Науковий вісник НГУ

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

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Category: Content №1 2024

Last Updated on 29 February 2024

Published on 30 November -0001

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Authors:

B.T.Ratov*, orcid.org/0000-0003-4707-3322, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.K.Sudakov, orcid.org/0000-0003-2881-2855, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

B.V.Fedorov, orcid.org/0000-0002-1196-5268, Satbayev University, Almaty, the Republic of Kazakhstan

I.A.Ruslyakova-Kupriyanova, orcid.org/0000-0002-0709-5175, Almaty Heavy Machine Building Plant CJSC, Almaty, the Republic of Kazakhstan

P.S.Sundetova, orcid.org/0009-0005-3253-7317, Caspian State University of Technology and Engineering named after Sh. Yessenov, Aktau, the Republic of Kazakhstan

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (1): 026 - 031

https://doi.org/10.33271/nvngu/2024-1/026

Abstract:

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.

Keywords: chisel, cutter, PDC, downhole, borehole

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