IMPROVEMENT OF THE HYDRAULIC EXCAVATOR’S WORKING EQUIPMENT

Introduction. The age composition of the main pipelines of Russia significantly exceeds the period of their standard operation, which necessitates the provision of their reliable, trouble-free operation sometimes in difficult environmental conditions. Timely delivery of the required amount of hydrocarbon raw materials to various regions of our country and abroad depends on the quality and speed of the repair work. The speed of the pipeline overhaul, which consists in replacing old pipes with new ones, depends on the effectiveness of the entire repair string as a whole. The main excavation machine is a hydraulic excavator. Soil is removed on both sides of the pipeline, but there is a problem of excavation under the pipeline. Existing solutions to the problem are highly complex, which only complicates the repair process. Therefore, the authors develop the working equipment of the excavator, which is installed after digging the pits of the trench.

Materials and methods. The authors performed a review and analysis of existing equipment designs for the soil development under the pipeline. Moreover, the authors developed a new design of interchangeable working equipment for a single-bucket excavator.

Results. As a result, the authors presented a detailed description of the working equipment of a single-bucket excavator and the principle of its operation.

Discussion and conclusions. The proposed technical solution allows excluding excavation under the main pipeline, which is carried out using a trench tool. This method significantly increases the efficiency of excavation and the pace of repair work as a whole.

The authors have read and approved the final manuscript. Financial transparency: the authors have no financial interest in the presented materials or methods. There is no conflict of interest.

1. Aladinskiy V.V., Malkov A.G., Ushakov A.B. Metod remonta gazoprovodov s ispol’zovaniyem trub, byvshikh v ekspluatatsii [Method of gas pipeline repair using used pipes]. Territoriya Neftegaz. 2009; 8: 56–60 (in Russian).

2. Hopkins P. Pipelines: Past, Present, and Future // The 5th Asian Pacific IIW International Congress. Sydney. 2007: 27.

3. Bruce W.-A., Amend W.- E. Advantages of Steel Sleeves over Composite Materials for Pipeline Repair. Evaluation, Rehabilitation & Repair of Pipelines: conferences. Berlin. 2010: 32–34.

4. Kurkin A. S., Brovko V.V., Ponomarev P.A. Osobennosti remontnykh konstruktsiy i tekhnologiy ikh svarki pri remonte magistral’nykh truboprovodov bez zameny [Features of repair structures and their welding technologies during repair of main pipelines without replacement]. Zhurnal neftegazovogo stroitel’stva. 2015; 1: 40–43 (in Russian).

5. Meritsidi I.I., Shotidi K.KH. Sravnitel’nyy analiz metodov remonta podvodnykh nefteprovodov [Comparative analysis of methods of repair of underwater oil pipelines]. Neft’, gaz i biznes. 2016; 9: 8–12 (in Russian).

6. Archibald I.C. Soil stabilizer. Pipeline and qas Journal. 1984; 11: 44–46.

7. Bol’shakov A.M., Syromyatnikova A.S., Alekseyev A.A. Neproyektnyye polozheniya gazoprovodov, prolozhennykh podzemnym sposobom v rayonakh mnogoletnemerzlykh gruntov [Non-project positions of underground gas pipelines in areas of long-term frozen soils]. Gazovaya promyshlennost’. 2014; 4: 66–69 (in Russian).

8. Botvina L.R., Makhutov N.A., Permyakov V.N. Bezopasnost’ magistral’nykh i tekhnologicheskikh truboprovodov: vliyaniye rassloyeniy na ikh rabotosposobnost’ [Safety of main and process pipelines: effect of stratification on their operability]. Neft’, gaz i biznes. 2002; 1: 41–46 (in Russian).

9. Bogoyavlenskiy V.I. Arktika i Mirovoy okean: sovremennoye sostoyaniye, perspektivy i problemy osvoyeniya resursov uglevodorodov. Monografiya [Arctic and oceans: current state, prospects and problems of hydrocarbon resources development. Monograph]. Moscow, VEO, 2014:11–175 (in Russian).

10. Zorin Ye.Ye., Tolstov A.E., Yefimov V.M. Napryazhenno-deformirovannoye sostoyaniye truboprovodov podzemnoy prokladki v usloviyakh kriolitozony [Stress-deformed condition of underground gasket pipelines in cryolitosone conditions]. Neft’, gaz i biznes. 2015; 9: 9–12 (in Russian).

11. Chernyayev K.V. Monitoring tekhnicheskogo sostoyaniya nefteprovodov [Monitoring of the technical condition of oil pipelines]. Truboprovodnyy transport nefti. 2000; 9: 14–17 (in Russian).

12. Bulavintseva A.D., Mazurkin P.M. Dinamika avarij po prichinennomu ushherbu na linejnoj chasti magistral’nyh nefteprovodov OAO «AK «Transneft’» [Dynamics of accidents on the damage caused on the linear part of the main oil pipelines of JSC “AK Transneft”]. Sovremennyye naukoyemkiye tekhnologii. 2011; 4: 64–67 (in Russian).

13. Hopkins P. Pipelines: Past, Present, and Future. The 5th Asian Pacific IIW International Congress. Sydney, 2007: 27.

14. Nabiyev R.R. Obespecheniye nadozhnosti dlitel’no ekspluatiruyemykh nefteprovodov [Ensuring reliability of long-term operated oil pipelines]. Truboprovodnyy transport nefti. 2010; 12: 9–11 (in Russian).

15. Dushin V.A.; Shammazov, A.M. Kapital’nyy remont lineynoy chasti magistral’nykh nefteprovodov: monografiya [Major repair of line part of main oil pipelines: monograph]. Ufa 2008: 272 (in Russian).

16. Amiya K.L. Material Selection and Performance in Oil and Gas Industry. Applied Metallurgy and Corrosion Control . 2017: 269-347. DOI: 10.1007/978- 981-10-4684-1-9 269.

17. Timashev S., Bushinskaya A. Methods of Assessing Integrity of Pipeline Systems with Different Types of Defects. Diagnostics and Reliability of Pipeline Systems. 2016: 9–43. DOI: 10.1007/978-3-319- 25307-7-2.

18. Mourad N., Rabia K. Pipelines Reliability Analysis Under Corrosion Effect and Residual Stress. Arabian Journal for Science and Engineering. 2015; 40, Iss. 11: 3273–3283. DOI: 10.1007/s13369-015- 1723-9.

19. Bulavintseva A. D., Mazurkin P. M. Dinamika avariy po prichinennomu ushcherbu na lineynoy chasti magistral’nykh nefteprovodov OAO AK «Transneft’»[ Dynamics of accidents on the damage caused on the linear part of the main oil pipelines of JSC Transneft]. Sovremennyye naukoyemkiye tekhnologii. 2011; 4: 64–67 (in Russian).

20. Sharygin YU. M., Romantsov S. V., Sharygin A. M. Povysheniye prochnosti defektnykh trub, usilennykh kompozitnymi muftami s boltovym soyedineniyem [Increased strength of defective pipes reinforced by composite couplings with bolted connection]. Transport i podzemnoye khraneniye gaza. 2002; 3:104–107 (in Russian).

21. Luk’yanov A. A. Analiz napryazhenno-deformirovannogo sostoyaniya remontnykh konstruktsiy magistral’nykh truboprovodov [Analysis of stress-strain state of repair structures of main pipelines]. Svarka i kontrol’. 2013: 181–188 (in Russian).

22. Yemel’yanov R.T., Sultanov N.S., Zakurdayev A.V., Skurikhin L.V. Modelirovaniye dinamiki reguliruyemogo gidromotora [Simulation of controlled hydraulic motor dynamics] Vestnik KrasGAU. 2014; 8: 181–185 (in Russian).

23. Tiratsoo John About decommissioning of production and transportation of oil: the UK experience. Science & Technologies: Oil and Oil Products Pipeline Transportation. 2017; 1: 82–83.

24. Hibbeler R.C. Fluid Mechanics. Part 2. Pearson Pumtke Hall, 2015; 904. 25. Charru F. Hydrodynamic Instabilities. Cambridge University Press, 2011; 391.