CN209942770U - Rodless pump positive and negative circulation well-flushing valve - Google Patents
Rodless pump positive and negative circulation well-flushing valve Download PDFInfo
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- CN209942770U CN209942770U CN201920619833.4U CN201920619833U CN209942770U CN 209942770 U CN209942770 U CN 209942770U CN 201920619833 U CN201920619833 U CN 201920619833U CN 209942770 U CN209942770 U CN 209942770U
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Abstract
The utility model discloses a rodless pump positive and negative circulation well washing valve, which comprises an upper joint and a lower joint which are connected, wherein a sliding sleeve is movably supported in the upper joint, a valve ball is movably arranged on a valve ball supporting surface in an inner cavity of the sliding sleeve, a well washing hole is arranged on the side wall of the sliding sleeve, and a well washing hole communicated with the well washing hole is arranged on the side wall of the upper joint; the lower end of the backwashing valve sleeve is provided with a central hole, the central hole is communicated with the outside of the backwashing valve sleeve through a backwashing well hole, a backwashing valve core matched with the backwashing valve seat surface on the end surface of the central hole is connected with a valve rod, the valve rod penetrates through the central hole and the backwashing valve sleeve and is connected with a valve rod seat arranged at the lower end of the sliding sleeve, and a spring is arranged between the valve rod seat and the backwashing valve sleeve; and the back washing valve sleeve is also provided with an axial hole which leads the inner cavity of the lower connector to be communicated with the inner cavity of the sliding sleeve. The well washing valve not only has a crude oil output channel, but also can open a reverse well washing channel and a forward well washing channel so as to ensure the normal output of crude oil and meet the requirements of forward and reverse well washing.
Description
Technical Field
The utility model relates to an oil field especially relates to a well-flushing valve with downhole tool.
Background
The well washing work of the oil well is one of the important work of daily management of an oil extraction team, so that the wax precipitation and scale formation of the oil pipe under the well can be reduced and eliminated, the inner wall of the oil pipe can be cleaned, the flow condition of a shaft can be improved, and the oil extraction efficiency can be improved; the well washing operation has two different basic modes of positive well washing and reverse well washing, wherein well washing liquid enters from an oil pipe and returns out from a sleeve pipe during positive well washing, and the reverse well washing is opposite, and liquid entering from the sleeve pipe returns out from the oil pipe; the well flushing valve is a common underground tool, can ensure the smoothness of a normal oil outlet channel during the production of an oil well, can switch a well flushing liquid channel for well flushing during well flushing operation, corresponds to a well flushing mode, generally comprises a forward well flushing valve and a reverse well flushing valve, needs to determine which well flushing valve is installed according to the well flushing mode determined by the oil well, and can only adopt the well flushing mode corresponding to the well flushing valve to carry out the well flushing operation after the well flushing valve is installed; because two well washing modes have characteristics, the selection of a specific well washing mode is determined according to different well washing purposes and production practical conditions in all aspects, for the same oil well, a single well washing mode cannot meet the actual production requirement for cleaning an underground oil pipe, a reverse well washing mode is possibly required to be adopted for well washing operation, a forward well washing mode is also required to be adopted for well washing operation, and accordingly, the conventional reverse well washing valve or the conventional forward well washing valve cannot meet the production requirement.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art exists, the utility model aims to solve the technical problem that a rodless pump positive and negative circulation well-flushing valve is provided, it not only has crude oil and produces the passageway, can open the back flush well passageway moreover, can open the well-flushing passageway again to guarantee the normal production of crude oil and satisfy the requirement of positive and negative well-flushing.
In order to solve the technical problem, the utility model discloses a positive and negative circulation well-flushing valve of rodless pump, including top connection and lower clutch, the cavity movable support of top connection has hollow sliding sleeve, be equipped with the valve bonnet of fretwork in the sliding sleeve cavity, the sliding sleeve cavity terminal surface relative with the valve bonnet lower extreme is the valve ball bearing surface, the activity is equipped with the valve ball between valve ball bearing surface and valve bonnet lower extreme, be equipped with sliding sleeve well-flushing hole on the sliding sleeve lateral wall above the valve ball bearing surface, be equipped with well-flushing hole on the top connection lateral wall, the sliding sleeve well-flushing hole can be led to with well-flushing hole after the sliding sleeve glides, be equipped with well-flushing hole sealing device between top connection inner wall and sliding sleeve, well-flushing hole lies in between two upper and lower well-flushing hole sealing device; a backwashing valve sleeve is connected between the upper connector and the lower connector, a central hole is formed in the lower end of the backwashing valve sleeve, the central hole is communicated with the outside of the backwashing valve sleeve through a backwashing well hole, the end face of the central hole is a backwashing valve seat face, a backwashing valve core matched with the backwashing valve seat face is connected with a valve rod, the valve rod penetrates through the central hole and the backwashing valve sleeve to be connected with a valve rod seat, the valve rod is in sealed movable connection with the backwashing valve sleeve, the valve rod seat is arranged at the lower end of the sliding sleeve, and a spring is arranged between the valve rod seat and the; the back washing valve sleeve is also provided with an axial hole, and the inner cavity of the lower connector is communicated with the inner cavity below the valve ball bearing surface in the sliding sleeve through the axial hole.
In the above structure, because the hollow sliding sleeve is movably supported in the inner cavity of the upper joint, the hollow valve cover is arranged in the inner cavity of the sliding sleeve, the end surface of the inner cavity of the sliding sleeve opposite to the lower end of the valve cover is a valve ball bearing surface, a valve ball is movably arranged between the valve ball bearing surface and the lower end of the valve cover, the side wall of the sliding sleeve above the valve ball bearing surface is provided with a sliding sleeve well-washing hole, the side wall of the upper joint is provided with a well-washing hole, the sliding sleeve well-washing hole can be communicated with the well-washing hole after the sliding sleeve slides downwards, a well-washing hole sealing device is arranged between the inner wall of the upper joint and the sliding sleeve, the well-washing hole is positioned between the upper well-washing hole sealing device and the lower well-washing hole sealing device, when well-washing liquid is injected from the oil pipe to carry out well-washing, the well-washing liquid with certain pressure acts on the valve ball through the hollow valve cover, so that the valve ball is attached to the passage of the oil pipe below the sliding sleeve, thereby open the well washing passageway and make the flushing fluid flow out from the sleeve pipe of oil pipe periphery after the oil pipe gets into, realize the well washing operation, the well washing sealing device who sets up has guaranteed that the flushing fluid can not leak between top connection and the sliding sleeve when just washing the well.
And because a backwash valve sleeve is connected between the upper connector and the lower connector, the lower end of the backwash valve sleeve is provided with a central hole, the central hole is communicated with the outside of the backwash valve sleeve through a backwash well hole, the end surface of the central hole is a backwash valve seat surface, a backwash valve core matched with the backwash valve seat surface is connected with a valve rod, the valve rod passes through the central hole and the backwash valve sleeve and is connected with a valve rod seat, the valve rod is in sealed movable connection with the backwash valve sleeve, the valve rod seat is arranged at the lower end of the sliding sleeve, a spring is arranged between the valve rod seat and the backwash valve sleeve, an axial hole is also arranged on the backwash valve sleeve, the inner cavity of the lower connector is communicated with the inner cavity below a valve ball bearing surface in the sliding sleeve through the axial hole, when flushing fluid is injected into the sleeve outside the oil pipe for backwashing, the flushing fluid enters into the central hole from the backwash hole and pushes the backwash valve core, after flowing out from the central hole, the flushing fluid pushes the valve ball upwards through the axial hole and through an inner cavity below the bearing surface of the valve ball in the sliding sleeve, and then flows out from the oil pipe through the hollow valve cover, so that a backwashing channel is opened to realize backwashing operation; when the oil well is provided with the check valve in the well-flushing valve lower part, the backwash valve core links to each other through valve rod and valve rod seat and can make the backwash valve core break away from with the backwash disk seat in time when the wash fluid pressure in the oil pipe promotes the sliding sleeve and descends when carrying out the well-flushing operation just, and the liquid that is in the oil pipe between backwash valve core and the check valve can follow the centre bore through backwash wellhole flow direction sleeve pipe to avoid being in the down formation resistance of the sliding sleeve of the liquid in the oil pipe between backwash valve core and the check valve, guaranteed that just wash the well passageway and can open smoothly. In the normal crude oil production process, crude oil output upwards from the lower part of the well washing valve pushes the backwashing valve core to press to the backwashing valve seat surface to block a passage between the backwashing valve core and the sleeve, the crude oil pushes the valve ball upwards from the axial hole through an inner cavity below the valve ball bearing surface in the sliding sleeve, then the crude oil is output from the oil pipe through the hollowed valve cover, and the sliding sleeve is also pushed to the upper part to break the passage between the well washing hole of the sliding sleeve and the sleeve, so that the normal production of the crude oil is ensured.
In conclusion, the technical scheme can not only have a crude oil production channel, but also conveniently open a reverse well washing channel and a forward well washing channel, thereby ensuring the normal production of crude oil and meeting the requirements of forward and reverse well washing.
The utility model discloses a preferred embodiment, this valve bonnet is the cover tube-shape, is equipped with the fretwork through-hole on the valve bonnet lateral wall of cover tube-shape. By adopting the embodiment, the valve cover has simple structure and convenient manufacture, can limit the moving range of the valve ball and ensure the normal circulation of crude oil or well-flushing liquid.
In another preferred embodiment of the present invention, the valve ball bearing surface is a side surface of a conical hole. By adopting the embodiment, the valve ball is supported by the conical hole, the valve ball is simple and convenient, the requirement on the dimensional precision of the valve ball is low, and the use effect is good.
In yet another preferred embodiment of the present invention, the sliding sleeve well-washing hole is located on the sliding sleeve sidewall above the valve housing. By adopting the embodiment, the well-flushing liquid can directly lead to the sleeve without passing through the valve cover during well forward flushing, and the well-flushing channel is smoother.
In a further preferred embodiment of the present invention, the well bore sealing means is a sealing ring fitted on the inner wall of the upper joint. By adopting the embodiment, the sealing ring is used for sealing the upper part and the lower part of the well hole to be cleaned, and the sealing requirement can be conveniently met.
In another preferred embodiment of the present invention, the backwash well bore is a radial through hole in a side wall of the backwash valve housing. By adopting the embodiment, the backwashing well hole can be processed by simple drilling, and the manufacturing is convenient.
In a further preferred embodiment of the present invention, the backwash valve element is a spherical valve element. By adopting the embodiment, the backwashing valve core can be manufactured by adopting a universal valve ball, and the manufacturing is convenient.
In a further preferred embodiment of the present invention, the backwash valve seat is a side surface of a conical hole. By adopting the embodiment, the side surface of the conical hole is used as the backwashing valve seat surface, so that the backwashing valve is simple and convenient, the requirement on the size precision of the backwashing valve core is low, and the using effect is good.
In a further preferred embodiment of the present invention, the spring is fitted to the valve rod. By adopting the embodiment, the space can be saved, and the valve rod can ensure the working stability of the spring.
Drawings
The present invention will be described in detail with reference to the drawings and the embodiments.
Fig. 1 is a schematic structural diagram of a specific embodiment of the rodless pump positive and negative circulation well flushing valve of the present invention.
In the figure: 1-upper joint, 2-sliding sleeve, 3-sliding sleeve well washing hole, 4-valve cover, 5-through hole, 6-normal well washing hole, 7-valve ball bearing surface, 8-normal well washing hole sealing device, 9-valve ball, 10-valve rod seat, 11-backwashing valve sleeve, 12-valve rod, 13-spring, 14-backwashing well hole, 15-center hole, 16-backwashing valve seat surface, 17-backwashing valve core, 18-axial hole and 19-lower joint.
Detailed Description
In the rodless pump positive and negative circulation well-flushing valve shown in fig. 1, the upper end of an upper joint 1 is a connector screwed with an oil pipe in an oil well, a hollow sliding sleeve 2 is movably supported in the inner cavity of the upper joint 1, the outer circumference of the sliding sleeve 2 is in sliding fit with the inner hole of the upper joint 1, a positive-flushing well hole sealing device 8 is arranged between the inner wall of the upper joint 1 and the sliding sleeve 2, the positive-flushing well hole sealing device 8 is a sealing ring embedded on the inner hole wall of the upper joint 1, the sealing ring can be an O-shaped sealing ring or a lip-shaped sealing ring, and the positive-flushing well sealing device 8 is provided with four positions in; a hollow valve cover 4 is arranged in the inner cavity of the sliding sleeve 2, the valve cover 4 is in a sleeve shape, the upper part of the valve cover is screwed with a connecting thread on the inner wall of the sliding sleeve 2, a through hole 5 which can make the valve cover 4 hollow is arranged on the side wall of the lower part of the sleeve-shaped valve cover 4, a liquid passing gap is arranged between the periphery of the valve cover 4 at the position of the through hole 5 and the inner cavity of the sliding sleeve 2, the end surface of the inner cavity of the sliding sleeve opposite to the lower end of the valve cover 4 is a valve ball bearing surface 7, the valve ball bearing surface 7 is a side surface of a conical hole, a valve ball 9 is movably arranged between the valve ball bearing surface 7 and the lower end of the valve cover 4, when the valve ball 9 falls onto the valve ball bearing surface 7, the lower cavity channel of the sliding sleeve 2 can be closed by being attached to the valve ball bearing surface 7, when the valve ball 9 moves upwards; the side wall of the sliding sleeve 2 above the valve ball bearing surface 7 is provided with a sliding sleeve well washing hole 3, the sliding sleeve well washing hole 3 is positioned on the side wall of the sliding sleeve 2 above the valve cover 4, the side wall of the upper connector 1 is provided with a well washing hole 6, the well washing hole 6 is positioned between an upper well washing hole sealing device and a lower well washing hole sealing device 8, and the sliding sleeve well washing hole 3 can be communicated with the well washing hole 6 after the sliding sleeve 2 slides downwards. The lower end of the lower joint 19 is provided with an interface screwed with a downhole tool at the bottom end of an oil well, which typically comprises a rodless pump, a check valve and the like; a backwashing valve sleeve 11 is connected between an upper connector 1 and a lower connector 19, the lower end of the backwashing valve sleeve 11 is provided with a central hole 15, the central hole 15 is communicated with the outside of the backwashing valve sleeve 11 through a backwashing well hole 14, the backwashing well hole 14 is a radial through hole on the side wall of the backwashing valve sleeve 11, the end surface of the central hole 15 is a backwashing valve seat surface 16, the backwashing valve seat surface 16 is a side surface of a conical hole, a backwashing valve core 17 matched with the backwashing valve seat surface 16 is a spherical valve core, the upper part of the backwashing valve core 17 is connected with a valve rod 12, the valve rod 12 passes through the central hole 15 and the backwashing valve sleeve 11 is connected with a valve rod seat 10, the valve rod seat 10 is arranged at the lower end of the sliding sleeve 2, a liquid passage is reserved between the valve rod seat 10 and an inner cavity at the lower part of the sliding sleeve 2, the valve rod 12 is movably connected with the backwashing valve sleeve 11 in a sealing, the backwashing valve core is attached to the backwashing valve seat surface 16, so that a channel between the central hole 15 and the inner cavity of the lower connector 19 is normally in a closed state; an axial hole 18 is also arranged on the backwashing valve sleeve 11, and the inner cavity of the lower joint 19 is communicated with the inner cavity below the valve ball bearing surface 7 in the sliding sleeve 2 through the axial hole 18 and a mounting hole of a spring 13 on the backwashing valve sleeve 11.
When the flushing fluid is injected into the oil pipe above the upper joint 1 for positive flushing, the flushing fluid with certain pressure acts on the valve ball 9 through the hollowed valve cover 4, so that the valve ball 9 is attached to the valve ball bearing surface 7 to close a passage below the sliding sleeve 2, the valve ball 9 pushes the valve sleeve 2 to move downwards to enable the sliding sleeve flushing hole 3 on the sliding sleeve 2 to be communicated with the positive flushing hole 6 on the upper joint, and therefore a positive flushing channel is opened, the flushing fluid can enter from the oil pipe and then flow out from a sleeve pipe on the periphery of the oil pipe, and positive flushing operation is achieved; when the lower part of a lower joint 19 of a well washing valve of an oil well is provided with a check valve, a valve rod 12 connected with a valve rod seat 10 can enable a backwashing valve core 17 to be timely separated from a backwashing valve seat surface 16 when a sliding sleeve 2 descends, liquid in an oil pipe between the backwashing valve core 17 and the check valve can flow to a sleeve pipe from a central hole 15 through a backwashing well hole 14, so that resistance of the liquid in the oil pipe between the backwashing valve core 17 and the check valve to the descending of the sliding sleeve 2 is avoided, and a forward well washing channel can be smoothly opened. When the flushing fluid is injected into a sleeve outside an oil pipe for backwashing, the flushing fluid enters the central hole 15 from the backwashing well hole 14 and pushes the backwashing valve core 17 to downwards run against the spring force of the spring 13, so that the backwashing valve core 17 is separated from the backwashing valve seat surface 16, the flushing fluid flows out of the central hole 15 and then upwards pushes the valve ball 9 through the axial hole 18 through an inner cavity below the valve ball bearing surface 7 in the sliding sleeve 2, and then flows out of the oil pipe from the inner cavity of the upper connector 1 through the hollow valve cover 4, so that a backwashing well channel is opened to realize backwashing operation. In the normal crude oil production process, crude oil output upwards from the lower part of the well washing valve pushes a backwashing valve core 17 to press a backwashing valve seat surface 16 to block a passage between the backwashing valve seat surface and the sleeve 2, the crude oil pushes a valve ball 9 upwards from an axial hole 18 through an inner cavity below a valve ball bearing surface 7 in the sliding sleeve 2, then the crude oil is output to an oil pipe from an inner cavity of the upper connector 1 through the hollowed valve cover 4, and the sliding sleeve 2 is also pushed to the upper part to break the passage between the sliding sleeve well washing hole 3 and the sleeve, so that the normal production of the crude oil is ensured.
The above description has been presented only for the purpose of illustrating certain preferred embodiments of the invention, and it is not to be taken as a limitation on the invention, as many modifications and variations are possible. If the backwash valve core 17 is not a spherical valve core, it may be a valve core in a truncated cone shape, and the truncated cone side surface of the truncated cone shape is correspondingly matched with the backwash valve seat surface 16; the backwash well bore 14 may be a bore in the side wall of the backwash valve sleeve 11 at an acute angle to the axial direction of the backwash valve sleeve 11, instead of a radial through-hole in the side wall of the backwash valve sleeve 11. Therefore, any improvement and changes made on the basis of the basic principle of the present invention should be considered as falling within the protection scope of the present invention.
Claims (9)
1. The utility model provides a positive and negative circulation well-flushing valve of rodless pump, includes top connection (1) and lower clutch (19), its characterized in that: a hollow sliding sleeve (2) is movably supported in an inner cavity of the upper connector (1), a hollowed valve cover (4) is arranged in the inner cavity of the sliding sleeve (2), a valve ball bearing surface (7) is arranged on the end surface of the inner cavity of the sliding sleeve opposite to the lower end of the valve cover (4), a valve ball (9) is movably arranged between the valve ball bearing surface (7) and the lower end of the valve cover (4), a sliding sleeve well washing hole (3) is arranged on the side wall of the sliding sleeve (2) above the valve ball bearing surface (7), a forward well washing hole (6) is arranged on the side wall of the upper connector (1), the sliding sleeve well washing hole (3) can be communicated with the forward well washing hole (6) after the sliding sleeve (2) slides downwards, a forward well washing hole sealing device (8) is arranged between the inner wall of the upper connector (1) and the sliding sleeve (2), and the forward well washing hole (6) is; a backwashing valve sleeve (11) is connected between the upper connector (1) and the lower connector (19), a central hole (15) is arranged at the lower end of the backwashing valve sleeve (11), the central hole (15) is communicated with the outside of the backwashing valve sleeve (11) through a backwashing well hole (14), the end surface of the central hole (15) is a backwashing valve seat surface (16), a backwashing valve core (17) matched with the backwashing valve seat surface (16) is connected with the valve rod (12), the valve rod (12) penetrates through the central hole (15) and the backwashing valve sleeve (11) to be connected with the valve rod seat (10), the valve rod (12) is in sealing movable connection with the backwashing valve sleeve (11), the valve rod seat (10) is arranged at the lower end of the sliding sleeve (2), a spring (13) is arranged between the valve rod seat (10) and the backwashing valve sleeve (11), an axial hole (18) is also arranged on the backwashing valve sleeve (11), and the inner cavity of the lower joint (19) is communicated with the inner cavity below the valve ball bearing surface (7) in the sliding sleeve (2) through the axial hole (18).
2. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the valve cover (4) is in a sleeve shape, and the side wall of the sleeve-shaped valve cover (4) is provided with a hollow through hole (5).
3. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the valve ball bearing surface (7) is the side surface of a conical hole.
4. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the sliding sleeve well washing hole (3) is positioned on the side wall of the sliding sleeve (2) above the valve cover (4).
5. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the well hole normal washing sealing device (8) is a sealing ring embedded on the inner hole wall of the upper joint (1).
6. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the backwashing well hole (14) is a radial through hole on the side wall of the backwashing valve sleeve (11).
7. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the backwashing valve core (17) is a spherical valve core.
8. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the backwash valve seat surface (16) is the side surface of the conical hole.
9. The rodless pump positive-negative circulation well flushing valve of claim 1, wherein: the spring (13) is sleeved on the valve rod (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619833.4U CN209942770U (en) | 2019-04-30 | 2019-04-30 | Rodless pump positive and negative circulation well-flushing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619833.4U CN209942770U (en) | 2019-04-30 | 2019-04-30 | Rodless pump positive and negative circulation well-flushing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209942770U true CN209942770U (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920619833.4U Active CN209942770U (en) | 2019-04-30 | 2019-04-30 | Rodless pump positive and negative circulation well-flushing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209942770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915052A (en) * | 2019-04-30 | 2019-06-21 | 江苏力克石油机械有限公司 | Rodless pump reverse circulation flushing valve |
-
2019
- 2019-04-30 CN CN201920619833.4U patent/CN209942770U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915052A (en) * | 2019-04-30 | 2019-06-21 | 江苏力克石油机械有限公司 | Rodless pump reverse circulation flushing valve |
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