Well washing valve

Abstract

The well washing valve comprises a valve body, a first valve element assembly and a second valve element assembly, the valve body is provided with a washing channel and a liquid passing channel which are communicated with each other, the washing channel is further communicated with the outside of the valve body, and the two ends of the liquid passing channel are provided with a liquid inlet end and a liquid outlet end respectively; the first valve element assembly is arranged in the cleaning channel and used for allowing liquid in the cleaning channel to flow to the liquid passing channel. The second valve element assembly is arranged in the liquid passing channel and used for allowing liquid in the liquid passing channel to flow from the liquid inlet end to the liquid outlet end. Thus, the cleaning channel and the liquid passing channel which are separated are formed in the valve body, the first valve element assembly is arranged in the cleaning channel to restrain liquid from flowing between the cleaning channel and the liquid passing channel, the risk that impurities enter the cleaning channel when the liquid is normally conveyed is reduced, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model discloses an open and close valve field, especially relates to a well flushing valve. BACKGROUND

[0002] The well flushing valve is used in the pipeline cleaning or water injection well flushing scene in oil field exploitation, and the well flushing valve generally only includes a one-way valve core. When cleaning work is carried out, the well flushing valve is used to pressurize and input cleaning liquid into the pipeline to be cleaned, the cleaning liquid pushes away the one-way valve core, and then flows along the pipeline and carries the sundries (such as silt) in the pipeline to flow out of the outside, so that the cleaning purpose is achieved. However, after the cleaning is completed, the liquid in the pipeline will flow back when the screw pump stops, so that the lower unit has the risk of being damaged. SUMMARY

[0003] In order to solve the above technical problems, the utility model discloses a kind of well flushing valves that can reduce liquid backflow.

[0004] The utility model discloses an open and close valve field, especially relates to a well flushing valve.

[0005] A well flushing valve, comprising a valve body, a first valve core assembly and a second valve core assembly, the valve body is provided with a cleaning channel and a liquid passage which are communicated, the cleaning channel is also communicated with the outside of the valve body, and the liquid inlet end and the liquid outlet end are respectively arranged at the two ends of the liquid passage;The first valve core assembly is arranged in the cleaning channel, and the first valve core assembly is used for allowing the liquid in the cleaning channel to flow to the liquid passage;The second valve core assembly is arranged in the liquid passage, and the second valve core assembly is used for allowing the liquid in the liquid passage to flow from the liquid inlet end to the liquid outlet end.

[0006] In some embodiments, the cleaning channel includes a first chamber and a second chamber which are communicated, the first chamber is communicated with the liquid passage, and the second chamber is communicated with the outside of the valve body;The first valve core assembly is arranged in the first chamber, and the first valve core assembly is used for allowing the liquid in the second chamber to flow to the first chamber.

[0007] In some embodiments, the first valve core assembly includes an elastic member, a first valve ball and a first valve seat, the elastic member, the first valve ball and the first valve seat are sequentially arranged along the direction from the first chamber to the second chamber, and the first valve ball is detachably abutted against the first valve seat;The first valve seat is provided with a first communication hole, and the two ends of the first communication hole are respectively communicated with the first chamber and the second chamber;One end of the elastic member is abutted against the inner wall of the first chamber, the other end of the elastic member is connected with the first valve ball, and the elastic member can apply elastic force to the first valve ball to make the first valve ball close the first communication hole.

[0008] In some embodiments, the first valve core assembly further comprises a sleeve, the sleeve is provided with a receiving cavity and an opening, the receiving cavity is communicated with the first communication hole, and the opening is communicated with the receiving cavity and the liquid passage, respectively; the elastic member is arranged in the receiving cavity, one end of the elastic member away from the first valve ball abuts against the inner wall of the sleeve, and the first valve ball is at least partially arranged in the receiving cavity.

[0009] In some embodiments, the first valve core assembly further comprises a push block, the push block is arranged between the elastic member and the first valve ball, and the push block abuts against the first valve ball; and / or the first valve core assembly further comprises a first baffle, the first baffle is arranged at one end of the first valve seat away from the first valve ball, and the first baffle abuts against the first valve seat, wherein the first baffle is provided with an avoiding hole communicated with the first communication hole and the second cavity.

[0010] In some embodiments, the valve body is provided with a communication groove, the communication groove is communicated with the first cavity and the liquid passage, respectively; and / or the valve body is provided with a cleaning hole, the cleaning hole is communicated with the second cavity, and the cleaning hole is communicated with the outside of the valve body.

[0011] In some embodiments, the second valve core assembly comprises a second valve seat and a second valve ball, the second valve seat is arranged at one end of the second valve ball away from the liquid outlet end, and the second valve ball abuts against the second valve seat detachably; the second valve seat is provided with a second communication hole, the second communication hole extends from one end of the second valve seat towards the liquid outlet end to the other end of the second valve seat, and the second valve ball can abut against the second valve seat to close the second communication hole.

[0012] In some embodiments, the second valve core assembly further comprises a second baffle, the second baffle is arranged at one side of the second valve ball away from the second valve seat, wherein the second baffle is provided with a through hole communicated with the liquid outlet end.

[0013] In some embodiments, the valve body is provided with a cleaning hole communicated with the cleaning passage, the cleaning hole is also communicated with the outside of the valve body, the well flushing valve further comprises a first filter, the first filter is arranged in the valve body and covers the cleaning hole; and / or the well flushing valve further comprises a second filter, the second filter is arranged in the first valve core assembly, and the second filter is used for filtering the liquid flowing from the cleaning passage to the liquid passage.

[0014] In some embodiments, the valve body comprises a first valve body and a second valve body connected with each other, the cleaning passage and the liquid passage extend from the first valve body to the second valve body, respectively, and the first valve core assembly and the second valve core assembly are both arranged in the first valve body.

[0015] The beneficial effects of the utility model embodiment are that the well washing valve provided by the application embodiment comprises a valve body, a first valve core assembly and a second valve core assembly, the valve body is provided with a cleaning channel and a liquid passing channel which are connected in communication, the cleaning channel is further connected in communication with the outside of the valve body, and the liquid passing channel is respectively provided with a liquid inlet end and a liquid outlet end at two ends thereof; the first valve core assembly is arranged in the cleaning channel, and the first valve core assembly is used for allowing the liquid in the cleaning channel to flow to the liquid passing channel; and the second valve core assembly is arranged in the liquid passing channel, and the second valve core assembly is used for allowing the liquid in the liquid passing channel to flow from the liquid inlet end to the liquid outlet end. In this way, by arranging the separated cleaning channel and liquid passing channel in the valve body, the first valve core assembly is arranged in the cleaning channel to restrict the liquid to flow between the cleaning channel and the liquid passing channel, so that the risk of impurities entering the cleaning channel when the liquid is normally conveyed is reduced; the second valve core assembly is arranged in the liquid passing channel, so that in the shutdown state after the cleaning is completed, the liquid backflow can be avoided, and the risk of damage to the lower unit is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] One or more embodiments are illustrated by way of example in the figures that form a part of this disclosure and which are shown by way of example, not limitation, in the figures of the accompanying drawings and in which like reference numerals refer to like components in which changes in label meaning throughout the specifications and drawings visible. The figures in the drawings do not constitute a proportional limit.

[0017] Figure 1 It is a structure schematic view of the well washing valve of one of the embodiments of the application;

[0018] Figure 2 It is Figure 1 A schematic view after cutting along the PP in the middle;

[0019] Figure 3 It is a sectional view of the valve body;

[0020] Figure 4 It is Figure 1 An explosion view of

[0021] Figure 5 It is an explosion view of the first valve core assembly in Figure 4

[0022] Figure 6 It is a schematic view of liquid flow when the well washing valve is cleaned;

[0023] In the figure: 1, well washing valve; 2, valve body; 3, first valve core assembly; 4, second valve core assembly; 5, first filter; 6, second filter;

[0024] 201, cleaning channel; 202, liquid passing channel; 2021, liquid inlet end; 2022, liquid outlet end; 203, cleaning hole; 2011, first chamber; 2012, second chamber; 2013, communication groove; ​

[0025] 21, first valve body; 22, second valve body; 211, main body part; 212, extension part; 221, abutting hole; 2121, sealing groove;

[0026] 31, elastic member; 32, first valve ball; 33, first valve seat; 34, sleeve; 35, push block; 36, first baffle; 361, avoiding hole;

[0027] 331, first communication hole; 341, opening; 342, accommodating cavity;

[0028] 41, second valve seat; 42, second valve ball; 43, stop block;

[0029] 411, second communication hole; 431, through hole. DETAILED DESCRIPTION

[0030] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like used in the present specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0031] Unless otherwise defined, all technical and scientific terms used in the present specification have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0032] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0033] As Figures 1-2As shown, the well washing valve 1 provided by one of the embodiments of the present application comprises a valve body 2, a first valve core assembly 3 and a second valve core assembly 4, and the first valve core assembly 3 and the second valve core assembly 4 are arranged in the valve body 2. The valve body 2 is provided with a cleaning channel 201 and a liquid passing channel 202 which are in communication, and the cleaning channel is also in communication with the outside of the valve body. The liquid passing channel 202 is provided with a liquid inlet end 2021 and a liquid outlet end 2022 at two ends respectively. The first valve core assembly 3 is arranged in the cleaning channel 201, and the first valve core assembly 3 is used for allowing the liquid in the cleaning channel 201 to flow to the liquid passing channel 202. The second valve core assembly is arranged in the liquid passing channel, and the second valve core assembly is used for allowing the liquid in the liquid passing channel to flow from the liquid inlet end to the liquid outlet end.

[0034] In actual use, the well washing valve 1 is arranged in the casing of the oil extraction equipment, and the liquid inlet end 2021 and the liquid outlet end 2022 are in communication with the oil pipe of the oil extraction equipment respectively. In the working state of the oil extraction equipment, the well fluid is driven by the screw pump to flow from the downhole to the uphole through the oil pipe, and the well fluid can push away the second valve core assembly 4 after entering the liquid passing channel 202 from the liquid inlet end 2021, and then flow out from the liquid outlet end 2022 after passing through the second valve core assembly 4. At this time, the pressure in the cleaning channel 201 is less than the pressure in the liquid passing channel 202, and the first valve core assembly 3 is closed. In the cleaning state of the oil extraction equipment, the cleaning liquid is input into the casing, and the cleaning liquid enters the cleaning channel 201 to make the pressure in the cleaning channel 201 greater than the pressure in the liquid passing channel 202. After the cleaning liquid pushes away the first valve core assembly 3, the cleaning liquid enters the liquid passing channel 202, and then the cleaning liquid pushes away the second valve core assembly 4 to flow into the oil pipe from the liquid outlet end 2022 to clean the oil pipe. In the closed state of the oil extraction equipment, after the input of the cleaning liquid is stopped, the first valve core assembly 3 is closed, and the pressure on the side of the second valve core assembly 4 towards the liquid outlet end is greater than the pressure on the other side of the second valve core assembly 4, so that the second valve core assembly 4 is also closed, thereby avoiding the backflow of the liquid in the oil pipe to cause damage to the unit. Moreover, by arranging the separate cleaning channel 201 and the liquid passing channel 202 in the valve body 2, and arranging the first valve core assembly 3 in the cleaning channel 201 to restrict the flow of the liquid between the cleaning channel 201 and the liquid passing channel 202, the risk of impurities entering the cleaning channel 201 during normal transportation of the well fluid is also reduced.

[0035] In some embodiments, the cleaning channel 201 comprises a first chamber 2011 and a second chamber 2012 connected in communication, the first chamber 2011 is in communication with the liquid passing channel 202, and the second chamber 2012 is in communication with the outside of the valve body 2. The first valve core assembly 3 is arranged in the first chamber 2011, and the first valve core assembly 3 is used for the liquid in the second chamber 2012 to flow into the first chamber 2011. That is, when cleaning is needed, the first valve core assembly 3 is in an open state, the liquid outside the valve body 2 can enter the second chamber 2012, and then flow into the first chamber 2011 through the first valve core assembly 3, and then flow into the liquid passing channel 202 from the first chamber 2011 and finally flow out from the liquid outlet 2022. When cleaning is not needed, the first valve core assembly 3 is in a closed state, and the liquid in the second chamber 2012 cannot enter the first chamber 2011 through the first valve core assembly 3.

[0036] In some embodiments, as shown in Figures 2-4 The valve body 2 comprises a first valve body 21 and a second valve body 22 connected, and the interiors of the first valve body 21 and the second valve body 22 are partially hollowed out to form the liquid passing channel 202 and the cleaning channel 201. The first valve core assembly 3 and the second valve core assembly 4 are both arranged in the first valve body 21, and the cleaning channel 201 and the liquid passing channel 202 extend from the first valve body 21 to the second valve body 22. The first valve body 21 comprises a main body part 211 and an extension part 212, the extension part 212 extends from one end of the main body part 211 towards the second valve body 22, the second valve body 22 is provided with a butt joint hole 221, and the extension part 212 is arranged in the butt joint hole 221 and connected with the second valve body 22, so as to facilitate the positioning and installation between the first valve body 21 and the second valve body 22. In this embodiment, the end of the first valve body 21 away from the second valve body 22 is the liquid outlet 2022, and the end of the second valve body 22 away from the first valve body 21 is the liquid inlet 2021 of the valve body 2.

[0037] It can be understood that the connection mode between the first valve body 21 and the second valve body 22 can be threaded connection, clamping or other modes, as long as the first valve body 21 and the second valve body 22 can be connected. In this embodiment, the first valve body 21 and the second valve body 22 are connected by threaded connection, that is, the outer periphery of the extension part 212 is provided with external threads, and the inner wall surface of the butt joint hole 221 is provided with internal threads for threaded connection with the external threads.

[0038] In some embodiments, as shown in Figure 4 The extension part 212 is provided with a sealing groove 2121, and the well flushing valve 1 further comprises a sealing member (not shown in the figure), which is arranged in the sealing groove 2121, so as to improve the sealing performance between the extension part 212 and the butt joint hole 221 and reduce the gap between the extension part 212 and the butt joint hole 221 for the liquid to enter.

[0039] In some embodiments, please combine Figure 2 and Figure 5 The first valve core assembly 3 includes an elastic element 31, a first valve ball 32, and a first valve seat 33, along the direction from the first chamber 2011 toward the second chamber 2012 (i.e., Figure 2 In the direction shown (X), an elastic element 31, a first valve ball 32, and a first valve seat 33 are sequentially arranged. One end of the elastic element 31 abuts against the inner wall of the first chamber 2011, and the other end of the elastic element 31 is connected to the first valve ball 32. The first valve ball 32 is detachably abuts against the first valve seat 33. The first valve seat 33 is provided with a first connecting hole 331, and the two ends of the first connecting hole 331 are respectively connected to the first chamber 2011 and the second chamber 2012. The elastic element 31 can apply an elastic force to the first valve ball 32 to close the first connecting hole 331.

[0040] Understandably, when valve body 2 needs cleaning, the first valve ball 32 is subjected to a preset pressure, pressing against the elastic element 31. The first valve ball 32 compresses the elastic element 31 under this preset pressure. The first chamber 2011 and the second chamber 2012 are connected through the first connecting hole 331. The first valve ball 32 moves away from the position blocking the first connecting hole 331. Liquid in the second chamber 2012 enters the first chamber 2011 through the first connecting hole 331 and can flow into the liquid passage 202. At this time, the first valve core assembly 3 is in the open state. When valve body 2 does not need cleaning, the elastic element 31 presses against the first valve ball 32, blocking the first connecting hole 331. At this time, the first valve core assembly 3 is in the closed state, and the first chamber 2011 and the second chamber 2012 are not connected. Liquid is transported from the inlet end 2021 of valve body 2 to the outlet end 2022 of valve body 2.

[0041] It should be understood that the diameter of the first valve ball 32 is larger than the diameter of the first connecting hole 331, so that the first valve ball 32 can block the first connecting hole 331. The elastic element 31 can be a spring or other parts with elastic compression, such as a silicone block, as long as the elastic element 31 can be elastically compressed.

[0042] In some embodiments, please combine Figure 2 and Figure 5 The first valve core assembly 3 also includes a sleeve 34, which is disposed within the first chamber 2011. Both ends of the sleeve 34 abut against the first valve seat 33 and the inner wall of the first chamber 2011, respectively. The sleeve 34 has a receiving cavity 342 and an opening 341, which connects the receiving cavity 342 and the fluid passage 202. The receiving cavity 342 accommodates the elastic element 31 and the first valve ball 32. The sleeve 34 prevents the elastic element 31 and the first valve ball 32 from detaching from the second chamber 2012, thus improving the stability of the well-washing valve 1.

[0043] In some embodiments, please refer to Figure 2 With Figure 5 , the first valve core assembly 3 further comprises a push block 35 connected to the elastic member 31 and abutting against one end of the first valve ball 32. In this embodiment, the elastic member 31 comprises a spring, the push block 35 is located in the sleeve 34, one end of the push block 35 is inserted into the spring and abuts against the end of the spring, and the other end of the push block 35 abuts against the first valve ball 32, so as to facilitate the compression of the spring along the central axis of the spring and reduce the risk of spring twisting.

[0044] In some embodiments, please refer to Figure 2 With Figure 5 , the first valve core assembly 3 further comprises a first baffle 36 arranged at one end of the first valve seat 33 away from the first valve ball 32, wherein the first baffle 36 is provided with a bypass hole 361 communicating the first communication hole 331 and the second chamber 2012, and the liquid can flow to the first communication hole 331 through the bypass hole 361 to press the first valve ball 32. In this embodiment, the first baffle 36 is located in the first valve body 21, and one end of the first baffle 36 abuts against the first valve seat 33, and the other end of the first baffle 36 abuts against the end face of the second valve body 22, so that the elastic member 31 is in a pre-compressed state in a normal state, to ensure that the first valve ball 32 abuts against the first valve seat 33 to block the first communication hole 331.

[0045] It should be understood that the valve body 2 is provided with a communication groove 2013 for communicating the first chamber 2011 and the liquid passage 202, so as to facilitate the flow of liquid between the first chamber 2011 and the liquid passage 202. Similarly, the valve body 2 is provided with a cleaning hole 203, the cleaning hole 203 communicates with the second chamber 2012, and the cleaning hole 203 communicates with the outside of the valve body 2, that is, the liquid outside can flow into the second chamber 2012 through the cleaning hole 203.

[0046] It can be understood that the position of the second valve core assembly 4 can be set as needed, for example, the second valve core assembly 4 can be arranged near the liquid inlet end 2021 of the valve body 2, or can be arranged near the liquid outlet end 2022 of the valve body 2. In this embodiment, the second valve core assembly 4 is arranged near the liquid outlet end 2022 of the valve body 2, and the second valve core assembly 4 is closer to the liquid outlet end 2022 of the valve body 2 than the first valve core assembly 3 in the direction from the liquid inlet end 2021 of the valve body 2 to the liquid outlet end 2022 of the valve body 2, which is conducive to the fact that the abnormal objects (such as sand) existing in the second valve core assembly 4 can be taken out of the valve body 2 after the liquid flows from the cleaning channel 201 into the liquid passage 202, thereby reducing the risk of blocking the liquid passage 202.

[0047] In some embodiments, as Figure 2As shown, the second valve core assembly 4 includes a second valve seat 41 and a second valve ball 42 arranged in the liquid passing channel 202, the second valve seat 41 is arranged at one end of the second valve ball 42 away from the liquid outlet end 2022, and the second valve ball 42 is detachably abutted against the second valve seat 41. The second valve seat 41 is provided with a second communication hole 411 extending from one end of the second valve seat 41 towards the liquid outlet end 2022 to the other end of the second valve seat 41, and the second valve ball 42 can abut against the second valve seat 41 to close the second communication hole 411.

[0048] As can be understood, when the liquid transported along the liquid passing channel 202 reaches the second valve seat 41, the second valve ball 42 is separated from the second valve seat 41 as the pressure applied by the transported liquid increases, so that the liquid flows to the liquid outlet end 2022 through the second communication hole 411 of the second valve ball 42. When the liquid flows into the valve body 2 from the liquid outlet end 2022 of the valve body 2, the liquid cannot flow to the liquid inlet end 2021 of the valve body 2 due to the blocking of the second valve ball 42, thereby achieving the effect of preventing backflow.

[0049] In some embodiments, as shown in Figure 2 As shown, the second valve core assembly 4 further includes a second baffle plate 43 arranged on the side of the second valve ball 42 away from the second valve seat 41, that is, the second valve ball 42 is located between the second valve seat 41 and the second baffle plate 43, and the second baffle plate 43 is farther away from the first valve core assembly 3 than the second valve seat 41. The second baffle plate 43 is provided with a through hole 431 communicating the second communication hole 411 and the liquid outlet end 2022. In this way, the second valve ball 42 is constrained to move within a certain space under the action of the second baffle plate 43, thereby avoiding the second valve ball 42 from being pushed out of the valve body 2. It should be understood that the diameter of the second communication hole 411 is smaller than the diameter of the second valve ball 42, so as to avoid the second valve ball 42 from being embedded in the second communication hole 411 of the second valve seat 41.

[0050] In some embodiments, as shown in Figure 2 As shown, the number of through holes 431 arranged on the second baffle plate 43 is at least two spaced-apart through holes 431. In this way, compared with the case where only one through hole 431 is arranged on the second baffle plate 43, the stability of the well washing valve 1 is improved when the liquid pushes the second valve ball 42 to move and blocks the only through hole 431.

[0051] In some embodiments, as shown in Figure 2 and Figure 5As shown, the well-washing valve 1 also includes a first filter element 5. The valve body 2 is provided with a cleaning hole 203 communicating with the second chamber 2012. The first filter element 5 is located on the valve body 2 and covers the cleaning hole 203. In use, the cleaning fluid is filtered by the first filter element 5 before entering the second chamber 2012 through the cleaning hole 203, reducing the risk of abnormal objects (such as sand and gravel) carried by the cleaning fluid entering the second chamber 2012 through the cleaning hole 203.

[0052] It should be understood that the first filter element 5 can be a filter screen, a filter sheet, or any other type, as long as it can filter the liquid passing through the cleaning hole 203. In this embodiment, the first filter element 5 is a filter screen, which is arranged in a ring around the second valve body 22 and covers the cleaning hole 203.

[0053] In some embodiments, such as Figure 2 and Figure 5 As shown, the well-washing valve 1 also includes a second filter element 6, which is disposed on the first valve core assembly 3. The second filter element 6 is used to filter the liquid flowing between the liquid passage 202 and the cleaning passage 201. In this embodiment, the second filter element 6 is sleeved on the sleeve 34 and covers the opening 341 to filter the liquid flowing between the liquid passage 202 and the cleaning passage 201. The second filter element 6 can be a filter screen, a filter sheet, or any other type, as long as it can filter the liquid passing through the opening 341.

[0054] In use, when cleaning is not required, the liquid supplied from the inlet end 2021 of the valve body 2 flows along the liquid passage 202 to the second valve core assembly 4. When the liquid pressure in the liquid passage 202 reaches a level sufficient to open the second valve ball 42, the second valve ball 42 moves to open the second connecting hole 411. The liquid then flows through the second connecting hole 411 and through the through hole 431 of the second baffle 43, exiting from the outlet end 2022 of the valve body 2. When cleaning is required, such as... Figure 5 As shown, cleaning liquid is introduced into the first chamber 2011 of the cleaning channel 201. After being filtered by the first filter element 5, the cleaning liquid enters the second chamber 2012 through the cleaning hole 203. As the hydraulic pressure of the liquid in the second chamber 2012 increases and reaches a preset pressure sufficient to push the first valve ball 32 to move, the first valve ball 32 will compress the elastic element 31 and open the first connecting hole 331. The cleaning liquid enters the first chamber 2011 through the first connecting hole 331 and flows to the liquid passage 202. After pushing open the second valve ball 42, the cleaning liquid flows into the space between the second baffle 43 and the second valve seat 41, and finally flows out of the outlet end 2022 of the valve body 2 from the through hole 431 of the second baffle 43. At the same time, the foreign matter carried by the cleaning liquid after cleaning the inside of the valve body 2 will also flow out of the valve body 2.

[0055] It is worth mentioning that the liquid flowing from the liquid inlet end 2021 of the valve body 2 to the liquid outlet end 2022 of the valve body 2 can be oil or other fluid medium, and is determined according to the specific use scene of the well flushing valve 1. The cleaning liquid into the second chamber 2012 refers to the liquid used when the inside of the well flushing valve 1 or the pipeline needs to be cleaned, which can be tap water or washing liquid, or other liquid capable of cleaning foreign matters, and is selected according to the need.

[0056] The above is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A well wash valve characterized by, The utility model provides a valve body, the valve body is provided with the cleaning channel and the liquid passage who links to each other, the cleaning channel still communicates with the outside of the valve body, and the both ends of the liquid passage are respectively provided with the liquid inlet end and the liquid outlet end, the first valve core subassembly is arranged in the cleaning channel, and the first valve core subassembly is used for the liquid in the cleaning channel to flow to the liquid passage, the second valve core subassembly is arranged in the liquid passage, and the second valve core subassembly is used for the liquid in the liquid passage to flow from the liquid inlet end to the liquid outlet end. The cleaning channel includes a first chamber and a second chamber that are in communication, the first chamber is in communication with the liquid passage, and the second chamber is in communication with the outside of the valve body; The first valve core subassembly is arranged in the first chamber, and the first valve core subassembly is used for the liquid in the second chamber to flow to the first chamber. The first valve core subassembly includes an elastic member, a first valve ball, and a first valve seat, along the direction of the first chamber towards the second chamber, the elastic member, the first valve ball, and the first valve seat are sequentially arranged, and the first valve ball is detachably abutted against the first valve seat; 2. The well kill valve of claim 1, wherein, The first valve seat is provided with a first communication hole, and the both ends of the first communication hole are respectively communicated with the first chamber and the second chamber; One end of the elastic member is abutted against the inner wall of the first chamber, the other end of the elastic member is connected to the first valve ball, and the elastic member can apply an elastic force to the first valve ball to make the first valve ball close the first communication hole.

3. The well wash valve of claim 2, wherein, The first valve core subassembly further includes a sleeve, the sleeve is provided with a containing cavity and an opening, the containing cavity is communicated with the first communication hole, and the opening is respectively communicated with the containing cavity and the liquid passage; The elastic member is arranged in the containing cavity, one end of the elastic member away from the first valve ball is abutted against the inner wall of the sleeve, and the first valve ball is at least partially arranged in the containing cavity. The first valve core subassembly further includes a push block connected to one end of the elastic member towards the first valve ball, and the push block is abutted against the first valve ball; and / or, 4. The well wash valve of claim 3, wherein, The first valve core subassembly further includes a first baffle arranged at one end of the first valve seat away from the first valve ball, and the first baffle is provided with a bypass hole communicated with the first communication hole and the second chamber. The valve body is provided with a communication groove communicated with the first chamber and the liquid passage; and / or, 5. The well wash valve of claim 4, wherein, The valve body is provided with a cleaning hole communicated with the second chamber, and the cleaning hole is communicated with the outside of the valve body. The second valve core subassembly includes a second valve seat and a second valve ball, the second valve seat is arranged at one end of the second valve ball away from the liquid outlet end, and the second valve ball is detachably abutted against the second valve seat; 6. The well wash valve of claim 2, wherein, The second valve seat is provided with a second communication hole, the second communication hole extends from one end of the second valve seat towards the liquid outlet end to the other end of the second valve seat, and the second valve ball can abut against the second valve seat to close the second communication hole. ​ 7. The well wash valve of claim 1, wherein, ​ ​ 8. The well wash valve of claim 7, wherein, The second valve core assembly further comprises a second baffle plate arranged on a side of the second valve ball away from the second valve seat, wherein the second baffle plate is provided with a through hole communicating the second communication hole and the liquid outlet.

9. The well wash valve of claim 1, wherein, The valve body is provided with a cleaning hole communicating with the cleaning channel, the cleaning hole further communicates with the outside of the valve body, and the well flushing valve further comprises a first filter element arranged on the valve body and covering the cleaning hole; and / or The well flushing valve further comprises a second filter element arranged on the first valve core assembly, and the second filter element is used for filtering the liquid flowing from the cleaning channel to the liquid passage.

10. The well wash valve according to any one of claims 1-9, characterized in that The valve body comprises a first valve body and a second valve body connected together, the cleaning channel and the liquid passage extend from the first valve body to the second valve body respectively, and the first valve core assembly and the second valve core assembly are both arranged in the first valve body.

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