CN219528977U - Liquid injection valve with pressure-holding device - Google Patents
Liquid injection valve with pressure-holding device Download PDFInfo
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- CN219528977U CN219528977U CN202320379898.2U CN202320379898U CN219528977U CN 219528977 U CN219528977 U CN 219528977U CN 202320379898 U CN202320379898 U CN 202320379898U CN 219528977 U CN219528977 U CN 219528977U
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- liquid
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- injection valve
- holding device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a liquid injection valve with a pressure holding device, which comprises: the connecting pipe is provided with a first channel for liquid to flow; the fixing piece is fixedly arranged in the first channel and is also provided with a first through hole for the liquid to circulate; the pressure holding part comprises a connecting part, a flow blocking part and a neck part, wherein the two ends of the neck part are respectively and fixedly connected with the connecting part and the flow blocking part, the connecting part is fixedly connected with the fixing piece, and the flow blocking part is matched with the fixing piece to prevent the liquid flowing out of the first through hole from passing through the first channel; when the hydraulic pressure of the liquid reaches a fixed value, the neck portion breaks, and the flow blocking portion separates from the fixing member and causes the liquid to flow through the first passage. The liquid injection valve with the pressure holding device can achieve the aim of good tightness before a certain pressure is reached in a pipeline.
Description
Technical Field
The utility model relates to an underground tool for petroleum exploration, in particular to a liquid injection valve with a pressure holding device.
Background
In the production of oil and gas wells, depending on the specific characteristics of the oil and gas, problems such as corrosion, waxing, scaling or hydrates may occur. In order to prevent chemical attack in the wellbore and thereby to affect normal production operations, it is often necessary to inject liquids such as scale inhibitors, corrosion inhibitors, etc. into the wellbore production fluid. Liquid is typically pumped from the surface through a metal pilot line to a liquid injection valve placed in the subsurface hundreds or even thousands of meters and mixed into the wellbore production fluid to create a chemical effect. In the process of installing the liquid injection valve and the hydraulic control pipeline underground, as the hydraulic control pipeline is required to be continuously lowered into the well bottom for thousands of meters, the hydraulic control pipeline is inevitably contacted with the sleeve, damage and leakage are likely to occur, and liquid is lost from the damage position during use, so that the effect of liquid injection is greatly influenced. Therefore, after installation, a pressure hold-down device is required to check the pressure integrity of the pipeline. The pressure test is carried out on the whole pipeline by pushing the pressure-holding device, so that no leakage point is ensured.
The liquid injection valve in the prior art can be communicated through the cooperation of the spherical valve ball and the spring when the injection pressure is very low, and the pressure integrity of the hydraulic control pipeline cannot be verified through pressure test. The existing liquid injection valve is generally not provided with a pressure holding device, and can only realize the function of liquid injection.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a liquid injection valve with a pressure holding device, so as to realize the aim of good tightness before a certain pressure is reached in a pipeline.
To this end, in one embodiment, a liquid injection valve with a pressure holding device is provided, including:
the connecting pipe is provided with a first channel for liquid to flow;
the fixing piece is fixedly arranged in the first channel and is also provided with a first through hole for the liquid to circulate;
the pressure holding part comprises a connecting part, a flow blocking part and a neck part, wherein two ends of the neck part are respectively and fixedly connected with the connecting part and the flow blocking part, the connecting part is fixedly connected with the fixing piece and exposes out of the first through hole, and the flow blocking part is matched with the fixing piece to prevent the liquid flowing out of the first through hole from passing through the first channel; when the hydraulic pressure of the liquid reaches a fixed value, the choke is impacted by the liquid to break the neck, and the choke is separated from the fixing piece and enables the liquid to flow through the first channel.
As a further alternative of the liquid injection valve with the pressure holding device, the fixing member is screwed to the connecting portion.
As a further alternative of the liquid injection valve with the pressure holding device, the fixing member includes a flow guiding structure, and the flow guiding structure is disposed between the first through hole and the flow blocking portion and is capable of changing the direction of the liquid flowing.
As a further alternative of the liquid injection valve with the pressure holding device, the neck portion includes a cavity, and an opening of the cavity is provided in the flow blocking portion and communicates the first channel with the cavity.
As a further alternative of the liquid injection valve with the pressure-holding device, the flow-blocking portion is further provided with a second through hole, and the second through hole is used for the liquid to circulate after the flow-blocking portion is separated from the fixing piece.
As a further alternative of the liquid injection valve with the pressure holding device, the liquid injection valve further comprises a second channel, wherein the first channel is communicated with the second channel; when the choke is separated from the fixing piece, the communication part of the first channel and the second channel is positioned at the front end of the choke in the flowing direction of the liquid.
As a further alternative of the liquid injection valve with the pressure holding device, a limiting protrusion is provided on the inner wall of the connecting pipe, and the limiting protrusion is used for preventing the fixing member from moving under the impact of the liquid.
As a further alternative scheme of the liquid injection valve with the pressure holding device, the liquid injection valve further comprises an adapter, wherein the adapter is used for connecting the connecting pipe and an external water pipe, the adapter is provided with a third channel, and an opening of the third channel, which is close to one end of the connecting pipe, is gradually enlarged.
As a further alternative of the liquid injection valve with the pressure holding device, a ferrule assembly is further included, and the ferrule assembly is used for connecting the water pipe and the adapter.
As a further alternative scheme of the liquid injection valve with the pressure holding device, the liquid injection valve further comprises a slow flow pipe, wherein the slow flow pipe is communicated with the second channel, a spring and a valve ball are arranged in the slow flow pipe, the spring can squeeze the valve ball to enable the slow flow pipe to be closed, when the liquid passes through the valve ball, the water pressure enables the spring to shrink, and the valve ball is opened to enable the liquid to circulate.
The implementation of the embodiment of the utility model has the following beneficial effects:
according to the liquid injection valve with the pressure-holding device in the above embodiment, before the liquid injection valve with the pressure-holding device reaches the specified pressure, the liquid is blocked by the flow blocking portion after flowing in from the first through hole of the fixing member. The first passage is blocked by the cooperation of the choke and the fixing piece, and liquid cannot flow through the first passage. When the liquid injection valve with the pressure-holding device reaches the specified pressure, the liquid has water pressure on the flow blocking part, so that the flow blocking part receives acting force along the flowing direction of water flow. Before reaching the preset hydraulic pressure, the neck is not broken, so that the first channel can not be unblocked, and the liquid injection valve with the pressure-holding device can achieve the aim of good tightness before reaching a certain pressure in the pipeline.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
fig. 1 is a schematic diagram showing an overall structure of a liquid injection valve with a pressure holding device according to an embodiment of the present utility model;
fig. 2 shows a schematic cross-sectional view of a liquid injection valve with a pressure holding device according to an embodiment of the utility model;
FIG. 3 shows a partial enlarged view at A in FIG. 2;
FIG. 4 shows a partial enlarged view at B in FIG. 2;
fig. 5 shows a schematic structural diagram of a pressure holding member according to an embodiment of the present utility model;
FIG. 6 shows a schematic structural view of a fastener provided according to an embodiment of the present utility model;
fig. 7 shows a schematic view of another angle of the fixing member according to the embodiment of the present utility model.
Description of main reference numerals:
a connecting pipe-10; a first channel-110; a fixing member (20); a first via-210; a hold-down piece-30; a connection portion-310; a choke-320; neck-330; a diversion structure-220; cavity-3310; second through-hole-3210; a second channel-120; limit bump-130; an adapter-40; third channel-410; ferrule assembly-50; a buffer tube-60; valve ball-610; spring-620, seal ring-70.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In an embodiment of the present utility model, referring to fig. 1-3 and 5, a liquid injection valve with a pressure-holding device is provided, where the liquid injection valve with a pressure-holding device includes:
a connection pipe 10, the connection pipe 10 being provided with a first passage 110 through which a liquid flows;
the fixing piece 20 is fixedly arranged in the first channel 110, the fixing piece 20 is also provided with a first through hole 210, and the first through hole 210 is used for liquid circulation;
the pressure holding member 30, the pressure holding member 30 includes a connecting portion 310, a flow blocking portion 320 and a neck portion 330, two ends of the neck portion 330 are fixedly connected with the connecting portion 310 and the flow blocking portion 320 respectively, the connecting portion 310 is fixedly connected with the fixing member 20 and exposes the first through hole 210, and the flow blocking portion 320 is matched with the fixing member 20 to prevent liquid flowing out from the first through hole 210 from passing through the first channel 110; when the hydraulic pressure of the liquid reaches a constant value, the choke 320 is impacted by the liquid to break the neck 330, and the choke 320 is separated from the fixing member 20 and allows the liquid to flow through the first passage 110.
According to the liquid injection valve with the pressure-blocking device in the above embodiment, before the liquid injection valve with the pressure-blocking device reaches the specified pressure, the liquid is blocked by the flow blocking portion 320 after flowing in from the first through hole 210 of the fixing member 20. The cooperation of the flow blocking portion 320 and the fixing member 20 causes the first passage 110 to be in a blocked state, and the liquid cannot flow therethrough. When the liquid injection valve with the pressure-holding device reaches a specified pressure, the liquid has a water pressure on the choke 320, so that the choke 320 receives a force along the flow direction of the water, and since the connecting portion 310 is fixedly connected with the fixing member 20, the neck 330 is pulled until the neck 330 breaks, and after the break, the choke 320 is not pulled away by the liquid without a binding force from the neck 330, so that the choke 320 is separated from the fixing member 20, and the first channel 110 is communicated. Before reaching the preset hydraulic pressure, the neck 330 is not broken, so that the first channel 110 cannot be unblocked, and the liquid injection valve with the pressure holding device in the utility model can achieve the aim of good tightness before reaching a certain pressure in the pipeline.
It should be noted that, the first channel 110 is generally circular, the shape of the fixing member 20 is generally hollow cylindrical, and the fixing member 20 is installed in the first channel 110. The outer wall of the mount 20 generally has a ring of depressions for receiving the seal ring 70.
Typically, the fixing member 20 and the connecting portion 310 are also provided with a seal ring 70 for ensuring that good sealing is maintained until the hydraulic pressure reaches a predetermined value.
In some embodiments, the securing member 20 is threadably coupled to the connecting portion 310.
A screw-coupling port with internal screw threads is provided near the central axis of the fixing member 20, and an outer ring of the coupling portion 310 is provided with external screw threads matching the internal screw threads. When the fixing piece is installed, the fixing piece 20 and the holding-down piece 30 can be fixedly connected only by screwing the connecting part 310 into the screw joint.
Typically, the connecting portion 310 also has a recess for receiving the seal ring 70 to seal the securing member 20 to the connecting portion 310. The first through hole 210 is generally disposed around the screw interface to facilitate the liquid entering between the connecting portion 310 and the choke 320.
It should be noted that, the fixing member 20 and the connecting portion 310 may be screwed, or may be a structure such as a clamping structure or a pin structure, so long as the fixing member 20 and the connecting portion 310 can be fixed.
In some embodiments, referring to fig. 6 and 7, the fixing member 20 includes a flow guiding structure 220, and the flow guiding structure 220 is disposed between the first through hole 210 and the flow blocking portion 320 and is capable of changing the direction of the liquid flow.
In the field of liquid pipeline flow, there is a water hammer effect, i.e. inside the water pipe, the inner wall of the pipe is smooth and the water flow is free. When the open valve is suddenly closed, the water flow will generate a pressure against the valve and the pipe wall, mainly the valve. Because the pipe wall is smooth, the subsequent water flow rapidly reaches the maximum under the action of inertia and generates a destructive action, namely a 'water hammer effect' in hydraulics, namely a positive water hammer.
When the liquid flows out of the first through hole 210, a very large impact force is instantaneously generated, and if the flow blocking portion 320 is directly impacted, it is possible that the neck portion 330 is broken and the flow blocking portion 320 is separated from the fixing member 20 without reaching a predetermined hydraulic pressure. The flow guiding structure 220 is generally an elbow, which generally guides the flow direction of the liquid in the direction perpendicular to the connecting pipe 10, and the plurality of flow guiding structures 220 are arranged opposite to each other, so that the liquids can be mutually opposite to each other, and the harm of the water hammer effect is further reduced.
In some embodiments, referring to FIG. 3, the neck 330 includes a cavity 3310, with the opening of the cavity 3310 being provided in the flow-blocking portion 320 and communicating the first passage 110 with the cavity 3310.
In this embodiment, on the one hand, the cavity 3310 may reduce the strength of the neck 330, making the neck 330 easily broken. On the other hand, when the neck 330 is broken, the liquid may flow out from the broken portion of the neck 330 in case that the choke 320 is not completely separated from the fixing member 20. In addition, the choke 320 is always located in the connecting tube 10 after being separated from the fixing member 20, and part of the liquid can flow out from the fracture of the neck 330 to prevent blockage.
In some embodiments, the choke 320 further has a second through hole 3210, and the second through hole 3210 is configured for fluid communication when the choke 320 is separated from the fixing member 20.
To further ensure that the liquid can smoothly pass through the connection pipe 10 after the flow blocking portion 320 is separated from the fixing member 20. The flow blocking portion 320 is provided with a plurality of second through holes 3210, so that the liquid can still flow through the second through holes 3210 after the flow blocking portion 320 is separated from the fixing member 20.
In certain specific embodiments, further comprising a second channel 120, the first channel 110 being in communication with the second channel 120; when the flow blocking portion 320 is separated from the fixing member 20, the communication between the first passage 110 and the second passage 120 is located at the front end of the flow blocking portion 320 in the flow direction of the liquid.
In this embodiment, after the choke 320 is separated from the fixing member 20, a space exists in the second channel 120 for storing the choke 320, so as to reduce the influence of the choke 320 on the liquid circulation as much as possible. In the direction of the liquid flow, the communicating position of the first channel 110 and the second channel 120 is located at the front end of the flow blocking portion 320, so that the influence of the flow blocking portion 320 on the liquid flow can be well avoided.
In some embodiments, the inner wall of the connecting tube 10 is provided with a limit protrusion 130, and the limit protrusion 130 is used to prevent the fixing member 20 from moving under the impact of the liquid.
In order to prevent the fixing member 20 from flowing under the impact of the liquid, the limiting protrusion 130 is provided on the inner wall of the connection tube 10 to prevent such a situation.
Specifically, the stopper protrusion 130 is a stepped surface on the inner wall surface of the connection pipe 10.
In some embodiments, the adaptor 40 is used to connect the connection pipe 10 with an external water pipe, and the adaptor 40 is provided with a third passage 410, and the opening of the third passage 410 near one end of the connection pipe 10 is gradually enlarged.
In the present embodiment, the purpose of the adapter 40 is to connect an external water pipe for connecting the pipe 10. The reason why the opening of the third passage 410 is gradually enlarged near the end of the connection pipe 10 is that the connection pipe 10 has more parts, so that a larger first passage 110 is required for installing the fixing member 20 and the holding member 30.
In certain specific embodiments, a ferrule assembly 50 is also included, the ferrule assembly 50 being used to connect the water line and the adapter 40. Ferrule assembly 50 is a universal tubing connection assembly.
In some specific embodiments, referring to fig. 2 and 4, the device further includes a flow retarding pipe 60, wherein the flow retarding pipe 60 is communicated with the second channel 120, a spring 620 and a valve ball 610 are disposed in the flow retarding pipe 60, the spring 620 can press the valve ball 610 to close the flow retarding pipe 60, when the liquid passes through the valve ball 610, the water pressure causes the spring 620 to shrink, and the valve ball 610 is opened to circulate the liquid.
In this embodiment, the slow flow pipe 60 functions as a one-way valve. When the liquid flows in a predetermined direction, the liquid pushes the valve ball 610 open, compressing the spring 620. However, when the direction of the general liquid flow is opposite to the predetermined direction, the second passage 120 is closed by the spring 620 pressing the valve ball 610, and the liquid cannot flow back.
Further, a combination of two valve balls 610 and a spring 620 may be continuously provided, further ensuring that the liquid cannot flow back.
Finally, it should be noted that the liquid in the water pipe in all the above embodiments may be water, petroleum or other liquid.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A liquid injection valve with a pressure build-up device, comprising:
the connecting pipe is provided with a first channel for liquid to flow;
the fixing piece is fixedly arranged in the first channel and is also provided with a first through hole for the liquid to circulate;
the pressure holding part comprises a connecting part, a flow blocking part and a neck part, wherein two ends of the neck part are respectively and fixedly connected with the connecting part and the flow blocking part, the connecting part is fixedly connected with the fixing piece and exposes out of the first through hole, and the flow blocking part is matched with the fixing piece to prevent the liquid flowing out of the first through hole from passing through the first channel; when the hydraulic pressure of the liquid reaches a fixed value, the choke is impacted by the liquid to break the neck, and the choke is separated from the fixing piece and enables the liquid to flow through the first channel.
2. The liquid injection valve with a pressure holding device according to claim 1, wherein the fixing member is screwed to the connecting portion.
3. The liquid injection valve with a pressure holding device according to claim 1, wherein the fixing member includes a flow guiding structure, and the flow guiding structure is disposed between the first through hole and the flow blocking portion and is capable of changing a direction of the liquid flow.
4. The liquid injection valve with pressure holding device according to claim 1, wherein said neck portion comprises a cavity, and an opening of said cavity is provided in said flow blocking portion and communicates said first passage with said cavity.
5. The liquid injection valve with a pressure holding device according to claim 1, wherein the flow blocking portion is further provided with a second through hole, and the second through hole is used for the liquid to circulate after the flow blocking portion is separated from the fixing piece.
6. The liquid injection valve with a pressure holding device of claim 1, further comprising a second channel, said first channel being in communication with said second channel; when the choke is separated from the fixing piece, the communication part of the first channel and the second channel is positioned at the front end of the choke in the flowing direction of the liquid.
7. The liquid injection valve with a pressure holding device according to claim 1, wherein the inner wall of the connecting pipe is provided with a limit protrusion for preventing the fixing member from moving under the impact of the liquid.
8. The liquid injection valve with a pressure holding device according to claim 1, further comprising an adapter for connecting the connecting pipe and an external water pipe, wherein the adapter is provided with a third passage, and an opening of the third passage near one end of the connecting pipe is gradually enlarged.
9. The liquid injection valve with a pressure holding device of claim 8, further comprising a ferrule assembly for connecting the water tube and the adapter.
10. The liquid injection valve with a pressure holding device according to claim 6, further comprising a flow retarding pipe, wherein the flow retarding pipe is communicated with the second channel, a spring and a valve ball are arranged in the flow retarding pipe, the spring can press the valve ball to enable the flow retarding pipe to be closed, when the liquid passes through the valve ball, the water pressure enables the spring to shrink, and the valve ball is opened to enable the liquid to circulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320379898.2U CN219528977U (en) | 2023-02-22 | 2023-02-22 | Liquid injection valve with pressure-holding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320379898.2U CN219528977U (en) | 2023-02-22 | 2023-02-22 | Liquid injection valve with pressure-holding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219528977U true CN219528977U (en) | 2023-08-15 |
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ID=87644122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320379898.2U Active CN219528977U (en) | 2023-02-22 | 2023-02-22 | Liquid injection valve with pressure-holding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219528977U (en) |
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2023
- 2023-02-22 CN CN202320379898.2U patent/CN219528977U/en active Active
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