Water plugging device for oil field production
By adopting a combined design of limiting components and water blocking air bags in the water blocking device for oil field production, the problem of uneven contact between the packer and the inner wall of the oil well is solved, and more efficient water blocking effect and stability are achieved.
Patent Information
- Application Number
- CN202422352117.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-26
AI Technical Summary
During the oil well mining process, the contact between the sealer and the inner wall of the oil well is uneven, resulting in uneven pressure distribution on the sealing surface, and some areas cannot form an effective seal, affecting the water blocking effect.
A water blocking device for oil field production is designed, including a packer body, an oil pump, an oil pump, a pump pipe, a water blocking air bag, a limiting assembly and a servo electric cylinder. The precise positioning and sealing of the sealing sealing water is achieved through the synchronous driving of the limiting assembly and the inflation of the water-blocking air bag.
It improves the effectiveness and accuracy of sealing, ensures the stable positioning of the water blocking device in the oil well, and enhances the water blocking reliability and sealing under high-pressure water injection conditions.
Smart Images
Figure CN222949826U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of oilfield mining equipment, in particular to a water plugging device for oilfield production. Background Art
[0002] An oil field is the sum of oil and gas reservoirs in the same oil and gas production area under the control of a single geological structural factor. An oil and gas field may have one or more oil and gas reservoirs. The area mainly composed of oil reservoirs is called an oil field, and the area mainly composed of gas reservoirs is called a gas field. The geological factors controlling the oil and gas production area are as follows: In the later stage of oil field exploitation, water will inevitably appear in the oil wells, which may cause the oil field to be flooded prematurely and unable to continue exploitation, resulting in a decrease in oil exploitation efficiency. Therefore, water-blocking packers are needed: they can achieve mechanical sealing at a specific location in the oil well, separate the oil layer and the water layer, and prevent the flow of water;
[0003] Taking the compression packer as an example, the rubber cylinder is compressed to expand it and fit tightly against the well wall to form a physical barrier. When the packer is installed inside the oil well, the packer is hoisted into the oil well. The packer is prone to eccentricity inside the oil well. Due to the eccentricity, the contact between the packer and the inner wall of the oil well is uneven, resulting in uneven pressure distribution on the sealing surface. Some areas may not be able to form an effective seal, which greatly reduces the water-blocking effect. In the case of high-pressure water injection, water may leak from the poorly sealed parts and affect the normal production of the oil well. Utility Model Content
[0004] The utility model aims to provide a water plugging device for oil field production, so as to solve the defects mentioned in the background technology above, that is, the uneven contact between the packer and the inner wall of the oil well leads to uneven pressure distribution on the sealing surface; some areas may not be able to form an effective seal.
[0005] To achieve the above-mentioned purpose, a water plugging device for oil field production is provided, comprising a packer body, an oil pump is installed on the top of the packer body, and the oil pumping pipe on the oil pump passes through the packer body and is fixedly connected to the wire plug, and an oil pipe is installed at the bottom of the oil pumping pipe, and an upper water plugging air bag is installed on the outside of the packer body, and a lower water plugging air bag is installed on the lower side of the upper water plugging air bag, a first limit assembly is installed on the upper inner side of the packer body, and a second limit assembly is installed on the lower inner side of the packer body, and a servo electric cylinder is installed on the upper inner side of the packer body through a bracket, the first limit assembly includes a guide rod inserted into the side wall of the packer body, and a limit seat is fixedly installed on one end of the guide rod, and a driven block is fixedly installed on the other end of the guide rod, and the driven block is covered with a driving block, the limit seat is an arc structure made of metal material, and the limit seat is evenly arranged in three groups along the circumferential position of the outer wall surface of the packer body.
[0006] Preferably, the first position-limiting assembly and the second position-limiting assembly are synchronously driven by a servo electric cylinder, and the first position-limiting assembly and the second position-limiting assembly have the same composition structure.
[0007] Preferably, drive seats are provided on both the first limit assembly and the second limit assembly, and the two groups of drive seats are arranged in parallel, and the two groups of drive seats are fixed by shafts, and the piston rod end of the servo electric cylinder is fixedly connected to the surface of the drive seat.
[0008] Preferably, three groups of driving blocks are evenly installed on the outside of the driving seat, and the cross-sections of the driving blocks and the driven blocks at their bottom are both right-angled trapezoidal structures. At the same time, the driving blocks cover the force-bearing inclined surface on the surface of the driven blocks through the downward pressure inclined surface thereon, and the slopes of the downward pressure inclined surface and the force inclined surface are consistent.
[0009] Preferably, a spring is installed on the outer side of the guide rod, and the spring is arranged between the packer body and the driven block, and a guide hole matching the size of the guide rod is opened on the side wall of the packer body.
[0010] Preferably, an air source pipe is installed inside the packer body, and the air source pipe is connected to the upper water blocking airbag and the lower water blocking airbag respectively, and the upper water blocking airbag and the lower water blocking airbag are both annular structures made of PTFE material.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. The utility model completes the preliminary positioning of the packer body inside the oil well by reducing the distance between the end faces of the three groups of limit seats and the inner wall of the oil well; accurate positioning and fixing can ensure that the water plugging device is accurately placed at the position where the plugging is required, and the water flow is blocked to the greatest extent, thereby improving the effectiveness and accuracy of the plugging; in the complex environment of the oil well, the positioning and fixing can keep the water plugging device stable and not easily displaced by the impact and pressure change of the fluid in the oil well; then, the oil well is water-blocked by two groups of inflated upper water plugging airbags and lower water plugging airbags;
[0013] 2. The utility model injects gas into the interior of the upper water-blocking airbag and the lower water-blocking airbag, and the upper water-blocking airbag and the lower water-blocking airbag begin to expand, so that the expanded upper water-blocking airbag and the lower water-blocking airbag are in close contact with the inner wall of the oil well, so that the upper water-blocking airbag and the lower water-blocking airbag form two sealed water-isolating barriers, thereby improving the reliability and sealing performance during water blocking, and at the same time closely fitting with the well wall, separating specific areas of the oil well, preventing water from passing through, and ensuring the normal progress of oil extraction. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;
[0015] Figure 2 It is a top view of the structure of the utility model;
[0016] Figure 3 A bottom view of the structure of the utility model;
[0017] Figure 4 This is a schematic diagram of the first limit assembly of the structure of the utility model;
[0018] Figure 5 for Figure 4 Top view of the .
[0019] Numbers in the figure: 1. Packer body; 2. Oil pump; 3. Screw plug; 4. Oil pipe; 5. Servo electric cylinder; 6. First limit assembly; 61. Drive seat; 62. Drive block; 63. Driven block; 64. Guide rod; 65. Limit seat; 66. Spring; 7. Second limit assembly; 8. Upper water-blocking airbag; 9. Lower water-blocking airbag; 10. Air source pipe. DETAILED DESCRIPTION
[0020] See also Figure 1-5 The utility model provides a water plugging device for oil field production, comprising a packer body 1, an oil pump 2 is installed on the top of the packer body 1, and the oil pumping pipe on the oil pump 2 passes through the packer body 1 and is fixedly connected with the wire plug 3, while the oil pipe 4 is installed at the bottom of the oil pumping pipe, and an upper water plugging airbag 8 is installed on the outer side of the packer body 1, and a lower water plugging airbag 9 is installed on the lower side of the upper water plugging airbag 8, a first limit assembly 6 is installed on the upper side of the interior of the packer body 1, and a second limit assembly 6 is installed on the lower side of the interior of the packer body 1. Component 7, and at the same time, a servo electric cylinder 5 is installed on the upper inner side of the packer body 1 through a bracket, and the first limit component 6 includes a guide rod 64 inserted into the side wall of the packer body 1, and a limit seat 65 is fixedly installed at one end of the guide rod 64, and a driven block 63 is fixedly installed at the other end of the guide rod 64, and the driven block 63 is covered with a driving block 62, the limit seat 65 is an arc structure made of metal material, and the limit seat 65 is evenly arranged in three groups along the circumferential position of the outer wall surface of the packer body 1.
[0021] As a preferred implementation, the first position-limiting assembly 6 and the second position-limiting assembly 7 are synchronously driven by the servo electric cylinder 5 , and the first position-limiting assembly 6 and the second position-limiting assembly 7 have the same structure.
[0022] As a preferred embodiment, a drive seat 61 is provided on both the first limit assembly 6 and the second limit assembly 7, and the two groups of drive seats 61 are arranged in parallel. At the same time, the two groups of drive seats 61 are fixed by an axle rod, and the piston rod end of the servo electric cylinder 5 is fixedly connected to the surface of the drive seat 61.
[0023] As can be seen from the above, when in use, the setting of the first limiting assembly 6 and the second limiting assembly 7 can limit and guide the packer body 1 falling in the oil well, so that the packer body 1 will not tilt when moving inside the oil well. The working mode of the first limiting assembly 6 is consistent with that of the second limiting assembly 7. Here, only the working mode of the first limiting assembly 6 is described: the driving seat 61 moves downward under the drive of the servo electric cylinder 5, so that the downward pressing inclined surface on the driving block 62 presses the force-bearing inclined surface on the driven block 63, so that the driven block 63 moves upward and the spring 6 6 is pressed, and the preliminary positioning of the packer body 1 inside the oil well is completed by reducing the distance between the end faces of the three groups of limit seats 65 and the inner wall of the oil well; accurate positioning and fixing can ensure that the water blocking device is accurately placed at the position where it needs to be blocked, thereby blocking the water flow to the greatest extent and improving the effectiveness and accuracy of the blocking; in the complex environment of the oil well, positioning and fixing can keep the water blocking device stable and not easily displaced by the impact and pressure changes of the fluid in the oil well; then, the oil well is water-blocked by two groups of inflated upper water blocking airbags 8 and lower water blocking airbags 9.
[0024] As a preferred embodiment, three groups of driving blocks 62 are evenly installed on the outer side of the driving seat 61, and the cross-sections of the driving blocks 62 and the driven blocks 63 at the bottom are both right-angled trapezoidal structures. At the same time, the driving blocks 62 cover the force-bearing inclined surface on the surface of the driven blocks 63 through the downward pressure inclined surface thereon, and the slope of the downward pressure inclined surface is consistent with that of the force-bearing inclined surface.
[0025] As a preferred embodiment, a spring 66 is installed on the outside of the guide rod 64 , and the spring 66 is arranged between the packer body 1 and the driven block 63 . At the same time, a guide hole matching the size of the guide rod 64 is opened on the side wall of the packer body 1 .
[0026] As can be seen from the above, when in use, the operator places the device at a specific position inside the oil well through the hoisting setting. At this time, the external open pipe of the servo electric cylinder 5 is started remotely, and the piston rod of the servo electric cylinder 5 is extended; at this time, under the action of the driving block 62 and the driven block 63, the three groups of limit seats 65 outside the first limit assembly 6 and the second limit assembly 7 move outward synchronously, and the three groups of limit seats 65 extend and contact the inner wall surface of the oil well, so that the device and the oil well are in a concentric circle state, and finally the device is started. The switch of the external air pump connected to the air source pipe 10 allows the gas to enter the upper water-blocking airbag 8 and the lower water-blocking airbag 9, and the upper water-blocking airbag 8 and the lower water-blocking airbag 9 begin to expand, so that the expanded upper water-blocking airbag 8 and the lower water-blocking airbag 9 are in close contact with the inner wall of the oil well, so that the upper water-blocking airbag 8 and the lower water-blocking airbag 9 form two sealed water-proof barriers, which improve the reliability and sealing performance when blocking water, and at the same time closely fit with the well wall, separate the specific area of the oil well, prevent water from passing through, and ensure the normal progress of oil extraction;
[0027] As a preferred embodiment, an air source pipe 10 is installed inside the seal body 1, and the air source pipe 10 is connected to the upper water blocking airbag 8 and the lower water blocking airbag 9 respectively. At the same time, the upper water blocking airbag 8 and the lower water blocking airbag 9 are both annular structures made of PTFE material.
[0028] Working principle: When in use, the device is placed at a specific position inside the oil well using a hoisting device. At this time, the external open pipe of the servo electric cylinder 5 is started remotely, and the piston rod of the servo electric cylinder 5 is extended. At this time, under the action of the driving block 62 and the driven block 63, the three groups of limit seats 65 outside the first limit assembly 6 and the second limit assembly 7 move outward synchronously, and the three groups of limit seats 65 extend and contact the inner wall surface of the oil well, so that the device and the oil well are in a concentric circle state. Finally, the connection with the gas source pipe 1 is started. 0, so that the gas enters the upper water-blocking airbag 8 and the lower water-blocking airbag 9, and the upper water-blocking airbag 8 and the lower water-blocking airbag 9 begin to expand, so that the expanded upper water-blocking airbag 8 and the lower water-blocking airbag 9 are in close contact with the inner wall of the oil well, so that the upper water-blocking airbag 8 and the lower water-blocking airbag 9 form two sealed water-proof barriers, which improve the reliability and sealing performance when blocking water, and at the same time fit closely with the well wall, separate the specific area of the oil well, prevent water from passing through, and ensure the normal progress of oil extraction; the first limit component 6 and The second limit assembly 7 is provided to limit and guide the packer body 1 falling in the oil well, so that the packer body 1 will not tilt when moving inside the oil well. The working mode of the first limit assembly 6 is consistent with that of the second limit assembly 7. Here, only the working mode of the first limit assembly 6 is described: the driving seat 61 moves downward under the drive of the servo electric cylinder 5, so that the downward pressing inclined surface on the driving block 62 presses the force-bearing inclined surface on the driven block 63, so that the driven block 63 moves upward and presses the spring 66, thereby lowering the driven block 63. The spacing between the end faces of the lower three groups of limit seats 65 and the inner wall of the oil well completes the preliminary positioning of the packer body 1 inside the oil well; accurate positioning and fixation can ensure that the water blocking device is accurately placed at the position where it needs to be blocked, thereby blocking the water flow to the greatest extent and improving the effectiveness and accuracy of the blockage; in the complex environment of the oil well, positioning and fixation can keep the water blocking device stable and not easily displaced by the impact and pressure changes of the fluid in the oil well; then, two groups of inflated upper water blocking airbags 8 and lower water blocking airbags 9 are used to isolate the oil well.
Claims
1. A water plugging device for oil field production, comprising a packer body (1), characterized in that: An oil pump (2) is installed on the top of the packer body (1), and a pumping pipe on the oil pump (2) passes through the packer body (1) and is fixedly connected to a plug (3), while an oil pipe (4) is installed at the bottom of the pumping pipe, and an upper water blocking airbag (8) is installed on the outer side of the packer body (1), and a lower water blocking airbag (9) is installed on the lower side of the upper water blocking airbag (8), a first limit assembly (6) is installed on the upper side of the interior of the packer body (1), and a second limit assembly (7) is installed on the lower side of the interior of the packer body (1), and the packer body (1) is provided with a plurality of oil pumps (2). ) is mounted on the inner upper side of the packer body (1) via a bracket, the first limit assembly (6) comprises a guide rod (64) inserted into the side wall of the packer body (1), and a limit seat (65) is fixedly mounted on one end of the guide rod (64), and a driven block (63) is fixedly mounted on the other end of the guide rod (64), and the driven block (63) is covered with a driving block (62), the limit seat (65) is an arc structure made of metal material, and three groups of limit seats (65) are evenly arranged along the circumferential position of the outer wall surface of the packer body (1).
2. The water plugging device for oil field production according to claim 1, characterized in that: The first position-limiting assembly (6) and the second position-limiting assembly (7) are synchronously driven by a servo electric cylinder (5), and the first position-limiting assembly (6) and the second position-limiting assembly (7) have the same composition structure.
3. The water plugging device for oil field production according to claim 2, characterized in that: A driving seat (61) is provided on both the first limiting assembly (6) and the second limiting assembly (7), and the two groups of driving seats (61) are arranged in parallel. The two groups of driving seats (61) are fixed by a shaft, and the piston rod end of the servo electric cylinder (5) is fixedly connected to the surface of the driving seat (61).
4. The water plugging device for oil field production according to claim 3, characterized in that: Three groups of driving blocks (62) are evenly installed on the outer side of the driving seat (61), and the cross-sections of the driving blocks (62) and the driven blocks (63) at their bottoms are both right-angled trapezoidal structures. At the same time, the driving blocks (62) cover the force-bearing inclined surface on the surface of the driven blocks (63) through the downward pressure inclined surface thereon, and the slopes of the downward pressure inclined surface and the force-bearing inclined surface are consistent.
5. The water plugging device for oil field production according to claim 1, characterized in that: A spring (66) is installed on the outer side of the guide rod (64), and the spring (66) is arranged between the packer body (1) and the driven block (63). At the same time, a guide hole matching the size of the guide rod (64) is opened on the side wall of the packer body (1).
6. The water plugging device for oil field production according to claim 1, characterized in that: An air source pipe (10) is installed inside the packer body (1), and the air source pipe (10) is connected to an upper water blocking air bag (8) and a lower water blocking air bag (9) respectively. Meanwhile, the upper water blocking air bag (8) and the lower water blocking air bag (9) are both annular structures made of PTFE material.