Study on grinding mode effect on external conical thread quality

Ropyak, Lіubomyr; Vytvyts’kyi, V. I.; Velychkovych, Andrii; Pryhorovska, Tetiana; Shovkoplias, M V

doi:10.1088/1757-899x/1018/1/012014

Cited by 44 publications

(19 citation statements)

References 36 publications

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“…The functional dependence of the hole volume on the studied factors was represented as a regression equation. To set up the experiment, a complete factor plan of type 2 3 was implemented in three randomized series, which made it possible to independently assess the influence of each f actor [8]. Experimental matrix of 8 experiments is shown in Table 2.…”

Section: Methodsmentioning

confidence: 99%

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Strelchuk

Shelkovyi

Gutsalenko

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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In this paper are presented the results of electrical discharge diamond grinding with with difference polarities for processing various materials and calculates geometric parameters of erosion holes. The purpose of the study is to determine the volume of holes during electrical discharge diamond grinding using the mathematical method of planning experiments. The experimental plans is a combination of statistical theory and mathematical model, which is very useful in the modelling and analysing the technical problems. As a result of experimental studies, a mathematical model of the volume of holes from electrical modes of the process of electrical discharge diamond grinding was built. The mathematical formula of geometric parameters of holes obtained can be used to determine the volume of holes for different electrical quantities of discharge diamond grinding. It is found that the most significant factors that affect the geometric parameters of holes are the voltage of the igniting pulse and the pulse duration. The dependence of electrical parameters on the hybrid grinding process is investigated. There is a certain volume of holes, at which the discharge acts most efficiently, and the process performance is the most optimal. During the operation of the pulse generator, it is preferable to maintain a certain value of geometric parameters of holes, which results in an unhindered release of metal, since the effect of electrical erosion increases.

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Section: Methodsmentioning

confidence: 99%

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Strelchuk

Shelkovyi

Gutsalenko

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The problems of stress concentration in shell systems under conditions of contact interaction while complex loading were considered in [49][50][51]. When designing such equipment, engineers pay special attention to the accuracy and tightness of threaded joints [52][53][54], increasing thread [55][56][57] and preventing self-unscrewing of threaded joints [58,59].…”

Section: State Of the Current Development Of The Problem And Formulating A Research Taskmentioning

confidence: 99%

Strategy of Compatible Use of Jet and Plunger Pump with Chrome Parts in Oil Well

et al. 2021

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During oil fields operation, gas is extracted along with oil. In this article it is suggested to use jet pumps for utilization of the associated oil gas, burning of which causes environmental degradation and poses a potential threat to the human body. In order to determine the possibility of simultaneous application of a sucker-rod pump, which is driven by a rocking machine, and a jet pump (ejector) in the oil well, it is necessary to estimate the distribution of pressure along the borehole from the bottomhole to the mouth for two cases: when the well is operated only be the sucker-rod pump and while additional installation of the oil-gas jet pump above its dynamic level. For this purpose, commonly known methods of Poettman-Carpenter and Baksendel were used. In addition, the equations of high-pressure and low-pressure oil-gas jet pumps were obtained for the case, when the working stream of the jet pump is a gas-oil production mixture and the injected stream is a gas from the annulus of the well. The values which are included in the resulting equations are interrelated and can only be found in a certain sequence. Therefore, a special methodology has been developed for the practical usage of these equations in order to calculate the working parameters of a jet pump based on the given independent working parameters of the oil well. Using this methodology, which was implemented in computer programs, many operating parameters were calculated both for the well and for the jet pump itself (pressures, densities of working, injected and mixed flows, flow velocities and other parameters in control sections). According to the results of calculations, graphs were built that indicate a number of regularities during the oil well operation with such a jet pump. The main result of the performed research is a recommendation list on the choice of the oil-gas jet pump location inside the selected oil well and generalization of the principles for choosing the perfect location of such ejectors for other wells. The novelty of the proposed study lays in a systematic approach to rod pump and our patented ejector pump operation in the oil and chrome plating of pump parts. The result of scientific research is a sound method of determining the rational location of the ejector in the oil well and the calculation of its geometry, which will provide a complete selection of petroleum gas released into the annulus of the oil well. To ensure reliable operation of jet and plunger pumps in oil wells, it is proposed to use reinforcement of parts (bushings, plungers, rods, etc.) by electrochemical chromium plating in a flowing electrolyte. This has significantly increased the wear resistance and corrosion resistance of the operational surfaces of these parts and, accordingly, the service life of the pumps. Such measures will contribute to oil production intensification from wells and improve the environmental condition of oil fields.

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“…The experimental researches of comparative wear resistance of the threaded drillpipe connection Z-117 after their improvement using electromechanical surface hardening are given in [9]. The machining influence on surface roughness obtained during thread grinding is grounded in the article [10]. The machining error influence on the stress state of the conical thread joint is investigated in [11].…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of Working Height of a Thread Profile on Quality Indicators of the Drill-String Tool-Joint

Kopei

Onysko

Panchuk

et al. 2021

Lecture Notes in Mechanical Engineering

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Drilling oil and gas wells is always accompanied by the process of screwing and unscrewing the drill-pipe connector. Its effectiveness largely depends on the accuracy and quality of the thread profile, including the profile height's accuracy. Studies show a decrease in the contact pressures and stresses between the threaded surfaces of the box and the pin of the drill string tool-joint as the working height of the profile increases. It is a positive factor influencing the durability and reliability of the drill pipe connector. On the other hand, the same increase of the working height leads to the improvement of the screwing process itself, which is an integral part of lowering and lifting operations during the operation of drill strings. The increased contact area allows the joint to handle high make-up torques without damaging the thread profile. It is also advisable to consider the design of the roots not of around but of an elliptical profile. To ensure leak-tightness and fatigue strength, the operation of joints with a reduced value of h should be avoided.

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Study on grinding mode effect on external conical thread quality

Cited by 44 publications

References 36 publications

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes

Strategy of Compatible Use of Jet and Plunger Pump with Chrome Parts in Oil Well

Influence of Working Height of a Thread Profile on Quality Indicators of the Drill-String Tool-Joint

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