Development and pilot testing of a sucker-rod pump with a movable cylinder

UDK: 622.276.53.054
DOI: 10.24887/0028-2448-2022-6-95-97
Key words: high-viscosity oil, throughput, sucker-rod pump, movable cylinder, controlled valve
Authors: M.Z. Valitov (Almetyevsk State Oil Institute, RF, Almetyevsk)

Currently, a significant volumes of oil is extracted under complicated conditions, which include a significant slope of the well, as well as the rise of the reservoir medium from horizontal branches and high-viscosity oil. At the same time, a significant part of wells with high-viscosity oil, in order to increase the inflow, are drilled with a horizontal tap. Equipping most wells with sucker-rod pumps and the ability to adjust the length and number of strokes of the polished rod in a wide range allows to use these pumps in complicated conditions. The design features of the sucker-rod pumps such as their limited diameter and the coaxial arrangement of the valves with partial overlap of the valve body passage by the shut-off valve body significantly reduce these pumps throughput. Due to limited weight ball locking body does not always provide a tight overlap of the seat channel, especially when lifting high-viscosity oil and in inclined wells. So, the creation of rod pumps with full-flow valves those ensure the efficient operation of pumps in the environment of high-viscosity oil, as well as installed in inclined and horizontal wells is relevant. The article is considers the design and principle of operation of a rod pump with a movable cylinder and a controlled discharge valve, in which the valves are moved coaxially to the cylinder. In 2019-2021 the proposed sucker-rod pump has successfully passed pilot tests at the Vishnevo-Polyanskoye field of Oil and Gas Production Department Nurlatneft.

References

1. Persiyantsev M.N., Dobycha nefti v oslozhnennykh usloviyakh (Oil production in complicated conditions), Moscow: Nedra-Biznestsentr Publ., 2000, 653 p.

2. Patent RU 2567919 C1, Sucker rod pumping unit, Inventors: Ibragimov N.G., Zabbarov R.G., Zalyatov M.M., Sadykov A.F., Kozlov A.A., Kozlov D.A., Kalimullin D.M., Urazakov K.R.

3. Patent RU 2125184 C1, Oil-well sucker-rod pump unit, Inventors: Khaliullin F.Kh., Persiyantsev M.N.

4. Patent RU 2169290 C1, Oil-well sucker-rod pump, Inventors: Zakharov B.S., Bogomol'nyy E.I., Drachuk V.R.

5. Patent RU 2692588 C1, Pump, Inventors: Valitov M.Z., Nurgaliev R.Z., Bikbulatova G.I., Shulin V.S., Ganiev T.A.

6. Patent RU 2708764 C1, Bottom-hole sucker-rod pump, Inventors: Valitov M.Z., Nurgaliev R.Z., Bikbulatova G.I.


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