High pressure water injection gate

Abstract

The present application relates to the technical field of oil exploitation water injection, and more particularly to a high-pressure water injection gate to alleviate the problems of existing high-pressure gates, such as difficult opening and closing, difficult maintenance, and easy to cause oil well production reduction. The device comprises a first chamber and a second chamber arranged in the main body, and a first valve body arranged in the first chamber and a second valve body arranged in the second chamber; the lower part of the first chamber and the second chamber is communicated through a horizontally arranged first pipeline; the first valve body and the second valve body can independently control the on-off of the gate high-pressure water channel. The U-shaped high-pressure water channel design effectively alleviates the impact of high-pressure water flow on the first valve body, facilitating the opening and closing of the staff; when the first valve body needs to be repaired, closing the second valve body can block the high-pressure water channel, without the need to close the entire water supply pipeline, facilitating timely recovery of production.

Description

Technical Field

[0001] This invention relates to the field of water injection technology in oil extraction, and in particular to a high-pressure water injection gate. Background Technology

[0002] In oil extraction, water injection is an important secondary oil recovery method, widely used to enhance crude oil recovery. The basic principle of water injection is to inject water into the formation to increase formation pressure, thereby driving crude oil towards the wellhead. However, as water injection progresses, the pressure differences between individual wells gradually increase, posing numerous challenges to the stable operation of the water injection system.

[0003] First, opening and closing water injection gates becomes more difficult under high pressure. As the water injection pressure increases, the required torque also increases. This means that in some situations, operators may face significant physical pressure and technical difficulties when opening or closing the gates, potentially leading to equipment damage or operational errors and increasing safety hazards.

[0004] Secondly, under high-pressure conditions, water injection gates are susceptible to erosion, leading to internal leakage or incomplete closure. These problems not only affect water injection efficiency but may also cause fluctuations in the formation waterline, negatively impacting the overall oilfield's production efficiency. Frequent damage and internal leakage of the water injection gates significantly increase the frequency of equipment maintenance and replacement, thus consuming substantial human and material resources.

[0005] To ensure the safety of personnel and avoid injuries under high pressure, the entire water injection system is usually shut down during maintenance. While this measure protects operators, it also has significant side effects: stopping the water supply can cause the formation waterline to drop rapidly, thereby affecting the overall production of the well group and causing economic losses.

[0006] In summary, existing water injection gates are prone to damage and pose significant safety hazards during maintenance. Summary of the Invention

[0007] This invention provides a high-pressure water injection gate to alleviate the problems of existing high-pressure gates, such as difficulty in opening and closing, difficulty in maintenance, and easy reduction in oil well production.

[0008] To alleviate the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0009] The present invention provides a high-pressure water injection gate, comprising a first chamber and a second chamber disposed within a main body, and a first valve body disposed within the first chamber and a second valve body disposed within the second chamber;

[0010] The lower parts of the first chamber and the second chamber are connected by a horizontally arranged first pipe;

[0011] The first valve body and the second valve body can independently control the opening and closing of the high-pressure water channel of the gate.

[0012] Furthermore,

[0013] The first chamber and the second chamber are arranged parallel to each other in the vertical direction;

[0014] A water outlet is provided at the end of the first chamber that is furthest from the second chamber;

[0015] A water inlet is provided at the end of the second chamber that is furthest from the first chamber;

[0016] Both the outlet and inlet are located above the first pipeline;

[0017] The inlet, the second valve body, the first pipeline, the first valve body and the outlet are connected in sequence to form a high-pressure waterway.

[0018] Furthermore,

[0019] The first valve body includes a sleeve cap, a sleeve, a first valve core, a first valve stem, and a first cap;

[0020] The sleeve cap and sleeve are inserted into the first chamber from top to bottom;

[0021] The first valve core is inserted into the sleeve;

[0022] The first valve stem is inserted into the sleeve cap and extends downward to engage with the first valve core;

[0023] The first pressure cap is sleeved with the first valve stem and threadedly connected to the sleeve pressure cap.

[0024] Furthermore,

[0025] The sleeve and the first valve core each have an opening that communicates with the water outlet.

[0026] Furthermore,

[0027] The second valve body includes a second valve core, a second valve stem, and a second pressure cap;

[0028] The second valve core is an inverted cone shape;

[0029] The second valve core is located in the second chamber and can move up and down in the vertical direction;

[0030] The second valve stem is inserted into the second valve core and extends downward from the bottom of the main body;

[0031] The second pressure cap is sleeved with the second valve stem and threaded to the lower part of the main body.

[0032] Furthermore,

[0033] The lower part of the main body is provided with a drain outlet connected to the first pipeline;

[0034] The drain outlet is equipped with a first plug;

[0035] A second plug is installed at the top of the second chamber.

[0036] Furthermore,

[0037] The inlet is connected to the input pipe;

[0038] The water outlet is connected to the output pipe.

[0039] Furthermore,

[0040] The main body sidewall is provided with set screws;

[0041] The set screw is inserted into the main body and extends inward to abut against the side wall of the sleeve cap.

[0042] A positioning pin is provided at the lower part of the first chamber;

[0043] The sleeve has a positioning hole that mates with the positioning pin.

[0044] Furthermore,

[0045] Sealing gaskets are provided between the first sleeve and the sleeve cap, between the first valve stem and the sleeve cap, between the sleeve and the first chamber, between the second valve core and the second valve stem, and between the second cap and the main body.

[0046] Furthermore,

[0047] The second valve stem is equipped with an operating handle.

[0048] The beneficial effects of the high-pressure water injection gate in this invention are analyzed as follows:

[0049] The device includes a first chamber and a second chamber disposed within the main body, and a first valve body disposed within the first chamber and a second valve body disposed within the second chamber respectively; the lower parts of the first chamber and the second chamber are connected by a horizontally disposed first pipeline; the first valve body and the second valve body can independently control the opening and closing of the high-pressure water channel of the gate.

[0050] The U-shaped high-pressure water channel design of this scheme effectively mitigates the impact of high-pressure water flow on the first valve body, making it easy for staff to open and close. When the first valve body needs to be repaired, closing the second valve body can block the high-pressure water channel without shutting down the entire water supply pipeline, facilitating timely resumption of production. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0052] Figure 1 A schematic diagram of the high-pressure water injection gate provided in the embodiments of the present invention.

[0053] icon:

[0054] 100 - Main body; 110 - Set screw; 120 - Positioning pin;

[0055] 200 - First valve body; 210 - Sleeve cap; 220 - Sleeve; 230 - First valve core; 240 - First valve stem; 250 - First cap;

[0056] 300 - Second valve body; 310 - Second valve core; 320 - Second valve stem; 321 - Operating handle; 330 - Second pressure cap; 340 - First plug; 350 - Second plug;

[0057] 400 - First pipeline;

[0058] 500 - Outlet; 510 - Output pipe;

[0059] 600 - Water inlet; 610 - Input pipe. Detailed Implementation

[0060] As the water injection pressure increases, the required torque also increases. This means that in some cases, operators may face greater physical pressure and technical difficulties when opening or closing the gate, which may even lead to equipment damage or operational errors, increasing safety hazards.

[0061] Under high pressure, water injection gates are susceptible to erosion, leading to internal leakage or incomplete closure. These problems not only affect water injection efficiency but can also cause fluctuations in the formation waterline, negatively impacting the overall oilfield production efficiency. Frequent damage and internal leakage of the water injection gates significantly increase the frequency of equipment maintenance and replacement, thus consuming substantial human and material resources.

[0062] To ensure the safety of personnel and avoid injuries under high pressure, the entire water injection system is usually shut down during maintenance. While this measure protects operators, it also has significant side effects: stopping the water supply can cause the formation waterline to drop rapidly, thereby affecting the overall production of the well group and causing economic losses.

[0063] In view of this, such as Figure 1 As shown, this solution provides a high-pressure water injection gate to alleviate the above problems.

[0064] The device includes a first chamber and a second chamber disposed within the main body 100, and a first valve body 200 disposed in the first chamber and a second valve body 300 disposed in the second chamber.

[0065] The lower parts of the first chamber and the second chamber are connected by a horizontally arranged first pipe 400;

[0066] The first valve body 200 and the second valve body 300 can independently control the opening and closing of the high-pressure water channel of the gate.

[0067] Specifically, the first valve body 200 is the main valve of this device, used to control the opening and closing of the gate; the second valve body 300 is the auxiliary valve, which is normally open. When the first valve body 200 is under maintenance, the second valve body 300 is used to close the gate. In this scheme, the first chamber, the second chamber and the first pipeline 400 form a high-pressure water channel to avoid the high-pressure water flow directly scouring the first valve body 200 and causing difficulty in opening and closing.

[0068] Regarding the shape and structure of high-pressure water channels, such as Figure 1 As shown:

[0069] The first chamber and the second chamber are arranged parallel to each other in the vertical direction;

[0070] A water outlet 500 is provided at the end of the first chamber that is furthest from the second chamber;

[0071] The second chamber is provided with a water inlet 600 at the end furthest from the first chamber;

[0072] Both the outlet 500 and the inlet 600 are located above the first pipeline 400;

[0073] The inlet 600, the second valve body 300, the first pipeline 400, the first valve body 200 and the outlet 500 are connected in sequence to form a high-pressure waterway.

[0074] Specifically, the first chamber, the first pipeline 400, and the second chamber form a U-shaped waterway, which allows high-pressure water to flow into the first valve body 200 along the U-shaped waterway, reducing the impact of the high-pressure water flow on the first valve body 200 and making it easier for staff to open and close the first valve body 200.

[0075] In this design, the structure of the first valve body 200 is as follows:

[0076] The first valve body 200 includes a sleeve cap 210, a sleeve 220, a first valve core 230, a first valve stem 240, and a first cap 250;

[0077] The sleeve cap 210 and the sleeve 220 are inserted into the first chamber from top to bottom;

[0078] The first valve core 230 is inserted into the sleeve 220;

[0079] The first valve stem 240 is inserted into the sleeve cap 210 and extends downward to engage with the first valve core 230;

[0080] The first pressure cap 250 is sleeved with the first valve stem 240 and threadedly connected to the sleeve pressure cap 210;

[0081] Sleeve 220 and first valve core 230 each have an opening that communicates with water outlet 500.

[0082] Specifically, the upper part of the first chamber is connected to the outside of the main body, and the sleeve cap 210 is threadedly connected to the inner wall of the first chamber to close the opening at the top of the first chamber; the upper part of the first valve stem 240 is locked to the sleeve cap 210 by the first cap 250, and the first valve stem 240 is rotatably connected to both the first cap 250 and the sleeve cap 210. The first valve stem 240 can be engaged with the upper part of the first valve core 230 by means of a square locking block or other structure that facilitates torque transmission, so as to facilitate the passage of... The first valve core 230 is rotated by the first valve stem 240. The outer wall of the first valve core 230 is smoothed so that it can match the inner wall of the sleeve 220, so that the contact surface between the first valve core 230 and the sleeve 220 forms a seal. When the opening of the first valve core 230 coincides with the opening of the sleeve 220, the high-pressure water channel in the first valve body 200 is connected. When the opening of the first valve core 230 does not coincide with the opening of the sleeve 220, the high-pressure water channel in the first valve body 200 is closed.

[0083] In this design, the structure of the second valve body 300 is as follows:

[0084] The second valve body 300 includes a second valve core 310, a second valve stem 320, and a second pressure cap 330;

[0085] The second valve core 310 is in the shape of an inverted cone;

[0086] The second valve core 310 is disposed in the second chamber and can move up and down in the vertical direction;

[0087] The second valve stem 320 is inserted into the second valve core 310 and extends downward from the lower part of the main body 100;

[0088] The second pressure cap 330 is sleeved with the second valve stem 320 and threadedly connected to the lower part of the main body 100.

[0089] Specifically, the second valve body 300 is normally open. Under normal conditions, the second valve body 300 is in a connected state. However, when the first valve body 200 reaches the end of its service life or needs to be removed for maintenance, the second valve body 300 will close. A retainer that mates with the second valve core 310 is provided in the second chamber. When the second valve core 310 moves down and engages with the retainer, the high-pressure water channel inside the second valve body 300 can be closed. Preferably, the second valve body 300 adopts a plug valve design, changing the straight-through connection with the inlet pipe to a right-angle connection as in this design. It optimizes fluid stress, overcomes the problem that plug valves cannot be used in high-pressure environments, and the right-angle connection method makes the valve body not restricted by the installation direction, and the flow direction of the fluid can be adjusted arbitrarily. It utilizes the characteristics of plug valves, such as rapid opening and closing, ease of use, low fluid resistance, good sealing performance, and convenient maintenance, to solve the problems of difficult opening and closing and maintenance of gate valves. In addition, it has the advantage of low opening and closing torque, making it more suitable for installing automated control equipment in small spaces to control the opening and closing of the second valve body 300, and its relatively small size makes it easier to disassemble and maintain.

[0090] In this design, the lower part of the main body 100 is provided with a drain outlet that is connected to the first pipeline 400;

[0091] The drain outlet is equipped with a first plug 340;

[0092] A second plug 350 is installed at the upper part of the second chamber.

[0093] Specifically, because the high-pressure water channel inside the main body adopts a U-shaped design, the first pipe 400 is prone to accumulating impurities after long-term operation. Therefore, a drain outlet is provided. When using it, the second valve body 300 is closed first, and then the first plug 340 is removed to clean the first pipe 400. Since the second valve body 300 is a normally open design, its service life is longer than that of the first valve body 200. However, it will also fail after long-term use. Therefore, an opening communicating with the outside of the main body is provided at the upper part of the second chamber and the opening is closed by the second plug 350. The size of the opening is larger than the size of the second valve body 300 to facilitate replacement.

[0094] In this design, the inlet 600 is connected to the input pipe 610;

[0095] The outlet 500 is connected to the output pipe 510.

[0096] Specifically, the input pipe 610 and the output pipe 510 are at the same horizontal level after being connected to the main body, so that the device can be adapted to the original straight water supply pipeline.

[0097] In this design, the main body 100 is provided with a set screw 110 on its side wall;

[0098] The set screw 110 is inserted into the body 100 and extends inward to abut against the side wall of the sleeve cap 210;

[0099] A positioning pin 120 is provided at the lower part of the first chamber;

[0100] Sleeve 220 has a positioning hole that mates with positioning pin 120.

[0101] Specifically, the positioning pin 120 is a positioning tool for the sleeve 220, which prevents the sleeve 220 and the first valve core 230 from wearing and increasing resistance after the first valve body 200 has been used for a long time. This would cause the first valve core 230 to rotate and drive the sleeve 220 to rotate, which would make the sleeve 220 unable to align with the outlet 500 and reduce the water flow. The set screw 110 is a fixing tool for the sleeve cap 210, which prevents the first valve stem 240 from rotating and driving the sleeve cap 210, which would reduce the sealing performance.

[0102] In this design, in order to improve the sealing performance of the main body, sealing gaskets are provided between the first sleeve 220 and the sleeve cap 210, between the first valve stem 240 and the sleeve cap 210, between the sleeve 220 and the first chamber, between the second valve core 310 and the second valve stem 320, and between the second cap 330 and the main body 100.

[0103] In this design, the second valve stem 320 is equipped with an operating handle 321 to facilitate the opening and closing of the second valve body 300 by the operator.

[0104] This solution has at least the following beneficial effects:

[0105] The U-shaped high-pressure water channel design of this scheme effectively mitigates the direct impact of high-pressure water flow on the main valve body (first valve body 200), thereby extending the service life of the equipment and facilitating operation by staff. Secondly, the independent control design of the main valve body and the auxiliary valve body (second valve body 300) allows maintenance to be performed by closing the auxiliary valve body when the main valve body requires repair, without shutting down the entire system. This significantly improves maintenance efficiency and safety, and reduces economic losses caused by downtime.

[0106] The secondary valve body is designed to be normally open, reducing frequent operation and thus extending its service life and lowering maintenance costs. The design of the inlet pipe 610 and outlet pipe 510 being at the same height allows the device to easily adapt to existing straight water supply lines, simplifying installation and modification processes and saving time and money. The use of sealing gaskets in several critical locations ensures the system's reliability under high pressure and prevents accidental leaks.

[0107] This solution, through optimized structural design, effectively extends the service life of high-pressure water injection gates, improves maintenance efficiency and safety, reduces maintenance costs, and enhances system adaptability and reliability. These improvements not only enhance oilfield production efficiency and economic benefits but also embody the concepts of resource conservation and environmental protection, and are of great significance to the stable operation and long-term benefits of the oilfield water injection system.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure water injection gate, characterized in that: It includes a first chamber and a second chamber disposed within the main body (100), and a first valve body (200) disposed within the first chamber and a second valve body (300) disposed within the second chamber; The lower parts of the first chamber and the second chamber are connected by a horizontally arranged first pipe (400); The first valve body (200) and the second valve body (300) can independently control the opening and closing of the high-pressure water channel of the gate.

2. The high-pressure water injection gate according to claim 1, characterized in that: The first chamber and the second chamber are arranged parallel to each other in the vertical direction; An outlet (500) is provided at the end of the first chamber away from the second chamber; The second chamber is provided with a water inlet (600) at the end away from the first chamber; Both the outlet (500) and the inlet (600) are located above the first pipeline (400); The inlet (600), the second valve body (300), the first pipeline (400), the first valve body (200), and the outlet (500) are sequentially connected to form the high-pressure waterway.

3. The high-pressure water injection gate according to claim 2, characterized in that: The first valve body (200) includes a sleeve cap (210), a sleeve (220), a first valve core (230), a first valve stem (240), and a first cap (250); The sleeve cap (210) and the sleeve (220) are inserted into the first chamber from top to bottom; The first valve core (230) is inserted into the sleeve (220); The first valve stem (240) is inserted into the sleeve cap (210) and extends downward to engage with the first valve core (230); The first pressure cap (250) is sleeved with the first valve stem (240) and threadedly connected to the sleeve pressure cap (210).

4. The high-pressure water injection gate according to claim 3, characterized in that: The sleeve (220) and the first valve core (230) each have an opening that communicates with the water outlet (500).

5. The high-pressure water injection gate according to claim 4, characterized in that: The second valve body (300) includes a second valve core (310), a second valve stem (320), and a second pressure cap (330); The second valve core (310) is in the shape of an inverted cone; The second valve core (310) is disposed in the second chamber and can move up and down in the vertical direction; The second valve stem (320) is inserted into the second valve core (310) and extends downward from the lower part of the body (100); The second pressure cap (330) is sleeved with the second valve stem (320) and threadedly connected to the lower part of the body (100).

6. The high-pressure water injection gate according to claim 5, characterized in that: The lower part of the main body (100) is provided with a drain outlet that communicates with the first pipeline (400); The drain outlet is provided with a first plug (340); A second plug (350) is provided at the upper part of the second chamber.

7. The high-pressure water injection gate according to claim 6, characterized in that: The inlet (600) is connected to the input pipe (610); The outlet (500) is connected to the output pipe (510).

8. The high-pressure water injection gate according to claim 7, characterized in that: The main body (100) is provided with a set screw (110) on its side wall; The set screw (110) is inserted into the body (100) and extends inward to abut against the side wall of the sleeve cap (210); A positioning pin (120) is provided at the lower part of the first chamber; The sleeve (220) has a positioning hole that mates with the positioning pin (120).

9. The high-pressure water injection gate according to claim 8, characterized in that: Sealing gaskets are provided between the first sleeve (220) and the sleeve cap (210), between the first valve stem (240) and the sleeve cap (210), between the sleeve (220) and the first chamber, between the second valve core (310) and the second valve stem (320), and between the second cap (330) and the main body (100).

10. The high-pressure water injection gate according to claim 9, characterized in that: The second valve stem (320) is provided with an operating handle (321).

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