Kazakhstan journal for oil & gas industryKazakhstan journal for oil & gas industry2707-42262957-806XKMG Engineering10892210.54859/kjogi108922Research ArticleAnalysis of operating speed regimes for transporting drilling equipment on sloped terrainМеdеtоvShokan М.<p>Cand. Sc. (Engineering), Associate Professor</p>medetov.76@mail.ruhttps://orcid.org/0009-0002-0137-228XSalpakayevaRaushan K.r.salpakaeva@aogu.edu.kzhttps://orcid.org/0009-0002-5295-8117AimanovaGulmira R.g.aymanova@aogu.edu.kzhttps://orcid.org/0009-0001-4195-755XDyussenovAslan T.<p>Cand. Sc. (Engineering), Associate Professor</p>A.Duysenov@aogu.edu.kzhttps://orcid.org/0009-0009-5546-8958KuanyshkaliyevaAinur Zh.a.kuanyshkalieva@aogu.edu.kzhttps://orcid.org/0009-0002-7518-8071KarasayevaGulraushan R.g.karasaeva25@aogu.edu.kzhttps://orcid.org/0009-0005-6314-7768Atyrau Oil and Gas University named after Safi UtebaevAtyrau University of Oil and Gas named after Safi Utebayev241220257447582909202527112025Copyright © 2025, Меdеtоv S.М., Salpakayeva R.K., Aimanova G.R., Dyussenov A.T., Kuanyshkaliyeva A.Z., Karasayeva G.R.2025<p><strong>Background: </strong>Transportation of drilling equipment on sloped terrain in ridge-and-fold terrain is associated with increased accident rates and accelerated equipment wear. This is driven by the combined influence of heavy loads, steep slope gradients, and variable friction coefficients between the bearing surfaces (sleds or runners). In most design and operational documents, only the maximum permissible operating speeds are specified, without considering actual traction conditions or variations in the route profile. As a result, the selected speed may be underestimated-reducing transportation efficiency—or overestimated, which increases the risk of skidding, overturning, and braking system failures. For this reason, a scientifically justified assessment of safe speed regimes is required, taking into account the slope angle and the friction coefficient between the bearing surfaces.</p> <p><strong>Aim: </strong>To develop scientifically substantiated recommendations for selecting and optimizing the speed regimes used for transporting drilling equipment on sloped terrain.</p> <p><strong>Materials and methods: </strong>The study examines transportation systems that move drilling equipment on sleds or runners across soil, snow-covered, and icy slopes. The analysis includes a review of regulatory documents and standards governing transportation safety under challenging environmental conditions. To model the motion, the study employs equations derived from the theorem of momentum change, along with differential equations describing the dynamics of movement on an inclined plane. These equations incorporate key parameters such as slope angle and the coefficient of friction between the bearing surfaces. After formulating the differential equations, they are integrated to obtain analytical and numerical solutions that describe the equipment’s trajectory and velocity. The resulting data are then used to determine the safe operating speeds for drilling equipment on sloped terrain.</p> <p><strong>Results: </strong>The analysis identified critical ascent angles at which a substantial reduction in speed occurs, as well as descent conditions that necessitate effective braking. The study determined that safe operating speeds should not exceed 3–4 m/s when ascending and 2–2.5 m/s when descending.</p> <p><strong>Conclusion:</strong> The proposed practical recommendations improve the safety and reliability of drilling equipment transportation across uneven terrain. The findings can be applied in route planning, selecting appropriate transportation technologies, and in developing operational guidelines for drilling equipment used in mountainous environments.</p>drilling equipmenttransportationsloped terrainoperating speedmathematical modelбұрғылау жабдықтарытасымалдаутаулы жерқозғалыс жылдамдығыматематикалық модельбуровое оборудованиетранспортировкахолмистая местностьскорость движенияматематическая модель1.Niyazbekova SU, Nazarenko OV. Modern Condition and Prospects of The Republic of Kazakhstan Oil and Gas Sector Development. Bulletin of Moscow Witte University. Series 1: Economics and Management. 2018;4(27): 7–14. (In Russ).2.Saipov ZA, Fakhrutdinov RZ. Sovremennoye sostoyaniye i puti sovershenstvovaniya Kazakhstanskoy neftepererabotki. Herald of Technological University. 2017;20(10):48–52 (In Russ.).3.Nikolaev NI, Ivanov AI. Higher efficiency in drilling of oil and gas wells under complicated conditions. Journal of Mining Institute. 2009;183:308-310. (In Russ).4.Khvalimova AA, Kramar VA, Rodkina AV, Ivanova OA. Drilling rig type selection for exploratory drilling in the Arctic conditions using analytic hierarchy method. Russian Journal of Water Transport. 2003;76:61–74. doi: 10.37890/jwt.vi76.335. (In Russ).5.Berdyguzhin LB, Amanbaeva ZK. History of Oil and Gas Fields of Mangistau. Bulletin of the Khalel Dosmukhamedov Atyrau University. 2022;66(3):27–39. doi: 10.47649/vau.2022.v66.i3.03. (In Kazakh).6.Eshanbabaev A. Traffic safety on the mountains. Engineering Solutions. 2020;6(16). doi: 10.32743/2658-6479.2020.6.16.316. (In Russ).7.Eshanbabaev A, Rakhimov R, Khabibullaev D. Ensuring the Safety of Vehicles in Mountainous Road Conditions. Universum: technical sciencies. 2022;5(98). doi: 10.32743/UniTech.2022.98.5.13602. (In Russ).8.Gorshkov YG, Starunova IN, Kalugin AA, Bakunin VV. Substantiation of the Time Necessary for Regulating Air Pressure in Tyres During the Movement of a Vehicle Down a Slope. Nauchnoye obozreniye. 2014;4:116–122. (In Russ).9.Gorshkov YG, Starunova IN, Kalugin AA. Avtomaticheskoye regulirovaniye davleniya vozdukha v shinakh – faktor bezopasnogo dvizheniya kolesnykh mashin na sklonakh. Technique in Agriculture. 2014;1:13–15. (In Russ).10.Gorshkov YG, Bobrov SV, Starunova IN, Kalugin AA. Automation of the process of Wheeled Machine Stability During the Movement Along the Transverse and Longitudinal Slope. Nauchnoye obozreniye. 2014;12:59–65. (In Russ).11.Ponomarenko MN. Problemy soderzhaniya avtomobil’nykh dorog v gornoy mestnosti. Dorogi I mosty. 2020;44:215–224. (In Russ).12.Eshanbabaev A, Rakhimov R, Akhmadzhonov S. Ensuring the Safety of Vehicles in Mountainous Road Conditions. Universum: technical sciencies. 2022;5(98). doi: 10.32743/UniTech.2022.98.5.13599. (In Russ).13.Gorshkov YG, Starunova IN, Kalugin AA, Belousov MA. Study of the influence of slope angle on the disbalance of loading the boards of a wheeled vehicle and the change in the direction of center of gravity vector. Nauchnoye obozreniye. 2014;1:28–33. (In Russ).14.Gorshkov YG, Starunova IN, Kalugin AA. Ustoychivost’ kolyosnykh mashin na sklonakh. Integratsiya nauli I biznesa v agropromyshlennom komplekse: Proceedings of International scientific and practical conference, dedicated to the 70th anniversary of the Kurgan State Agricultural Academy. 2014;3:191–195. (In Russ).15.Matsiy SI, Bezuglova EV, Leyer DV. Spetsial’nyye zashchitnyye meropriyatiya na gornykh dorogakh ot opasnykh geologicheskikh protessov. Proceedings of the conference “Construction in mountainous conditions”. 2017;1:73–81. (In Russ).