An on-line pressure taker for water injection wells

Abstract

The present disclosure relates to an online pressure taker of a water injection well, comprising: a main body adapter pipe (3) which is adapted to the wellhead pipeline of the water injection well, two sides of the main body adapter pipe (3) are respectively provided with side wings, and a first flow channel and a second flow channel which are in communication with the main body adapter pipe (3) are respectively arranged in the side wings; the first flow channel is connected with a pressure control valve (2) and a pressure transmitter (1); the second flow channel is connected with a standard gauge (4); the central passage of the pressure control valve (2) and the inner diameters of the first flow channel and the second flow channel are obviously smaller than the inner diameter of the main body adapter pipe (3); when high-pressure water passes through the main pipeline, a part of the water flow enters the pressure control valve through the first and second flow channels, because the first block of the pressure control valve is almost hidden in the valve body wall, the direct impact of the high-pressure water on the first block is effectively avoided, so that the damage of the high-pressure water to the pressure control valve and the replacement frequency of the pressure control valve are greatly reduced.

Description

Technical Field

[0001] This disclosure relates to the field of oilfield production technology, specifically to an online pressure tapping device for water injection wells. Background Technology

[0002] The statements in this section provide only background information in connection with this disclosure and do not constitute prior art.

[0003] Water injection wells operate at high pressures (generally above 13 MPa), and the injected water is highly corrosive and contains many impurities, such as... Figure 1 As shown, during operation, the online pressure taps in water injection wells are subjected to long-term direct impact from high-pressure water, leading to valve stem deformation, valve seat wear, and corrosion. This can cause the online pressure taps to fail to close properly. Statistics show that out of 100 water injection wells, 10%-20% require replacement of the online sampler due to valve stem and seat deformation and corrosion. Furthermore, because the online pressure taps are welded to the pipeline below the water injection control valve, replacement requires depressurization, venting, welding, and tanker truck coordination, making the operation cumbersome. This results in prolonged well downtime and high labor intensity for operators. If the process valves in the water injection well fail to close properly, the main water injection line must be shut down, affecting the normal production of other wells in the same pipeline. Additionally, online samplers are prone to freezing and blockage when the ambient temperature drops below 0°C, leading to inaccurate pressure data. These problems increase maintenance costs for oilfield water injection wells, increase the labor intensity of employees, make water injection well management more difficult, result in inaccurate underground analysis data, and reduce crude oil production.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] In view of this, this disclosure provides an online pressure tap for water injection wells, which solves the problems that conventional online pressure taps for water injection wells are prone to valve stem deformation, valve seat wear, corrosion and other issues caused by long-term direct impact of high-pressure water during operation, thus requiring frequent replacement.

[0006] To achieve the above-mentioned objective, the online pressure tapping device for water injection wells includes: The main body connecting pipe is connected to the wellhead pipeline of the water injection well. Side wings are provided on both sides of the main body connecting pipe. A first drainage channel and a second drainage channel connected to the main body connecting pipe are respectively provided in the side wings. The first drainage channel is connected to a pressure control valve, and the pressure control valve is connected to a pressure transmitter; the second drainage channel is connected to a standard gauge. The inner diameter of the central channel of the pressure control valve and the inner diameter of the first and second drainage channels are significantly smaller than the inner diameter of the main body connecting pipe.

[0007] In this disclosure and possible embodiments, one end of the central channel of the pressure control valve is connected to the pressure transmitter, and the other end is connected to a first plug, which is used to cut off or connect the pressure transmitter and the first drainage channel.

[0008] In this disclosure and possible embodiments, the second drainage channel is connected to the standard table via a connection short circuit; The connection is short-circuited to provide a fluid flow channel. The pressure tap of the standard gauge is connected to the second drainage channel through the fluid flow channel. The other end of the fluid flow channel is connected to a second plug, which is used to cut off or connect the standard gauge and the second drainage channel.

[0009] In this disclosure and possible embodiments, the pressure control valve and the pressure transmitter Anti-theft retaining rings are installed at the connection points of the device.

[0010] In this disclosure and possible embodiments, the first plug is threadedly connected to the center channel of the pressure control valve.

[0011] In this disclosure and possible embodiments, the second plug is threadedly connected to the fluid flow channel of the connection short circuit.

[0012] In this disclosure and possible embodiments, the ends of the first block and the second block are provided with hexagonal structures, and a rotational force is applied to the first block or the second block by means of the hexagonal structures.

[0013] In this disclosure and possible embodiments, a pressure cap is provided on the outer side of the hexagonal structure.

[0014] The beneficial effects of this invention are as follows: The aforementioned online pressure tapping device for water injection wells includes a main connecting pipe that connects to the wellhead pipeline of the water injection well. Side wings are provided on both sides of the main connecting pipe, and first and second drainage channels, respectively, are provided within the side wings and communicate with the main connecting pipe. The first drainage channel connects to a pressure control valve and a pressure transmitter; the second drainage channel connects to a standard gauge. The inner diameter of the central channel of the pressure control valve and the inner diameter of the first and second drainage channels are significantly smaller than the inner diameter of the main connecting pipe. When high-pressure water passes through the main pipeline, a portion of the water flows through the first and second drainage channels into the pressure control valve. Because the first blockage of the pressure control valve is almost hidden within its valve body wall, the direct impact of high-pressure water on the first blockage is effectively avoided, thereby significantly reducing the damage to the pressure control valve caused by high-pressure water and the frequency of its replacement. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0016] Figure 1 This is a schematic diagram of the structure of the online pressure tapping device for water injection wells described in the background art; Figure 2 This is a schematic diagram of the structure of the online pressure tapping device for water injection wells according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the online pressure tapping device for water injection wells according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the online pressure tapping device for water injection wells described in an embodiment of the present invention. Detailed Implementation

[0017] The present disclosure is described below based on embodiments; however, it is worth noting that the present disclosure is not limited to these embodiments. In the detailed description of the present disclosure below, certain specific details are described in detail. However, those skilled in the art will fully understand the present disclosure for the parts not described in detail.

[0018] Furthermore, unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to."

[0019] like Figures 2-4 As shown in the embodiment of this disclosure, the online pressure tapping device for water injection wells includes a main body connecting pipe 3, which is connected to the wellhead pipeline of the water injection well. Side wings are respectively provided on the left and right sides of the main body connecting pipe 3. A first drainage channel 11 and a second drainage channel communicating with the main body connecting pipe 3 are respectively provided in the two side wings. The diameter of the first drainage channel 11 is significantly smaller than the inner diameter of the main body connecting pipe 3. One of the first drainage channels 11 is connected to the central channel of the pressure control valve 2. The main body connecting pipe 3 is connected to the pressure transmitter 1 through the pressure control valve 2. The second drainage channel is used for pressure tapping of the standard gauge 4.

[0020] In this embodiment, the pressure control valve 2 includes a valve body. One end of the central channel of the valve body is threaded to a pressure transmitter 1, and the other end is threaded to a first plug 21. The first plug 21 moves axially along the central channel of the valve body and is used to cut off or connect the pressure tapping port of the pressure transmitter 1 with the first drainage channel 11. Since the diameters of the first drainage channel 11 and the central channel of the valve body are significantly smaller than the inner diameter of the main body connecting pipe 3, when the pressure control valve 2 is open, the first plug 21 is essentially hidden inside the side wall of the valve body and is not exposed to the full impact of high-pressure water.

[0021] and Figure 1 Compared to conventional online pressure taps for water injection wells, the online pressure tap of this disclosure removes the pressure control valve 2 from the wellhead pipeline (main pipeline). When high-pressure water flows through the main pipeline, a portion of the water flows through the first drainage channel 11 on the side of the main body connecting pipe 3 into the pressure transmitter 1 connected to the pressure control valve 2 to record the pressure. Because the first blockage 21 of the pressure control valve 2 is almost hidden in its valve body wall, when the pressure control valve 2 is opened, the first blockage 21 simultaneously retracts into the valve body wall, thereby effectively preventing high-pressure water from directly impacting the first blockage 21 inside the pressure control valve 2, significantly reducing the occurrence of damage caused by high-pressure water, and achieving the purpose of reducing the replacement frequency.

[0022] In this embodiment, an anti-theft retaining ring 5 is provided at the connection between the pressure control valve 2 and the pressure transmitter 1. The anti-theft retaining ring 5 protects the turning end of the pressure transmitter 1. Only after the anti-theft retaining ring 5 is damaged can a wrench or similar tool be used to apply rotational torque to the turning end of the pressure transmitter 1, thereby achieving the anti-theft function.

[0023] In this embodiment of the disclosure, the second drainage channel is connected to the standard table 4 via a connection short circuit 6. exist Figure 4 In the process, the connecting short circuit 6 is provided with a liquid flow channel, and the pressure tap of the standard gauge 4 is connected to the liquid flow channel. The other end of the liquid flow channel is connected to the second plug 61. The connection between the pressure tap of the standard gauge 4 and the liquid flow channel and the first drainage channel 11 is cut off or opened through the second plug 61, so as to perform pressure tapping or closing of the standard gauge 4.

[0024] exist Figure 4 In this process, the connecting short connector 6 is threadedly connected to the side wing of the main body connecting pipe 3, and a sealing ring is provided on the connection surface of the two so that the angle of the standard gauge 4 can be adjusted 360° by adjusting the threaded connection, so that the dial of the standard gauge 4 is in a position that is easy to observe.

[0025] In this embodiment of the disclosure, by Figure 4As shown, the first plug 21 is threadedly connected to the central channel of the pressure control valve 2, and the second plug 61 is threadedly connected to the fluid flow channel of the connecting short circuit 6. The ends of the first plug 21 and the second plug 61 are provided with hexagonal structures. By applying a rotational force to the hexagonal structures, the first plug 21 or the second plug 61 can be moved axially along their respective channels, used to cut off or connect the pressure transmitter 1 or the standard gauge 4 to the first and second drainage channels respectively. Furthermore, to protect the threaded structures of the first plug 21 and the second plug 61, a pressure cap is provided on the outside of the hexagonal structure.

[0026] Of course, the first blockage 21 and the second blockage 61 can also adopt other structural forms, and the present invention does not impose any particular restrictions on them.

[0027] The working process of the online pressure tapping device for water injection wells described in the embodiments of this disclosure is described below: The online pressure tapping device for water injection wells can operate normally after connecting the main body connecting pipe 3 to the wellhead pipeline. During operation, the pressure transmitter 1 is installed on the pressure control valve 2, and the anti-theft retaining ring 5 protects the turning end of the pressure transmitter 1, thus preventing theft. High-pressure water from the water injection well can enter the pressure control valve 2 and the online standard gauge 4 through the first drainage channel 11 in the left and right wings of the main body connecting pipe 3, respectively. After opening the first plug 21 of the pressure control valve 2 below the pressure transmitter 1 with a wrench, the pressure transmitter 1 can start to work, record pressure data, and transmit it. When checking the gauge, after installing the standard gauge 4 on the main body connecting pipe 3 through the connecting short 6, the threaded connection position of the connecting short 6 is manually adjusted so that the standard gauge 4 is in a position where the pressure value can be easily observed. Then, the second plug 61 is opened, and the standard gauge 4 can start to work.

[0028] In summary, the online pressure tapping device for water injection wells described in this embodiment is an integrated upgrade and improvement of the conventional online pressure tapping device for water injection wells. Building upon the conventional online pressure tapping device's ability to only record water injection well pressure data, it adds an online gauge checking function, and designs an anti-theft function for the pressure transmitter (pressure gauge) and a standard gauge angle adjustment function. Furthermore, the installation and shut-off method of the pressure control valve is changed, adopting a concealed switch design. Moreover, the entire device is designed with high-strength tempering treatment and an anti-corrosion coating to increase pressure resistance and corrosion resistance.

[0029] Therefore, compared with conventional online pressure taps for water injection wells, the online pressure tap for water injection wells described in this embodiment has the advantages of online pressure tapping, online gauge inspection, corrosion resistance, wear resistance, and high pressure resistance.

[0030] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An online pressure tapping device for water injection wells, characterized in that, include: The main body connecting pipe (3) is connected to the wellhead pipeline of the water injection well. Side wings are provided on both sides of the main body connecting pipe (3). A first drainage channel and a second drainage channel connected to the main body connecting pipe (3) are respectively provided in the side wings. The first drainage channel is connected to a pressure control valve (2), and the pressure control valve (2) is connected to a pressure transmitter (1); the second drainage channel is connected to a standard gauge (4); The inner diameter of the central channel of the pressure control valve (2) and the inner diameter of the first and second drainage channels are significantly smaller than the inner diameter of the main body connecting pipe (3).

2. The online pressure tapping device for water injection wells according to claim 1, characterized in that: One end of the central channel of the pressure control valve (2) is connected to the pressure transmitter (1), and the other end is connected to the first plug (21). The first plug (21) is used to cut off or connect the pressure transmitter (1) and the first drainage channel.

3. The online pressure tapping device for water injection wells according to claim 1 or 2, characterized in that: The second drainage channel is connected to the standard table (4) via a connection short (6); The connection short circuit (6) is provided with a liquid flow channel. The pressure tap of the standard meter (4) is connected to the second drainage channel through the liquid flow channel. The other end of the liquid flow channel is connected to a second plug (61). The second plug (61) is used to cut off or connect the standard meter (4) and the second drainage channel.

4. The online pressure tapping device for water injection wells according to claim 3, characterized in that: An anti-theft retaining ring (5) is provided at the connection between the pressure control valve (2) and the pressure transmitter (1).

5. The online pressure tapping device for water injection wells according to claim 1, 2, or 4, characterized in that: The first plug (21) is threadedly connected to the center channel of the pressure control valve (2).

6. The online pressure tapping device for water injection wells according to claim 5, characterized in that: The second plug (61) is threadedly connected to the fluid flow channel of the connection short (6).

7. The online pressure tapping device for water injection wells according to claim 6, characterized in that: The ends of the first block (21) and the second block (61) are provided with hexagonal structures, and a rotational force is applied to the first block (21) or the second block (61) by means of the hexagonal structures.

8. The online pressure tapping device for water injection wells according to claim 7, characterized in that: A pressure cap is provided on the outer side of the hexagonal structure.

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