Sand and scale proof card pump

Abstract

The utility model provides a kind of sand and scale prevention card pumping unit, belong to oil production equipment technical field, including pump barrel, the plunger is equipped in the pump barrel, the plunger includes first plunger sealing portion and second plunger sealing portion, the upper end of the first plunger sealing portion is equipped with oil outlet valve cover, the lower end of the second plunger sealing portion is equipped with traveler, the upper end of the first plunger sealing portion is equipped with first sand scraping sand and scale storage portion, the outer periphery of the first sand scraping sand and scale storage portion is tightly matched with the inner wall of the pump barrel, the plunger is also equipped with second sand scraping sand and scale storage portion, and the second sand scraping sand and scale storage portion is between first plunger sealing portion and second plunger sealing portion;The plunger is divided into upper and lower two sealing section plunger, defined as double plunger, during the working process of double plunger, the sealing length of the plunger and the pump barrel is increased, dirt and sand particles in the pump barrel are discharged outside the pump barrel through sand scraping groove in time, and the sealing performance of the plunger and the pump barrel is maintained.

Description

Technical Field

[0001] This utility model relates to a sand-proof and scale-proof oil pump. Background Technology

[0002] In the oil extraction process, the oil pump is the core equipment. At the bottom of the oil well, due to different downhole geological conditions, the oil well may contain sand, gas, heavy oil, and scale and wax due to the temperature of the oil well. When conventional pumps are used in such oil wells, they may experience failures such as gas lock, sand blockage, and scale blockage, which affect pump efficiency, reduce pump life and shorten pump inspection cycle. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a sand-proof, scale-proof, and anti-stick oil pump.

[0004] The purpose of this utility model is achieved through the following technical measures: a sand-proof and scale-proof oil pump, comprising a pump barrel, wherein a plunger is provided inside the pump barrel, characterized in that: the plunger includes a first plunger sealing part and a second plunger sealing part, the upper end of the first plunger sealing part is provided with an oil outlet valve cover, the lower end of the second plunger sealing part is provided with a floating valve, the upper end of the first plunger sealing part is provided with a first sand-scraping and scale-collecting part, the first sand-scraping and scale-collecting part is located below the oil outlet valve cover, the outer periphery of the first sand-scraping and scale-collecting part is tightly fitted with the inner wall of the pump barrel, and the plunger is also provided with a second sand-scraping and scale-collecting part that can scrape sand and collect scale, the second sand-scraping and scale-collecting part is located between the first plunger sealing part and the second plunger sealing part.

[0005] As an improvement, the cross-section of the first sand-scraping and sand-collecting section is triangular.

[0006] As a further improvement, the cross-section of the second sand-scraping and sand-collecting section is rectangular.

[0007] As a further improvement, the outer circumferential diameter of the traveling valve is equal to the outer circumferential diameter of the plunger.

[0008] As a further improvement, the upper end of the pump barrel is provided with an upper oil pipe short-connector, and the lower end of the pump barrel is provided with a lower oil pipe short-connector.

[0009] As a further improvement, the free end of the lower oil pipe short connection is provided with a sedimentation pipe, the sedimentation pipe is provided with an anti-blocking fixing valve, and a sedimentation gap is provided between the sedimentation pipe and the anti-blocking fixing valve.

[0010] As a further improvement, the anti-clogging fixing valve is stepped, and the upper diameter of the anti-clogging fixing valve is larger than the lower diameter of the anti-clogging fixing valve.

[0011] As a further improvement, the inner surface of the pump barrel is provided with a carburized layer or a boronized layer.

[0012] As a further improvement, both the outer surface of the plunger and the outer surface of the traveling valve are provided with a hardened layer.

[0013] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are: First: The first and second plunger sealing parts of this novel invention divide the entire plunger into upper and lower sealing sections, which are defined as double plungers. During the operation of the double plungers, the sealing length between the plunger and the pump barrel is increased, and dirt and sand particles inside the pump barrel are discharged from the pump barrel in a timely manner through the sand scraper groove, while maintaining the sealing performance between the plunger and the pump barrel. Second: This new type of structure adopts the first sand scraping and sand-sludge storage part and the second sand scraping and sand-sludge storage part to prevent sand particles from entering the sealing gap between the plunger and the pump barrel, eliminate sand and scale blockage, reduce the wear of the pump barrel and the plunger, and protect the strengthening layer of the mating surface. When the oil well stops pumping, the sunken sand particles will fall into the pump barrel. When pumping, the sand in the pump barrel is scraped out by the second sand scraping and sand-sludge storage part structure at the upper end of the plunger, avoiding sand blockage.

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Appendix Figure 1 This is a structural schematic diagram of the initial position of this utility model; Appendix Figure 2 This is a schematic diagram of the structure of this utility model during the top stroke; Appendix Figure 3 This is a schematic diagram of the structure of this utility model during the downstroke; Appendix Figure 4 This is a schematic diagram of the structure of the plunger described in this utility model inside the pump barrel; Appendix Figure 5 yes Figure 3 Enlarged view of point A in the middle. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Example 1: As shown in the attached document Figure 1-3 As shown, an anti-sand and anti-scalding oil pump includes a pump barrel 1. The length and anti-impact distance of the pump barrel 1 are set according to the configuration of the oil pumping unit. The inner surface of the pump barrel 1 is provided with a carburized layer or a boronized layer for wear-resistant strengthening treatment. A plunger 2 is provided inside the pump barrel 1. The plunger 2 includes a first plunger sealing part 21 and a second plunger sealing part 22. The upper end of the first plunger sealing part 21 is provided with an oil outlet valve cover 3, and the lower end of the second plunger sealing part 22 is provided with a traveling valve 4. The outer circumferential diameter of the traveling valve 4 is equal to the outer circumferential diameter of the plunger 2. The outer surface of the plunger 2 and the outer surface of the traveling valve 4 are both provided with a hardened layer to increase wear resistance and prevent sand from getting stuck due to an increased sealing gap between the plunger 2 and the pump barrel 1.

[0021] The upper end of the pump barrel 1 is connected to an upper oil pipe short connector 5 via a coupling, and the lower end of the pump barrel 1 is connected to a lower oil pipe short connector 6 via a coupling. The free end of the lower oil pipe short connector 6 is provided with a sedimentation pipe 7, and an anti-clogging fixing valve 8 is provided inside the sedimentation pipe 7. A sedimentation gap 9 is provided between the sedimentation pipe 7 and the anti-clogging fixing valve 8. The anti-clogging fixing valve 8 is stepped, and the upper diameter of the anti-clogging fixing valve 8 is larger than the lower diameter of the anti-clogging fixing valve 8, which can increase the space of the sedimentation gap 9. The sedimentation gap 9 can settle the sand and scale discharged between the plunger 2 and the pump barrel 1, preventing the anti-clogging fixing valve 8 from being blocked.

[0022] The upper end of the first plunger sealing part 21 is provided with a first sand scraping and sand storage part 23, the cross-section of the first sand scraping and sand storage part 23 is triangular; the first sand scraping and sand storage part 23 is located below the oil outlet valve cover 3, and the outer periphery of the first sand scraping and sand storage part 23 is tightly fitted with the inner wall of the pump barrel 1, so that the plunger 2 can scrape sand and dirt when it moves upward.

[0023] The plunger 2 also has a second sand scraping and sand storage part 24, which is located between the first plunger sealing part 21 and the second plunger sealing part 22. The cross-section of the second sand scraping and sand storage part 24 is rectangular; it can realize the functions of scraping sand and storing sand.

[0024] When the pump is lowered into the well, the pump barrel coupling is connected to the tubing, and the pump is lowered to the oil well production position. Then the sucker rod is connected to the oil outlet valve cover 3 on the plunger 2, which drives the plunger 2 to the top position of the anti-blocking fixing valve 8 at the bottom of the pump barrel 1. Then the anti-surge distance H is raised, and the oil pump can carry out oil production operations.

[0025] During the upstroke, the plunger 2 moves upward to the second scraping and sand-collecting part 24 and enters the upper oil pipe short-connection 5. The oil and sand particles in the pump barrel 1 are discharged into the upper oil pipe short-connection 5 through the first scraping and sand-collecting part 23 and the second scraping and sand-collecting part 24. At this time, the second plunger sealing part 22 plays a sealing role.

[0026] During the downstroke, the plunger 2 moves downward and enters the lower oil pipe short-circuit 6 at the second sand scraping and sand storage part 24. At the same time, it discharges the sand and scale in the pump barrel 1 to prevent sand and oil from jamming the pump. At this time, the first plunger sealing part 21 plays a sealing role.

[0027] When the plunger 2 is in the pump cylinder 1, both the first plunger sealing part 21 and the second plunger sealing part 22 play a sealing role, achieving double sealing.

[0028] When the pump stops pumping, the sand and sludge in the oil in the oil pipe settle to the upper end of the plunger 2 and the inside of the pump barrel 1. When pumping starts, the plunger 2 moves upward and passes through the first sand and sludge scraping part 23 to discharge the dirt and sand particles from the pump barrel 1, preventing sand and sludge from getting stuck.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sand- and scale-resistant oil pump, comprising a pump barrel, wherein a plunger is provided inside the pump barrel, characterized in that: The plunger includes a first plunger sealing part and a second plunger sealing part. The upper end of the first plunger sealing part is provided with an oil outlet valve cover, and the lower end of the second plunger sealing part is provided with a floating valve. The upper end of the first plunger sealing part is provided with a first sand scraping and sand storage part, which is located below the oil outlet valve cover. The outer periphery of the first sand scraping and sand storage part is tightly fitted with the inner wall of the pump barrel. The plunger is also provided with a second sand scraping and sand storage part, which can scrape sand and store sand and dirt. The second sand scraping and sand storage part is located between the first plunger sealing part and the second plunger sealing part.

2. The anti-sand and anti-scaling oil pump according to claim 1, characterized in that: The cross-section of the first sand-scraping and sand-collecting section is triangular.

3. The anti-sand and anti-scaling oil pump according to claim 1, characterized in that: The cross-section of the second sand-scraping and sand-collecting section is rectangular.

4. The anti-sand and anti-scaling oil pump according to claim 1, characterized in that: The outer diameter of the movable valve is equal to the outer diameter of the plunger.

5. The anti-sand and anti-scaling oil pump according to claim 1, characterized in that: The upper end of the pump barrel is provided with an upper oil pipe short connector, and the lower end of the pump barrel is provided with a lower oil pipe short connector.

6. The anti-sand and anti-scaling oil pump according to claim 5, characterized in that: The free end of the short-connected oil pipe is provided with a sedimentation pipe, and an anti-blocking fixing valve is provided inside the sedimentation pipe. A sedimentation gap is provided between the sedimentation pipe and the anti-blocking fixing valve.

7. The anti-sand and anti-scaling oil pump according to claim 6, characterized in that: The anti-clogging fixing valve is stepped, and the upper diameter of the anti-clogging fixing valve is larger than the lower diameter of the anti-clogging fixing valve.

8. The anti-sand and anti-scaling oil pump according to claim 1, characterized in that: The inner surface of the pump barrel is provided with a carburized layer or a boronized layer.

9. The anti-sand and anti-scaling oil pump according to claim 1, characterized in that: Both the outer surface of the plunger and the outer surface of the traveling valve are provided with a hardened layer.

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