Specific features of drilling mode with extendable working elements

Ratov, Boranbay; Fedorov, B. V.; Sudakov, Andrii; Taibergenova, Indira; Kozbakarova, Saltanat

doi:10.1051/e3sconf/202123001013

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…The above features undoubtedly influenced the determination of the height h depending on (1). The authors [21,22] solved the problem for these features of the shape of the PDC incisor (a circle, and the pressed part of the circle into the rock is a segment), and its placement in space is the negative front angle of the incisor face (Fig. 4).…”

Section: Fig 2 Ec Pdc Drill Bit -2207: a -General View; B -Bottom Vie...mentioning

confidence: 99%

Improvement of the methodology for calculating the expected drilling speed with PDC chisels

Ratov,

Sudakov,

Fedorov

et al. 2024

Nauk. visn. nat. hirn. univ.

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Purpose. Determination of the dependence of the depth of penetration of the PDC cutter into the bottom hole rock, taking into account its geometric parameters and spatial placement in relation to the destroyed array. Methodology. The tasks were solved by a comprehensive research method, including analysis and generalization of literary and patent sources, conducting theoretical research, which consists in solving the theoretical problem of the impact of a superhard circular cutter on an elastically fragile mountain range, using computer and mathematical modeling methods. Findings. A simplified expression has been obtained that allows taking into account the features of the PDC cutter with sufficient accuracy for engineering calculations when determining the depth of its penetration into the bottom hole rock. A method is proposed for calculating the depth of fracture in one revolution of a diamond carbide cutter PDC into the rock of the bottom of the well. The patterns of destruction by the proposed diamond-hard-alloy PDC chisel of a rock mass at the bottom of the well from the parameters of the drilling regime and the hardness of the drilled rocks have been established. Originality. For the first time, the dependence has been obtained of the influence of the geometric parameters of the shape of a single diamond-carbide PDC cutter and its spatial placement in the body of the bit matrix on the magnitude of the technological parameters of drilling a well, and their effect on the nature of the destruction of the array PDC cutter. Practical value. A technique for determining the depth of penetration of a single PDC cutter is proposed, the use of which will allow predicting the mechanical speed, depending on the geological and technical conditions of drilling wells. And taking into account the abrasive properties of rocks, it is possible to reduce the wear of the bits, and therefore the amount of necessary rock-crushing tools for the entire volume of drilling operations during the construction of the well.

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Section: Fig 2 Ec Pdc Drill Bit -2207: a -General View; B -Bottom Vie...mentioning

confidence: 99%

Improvement of the methodology for calculating the expected drilling speed with PDC chisels

Ratov,

Sudakov,

Fedorov

et al. 2024

Nauk. visn. nat. hirn. univ.

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Study of Durability in the Connection “Cone-Tungsten Carbide Insert” for Tension Dependence

Slipchuk,

Jakym,

Bembenek

2023

UJMEMS

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During and after the technological operation of pressing these factors significantly determine the residual stress states of tungsten carbide inserts, as well as in the areas near the holes of the cones’ crowns of the cone. The stressed state of the inserts and the magnitude of the stress concentration determine their fatigue strength of them and the durability of the inserted carbide rock-blasting equipment of the cones in the area where the inserts the cone. Dimensional analysis was done for the inserts and holes in the cones of bit and it was established that size errors of component links of dimensional chains are distributed according to laws that are similar to the normal law of distribution of random variables. The test was carried out according to the criteria of Pearson and Kolmogorov. The influence of various random and systematic factors results to the dispersion of dimensions on the dimensional processing of conjugated surfaces. The amount of tension is a function of the dimensions for mating surfaces during assembly operations. Dispersion of dimensions for the component links of the dimensional chain of a press connection causes the formation of a practical field of dispersion of the closing link. Accuracy control for the closing link in the dimensional chain is impossible if there are no direct measurements of the constituent links. A mathematical model of the process of assembling "cone-tungsten carbide insert" joints was created. For this, the methods of mathematical statistics were applied in the study. It was established that the tension values have a greater influence on the force of pressing inserts into the holes of drill steels 14 NiCrMo1, when its hardness value is HRC 59-60 compared to HRC 48-50. This dependence has a linear character within the limits of the studied tension values. The established relationships make it possible to reasonably and most accurately form selective groups of inserts and mark holes for them. This method significantly reduces losses in the production of drilling tools.

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Specific features of drilling mode with extendable working elements

Cited by 2 publications

References 15 publications

Improvement of the methodology for calculating the expected drilling speed with PDC chisels

Improvement of the methodology for calculating the expected drilling speed with PDC chisels

Study of Durability in the Connection “Cone-Tungsten Carbide Insert” for Tension Dependence

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