Stimulation device for flushing down the pump under the immobile string of the oil well

Abstract

The utility model relates to an oil production well immobile string pump down flushing stimulation device, it includes shell and sets up the rotary seat seal module on the shell, is provided with high -speed flushing unit on the rotary seat seal module, the rotary seat seal module includes the inner rotator that rotates on the shell, is distributed in order on the inner rotator outer side wall and has seat seal friction block, rotary support one -way slip and sealing glue bucket, seat seal friction block, rotary support one -way slip and sealing glue bucket rotate and open, the utility model discloses reasonable in design, compact structure and convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of oil production and relates to a pump flushing and production enhancement device for oil wells with stationary tubing. Background Technology

[0002] The disadvantages of existing downhole unblocking methods are as follows: 1. Existing coiled tubing cleaning methods have high initial equipment investment costs, similarly high production and operating costs, and require specialized personnel for stable operation. Furthermore, subsequent equipment maintenance is extensive and costly. 2. Moving the work team up to clean the wellbore with all production tubing is a complex process with high costs and extended operation time, impacting production progress. 3. Injecting chemical agents can cause reservoir contamination and damage, resulting in high construction costs.

[0003] The disadvantages of existing methods are as follows: 1. Existing coiled tubing cleaning methods involve high initial equipment investment costs, similarly high production and operating costs, and require specialized personnel for stable operation. Furthermore, subsequent equipment maintenance is extensive and costly. 2. Moving the work team to clean all production tubing strings involves numerous procedures, high construction costs, and long operation times, impacting production progress. 3. Injecting chemical agents can cause reservoir contamination and damage, resulting in high construction costs.

[0004] How to achieve the effect of cleaning and increasing production of oil pumps without moving the tubing string has become an urgent technical problem to be solved.

[0005] Oil wells are prone to scaling, wax buildup, and thickened oil, leading to blockages in downhole production pumps, poor fluid supply, and the need for controlled production or even production shutdowns. Blockages in production pumps typically require a work crew to remove all production tubing for wellbore cleaning or to inject chemical agents to address low production or well shutdowns. However, these methods often fail to provide flushing and production enhancement to the near-wellbore area while maintaining the tubing, and the chemical injections can pollute the reservoir. Furthermore, the work crew-based methods are costly and time-consuming. This invention effectively solves these problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a pump-down flushing and production enhancement device for oil wells without moving the tubing string. Through the structure of the tool itself, pump-down flushing and production enhancement can be achieved, so that oil wells can achieve pump-down flushing and production enhancement without moving the tubing string.

[0007] To solve the above problems, the technical solution adopted by this utility model is as follows: A pump-down flushing and production enhancement device for a stationary tubing string in an oil well includes a housing and a rotary seat module mounted on the housing. A high-speed rinsing section is provided on the rotary sealing module; The rotary seat module includes an inner rotating body that rotates on the outer shell; On the outer wall of the inner rotating body, there are sequentially distributed a sealing friction block, a rotating support one-way slip, and a sealing glue bucket. The seated friction block, the rotary support one-way slip, and the sealing glue bucket open after rotation; The high-speed rinsing unit includes a backwashing channel provided on the inner rotating body and a high-speed rinsing chamber provided in the middle of the inner rotating body; The backwash channel is connected to the high-speed flushing chamber.

[0008] As a further improvement to the above technical solution: An upper connector and a lower connector are respectively provided at the upper and lower ends of the outer casing.

[0009] The inner rotating body includes a rotating outer wall and a central portion disposed within the rotating outer wall; An oil outlet channel, separate from the inner rotating body, is provided on the outer shell.

[0010] A filter tube is installed at the lower end of the outer casing.

[0011] The outer casing is set inside the outer wall of the oil pipe, and the rotating seat module divides the oil sleeve annulus into a lower cavity and an upper cavity.

[0012] The lower cavity corresponds to the oil layer; When the inner rotating body rotates, the upper cavity and the lower cavity are sealed and isolated. In the upper part of the upper cavity, the high-speed flushing cavity is connected to the backwashing channel.

[0013] When the inner rotating body rotates, the seated friction block, the rotating support one-way slip, and the outer end of the sealing rubber bucket come into contact with the outer tube wall under the action of centrifugal force.

[0014] The lower end of the oil outlet channel is connected to the lower cavity. The oil outlet channel has an independent output at the top, thus separating cleaning and production enhancement.

[0015] The working principle of this utility model is as follows: When the well completion production tubing is connected to the pump, the utility model is used to achieve one-way slip support by rotating the tubing, expanding the rubber barrel to seal the annulus, and simultaneously opening the connection between the well washing channel and the backwashing channel. The well washing channel allows the positive pressure fluid in the tubing to only enter the oil layer below the packer in the tubing, while the pressure fluid in the annulus does not enter the oil layer but enters the tubing through the reversing channel, thereby achieving the flushing of the oil production pump.

[0016] When low fluid levels or blockages occur during oil well production, simply remove the pump core from the pump barrel using surface equipment, establish circulation in the annulus and tubing, and then pump high-pressure fluid through the surface high-pressure pump into the annulus, backwash channel, high-speed flushing chamber, and tubing for continuous cleaning to achieve flushing and increased production.

[0017] This invention enables flushing and production enhancement through the tool's own structure, allowing oil wells to achieve flushing and production enhancement without moving the tubing string, while simultaneously improving production efficiency and reducing equipment investment costs.

[0018] This invention enables the flushing and production enhancement of oil pumps without moving the tubing string.

[0019] The advantages of this invention are: 1. It allows for flushing and increased production in oil wells without moving the tubing string. 2. By rotating the tubing string through the tool's structure, slip support and rubber sleeve expansion and sealing can be achieved, sealing the annulus while opening the flushing channel. 3. The flushing fluid does not need to enter the oil layer, thus protecting the oil layer. 4. This solution only requires routine well flushing maintenance, resulting in low maintenance costs and short maintenance cycles.

[0020] This utility model is reasonably designed, low in cost, sturdy and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and easy to use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the rinsing structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the upper connector structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the seat seal friction block structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the high-speed flushing chamber structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the oil dispensing structure of this utility model.

[0026] Figure 6 This is a schematic diagram of the structure of this utility model.

[0027] Figure 7 This is a detailed structural diagram of the internal structure of the outer shell of this utility model.

[0028] The components are: 1. Outer shell; 2. Upper connector; 3. High-speed flushing chamber; 4. Backwashing channel; 5. Sealing barrel; 6. Rotary support one-way slip; 7. Inner rotating body; 8. Sealing friction block; 9. Lower connector; 10. Filter tube; 11. Oil layer; 12. Oil sleeve annulus; 13. Outer tube wall; 14. Oil outlet channel; 15. Lower chamber; 16. Upper chamber. Detailed Implementation

[0029] like Figures 1-7This utility model includes a filter tube, a rotary seat module, and a high-speed rinsing section, specifically including the following components: an upper connector, a housing, a backwash channel, a high-speed rinsing chamber, an inner rotating body, a sealing rubber barrel, a rotary support one-way slip, a seat friction block, a lower connector, and a filter tube.

[0030] The rotary sealing module includes an inner rotating body, a sealing friction block, a rotary support one-way slip, and a sealing glue bucket. like Figure 3 The outer casing has a liquid inlet.

[0031] The high-speed flushing section includes a backwashing channel and a high-speed flushing chamber; like Figure 4 The upper and lower connectors are the connecting parts; under the condition that the tubing and casing are sealed, the inner rotating body is started by rotating the tubing, and the one-way slip and sealing rubber barrel are gradually opened under the rotation to achieve the seat seal, sealing the annulus of the tubing and casing, and at the same time opening the well washing channel and anchoring it on the casing. The lower connector can be connected to a filter screen, and the upper connector is connected to the lower end of the oil pipe; When the well pump or tubing becomes clogged, causing a decrease in fluid volume and requiring flushing, the flushing fluid flows through the annulus into the backwash channel, passes through the high-speed flushing chamber, flushes the pump's inner cavity, and is flushed out to the surface through the tubing.

[0032] like Figure 5 When completing the production tubing in an oil well, this invention achieves unidirectional slip support and rubber barrel expansion and sealing of the annulus by rotating the tubing, while simultaneously opening the well-washing channel. The well-washing channel allows the positive pressure fluid in the tubing to enter only the oil layer below the packer inside the tubing, while the pressure fluid in the annulus does not enter the oil layer. Instead, it enters the tubing through the reverse backwashing channel, thereby flushing the oil production pump.

[0033] like Figure 6 When low fluid levels or blockages occur during oil well production, simply remove the pump core from the pump barrel using surface equipment, establish circulation in the annulus and tubing, and then pump high-pressure liquid through the surface high-pressure pump into the annulus, backwash channel, high-speed flushing chamber, and tubing for continuous cleaning to achieve flushing and increased production.

[0034] refer to Figure 7 The tool of this utility model has a double-layer structure. After it enters the target layer, it rotates and the friction block on the tool and the sleeve cause the reversing channel to reversing slip to be displaced. At the same time, the tubing is pressed down and the 5-8 ton rubber bucket is expanded and sealed, sealing the oil sleeve annulus.

[0035] An oil outlet channel 14, which is separate from the inner rotating body 7, is provided on the outer casing 1.

[0036] The lower end of the oil outlet channel 14 is connected to the lower cavity 15; The oil outlet channel 14 has an independent output at the top.

[0037] in, Figure 1-6 This is a schematic diagram illustrating the principle. The oil outlet channel 14 can be either spiral or straight. Figure 7 This is an engineering drawing of the outer casing.

[0038] During the production process, oil wells may encounter blockages near the borehole caused by mud or slight scaling, leading to a decrease in production fluid or even production stoppage. This device can backflushing the well can create negative pressure in the near-wellbore area to remove blockages and increase production.

[0039] This invention achieves sealing when rotating; if rotation stops, the flushing and production-increasing effects cannot be achieved.

[0040] This utility model is described in detail for the purpose of making the disclosure clearer, and the prior art will not be listed one by one.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. It is obvious to those skilled in the art that multiple technical solutions of this utility model can be combined. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. All technical contents not described in detail in this utility model are publicly known technologies.

Claims

1. A pump-down flushing and production enhancement device for oil wells with the tubing stationary, characterized in that: Includes a housing (1) and a rotary seat module disposed on the housing (1); A high-speed rinsing section is provided on the rotary sealing module; The rotary seat module includes an inner rotating body (7) that rotates on the outer shell (1); On the outer side wall of the inner rotating body (7), there are sequentially distributed a sealing friction block (8), a rotating support one-way slip (6), and a sealing glue bucket (5); The seated friction block (8), the rotating support one-way slip (6), and the sealing glue bucket (5) are opened after rotation; The high-speed rinsing unit includes a backwashing channel (4) provided on the inner rotating body (7) and a high-speed rinsing chamber (3) provided in the middle of the inner rotating body (7); The backwash channel (4) is connected to the high-speed flushing chamber (3).

2. The oil well pump-down flushing and production enhancement device according to claim 1, characterized in that: An upper connector (2) and a lower connector (9) are respectively provided at the upper and lower ends of the outer shell (1).

3. The oil well stationary tubing pump flushing and production enhancement device according to claim 1 or 2, characterized in that: The inner rotating body (7) includes a rotating outer wall and a central portion disposed in the rotating outer wall; An oil outlet channel (14) is provided on the outer shell (1) and is separate from the inner rotating body (7).

4. The oil well pump-down flushing and production enhancement device according to claim 3, characterized in that: A filter tube (10) is provided at the lower end of the outer casing (1).

5. The oil well pump-down flushing and production enhancement device according to claim 4, characterized in that: The outer casing (1) is set inside the outer wall (13) of the oil pipe, and the rotating seat module divides the oil sleeve annulus (12) into a lower cavity (15) and an upper cavity (16).

6. The oil well pump-down flushing and production enhancement device according to claim 5, characterized in that: The lower cavity (15) corresponds to the oil layer (11); When the inner rotating body (7) rotates, the upper cavity (16) and the lower cavity (15) are sealed and isolated. In the upper part of the upper cavity (16), the high-speed flushing cavity (3) is connected to the backwashing channel (4).

7. The oil well pump-down flushing and production enhancement device according to claim 6, characterized in that: When the inner rotating body (7) rotates, the outer ends of the seated friction block (8), the rotating support one-way slip (6), and the sealing rubber bucket (5) come into contact with the outer tube wall (13) under the action of centrifugal force. The lower end of the oil outlet channel (14) is connected to the lower cavity (15); The oil outlet channel (14) has an independent output at the top.

Images