Improving the Energy Efficiency of the Use of Borehole Jet Pumps

The article presents rationales for choosing the depth of installation of an oil jet pump in the borehole that which ensures maximum efficiency of its operation. The operating parameters of the ejection system are determined by the joint solution of the characteristic equations of the high-pressure jet pump and the hydraulic system. In the process of solving the system of equations, the method of successive approximations, the Delphi software environment and PTC Mathcad resources were used. The equation of the characteristics of the jet pump hydraulic system was obtained by determining the pressures in its distinctive cross-sections and then presenting their values as the relative (dimensionless) head of the ejection system. Alteration the installation depth of the jet pump changes the characteristics of its hydraulic system, the parameters of the operating point of the pumping unit and its efficiency. In this case, the minimum permissible installation depth of the jet pump is determined by the value of the minimum pressure in the elements of the ejection system, which must exceed the value of the elastic pressure of saturated vapors of the oil and gas flow and ensure its operation in pre-cavitation mode. The probability of operation of a jet pump in cavitation mode was studied using the Bernoulli, Darcy – Weisbach and flow continity equations. The inversely dependence of the ejection coefficient and efficiency of the jet pump on the depth of its installation in the borehole has been revealed. If the jet pump is installed in the borehole at the optimal depth, its efficiency is increased by 30 %.

1. Zhu H.-Y., Liu Q.-Y., Wang T. (2014) Reducing the Bottom-Hole Differential Pressure by Vortex and Hydraulic Jet Methods. Journal of Vibroengineering, 16 (5), 2224–2249.

2. Panevnik A. V., Kontsur I. F., Panevnik D. A. (2018) Determination of Operational Parameters of the Near-Bit Ejector Assembly. Neftyanoe Khozyaistvo [Oil Industry], (3), 70–73 (in Russian).

3. Syed A. A., Jeffrey C. H., Gino F. D. (2002) Coiled – Tubing Vacuum Removes Drilling – Induced Damage. Oil and Gas Journal, 100 (13), 41–46.

4. Syed M. P., Najam B., Sacha S. (2014) Surface Jet Pumps Enhance Production and Processing. Journal of Petroleum Technology, 66 (11), 134–136.

5. Yao D., Lee K., Ha M., Cheong C., Lee I. (2018) Development of Hybrid Airlift-Jet Pump with its Performance Analysis. Applied Science, 8 (9), 1413. https://doi.org/10.3390/app8091413.

6. Ivanova I. E., Ivashechkin V. V., Veremenyuk V. V. (2018) Theoretical Studies of the Leaching Process of the Mudding Element in the Gravel Package of the Well Filter using the Unit for Reverse-Reagent Regeneration. Energetika. Izvestiya Vysshikh Uchebnykh Zavedenii i Energeticheskikh Ob’edinenii SNG = Energetika. Proceedings of the CIS Higher Education Institutions and Power Engineering Associations, 61 (1), 80–92. https://doi.org/10.21122/1029-7448-2018-61-1-80-92 (in Russian).

7. Osipov S. N. (2016) On Increasing Energy Security of Belarus. Energetika. Izvestiya Vysshikh Uchebnykh Zavedenii i Energeticheskikh Ob’edinenii SNG = Energetika. Proceedings of the CIS Higher Education Institutions and Power Engineering Associations, 59 (5), 464–478. https://doi.org/10.21122/1029-7448-2016-59-5-464-478 (in Russian).

8. Zdor G. N., Sinitsyn A. V., Avrutin O. A. (2017) Pump Group Automatic Control for Reducing its Energy Consumption. Energetika. Izvestiya Vysshikh Uchebnykh Zavedenii i Energeticheskikh Ob’edinenii SNG = Energetika. Proceedings of the CIS Higher Education Institutions and Power Engineering Associations, 60 (1), 54–66. https://doi.org/10.21122/1029-7448-2017-60-1-54-66 (in Russian).

9. Gugulothy S. K., Manchikatla S. (2014) Experimental and Performance Analysis of Single Nozzle Jet Pump with Various Mixing Tubes. International Journal of Recent Advances in Mechanical Engineering (IJMECH), 3 (4), 119–133. https://doi.org/10.14810/ijmech.2014.3411.

10. Ismagilov A. R., Spiridonov E. K. (2016) Operational Process and Characteristics of Liquid-Gas Jet Pumps with the Ejected Vapor-Gas Medium. Procedia Engineering, 150, 247–253. https://doi.org/10.1016/j.proeng.2016.06.756.

11. Sheha A. A. A., Nasr M., Hosien M. A., Wahba E. M. (2018) Computational and Experimental Study on the Water-Jet Pump Performance. Journal of Applied Fluid Mechanics, 11 (4), 1013–1020.

12. Drozdov A. N., Terikov V. A. (2009) Application of Submerged Jet Pumps Systems with Dual-String Lift for the Sticky Holes Operation. Neftyanoe Khozyaistvo [Oil Industry], (6), 68–72 (in Russian).

13. Anderson I., Freeman R., Pough T. (2006) Petroleum Technology Digest: Hydraulic Jet Pumps Prove Well Suited for Remote Canadian Field. World Oil, (8), 71–77.

14. Xiao L., Long X. (2015) Cavitating Flow in Annular Jet Pumps. International Journal of Multiphase Flow, 71, 116–132. https://doi.org/10.1016/j.ijmultiphaseflow.2015.01.001.

15. Velychkovych A. S., Panevnyk D. O. (2017) Study of the Stress State of the Downhole Jet Pump Housing. Naukovii Vіsnik NGU = Scientific Bulletin of National Mining University, (5), 50–55.

16. Panevnik D. A., Velichkovich A. S. (2017) Assessment of the Stressed State of the Casing of the Above-Bit Hydroelevator. Neftyanoe Khozyaistvo [Oil Industry], (1), 70–73 (in Russian).

17. Sokolov E. Ya., Zinger N. M. (1989) Jet Devices. Moscow, Energoatomizdat Publ. 352 (in Russian).