Oil field water injection valve

Abstract

The utility model relates to an oilfield water injection valve and belongs to the technical field of valves. The utility model discloses a direct current gear motor, its structural characteristics are: also include the valve body, bi-directional screw, lower press block, upper press block and valve core, be equipped with the valve cavity in the valve body, lower press block, upper press block and valve core all are installed in the valve cavity, and the valve core is located the lower press block and upper press block, and the two-way screw is connected with the two-way screw. A motor shaft of the direct-current gear motor is connected with one end of the two-way screw rod, the other end of the two-way screw rod is installed in the valve cavity through a bearing, and the lower pressing block and the upper pressing block are both matched with the two-way screw rod. The valve element comprises an inner pipe, the inner pipe is located between the lower pressing block and the upper pressing block, the inner pipe is made of rubber, two layers of high-strength nylon mesh cloth are arranged in the inner pipe, the two ends of the inner pipe are installed at the two ends of the valve body through end covers, the inner pipe is sleeved with an outer sleeve, the outer sleeve is made of rubber, and the inner pipe is sleeved with the outer sleeve. A layer of high-strength nylon mesh cloth and a layer of steel wire mesh cloth are arranged in the outer sleeve.

Description

Technical Field

[0001] The utility model relates to an oil field water injection valve, belonging to the technical field of valves. Background Art

[0002] After an oil field is put into development, as the exploitation time increases, the energy of the oil layer itself will be continuously consumed, causing the oil layer pressure to continuously drop, a large amount of underground crude oil to be degassed, the viscosity to increase, the oil well production to be greatly reduced, and even the spraying and production will stop, resulting in a large amount of dead oil remaining underground that cannot be extracted. In order to make up for the underground deficit caused by the extraction of crude oil, maintain or increase the oil layer pressure, achieve high and stable production of the oil field, and obtain a higher recovery rate, the oil field must be injected with water, and the injection of water into the oil field needs to be controlled by valves.

[0003] In view of this, the patent document with application number 201120444212.0 discloses an integrated valve body for oil field production, water injection and gathering and transportation system control valves. The valves in the above-mentioned prior art are multi-channel structures, which not only require the laying of multiple pipelines and occupy a large area, but also have high requirements on the coordination, accuracy and speed of the valve control equipment, and have high cost of use. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide an oilfield water injection valve with a reasonable structural design.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: the oilfield water injection valve includes a DC reduction motor, and its structural characteristics are: it also includes a valve body, a bidirectional screw, a lower pressure block, an upper pressure block and a valve core, the valve body is provided with a valve cavity, the lower pressure block, the upper pressure block and the valve core are all installed in the valve cavity, and the valve core is located between the lower pressure block and the upper pressure block, the motor shaft of the DC reduction motor is connected to one end of the bidirectional screw, and the lower pressure block and the upper pressure block are both matched with the bidirectional screw.

[0006] Furthermore, the other end of the bidirectional screw is installed in the valve cavity through a bearing.

[0007] Furthermore, the valve core includes an inner tube, the inner tube is located between the lower pressing block and the upper pressing block, the material of the inner tube is rubber, and two layers of high-strength nylon mesh are arranged in the inner tube.

[0008] Furthermore, two ends of the inner tube are mounted on two ends of the valve body through end covers.

[0009] Furthermore, the inner tube is covered with an outer sleeve, the outer sleeve is made of rubber, and the outer sleeve contains a layer of high-strength nylon mesh and a layer of steel wire mesh.

[0010] Furthermore, a protrusion is provided on the lower pressing block, and a groove is provided on the upper pressing block. The groove cooperates with the protrusion, upper slopes are provided on both sides of the groove, and lower slopes are provided on both sides of the protrusion.

[0011] Furthermore, the DC reduction motor is mounted on a motor mounting plate, and a rubber pad is installed between the motor mounting plate and the valve body.

[0012] Furthermore, a motor cover is installed on the valve body, an O-ring is installed between the valve body and the motor cover, and the DC reduction motor is located in the motor cover.

[0013] Furthermore, a heat-insulating layer is installed in the motor cover.

[0014] Furthermore, a displacement sensor seat is installed on the valve body, a displacement sensor is provided on the upper pressure block, and the displacement sensor cooperates with the displacement sensor seat.

[0015] Furthermore, the bidirectional screw is respectively provided with positive and negative threads, the lower pressing block is connected to the bidirectional screw by positive threads, and the upper pressing block is connected to the bidirectional screw by negative threads, or the lower pressing block is connected to the bidirectional screw by negative threads, and the upper pressing block is connected to the bidirectional screw by positive threads.

[0016] Compared with the prior art, the utility model has the following advantages: the oilfield water injection valve can directly connect the motor shaft of the DC reduction motor with the bidirectional screw, thereby reducing the height of the entire valve. When in use, the DC reduction motor drives the bidirectional screw to rotate, and the bidirectional screw causes the lower pressure block and the upper pressure block to move synchronously to achieve the clamping or loosening of the valve core, thereby achieving the opening and closing control of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the oilfield water injection valve according to an embodiment of the utility model.

[0018] Figure 2 It is a left-side structural schematic diagram of an oilfield water injection valve according to an embodiment of the utility model.

[0019] Figure 3 It is a schematic diagram of the top structure of the upper pressing block of the embodiment of the utility model.

[0020] Figure 4 It is a schematic diagram of the main structure of the upper pressing block of an embodiment of the utility model.

[0021] Figure 5 yes Figure 4 Schematic diagram of the AA section structure.

[0022] Figure 6 It is a schematic diagram of the top view of the lower pressing block of an embodiment of the utility model.

[0023] Figure 7 It is a schematic diagram of the main structure of the lower pressing block of an embodiment of the utility model.

[0024] Figure 8 yes Figure 7 Schematic diagram of the BB cross-section structure.

[0025] Fig. 9 It is a schematic diagram of the main structure of the cooperation between the lower pressing block and the upper pressing block of the embodiment of the utility model.

[0026] Fig.10 It is a left-side structural schematic diagram of the cooperation between the lower pressing block and the upper pressing block of an embodiment of the utility model.

[0027] Fig.11 It is a schematic diagram of the main structure of the inner tube of an embodiment of the utility model.

[0028] Fig.12 It is a schematic diagram of the main structure of a coat according to an embodiment of the utility model.

[0029] In the figure: valve body 1, bidirectional screw 2, lower pressure block 3, upper pressure block 4, end cover 5, inner tube 6, outer sleeve 7, rubber pad 8, motor mounting plate 9, displacement sensor seat 10, motor cover 11, bearing 12, DC reduction motor 13, displacement sensor 14, O-ring 15, groove 16, protrusion 17, valve cavity 18, valve core 19, upper slope 20, lower slope 21. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0031] Example

[0032] See also Figures 1 to 12 As shown, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the utility model.

[0033] The oilfield water injection valve in this embodiment includes a valve body 1, a bidirectional screw 2, a lower pressure block 3, an upper pressure block 4, a DC reduction motor 13 and a valve core 19. A valve cavity 18 is provided in the valve body 1. The lower pressure block 3, the upper pressure block 4 and the valve core 19 are all installed in the valve cavity 18, and the valve core 19 is located between the lower pressure block 3 and the upper pressure block 4. The motor shaft of the DC reduction motor 13 is connected to one end of the bidirectional screw 2, and the other end of the bidirectional screw 2 is installed in the valve cavity 18 through a bearing 12.

[0034] The lower pressing block 3 and the upper pressing block 4 in this embodiment are both matched with the bidirectional screw 2, and the bidirectional screw 2 is respectively provided with positive and negative threads. The lower pressing block 3 is connected to the bidirectional screw 2 by positive threads, and the upper pressing block 4 is connected to the bidirectional screw 2 by negative threads, or the lower pressing block 3 is connected to the bidirectional screw 2 by negative threads, and the upper pressing block 4 is connected to the bidirectional screw 2 by positive threads.

[0035] The valve core 19 in this embodiment includes an inner tube 6, which is located between the lower pressure block 3 and the upper pressure block 4. The material of the inner tube 6 is rubber, and two layers of high-strength nylon mesh are arranged inside the inner tube 6. The two ends of the inner tube 6 are installed on the two ends of the valve body 1 through the end covers 5. The inner tube 6 is covered with an outer sleeve 7, and the material of the outer sleeve 7 is rubber. There is a layer of high-strength nylon mesh and a layer of steel wire mesh inside the outer sleeve 7. The inner tube 6 and the outer sleeve 7 must have the characteristics of extremely strong toughness, wear resistance, and extremely high folding resistance. The valve core 19 can also include only the inner tube 6 without the outer sleeve 7, but a nylon mesh is arranged on the wall of the inner tube 6.

[0036] In this embodiment, a protrusion 17 is provided on the lower pressing block 3, and a groove 16 is provided on the upper pressing block 4. The groove 16 cooperates with the protrusion 17, and upper slopes 20 are provided on both sides of the groove 16. Lower slopes 21 are provided on both sides of the protrusion 17. The protrusion 17 cooperates with the groove 16 to clamp the valve core 19 and close it. The upper slope 20 and the upper slope 20 can expand the valve core 19 after clamping, so as to avoid the valve core 19 from being flattened on both sides of the clamping position of the valve core 19 after the protrusion 17 and the groove 16 clamp the valve core 19, so as to avoid the valve core 19 from bursting.

[0037] The DC reduction motor 13 in this embodiment is installed on the motor mounting plate 9, and a rubber pad 8 is installed between the motor mounting plate 9 and the valve body 1. The rubber pad 8 can seal the valve body 1 to prevent liquid from flowing into the motor cover 11 when the valve core 19 bursts.

[0038] A motor cover 11 is installed on the valve body 1 in this embodiment, an O-ring 15 is installed between the valve body 1 and the motor cover 11, the DC reduction motor 13 is located in the motor cover 11, the O-ring 15 can prevent external liquid from flowing into the motor cover 11, and an insulation layer is installed in the motor cover 11. The insulation layer can be an electric heating device or an insulation material, which can ensure that a certain temperature is maintained in the motor cover 11.

[0039] In this embodiment, a displacement sensor seat 10 is installed on the valve body 1, and a displacement sensor 14 is provided on the upper pressure block 4. The displacement sensor 14 cooperates with the displacement sensor seat 10. The displacement sensor 14 can control the moving distance of the upper pressure block 4 and the lower pressure block 3, so as to conveniently control the opening and closing of the valve.

[0040] Specifically, the oilfield water injection valve can be used for oilfield water injection. When in use, the two ends of the valve core 19 are connected to the system. When working, the two bidirectional screws 2 are driven by two DC reduction motors 13. Since the bidirectional screw 2 is provided with positive and negative threads, the bidirectional screw 2 is connected to the upper pressure block 4 and the lower pressure block 3 respectively by positive, negative or negative, positive threads, so that the lower pressure block 3 and the upper pressure block 4 can be moved synchronously. When the lower pressure block 3 moves upward and the upper pressure block 4 moves downward, the valve core 19 can be clamped by the lower pressure block 3 and the upper pressure block 4 to close the valve. When the lower pressure block 3 moves downward and the upper pressure block 4 moves upward, the valve core 19 can be loosened by the lower pressure block 3 and the upper pressure block 4 to open the valve. When a DC reduction motor 13 is used for driving, the power of the DC reduction motor 13 needs to be transmitted to the two bidirectional screws 2 through gear transmission.

[0041] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. An oilfield water injection valve, comprising a DC reduction motor (13), characterized in that: The invention also comprises a valve body (1), a bidirectional screw (2), a lower pressing block (3), an upper pressing block (4) and a valve core (19); a valve cavity (18) is arranged in the valve body (1); the lower pressing block (3), the upper pressing block (4) and the valve core (19) are all installed in the valve cavity (18); and the valve core (19) is located between the lower pressing block (3) and the upper pressing block (4); the motor shaft of the DC reduction motor (13) is connected to one end of the bidirectional screw (2); and the lower pressing block (3) and the upper pressing block (4) are both matched with the bidirectional screw (2).

2. The oilfield water injection valve according to claim 1, characterized in that: The other end of the bidirectional screw (2) is mounted in the valve chamber (18) via a bearing (12).

3. The oilfield water injection valve according to claim 1, characterized in that: The valve core (19) comprises an inner tube (6), and the inner tube (6) is located between the lower pressing block (3) and the upper pressing block (4).

4. The oilfield water injection valve according to claim 3, characterized in that: The two ends of the inner tube (6) are mounted on the two ends of the valve body (1) through end covers (5).

5. The oilfield water injection valve according to claim 3, characterized in that: The inner tube (6) is covered with an outer sleeve (7).

6. The oilfield water injection valve according to claim 1, characterized in that: The lower pressing block (3) is provided with a protrusion (17), and the upper pressing block (4) is provided with a groove (16), and the groove (16) cooperates with the protrusion (17).

7. The oilfield water injection valve according to claim 1, characterized in that: The DC reduction motor (13) is mounted on a motor mounting plate (9), and a rubber pad (8) is mounted between the motor mounting plate (9) and the valve body (1).

8. The oilfield water injection valve according to claim 1, characterized in that: A motor cover (11) is mounted on the valve body (1), an O-ring (15) is mounted between the valve body (1) and the motor cover (11), and the DC reduction motor (13) is located inside the motor cover (11).

9. The oilfield water injection valve according to claim 8, characterized in that: A thermal insulation layer is installed inside the motor cover (11).

10. The oilfield water injection valve according to claim 1, characterized in that: A displacement sensor seat (10) is installed on the valve body (1), a displacement sensor (14) is provided on the upper pressure block (4), and the displacement sensor (14) cooperates with the displacement sensor seat (10).

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