The Influence of Technological Factors on the Reliability Connection for Tungsten Carbide Insert Cutter with Cone in the Roller Cone Bits

Slipchuk, Andrii; Jakym, Roman; Lebedev, V. K.; Kurkchi, E. U.

doi:10.1007/978-3-030-68014-5_44

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…The present paper is based on the latest investigations dedicated to developing the cutters of the threecone drill bits and continues the previous research of the authors presented in [19] and [20]. The latter studied the influence of various technological factors of the drilling process and geometrical parameters of the roller cone bit on the tool reliability and molding accuracy.…”

Section: Introductionmentioning

confidence: 72%

“…According to [19,20], the calculations showed us the maximal value of the contact pressure equal to 2317 MPa, whilst under the conditions of the minimal tension of min 0.063 mm N = , this pressure equals 1040.5 MPa. As an example, the computer simulation of the stresses character in the 215.9СЗ-ПВ drill bit cutter has been carried out (see figure 6).…”

Section: Resultsmentioning

confidence: 99%

“…In particular, the high strength of the cutter steel and the too close location of the tipped teeth cause the more intensive formation of cracks. In the cases of non-optimal strength parameters, for example, those assessed according to the DI criterion, the disastrous destruction of the cutters takes place due to the formation of cracks in the standard structures of the cutters with the carbide (hard-alloyed) tipped teeth [19,20].…”

Section: Resultsmentioning

confidence: 99%

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Design and technological aspects of functionally oriented technology of manufacturing the three-cone drill bits

Slipchuk

Jakym

Korendiy

et al. 2023

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

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The quality and efficiency of the drilling process significantly depend on the design parameters and operational peculiarities of the drill bit cutter. The present paper is focused on developing the functionally oriented technology of manufacturing the three-cone drill bits. The research methodology involves the theoretical and experimental studies dedicated to analysing the main reasons for the loss of the cutters working capacity, and the technological factors that affect the strength and durability of the “tooth – cutter” press connection. The major scientific novelty consists in defining the relationships between the design parameters of the cutters, their kinematics, dynamics, and operational conditions. It has been established that the destruction of the rock by the three-cone drill bits is carried out by applying successive impacts of the tipped hard-alloyed teeth upon the rock. The rolling of the cutters (bits) along a face (stope) exerts a dynamic effect due to the alternate change of the contact of the teeth with the rock, and the axial load on the bit ensures that the striking part of the teeth is pressed into the rock. The character of wear and destruction of the tipped teeth also has an important influence. During the drilling process, the rock-destructing parts (teeth), as well as the working areas of the cutters, undergo intensive wear and failure. This leads to a significant decrease in the quality of the rock destruction process and a reduction in the drilling efficiency. The obtained results have a significant practical value and can be effectively used by designers, technologists and researchers while implementing the energy-efficient drilling technologies.

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Section: Introductionmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Design and technological aspects of functionally oriented technology of manufacturing the three-cone drill bits

Slipchuk

Jakym

Korendiy

et al. 2023

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

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“…Крім того, роботу шарошкового долота слід контролювати в складних експлуатаційних ситуаціях, адже є більше можливостей реґулювання крутного моменту та навантаження на долото. Більшість провідних фірмвиробників шарошкових доліт використовують для виготовлення лап крицю AISI 4815H (аналог -криця 15НЗМА) або AISI 8720 (аналог -криця 19НМА); для виготовлення фрезерованих шарошок -крицю AISI4815H, а для штирових шарошок -крицю AISI 9315H (аналог -криця 14ХНЗМА) [18]. Для виготовлення тіл кочення застосовується криця AISI S2 (аналог -55СМ5ФА).…”

Section: вступunclassified

Multifactor Empirical Models of Energy of Low-Frequency and Toothed Oscillations of the Dynamic Component of Torque on the Bit

Moysyshyn,

Ivasyutyn,

Borysevych

et al. 2024

Metallofiz. Noveishie Tekhnol.

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торами під час проведення планованого експерименту були тип і діяметер тришарошкового долота та витрата промивальної рідини (води). Планований факторний експеримент було проведено в блоках пісковику Городищенської світи твердістю у 1440 МПа. За результатами експерименту побудовано рівняння багатофакторних емпіричних моделів енергії EНЧК і EЗК коливань динамічного складника обертового моменту на долоті та проведено аналізу впливу на цю енергію зовнішніх незалежних чинників.Ключові слова: сталеве долото, емпіричний модель, енергія випадкового процесу, спектральна густина, енергія низькочастотних коливань динамічного складника обертового моменту на долоті, енергія зубцевих коливань динамічного складника обертового моменту на долоті, змінний чинник.In order to establish multifactorial empirical energy models of low-frequency (EНЧК) and toothed (EЗК) oscillations of the dynamic component of the torque on the bit, experimental studies are conducted at the stand of the Ivano-Frankivsk National State University of Oil and Gas, using the method of rational planning of experiments. According to this method, the combination of variable factors, which include the axial static load Fст, bit rotation frequency n, stiffness C, and damping coefficient β of the drilling tool, occurs only once. The studied parameter is the amplitude value of the dispersion (energy) at local maxima, which are fixed on the low-frequency and jagged fluctuations of the spectral density (energy spectrum) of the internal structure of the dynamic component. General multidimensional functions are represented by the product of individual dependences on variable factors:where Bср is the average value of the numerical coefficient for the set of all experiments. Constant factors during the planned experiment are both the type and the diameter of the three-layer bit and the consumption of flushing fluid (water). The planned factorial experiment is carried out in blocks of sandstone of the Horodyshche strata with a stamp hardness of 1440 MPa. According to the results of the experiment, the equations of multifactor empirical models of energy EНЧК and EЗК fluctuations of the dynamic component of the torque on the bit are constructed, and the influence of external independent factors on this energy is analysed.

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The influence of technological factors on the reliability connection for tungsten carbide inset cutter of roller cone bits

Slipchuk¹,

Jakym²

2021

Avtom. virob. procesìv. mašinobuduv. priladobuduv

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Aim. Analysis of used bits revealed the effect when the tungsten carbide insert cutter was scrolling around its axis. Therefore, the task was to study the causes of this phenomenon. Hardness was measured followed by setting the hardness distribution gradient in the section of the hole, in order to evaluate the strength parameters of steel in the zone of the hole. Method. Applying a well-tested method, namely the method of successive approximations, we determined the estimate of the standard deviation and the evaluation criterion. Sample averages were checked for homogeneity. For this, we evaluated the character and magnitude of the difference between adjacent sample means. In conducting such an analysis, Student's t test was applied. Results. The obtained data allow us to establish a fact, that the cutting speed within the studied limits does not significantly affect the breakdown’s size of the holes when unfolding the holes in the body of the cones for fitting tungsten carbide inset cutters. The impact of technological parameters on the statistical association between the magnitude of the hole deployment and roughness for the processing surfaces was also studied. Scientific novelty. The analysis showed that the planes of sliding are formed along the neutral lines of tension - compression in the section of the working wedge surface of the tungsten carbide inset cutter. Under adverse conditions, the distribution of stresses in the conjugation "inset cutter - hole" is the sudden emergence of the spread of trunk cracks. This leads to the sudden destruction hard alloy of the inset cutter. Therefore, the accuracy of the connection is crucial. Practical significance. The ovality of the holes must be reduced to 0.02 mm, If you increase the tolerance around the hole, then there is an unfavorable voltage distribution. This leads to the destruction of the conjugate elements of the inset cutter and the hole of the rolling-cutter row. It is necessary to take into account the character of the stress distribution in the closely spaced not only two inset cutters, but groups of inset cutters in the rolling-cutter row.

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The Influence of Technological Factors on the Reliability Connection for Tungsten Carbide Insert Cutter with Cone in the Roller Cone Bits

Cited by 3 publications

References 9 publications

Design and technological aspects of functionally oriented technology of manufacturing the three-cone drill bits

Design and technological aspects of functionally oriented technology of manufacturing the three-cone drill bits

Multifactor Empirical Models of Energy of Low-Frequency and Toothed Oscillations of the Dynamic Component of Torque on the Bit

The influence of technological factors on the reliability connection for tungsten carbide inset cutter of roller cone bits

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