Oil well pump for oil extraction of heavy oil well
By introducing a hollow rotor screw pump and transmission components into the oil pumping pump used in heavy oil wells, the transportation and mixing of viscosity reducers with crude oil were realized, solving the problem of difficult heavy oil well extraction and improving extraction efficiency and economic benefits.
Patent Information
- Application Number
- CN202410470034.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2025-10-24
AI Technical Summary
In existing technologies, during the extraction process of heavy oil wells, the screw pump torque increases or it becomes unable to rotate due to the solidification of crude oil, resulting in extraction difficulties and serious energy waste.
A pumping unit for heavy oil well production was designed. It adopts a hollow rotor screw pumping unit and a transmission assembly. The viscosity reducer in the storage tank is transported to the pumping unit through the hollow channel, and mixed with the crude oil to reduce viscosity and reduce torque load.
It effectively reduces the viscosity of heavy oil, reduces the torque load on the oil pump, lowers the difficulty of extraction, saves energy, and increases production.
Smart Images
Figure CN120830636A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of oil well pumps, and particularly relates to an oil well pump for thick oil well oil production. BACKGROUND
[0002] When viscous crude oil ascends on the downhole pump, the gradual decrease in temperature causes the crude oil to gradually solidify and fail to flow, thereby causing the screw pump torque to increase and even fail to rotate, so that oil production is stopped, and the thick oil well in the oilfield is difficult to exploit.
[0003] In the prior art, a viscosity reducer is poured into the oil well casing to reduce the viscosity, but since the general oil well pump is installed several hundred meters below the oil well liquid level, and the viscosity reducer floats on the crude oil, the effect is limited, and the waste is serious. SUMMARY
[0004] The purpose of the embodiment of the present application is to provide an oil well pump for thick oil well oil production, aiming at solving the problems in the background art.
[0005] The embodiment of the present application is implemented as follows: an oil well pump for thick oil well oil production, the oil well pump comprising: a hollow rotor screw oil well pump placed in the downhole, a crude oil suction inlet of the hollow rotor screw oil well pump being connected with an overflow outlet; a transmission assembly connected between the driving head and the hollow rotor screw oil well pump, used for transmitting the rotation torque of the driving head to the hollow rotor screw oil well pump, the transmission assembly being a hollow structure; a storage tank connected with the transmission assembly, the viscosity reducer in the storage tank entering the hollow channel of the transmission assembly, being transported into the hollow rotor screw oil well pump, passing through the hollow channel of the hollow rotor screw oil well pump, and being discharged through the overflow outlet to mix with the crude oil and reduce the viscosity of the crude oil.
[0006] Preferably, the transmission assembly comprises a hollow oil well rod, an upper end of the hollow oil well rod being connected with the storage tank, and a lower end of the hollow oil well rod being connected with the hollow rotor screw oil well pump.
[0007] Preferably, the transmission assembly further comprises a clamping mechanism connected on the driving head and the upper end of the hollow oil well rod, used for transmitting the rotation torque output by the driving head to the upper end of the hollow oil well rod.
[0008] Preferably, the oil well pump further comprises an injection pump, a liquid inlet of the injection pump being connected with the storage tank, a liquid outlet of the injection pump being connected with a rotary joint, and the rotary joint being connected on the upper end of the hollow oil well rod.
[0009] Preferably, the injection pump is driven by a cam, and the cam is connected with the driving head.
[0010] Preferably, the oil well pump further comprises a mixing assembly for mixing the overflowed viscosity reducer with the crude oil at the suction port.
[0011] Preferably, the mixing assembly comprises an agitator, which is located outside the overflow.
[0012] The embodiment of the present invention provides an oil pump for oil production in heavy oil wells, which aims at the deficiencies in the prior art and improves the existing oil pumps. The hollow rotor of the hollow rotor screw oil pump can be used as a channel to transport a viscosity reducer. The transmission component transmits the rotational torque output by the drive head to the hollow rotor screw oil pump. The purpose of the hollowness of the transmission component is to allow the viscosity reducer to pass through. The specific operation is as follows: the viscosity reducer in the storage tank is transported to the transmission component, and is sent to the hollow channel of the hollow rotor screw oil pump through the hollow channel of the transmission component, and then sent to the overflow port for discharge, and mixed with the crude oil at the suction pump port to reduce the viscosity of the crude oil. The crude oil with reduced viscosity enters the inlet of the hollow rotor screw oil pump, which is beneficial to reducing the torque load of the hollow rotor screw oil pump, thereby greatly reducing the difficulty of heavy oil production, saving energy, reducing production costs, increasing production, and obtaining greater economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 A schematic structural diagram of a well pump for producing heavy oil wells provided by an embodiment of the present invention; Figure 2 A partially enlarged structural schematic diagram of a well pump for producing heavy oil wells provided by an embodiment of the present invention.
[0014] In the attached figure: 1-storage tank; 2-injection pump; 3-cam; 4-rotary joint; 5-upper end of hollow sucker rod; 6-clamping mechanism; 7-drive head; 8-lower end of hollow sucker rod; 9-hollow rotor screw pump; 10-agitator; 11-overflow port; 12-crude oil. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0016] The specific implementation of the present invention is described in detail below with reference to specific embodiments.
[0017] like Figures 1 to 2 FIG. 1 is a structural diagram of a pump for producing heavy oil wells according to an embodiment of the present invention, wherein the pump comprises: A hollow rotor screw pump 9 is placed underground, and an overflow port 11 is connected to the crude oil suction port of the hollow rotor screw pump 9; The transmission assembly is connected between the driving head 7 and the hollow rotor screw oil pump 9, and is used for transmitting the rotating torque of the driving head 7 to the hollow rotor screw oil pump 9, and the transmission assembly is hollow structure. The storage tank 1 is connected with the transmission assembly, the viscosity reducer in the storage tank 1 enters the hollow channel of the transmission assembly, is transported into the hollow rotor screw oil pump 9, passes through the hollow channel of the hollow rotor screw oil pump 9, is discharged through the overflow outlet 11, is mixed with the crude oil 12, and reduces the viscosity of the crude oil 12.
[0018] In one embodiment of the present application, the heavy oil well oil extraction pump is improved on the basis of the prior art, the hollow rotor of the hollow rotor screw oil pump 9 can be used as a channel to transport the viscosity reducer, the transmission assembly transmits the rotating torque output by the driving head 7 to the hollow rotor screw oil pump 9, and the hollow transmission assembly can pass through the viscosity reducer, and the specific operation is as follows: the viscosity reducer in the storage tank 1 is transported into the transmission assembly, is sent to the hollow channel of the hollow rotor screw oil pump 9 through the hollow channel of the transmission assembly, is then sent to the overflow outlet 11 (also the crude oil suction inlet) for discharge, is mixed with the crude oil 12 sucked into the pump inlet, reduces the viscosity of the crude oil 12, the crude oil 12 with low viscosity enters the inlet of the hollow rotor screw oil pump 9, which is beneficial to reducing the torque load of the hollow rotor screw oil pump 9, and then greatly reduces the difficulty of heavy oil exploitation, saves energy, reduces the cost of exploitation, improves the yield, and obtains greater economic benefits.
[0019] As shown in Figure 1 As a preferred embodiment of the present application, the transmission assembly comprises a hollow oil pumping rod, the upper end 5 of the hollow oil pumping rod is connected with the storage tank 1, and the lower end 8 of the hollow oil pumping rod is connected with the hollow rotor screw oil pump 9. The transmission assembly further comprises a clamping mechanism 6 connected between the driving head 7 and the upper end 5 of the hollow oil pumping rod, and is used for transmitting the rotating torque output by the driving head 7 to the upper end 5 of the hollow oil pumping rod.
[0020] The hollow oil pumping rod is used as a transmission shaft for transmitting the rotating torque output by the driving head 7 to the hollow rotor screw oil pump 9, the outer circle of the oil pumping rod is connected with the driving head 7 in a clamped manner through the clamping mechanism 6, and then the rotating torque output by the driving head 7 is transmitted to the upper end 5 of the hollow oil pumping rod, and the lower end 8 of the hollow oil pumping rod is connected with the hollow rotor screw oil pump 9 through a screw connection, and then the torque is transmitted to the hollow rotor screw oil pump 9.
[0021] As shown in Figure 1 As a preferred embodiment of the present application, the oil pump further comprises an injection pump 2, the liquid inlet of the injection pump 2 is connected with the storage tank 1, the liquid outlet of the injection pump 2 is connected with the rotary joint 4, and the rotary joint 4 is connected with the upper end 5 of the hollow oil pumping rod. The injection pump 2 is driven by a cam 3 connected to a driving head 7.
[0022] The injection pump 2 can quantitatively supply the viscosity reducer as required, the rotary joint 4 is a rotary oil passage structure, and is screwed to the upper end 5 of the hollow sucker rod. The cam 3 is driven by the driving head 7 to control the start of the injection pump 2. The viscosity reducer stored in the storage tank 1 is quantitatively pressurized by the injection pump 2, enters the rotary joint 4, enters the upper end 5 of the hollow sucker rod, and is sent to the hollow rotor upper end of the hollow rotor screw rod oil pump 9 through the hollow channel, and is overflowed at the overflow outlet 11.
[0023] As shown in Figure 2 As a preferred embodiment of the present application, the oil pump further comprises a mixing assembly for mixing the overflowed viscosity reducer with the crude oil 12 at the suction port. The mixing assembly comprises a stirrer 10 located outside the overflow outlet 11.
[0024] The stirrer 10 can mix the viscosity reducer overflowed from the overflow outlet 11 with the crude oil 12 at the suction port. The sufficient mixing is conducive to the viscosity reduction of the crude oil 12, and the viscosity-reduced crude oil 12 is conducive to upward flow, which reduces the required power of the screw pump, saves energy, and increases production.
[0025] The working principle of the oil pump for thickened oil well is as follows: the driving head 7 is started, the driving head 7 controls the injection pump 2 through the cam 3, the viscosity reducer in the storage tank 1 is quantitatively pumped and pressurized, enters the upper end 5 of the hollow sucker rod through the rotary joint 4, is sent to the hollow rotor upper end of the hollow rotor screw rod oil pump 9 through the hollow sucker rod lower end 8, is sent to the lower end through the hollow rotor inner space, is overflowed at the overflow outlet 11 to mix with the crude oil 12, is fully stirred and mixed by the stirrer 10, the viscosity of the crude oil 12 is reduced, and the viscosity-reduced crude oil 12 enters the inlet of the hollow rotor screw rod oil pump 9, is lifted from the downhole to the uphole.
[0026] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A sucker rod pump for heavy oil well production, characterized in that, The oil pumping device comprises: a hollow rotor screw oil pumping device (9) arranged in a well, wherein an overflow outlet (11) is connected to a crude oil suction inlet of the hollow rotor screw oil pumping device (9); a transmission assembly connected between the driving head (7) and the hollow rotor screw oil pumping device (9) and used for transmitting the rotating torque of the driving head (7) to the hollow rotor screw oil pumping device (9), wherein the transmission assembly is hollow; a storage tank (1) connected to the transmission assembly, wherein a viscosity reducer in the storage tank (1) enters the hollow channel of the transmission assembly, is transported into the hollow rotor screw oil pumping device (9), passes through the hollow channel of the hollow rotor screw oil pumping device (9), is discharged through the overflow outlet (11), and is mixed with the crude oil (12) to reduce the viscosity of the crude oil (12).
2. The heavy oil well production pump according to claim 1, characterized in that, The transmission assembly comprises a hollow sucker rod, wherein the upper end (5) of the hollow sucker rod is connected to the storage tank (1), and the lower end (8) of the hollow sucker rod is connected to the hollow rotor screw oil pumping device (9).
3. The heavy oil well production oil-well pump according to claim 2, characterized in that, The transmission assembly further comprises a clamping mechanism (6) connected to the driving head (7) and the upper end (5) of the hollow sucker rod and used for transmitting the rotating torque output by the driving head (7) to the upper end (5) of the hollow sucker rod.
4. The oil well pump for producing heavy oil wells according to claim 2, characterized in that: The oil pumping device further comprises an injection pump (2), wherein the liquid inlet of the injection pump (2) is connected to the storage tank (1), the liquid outlet of the injection pump (2) is connected to the rotary joint (4), and the rotary joint (4) is connected to the upper end (5) of the hollow sucker rod.
5. The heavy oil well production oil-well pump according to claim 4, characterized in that, The injection pump (2) is driven by a cam (3), and the cam (3) is connected to the driving head (7).
6. The heavy oil well production pump according to claim 1, characterized in that, The oil pumping device further comprises a mixing assembly used for mixing the overflowed viscosity reducer and the crude oil (12) at the liquid suction inlet.
7. The heavy oil well production oil-well pump according to claim 6, characterized in that, The mixing assembly comprises a stirrer (10), and the stirrer (10) is located outside the overflow outlet (11).