протекторним потов-щенням на середній ділянці під дією крутного моменту та осьової стискаючої сили. За резуль-татами числового аналізу визначено величи-ни критичних навантажень, при яких труба втрачає стійкість в залежності від форми протекторного потовщення. Запропоновано оптимальну обтічну форму протекторно-го потовщення. Розроблено нову конструкцію алюмінієвої бурильної труби з протекторним потовщенням Ключові слова: бурильна труба, протектор-не потовщення, крутний момент, осьова сила, стійкість, деформація Разработана математическая модель и исследована потеря устойчивости алюмини-евой бурильной трубы с внешним протектор-ным утолщением под воздействием крутящего момента и осевой сжимающей силы. На осно-ве результатов численного анализа определены величины критических нагрузок, при которых происходит потеря устойчивости трубы в зави-симости от формы протекторного утолщения. Предложена оптимальная обтекаемая форма протекторного утолщения. Разработана новая конструкция алюминиевой бурильной трубы с протекторным утолщением Ключевые слова: бурильная труба, протек-торное утолщение, крутящий момент, осевая сила, устойчивость, деформация UDC 621.923 : 622.24.058.6

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“…This way, means of the contact mechanics make possible to present the pipeline-soil interaction as a model of layered body under distributed or local loadings. Estimated calculations for the strength and stiffness of layered structures for axially symmetric loads are presented in the papers [24,25], and in the works of the local arbitrarily oriented loading [26,27]. Approaches to the study of contact interaction of a cylindrical shell with an elastic body by simulations and laboratory experiments are given in [28,29].…”

Section: Introductionmentioning

confidence: 99%

Analytical model of oil pipeline overground transitions, laid in mountain areas

Velychkovych

Andrusyak

Pryhorovska

et al. 2019

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

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Abnormal climate changes cause adverse physical and geographical processes (erosion of soils, waterlogging, flooding, etc.) over the world. This situation stipulates study on effect of soil foundation malleability on pipeline transition strength because of its important diagnostic value. The article develops an engineering approach for stress–strain state estimation of oil pipeline overground transitions, laid in mountainous areas. A mathematical statement was made and analytical solutions of the boundary-value problem were described, which take into account overland transition contact with soil foundation. In order to carry out the force analysis, a tubular rod simulated the oil pipeline contacting with the soil foundation on the adjacent to the overground transition section according to the Fuss-Winkler hypothesis. The overground transition was schematised with a thin-walled shell at the final stage of the assessment of strength. The maximum axial stresses were determined for overground transition operation, considering transition’s two-dimensional thermoelastic state. The final assessment of the strength was carried out according to the energy criterion. The proposed method for the overground transition simulation makes possible considering the soil foundation property effects on the behavior of the oil pipeline transition and presents the results in the form of concise analytical expressions convenient for engineering practice. The conducted researches showed the effect of significant redistribution of loading in the oil pipeline overground transition caused by changes of soil foundation stiffness. Also, the boundary effect of perturbation of the stressed state in adjacent underground sections was found. It was determined the zone sizes the boundary effect has significant manifestations. The boundary state of the pipeline is most often achieved in its lower fibers at a short distance from the edge of the underground section. The obtained results of researches were tested on real constructions of overground transitions of oil pipeline laid in mountainous areas.

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Assessment of Stressed State and Performance Characteristics of Jacketed Spring with a Cut for Drill Shock Absorber

Cited by 26 publications

References 3 publications

Analytical models of contact interaction of casing centralizers with well wall

Analytical models of contact interaction of casing centralizers with well wall

Improving the aluminum drill pipes stability by optimizing the shape of protector thickening

Analytical model of oil pipeline overground transitions, laid in mountain areas

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