Chemical flooding stepless regulation blanking plug and injection allocation device

Abstract

The invention relates to the technical field of oil field layered injection, in particular to a chemical flooding stepless regulation blanking plug and an injection allocation device. The chemical flooding stepless regulation blanking plug comprises a driving mechanism and a flow regulation mechanism which are connected with each other, the flow adjusting mechanism comprises an adjusting rod, an adjusting pipe and a core cylinder which are sequentially and coaxially arranged from inside to outside in a sleeving mode, one axial end of the core cylinder is a limited end which is limited, the other axial end of the core cylinder is a movable end which can move, and the movable end is connected with the adjusting rod; and the driving mechanism can drive the adjusting rod to move in the adjusting pipe in the axial direction of the adjusting pipe so as to drive the moving end to move, so that the middle part, located between the moving end and the limiting end, of the core barrel gradually bulges out or retracts in the direction away from the adjusting pipe. The chemical flooding stepless regulation blanking plug can realize stepless regulation of liquid flow in a liquid channel.

Description

Technical Field

[0001] The invention relates to the technical field of oil field stratified injection, in particular to a chemical drive stepless regulating plug and an injection device. Background Art

[0002] Chemical flooding and stratified injection is currently an important means to ensure long-term stable production, high production and improved recovery of oil fields, and the injection device is the core tool for chemical flooding and stratified injection technology in oil fields.

[0003] The dispensing device includes a dispensing device body and a blocking device. A liquid channel is provided in the dispensing device body. The liquid channel is provided with a liquid inlet and a liquid outlet. The blocking device is provided in the liquid channel, and a flow regulating mechanism of the blocking device is located between the liquid outlet and the liquid inlet. The blocking device can regulate the liquid flow in the liquid channel, and then regulate the flow at the liquid outlet. However, the existing blocking device has a limited range of regulating the liquid flow, and cannot achieve stepless regulation of the liquid flow. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem that the existing plugging device in the prior art cannot perform stepless regulation on the liquid flow.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a chemical drive stepless regulating plug, which includes a driving mechanism and a flow regulating mechanism connected to each other; the flow regulating mechanism includes an adjusting rod, an adjusting tube and a core tube coaxially sleeved from the inside to the outside, one axial end of the core tube is a limited end, and the other axial end of the core tube is a movable end that can move, and the movable end is connected to the adjusting rod; wherein the driving mechanism can drive the adjusting rod to move in the adjusting tube along the axial direction of the adjusting tube and then drive the movable end to move, so that the middle part of the core tube located between the movable end and the limited end gradually bulges or retracts in the direction away from the adjusting tube.

[0006] In some embodiments, the flow regulating mechanism further comprises a limiting ring, which is fixedly sleeved outside the regulating tube, and is located between the core barrel and the driving mechanism, and the limiting end of the core barrel abuts against the side of the limiting ring facing the core barrel.

[0007] In some embodiments, the flow regulating mechanism also includes an adjusting ring, which is movably mounted on the outside of the adjusting tube, the core tube is located between the adjusting ring and the limit ring, and the moving end is against the side of the adjusting ring facing the moving end; the adjusting tube is provided with a pair of long holes that penetrate the tube wall and are relatively arranged, and the length direction of the long holes is set along the axial direction of the adjusting tube; the adjusting rod is provided with a connecting piece that radially penetrates the adjusting rod, and the two ends of the connecting piece pass through the two long holes respectively and are connected to the adjusting ring respectively; when the core tube is in a natural state, one end of the long hole facing the driving mechanism is located between the limit end and the moving end, and the moving end of the core tube is located between the two ends in the length direction of the long hole.

[0008] In some embodiments, the adjusting ring, the limiting ring, the core barrel, the long hole and the connecting piece constitute an adjusting core structure; and a plurality of adjusting core structures are arranged at intervals along the axial direction of the adjusting tube.

[0009] In some embodiments, when the core barrel is in the original state, in the radial direction of the core barrel, the inner wall of the core barrel is recessed toward the outer wall of the core barrel; in the axial direction of the core barrel, the thickness from both ends of the core barrel to the middle part of the core barrel gradually becomes thinner.

[0010] In some embodiments, a snap-fit ​​structure capable of being radially released or retracted is provided in the driving mechanism, and the snap-fit ​​structure is used to snap-fit ​​with a snap-fit ​​groove in the liquid channel.

[0011] In some embodiments, a boss is provided on the docking rod; the connecting sleeve cooperates with the docking rod through a second threaded structure; when the docking rod is rotated circumferentially, the second threaded structure can make the docking rod make an axial movement opposite to the moving direction of the adjusting rod; a pair of radially opposite card interfaces are provided on the mounting shell; a pair of rotatable cams are also provided on the mounting shell, the boss is located between the cam and the connecting sleeve, the axes of the rotating shafts of the two cams are perpendicular to the axis of the docking rod, the cams are distributed on both radial sides of the docking rod, and the cams have a driving part facing the docking rod and a card connecting part facing away from the docking rod; the card connecting interface corresponds to the card connecting part one by one, and the cam is connected to the elastic component so that the card connecting part of the cam is biased to the outside of the mounting shell; the boss, the cam, the card connecting interface and the elastic component form a card connecting structure; when the boss moves toward the cam, the boss can drive the driving part of the cam to rotate clockwise, so that the card connecting part of the cam is transferred into the mounting shell through the corresponding card interface.

[0012] In some embodiments, a boss is provided on the docking rod; the connecting sleeve cooperates with the docking rod through a second threaded structure; when the docking rod is rotated circumferentially, the second threaded structure can make the docking rod make an axial movement opposite to the moving direction of the adjusting rod; a pair of rotatable cams are provided on the mounting shell, the boss is located between the cam and the connecting sleeve, the axes of the rotating shafts of the two cams are perpendicular to the axis of the docking rod, the cams are distributed on both radial sides of the docking rod, and the cams have a driving part facing the docking rod and a clamping part facing away from the docking rod; the cam is connected to the elastic component so that the clamping part of the cam is biased to the outside of the mounting shell; when the boss moves toward the cam, the boss can drive the driving part of the cam to rotate clockwise so that the clamping part of the cam is rotated into the mounting shell.

[0013] In some embodiments, a first limiting portion is provided in the center ring of the mounting shell, a second limiting portion is provided at one end of the adjusting tube facing the connecting sleeve, and the connecting sleeve is clamped between the first limiting portion and the second limiting portion to limit the axial movement of the connecting sleeve.

[0014] Another aspect of the present invention provides an injection device, which includes the above-mentioned chemical drive stepless adjustment plug.

[0015] The technical solution of the present invention has the following technical effects compared with the prior art:

[0016] The driving mechanism can drive the adjustment rod to move, and the adjustment rod will further drive the moving end of the core barrel to move toward the limiting end of the core barrel. The position of the limiting end of the core barrel is restricted and cannot move, and the spacing between the limiting end and the moving end gradually decreases, and the moving end and the limiting end will squeeze the area between the two, so that the middle part of the core barrel produces a continuous deformation that bulges outward. When the plug is installed in the liquid channel, since the deformation of the middle part of the core barrel to bulge outward is a continuous linear change, the radial size of the flow regulating structure will change continuously, and the spacing between the flow regulating mechanism and the side wall of the liquid channel will also change continuously, and the liquid flow in the liquid channel will also change continuously, so the chemical drive stepless adjustment plug can achieve stepless regulation of the liquid flow in the liquid channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a longitudinal cross-sectional schematic diagram of a chemical flooding stepless regulating plugging device in one embodiment of the present invention;

[0018] Figure 2 is a schematic longitudinal section diagram of a core barrel bulging outward in one embodiment of the present invention;

[0019] Figure 3 is a schematic longitudinal section diagram of an adjusting core structure in one embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the installation of a cam in one embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of the installation of a torsion spring in one embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the installation of a chemical drive stepless adjustment plug in one embodiment of the present invention.

[0023] Description of Reference Numerals

[0024] 10. Driving mechanism; 11. Docking rod; 111. Boss; 112. Spring seat; 12. Connecting sleeve; 121. First sealing ring; 13. Mounting shell; 131. Limit block; 132. End cover; 133. Sealing block; 134. Card interface; 135. Second sealing ring; 14. Cam; 141. Driving part; 142. Card connection part; 143. Torsion spring; 144. Rotating shaft; 20. Flow regulating mechanism; 21. Adjusting rod; 22. Adjusting tube; 23. Core barrel; 231. Limiting end; 232. Moving end; 24. Limiting ring; 25. Adjusting ring; 26. Long hole; 27. Connecting piece; 28. Centralizer; 30. Dispenser body; 31. Liquid channel; 32. Liquid inlet; 33. Liquid outlet; 34. Card slot. DETAILED DESCRIPTION

[0025] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention, rather than to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0026] like Figures 1 to 3 As shown, the present invention provides a chemical drive stepless regulating plug, which includes a driving mechanism 10 and a flow regulating mechanism 20 connected to each other; the flow regulating mechanism 20 includes an adjusting rod 21, an adjusting tube 22 and a core barrel 23 coaxially sleeved from the inside to the outside, one axial end of the core barrel 23 is a limited limit end 231, and the other axial end of the core barrel 23 is a movable moving end 232, and the moving end 232 is connected to the adjusting rod 21; wherein the driving mechanism 10 can drive the adjusting rod 21 to move in the adjusting tube 22 along the axial direction of the adjusting tube 22 and then drive the moving end 232 to move, so that the middle part of the core barrel 23 located between the moving end 232 and the limit end 231 gradually bulges out or retracts in the direction away from the adjusting tube 22.

[0027] Specifically, the flow regulating mechanism 20 is used to regulate the flow in the liquid channel 31, and the driving mechanism 10 is used to control the actions of the various components in the flow regulating mechanism 20. The driving mechanism 10 can be a device commonly used in the art for cooperating with the flow regulating mechanism 20. The axes of the regulating rod 21, the regulating tube 22 and the core tube 23 extend in the same direction. The regulating tube 22 is connected to the driving mechanism 10. The regulating tube 22 is a hollow tube structure, and the regulating tube 22 is sleeved on the outside of the regulating rod 21, and the regulating rod 21 is inserted into the regulating tube 22 along the axial direction of the regulating tube 22. Of course, the diameter of the regulating rod 21 is smaller than the diameter of the regulating tube 22 to allow the regulating rod 21 to move smoothly. Preferably, one end of the regulating rod 21 facing away from the driving mechanism 10 is located in the regulating tube 22. The regulating rod 21 is connected to the driving mechanism 10, and the driving mechanism 10 can drive the regulating rod 21 to move along the axial direction of the regulating tube 22 in the regulating tube 22. The core barrel 23 is a cylindrical structure, and the inner diameter of the core barrel 23 is larger than the outer diameter of the adjusting tube 22, so the core barrel 23 is movably sleeved on the outside of the adjusting tube 22. The outside of the adjusting tube 22 can limit the movement of the limit end 231 by installing a limiter, and the limit end 231 can also be directly fixed on the adjusting tube 22, which is not limited by the present invention. One end of the core barrel 23 faces the driving mechanism 10, and the other end of the core barrel 23 faces away from the driving mechanism 10. Preferably, the end of the core barrel 23 facing the driving mechanism 10 is the limit end 231, and the end of the core barrel 23 facing away from the driving mechanism 10 is the moving end 232. The position of the limit end 231 is limited, and the limit end 231 is not allowed to move toward the driving mechanism 10 when the core barrel 23 is deformed, and the moving end 232 can move toward the driving mechanism 10. Preferably, the core barrel 23 can be made of a corrosion-resistant and elastic material, such as a rubber material or a thermoplastic plastic material. Preferably, the length of the core barrel 23 is not greater than the length of the adjusting rod 21.

[0028] In this embodiment, the driving mechanism 10 can drive the adjusting rod 21 to move, and the adjusting rod 21 will further drive the moving end 232 of the core barrel 23 to move toward the limiting end 231 of the core barrel 23. The position of the limiting end 231 of the core barrel 23 is restricted and cannot move. The spacing between the limiting end 231 and the moving end 232 gradually decreases, and the moving end 232 and the limiting end 231 will squeeze the area between the two, so that the middle part of the core barrel 23 produces a continuous deformation that bulges outward. When the plug is installed in the liquid channel 31, since the deformation of the middle part of the core barrel 23 to bulge outward is a continuous linear change, the radial size of the flow regulating structure will be continuously changed, and the spacing between the flow regulating mechanism 20 and the side wall of the liquid channel 31 will also be continuously changed. The liquid flow in the liquid channel 31 will also be continuously changed, so the chemical drive stepless adjustment plug can realize the stepless adjustment of the liquid flow in the liquid channel 31. When the adjustment is completed, the driving mechanism 10 can drive the adjusting rod 21 to move in the reverse direction, and the adjusting rod 21 drives the moving end 232 of the core tube 23 to move in the reverse direction, and the moving end 232 moves away from the limiting end 231. The middle part of the core tube 23 located between the moving end 232 and the limiting end 231 retracts and expands toward the adjusting tube 22, and the deformation of the core tube 23 gradually recovers.

[0029] like Figures 1 to 3 As shown, in some embodiments of the present invention, the flow regulating mechanism 20 also includes a limiting ring 24, which is fixedly mounted on the outside of the regulating tube 22, and the limiting ring 24 is located between the core barrel 23 and the driving mechanism 10, and the limiting end 231 of the core barrel 23 abuts against the side of the limiting ring 24 facing the core barrel 23.

[0030] Specifically, the limiting ring 24 is an annular structure. The end of the core barrel 23 facing the driving mechanism 10 is the limiting end 231, and the end of the core barrel 23 facing away from the driving mechanism 10 is the moving end 232. The driving mechanism 10 can pull the adjusting rod 21 to move toward the driving mechanism 10 so that the moving end 232 moves toward the limiting end 231. When the moving end 232 moves toward the limiting end 231, the limiting end 231 abuts against the side of the limiting ring 24 facing the core barrel 23 and cannot move, so that the core barrel 23 can produce a continuous outward bulging deformation. Preferably, the radial thickness of the limiting ring 24 is greater than the radial thickness of the core barrel 23 to enhance the limiting effect. Preferably, the limiting ring 24 can be connected to the adjusting tube 22 by a fixing pin. In this embodiment, when the core barrel 23 is in a naturally undeformed state, the limiting end 231 and the limiting ring 24 may only be in contact but not connected; as long as the moving end 232 moves toward the limiting end 231, the limiting end 231 can be pressed against the limiting ring 24. And because the limiting ring 24 and the core barrel 23 are independent components, the two can be disassembled and assembled separately, which helps to simplify the flow regulating mechanism 20. However, in some other embodiments, the limiting end 231 can be fixedly connected to the limiting ring 24. In some other embodiments, the limiting end 231 of the core barrel 23 can also be limited by other fixings, such as screws.

[0031] In other embodiments, the end of the core barrel 23 facing away from the driving mechanism 10 may be a limit end 231, and the end of the core barrel 23 facing the driving mechanism 10 may be a movable end 232. The driving mechanism 10 may push the adjustment rod 21 away from the driving mechanism 10 to move toward it, so that the movable end 232 moves toward the limit end 231.

[0032] like Figures 1 to 3 As shown, in some embodiments of the present invention, the flow regulating mechanism 20 also includes an adjusting ring 25, which is movably sleeved on the outside of the adjusting tube 22, the core tube 23 is located between the adjusting ring 25 and the limit ring 24, and the moving end 232 is against the side of the adjusting ring 25 facing the moving end 232; the adjusting tube 22 is provided with a pair of long holes 26 that penetrate the tube wall and are oppositely arranged, and the length direction of the long holes 26 is set to be along the axial direction of the adjusting tube 22; the adjusting rod 21 is provided with a connecting piece 27 that radially penetrates the adjusting rod 21, and the two ends of the connecting piece 27 respectively pass through the two long holes 26 in a one-to-one manner and are respectively connected to the adjusting ring 25; when the core tube 23 is in a natural state, one end of the long hole 26 facing the driving mechanism 10 is located between the limit end 231 and the moving end 232, and the moving end 232 of the core tube 23 is located between the two ends of the long hole 26 in the length direction.

[0033] Specifically, the adjusting ring 25 is an annular structure, and the inner diameter of the adjusting ring 25 is slightly larger than the outer diameter of the adjusting tube 22, so that the adjusting ring 25 can move smoothly along the adjusting tube 22. The moving end 232 of the core barrel 23 can be against the side of the adjusting ring 25 facing the core barrel 23, and the moving end 232 of the core barrel 23 can also be fixedly connected to the side of the adjusting ring 25 facing the core barrel 23. The long hole 26 is arranged on the side wall of the adjusting tube 22, and the length direction of the long hole 26 is consistent with the axis of the adjusting tube 22. One end of the long hole 26 faces the driving mechanism 10, and the other end of the long hole 26 faces away from the driving mechanism 10. When the core barrel 23 is in a natural state, one end of the long hole 26 is located between the moving end 232 and the limiting end 231, and the other end of the long hole 26 is located between the moving end 232 and the end of the adjusting tube 22 facing away from the driving mechanism 10. In other words, when the core barrel 23 is in a natural state, one end of the long hole 26 is located between the limiting ring 24 and the adjusting ring 25, and the other end of the long hole 26 is located between the adjusting ring 25 and the end of the adjusting tube 22 facing away from the driving mechanism 10. A radial through hole is provided in the adjusting rod 21, and the connecting rod is installed in the through hole. And the middle part of the connecting member 27 is located in the through hole, and the two ends of the connecting member 27 are located outside the through hole. The two ends of the connecting member 27 extend from a corresponding long hole 26 respectively, and both ends of the connecting member 27 are connected to the adjusting ring 25. In this embodiment, the driving mechanism 10 can drive the adjusting rod 21 to move toward the driving mechanism 10, and the adjusting rod 21 drives the connecting member 27 to move in the long hole 26, and the connecting member 27 will further drive the moving end 232 of the core barrel 23 to move toward the limiting end 231. Preferably, the connecting member 27 adopts a pin. In this embodiment, when the core barrel 23 is in a naturally undeformed state, the movable end 232 and the adjusting ring 25 may not be connected; as long as the movable end 232 moves toward the limiting end 231, the movable end 232 can be pressed against the adjusting ring 25. Since the adjusting ring 25 and the core barrel 23 are independent components, the two can be disassembled and assembled separately, which helps to simplify the flow regulating mechanism 20.

[0034] In other embodiments, one end of the adjusting rod 21 facing away from the driving mechanism 10 is provided with a connecting component, which extends from one end of the adjusting tube 22 facing away from the driving mechanism 10 and is connected to the moving end 232, so that the adjusting rod 21 can control the core barrel 23. Of course, there can be other connection modes between the adjusting rod 21 and the core barrel 23, which will not be listed one by one in the present invention.

[0035] In some embodiments of the present invention, the adjusting ring 25, the limiting ring 24, the core tube 23, the long hole 26 and the connecting piece 27 constitute an adjusting core structure. Along the axial direction of the adjusting tube 22, a plurality of adjusting core structures are arranged at intervals, thereby helping to expand the adjustment range of the liquid flow in the liquid channel 31.

[0036] In some embodiments of the present invention, when the core barrel 23 is in the original state, in the radial direction of the core barrel 23, the inner wall of the core barrel 23 is recessed toward the outer wall of the core barrel 23; in the axial direction of the core barrel 23, the thickness from the two ends of the core barrel 23 to the middle part of the core barrel 23 gradually becomes thinner.

[0037] Specifically, in the original state, the core barrel 23 is naturally unfolded. In the axial direction, the core barrel 23 is thick at both ends and gradually thin in the middle; and in the natural state, in the axial cross-sectional view of the core barrel 23, the inner side wall of the core barrel 23 is a curve that bends inward. This structure allows the core barrel 23 to always bulge outward when squeezed, avoiding the situation where the middle part of the core barrel 23 bulges inward. Preferably, the hardness of the movable end 232 and the limit end 231 is greater than the hardness of the middle part of the two, which is more conducive to the directional deformation of the core barrel 23.

[0038] like Figure 1 to Figure 2 As shown, in some embodiments of the present invention, a centralizer 28 is provided at one end of the adjusting tube 22 facing away from the driving mechanism.

[0039] Specifically, when installing the chemical drive stepless regulating plug, the centralizer 28 can prevent the chemical drive stepless regulating plug from tilting and getting stuck in the liquid inlet 33 of the liquid channel 31. The centralizer 28 is a common device in the art, and the present invention will not repeat its mechanism and principle.

[0040] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the driving mechanism 10 includes a docking rod 11, a connecting sleeve 12 and a mounting shell 13 which are in the same direction as the axis of the adjusting rod 21. The mounting shell 13 is connected to the adjusting tube 22, the docking rod 11 is connected to the connecting sleeve 12, the connecting sleeve 12 is connected to the adjusting rod 21 through a first threaded structure, the mounting shell 13 is sleeved on the outside of the docking rod 11 and the connecting sleeve 12, and the connecting sleeve 12 is configured to be able to rotate circumferentially and to be restricted in axial movement. When the docking rod 11 is rotated circumferentially, the first threaded structure enables the adjusting rod 21 to move along the axial direction of the adjusting tube 22.

[0041] Specifically, the mounting shell 13 is configured as a shell having a hollow chamber. The outer diameters of the docking rod 11 and the connecting sleeve 12 are smaller than the inner diameter of the mounting shell 13, so that the docking rod 11 and the connecting sleeve 12 can move along the mounting shell 13. The mounting shell 13 is axially in the same direction as the adjusting tube 22, so one end of the mounting shell 13 faces the adjusting tube 22, and the other end of the mounting shell 13 faces away from the adjusting tube 22. The end of the mounting shell 13 facing the adjusting tube 22 is connected to the end of the mounting shell 13 of the adjusting tube 22, so that there is no relative movement between the two. The connecting sleeve 12 can be limited in axial movement by a limiting component, but the connecting sleeve 12 can rotate circumferentially in the mounting shell 13.

[0042] In this embodiment, when the docking rod 11 is rotated, the docking rod 11 drives the connecting sleeve 12 to rotate circumferentially, but the connecting piece 27 on the adjusting rod 21 is limited by the long hole 26, so that the adjusting rod 21 cannot rotate circumferentially. At the same time, since the connecting sleeve 12 is limited in the axial direction, the circumferential rotation of the connecting sleeve 12 is converted by the first thread structure into the adjusting rod 21 moving axially along the adjusting tube 22, and the adjusting rod 21 drives the core tube 23 to deform or restore the deformation. This structure is simple, so that the driving mechanism 10 and the chemical drive stepless adjustment plugging device are compact in structure. Of course, the long hole 26 can also limit the stroke of the adjusting rod 21 to avoid the disconnection between the adjusting rod 21 and the connecting sleeve 12.

[0043] In some embodiments, a first mounting groove may be provided at one end of the connecting sleeve 12 facing the adjusting rod 21, the opening of the first mounting groove faces the adjusting rod 21, and a first internal thread is provided on the inner wall of the first mounting groove; a first external thread is provided on the side of the adjusting rod 21 facing one end of the driving mechanism 10, the end of the adjusting rod 21 extends into the first mounting groove, and the first internal thread is threadedly matched with the first external thread. In other embodiments, a first mounting groove may be provided at one end of the adjusting rod 21 facing the adjusting rod 21, the opening of the first mounting groove faces the connecting sleeve 12, and a first internal thread is provided on the inner wall of the first mounting groove; a first external thread is provided on the side of the connecting sleeve 12 facing one end of the adjusting rod 21, the end of the connecting sleeve 12 extends into the first mounting groove, and the first internal thread is threadedly matched with the first external thread. In the above embodiments, the first mounting groove, the first internal thread and the first external thread constitute a first thread structure. Of course, the first thread structure can also adopt other structural forms, which are not listed one by one in the present invention. Preferably, the length of the long hole 26 is less than.

[0044] In some embodiments, the inner diameter of the mounting shell 13 is larger than the outer diameter of the adjusting tube 22, a third internal thread is provided on the radial inner side of one end of the mounting shell 13 facing the adjusting tube 22, and a third external thread is provided on the radial outer side of one end of the adjusting tube 22 facing the mounting shell 13, and the third internal thread and the third external thread are threadedly connected to make the adjusting tube 22 and the mounting shell 13 detachable. The mounting shell 13 and the adjusting tube 22 can be further fixed by a pin to prevent the adjusting tube 22 from being separated from the mounting shell 13. Of course, the mounting shell 13 and the adjusting tube 22 can also be connected by other means, such as welding, which is not limited by the present invention.

[0045] In some embodiments of the present invention, a snap-fit ​​structure capable of being radially released or retracted is provided in the drive mechanism 10 , and the snap-fit ​​structure is used to snap-fit ​​with the snap-fit ​​groove 34 in the liquid channel 31 .

[0046] Specifically, when the chemical drive stepless regulating plug needs to be installed in the liquid channel 31, the clamping structure is released so that the clamping structure can be clamped into the clamping slot 34. When the chemical drive stepless regulating plug needs to be taken out, the clamping structure is retracted and the clamping structure is disengaged from the clamping slot 34. Of course, the clamping structure can be a common clamping device in the art, such as a single cam clamping structure, and the docking structure and principle of the present invention will not be described in detail.

[0047] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments of the present invention, a boss 111 is provided on the docking rod 11. The connecting sleeve 12 cooperates with the docking rod 11 through a second threaded structure; when the docking rod 11 is rotated circumferentially, the second threaded structure can make the docking rod 11 move axially in the opposite direction of the movement of the adjustment rod 21. A pair of radially opposite card interfaces 134 are provided on the mounting shell 13; a pair of rotatable cams 14 are also provided on the mounting shell 13, the boss 111 is located between the cam 14 and the connecting sleeve 12, the axes of the rotating shafts of the two cams 14 are perpendicular to the axis of the docking rod 11, the cams 14 are distributed on both radial sides of the docking rod 11, the cams 14 have a driving part 141 facing the docking rod 11 and a card connection part 142 facing away from the docking rod 11; the card interface 134 corresponds to the card connection part 142 one by one, and the cam 14 is connected to the elastic component so that the card connection part 142 of the cam 14 is biased to the outside of the mounting shell 13. The boss 111, the cam 14, the card interface 134 and the elastic component form a card connection structure. When the boss 111 moves toward the cam 14, the boss 111 can drive the driving part 141 of the cam 14 to rotate clockwise, so that the card connection part 142 of the cam 14 is rotated into the installation shell 13 through the corresponding card interface 134.

[0048] Specifically, the axial movement of the connecting sleeve 12 is restricted, so when the docking rod 11 is rotated, the second threaded structure can convert the circumferential rotation of the docking rod 11 into the axial movement of the docking rod 11, so that the boss 111 can move toward or away from the cam 14, thereby realizing the control of the cam 14. The tightening direction and loosening direction of the first threaded structure and the second threaded structure are the same. The rotating shafts 144 of the two cams 14 are located on both sides of the radial direction of the docking rod 11, and the axes of the rotating shafts 144 are perpendicular to the axes of the docking rod 11, and the cams 14 can rotate around the corresponding rotating shafts 144. Relative to the clamping portion 142, the driving portion 141 of the cam 14 is closer to the docking rod 11; relative to the driving portion 141, the clamping portion 142 of the cam 14 is away from the docking rod 11. A pair of clamping interfaces 134 are also provided on the mounting shell 13, and the two clamping interfaces 134 are distributed on both sides of the radial direction of the docking rod 11, and the two clamping interfaces 134 correspond to the clamping portions 142 of the two cams 14 one by one. The clamping portion 142 can be rotated out of the mounting shell 13 or rotated into the mounting shell 13 from the corresponding clamping interface 134. The radial dimension of the boss 111 is greater than the spacing between the driving portions 141 of the two cams 14, so that the boss 111 can contact the two driving portions 141. Preferably, in the direction from the connecting sleeve 12 to the docking rod 11, the diameter of the end of the boss 111 facing the cam 14 gradually decreases, so the end of the boss 111 facing the cam 14 has an inclined surface, which can fit with the driving portion 141, avoiding the part of the bump that contacts the driving portion 141 from being too sharp and easily damaged. The elastic force of the elastic component makes the clamping portion 142 of the cam 14 located outside the mounting shell 13 in a natural state.

[0049] The side wall of the liquid channel 31 is usually provided with a groove 34 for clamping the chemical drive stepless adjustment plug. In this embodiment, the docking rod 11 is rotated in the loosening direction of the second threaded structure, the docking rod 11 moves in the direction away from the connecting sleeve 12, the boss 111 drives the driving part 141 of the cam 14 to rotate, and the clamping part 142 of the cam 14 is recovered into the installation shell 13, and the chemical drive stepless adjustment plug can be installed in the liquid channel 31. Then the docking rod 11 is rotated in the tightening direction of the second threaded structure, the docking rod 11 moves in the direction close to the connecting sleeve 12, the boss 111 is disengaged from the driving part 141, the clamping part 142 of the cam 14 is rotated out of the installation shell 13 under the elastic force of the elastic component, and the clamping part 142 of the cam 14 is clamped into the groove 34 on the side wall of the liquid channel 31. Therefore, the boss 111, the card interface 134, the elastic component, the rotating shaft 144 and the cam 14 constitute a card connection structure, through which the chemical drive stepless adjustment plug is carded in the liquid channel 31. And the card connection structure adopts a double cam structure, so that the chemical drive stepless adjustment plug can squeeze the groove wall of the card groove 34 on both sides of the radial direction, so that the position of the chemical drive stepless adjustment plug is very firm.

[0050] In some embodiments, the end of the connecting sleeve 12 facing the docking rod 11 is provided with a second mounting groove, the opening of the second mounting groove faces the docking rod 11, and the inner wall of the second mounting groove is provided with a second internal thread; the side of the docking rod 11 facing the end of the connecting sleeve 12 is provided with a second external thread, this end of the docking rod 11 penetrates into the second mounting groove, and the second internal thread is threadedly matched with the second external thread. In some other embodiments, the end of the docking rod 11 facing the connecting sleeve 12 is provided with a second mounting groove, the opening of the second mounting groove faces the connecting sleeve 12, and the inner wall of the second mounting groove is provided with a second internal thread; the side of the connecting sleeve 12 facing the end of the docking rod 11 is provided with a second external thread, this end of the connecting sleeve 12 penetrates into the second mounting groove, and the second internal thread is threadedly matched with the second external thread. In the above embodiments, the second mounting groove, the second internal thread and the second external thread constitute a second thread structure. Of course, the first thread structure can also adopt other structural forms, which are not listed one by one in the present invention.

[0051] In some embodiments, Figure 5 As shown, the elastic component can be a torsion spring 143 installed on the rotating shaft 144. The main body of the torsion spring 143 is sleeved on the rotating shaft 144; one leg of the torsion spring 143 is a fixed leg, which is fixedly connected to the mounting shell 13; the other leg of the torsion spring 143 is a driving leg, which is connected to the clamping portion 142 of the cam 14. The driving leg and the fixed leg are in a contracted state, so the driving leg applies a force toward the radial outer side of the mounting shell 13 to the clamping portion 142, so that the clamping portion 142 of the cam 14 is located outside the mounting shell 13 in a force balance state. When the docking rod 11 moves in a direction away from the connecting sleeve 12, the boss 111 will push the driving portion 141 of the cam 14 to rotate clockwise, thereby driving the clamping portion 142 to rotate clockwise, and the clamping portion 142 gradually rotates into the mounting shell 13; at this time, the torsion spring 143 is in a further contracted state, and the angle between the two legs of the torsion spring 143 becomes smaller. When the docking rod 11 moves toward the connecting sleeve 12, the boss 111 is out of contact with the driving portion 141 of the cam 14, the torsion spring 143 is deformed and restored, and the driving leg of the torsion spring 143 applies a force toward the radial outer side of the mounting shell 13 to the clamping portion 142, so that the clamping portion 142 rotates counterclockwise and rotates out to the outside of the mounting shell 13. Preferably, the torsion springs 143 are respectively installed on both axial sides of each cam 14, so that the state of the clamping portion 142 of the cam 14 extending out of the clamping interface 134 can be more stable.

[0052] In some other embodiments, the elastic component can be a linear spring. The driving parts 141 of the two cams 14 are connected by a linear spring, which is in a tensioned state and in a mechanical equilibrium state, and the linear spring applies a force to the rotating shaft 144 toward the radial inner side of the mounting shell 13. When the tension of the linear spring and the gravity of the cam 14 are balanced, the clamping part 142 of the cam 14 is located outside the mounting shell 13. When the docking rod 11 moves in the direction away from the connecting sleeve 12, the boss 111 will push the driving part 141 of the cam 14 to rotate clockwise, thereby driving the clamping part 142 to rotate clockwise, and the clamping part 142 gradually rotates into the mounting shell 13; at this time, the linear spring is in a further tensioned state. When the docking rod 11 moves in the direction toward the connecting sleeve 12, the linear spring contracts and returns to a force equilibrium state, and the clamping part 142 of the cam 14 rotates out to the outside of the mounting shell 13. Of course, the present invention may also use other elastic components to bias the clamping portion 142 of the cam 14 to the outside of the mounting shell 13, and the present invention will not list them one by one.

[0053] In some embodiments of the present invention, a first limiting portion is provided in the center ring of the mounting shell 13, and a second limiting portion is provided at one end of the adjusting tube 22 facing the connecting sleeve 12. The connecting sleeve 12 is clamped between the first limiting portion and the second limiting portion to limit the axial movement of the connecting sleeve 12.

[0054] Specifically, the first limiting portion can limit the connection sleeve 12 from moving toward the docking rod 11 , and the second limiting portion can limit the connection sleeve 12 from moving toward the adjustment rod 21 .

[0055] In some embodiments, Figure 1 and Figure 2 As shown, the first limiting part is a limiting block 131 arranged in a ring in the mounting shell 13. The limiting block 131 is located between the connecting sleeve 12 and the boss 111. The radial outer side of the limiting block 131 is in contact with the inner wall of the mounting shell 13, and the inner diameter of the limiting block 131 is smaller than the outer diameter of the connecting sleeve 12. The docking rod 11 is connected to the connecting sleeve 12 after passing through the limiting block 131. One end of the connecting sleeve 12 facing the docking rod 11 contacts one side of the limiting block 131 facing the connecting sleeve 12. The second limiting part is set as a limiting groove, which is located at one end of the adjusting tube 22 facing the mounting shell 13. The connecting sleeve 12 is inserted into the limiting groove, and one end of the connecting sleeve 12 facing the limiting groove contacts the bottom wall of the limiting groove, and the adjusting tube 22 passes through the bottom wall and is connected to the connecting sleeve 12. Of course, the first limiting part and the second limiting part ring can adopt other structural forms, and the present invention is not limited thereto.

[0056] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, in some embodiments of the present invention, a sealing block 133 is provided on the inner wall of the mounting shell 13, and the sealing block 133 surrounds the connecting sleeve 12; in other words, the connecting sleeve 12 is movably inserted into the radial inner side of the sealing block 133 and can also rotate circumferentially. The sealing block 133 can be connected to the side of the limit block 131 facing the connecting sleeve 12. The first sealing ring 121 is provided between the connecting sleeve 12 and the sealing block 133. The first sealing ring 121 and the sealing block 133 can prevent contaminants from entering the position of the cam 14 along the inside of the regulating tube 22. The first sealing ring 121 can also reduce the friction of the connecting sleeve 12 when it rotates. Preferably, a groove for installing the first sealing ring 121 is provided on the outer wall of the connecting sleeve 12. Preferably, two or more first sealing rings 121 are provided at intervals along the axial direction of the connecting sleeve 12.

[0057] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, an end cap 132 is installed at one end of the mounting shell 13 facing away from the flow regulating mechanism 20, and the end cap 132 is threadedly connected to the mounting shell 13, and one end of the docking rod 11 facing away from the connecting sleeve 12 extends from the end cap 132. A spring seat 112 is also provided on the docking rod 11, and the spring seat 112 is located between the cam 14 and the end cap 132. The spring seat 112 circumferentially surrounds the docking rod 11. The spring seat 112 is arranged in a stepped shape, and the outer diameter of the first step of the spring seat 112 facing the cam 14 is greater than the outer diameter of the first step of the spring seat 112 facing the end cap 132. A compression spring is sleeved on the docking rod 11, and the first end of the compression spring is pressed against the end cap 132, and the second end of the compression spring is sleeved on the first step of the spring seat 112 facing the end cap 132, and the second end of the compression spring is pressed against the first step of the spring seat 112 facing the connecting sleeve. The compression spring is used to limit the travel of the docking rod 11 to prevent the docking rod 11 from excessively moving toward the end cover 132 .

[0058] Combine the following Figure 1 and Figure 2 The operation process of the chemical flooding stepless regulating plug of the present invention is described again. The rotation direction of the docking rod 11 that enables the core barrel 23 to begin to deform is defined as forward rotation, and the rotation direction of the docking rod 11 that enables the core barrel 23 to restore its deformation is defined as reverse rotation; the core barrel 23 is in the original undeformed state as the starting state.

[0059] In the initial state, the connecting piece 27 presses against the end of the long hole 26 away from the driving mechanism 10. Restricted by the long hole 26, the adjusting rod 21 cannot move in the direction away from the driving mechanism 10, that is, the first thread structure cannot be further loosened. The docking rod 11 is rotated in the opposite direction, and the adjusting rod 21 is restricted by the long hole 26 and the connecting piece 27 and cannot rotate. At the same time, the adjusting rod 21 also restricts the circumferential rotation of the connecting sleeve 12. The docking rod 11 and the connecting sleeve 12 are loosened, and the docking rod 11 moves in the direction away from the connecting sleeve 12. The boss 111 drives the driving part 141 of the cam 14 to rotate, and the clamping part 142 of the cam 14 is recovered into the mounting shell 13. At this time, the chemical drive stepless adjustment plug can be installed in the liquid channel 31. Then the docking rod 11 is rotated forward, and the docking rod 11 moves toward the direction close to the connecting sleeve 12, the boss 111 is disengaged from the driving part 141, the clamping part 142 of the cam 14 is rotated out of the mounting shell 13, and the clamping part 142 of the cam 14 is clamped into the clamping groove 34 on the side wall of the liquid channel 31. Then the docking rod 11 is rotated forward, the docking rod 11 and the connecting sleeve 12 are completely tightened, the docking rod 11 no longer moves axially, the adjustment rod 21 and the connecting sleeve 12 begin to be tightened, the adjustment rod 21 moves toward the direction close to the connecting sleeve 12, and the adjustment rod 21 pulls the moving end 232 of the core barrel 23 toward the limiting end 231 of the core barrel 23, so that the core barrel 23 begins to produce a bulging deformation, and the flow in the liquid channel 31 can be adjusted at this time. When the connecting member 27 moves to the end of the long hole 26 facing the driving mechanism 10, the distance between the moving end 232 and the limiting end 231 is the smallest, and the deformation of the core barrel 23 reaches the maximum. After the chemical drive stepless regulating plug is used, the docking rod 11 is rotated in the opposite direction until the clamping portion 142 of the cam 14 is rotated into the mounting shell 13 , and the chemical drive stepless regulating plug can be taken out from the liquid channel 31 .

[0060] In addition, it should be noted that the chemical flooding stepless adjustment plug in the present invention is a plug that can achieve stepless adjustment and is used in the chemical flooding process.

[0061] like Figure 6 As shown, the present invention also provides an injection device, which includes the above-mentioned chemical drive stepless adjustment plug.

[0062] Specifically, the dispensing device includes a dispensing device body 30, in which a liquid channel 31 is provided, a chemical drive stepless regulating plug is installed in the liquid channel 31, and the chemical drive stepless regulating plug is clamped at a clamping groove 34 through a pair of cams 14. The flow regulating mechanism 20 of the liquid channel 31 is located between a liquid inlet 32 ​​of the liquid channel 31 and a liquid outlet 33 of the liquid channel 31. Preferably, the outside of the mounting shell 13 can also be sleeved with a second sealing ring 135, and the liquid outlet 33 is located between the second sealing ring 135 and the flow regulating mechanism 20, so as to prevent contaminants from entering the position where the cam 14 is located in the mounting shell 13.

[0063] In this embodiment, the injection device can realize continuous, smooth and controllable stepless regulation during chemical flooding injection through the chemical flooding stepless adjustment plug of the above embodiment, which will not be described in detail in this embodiment.

[0064] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the present invention to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A chemical flooding stepless regulating plug, characterized in that: It comprises a driving mechanism (10) and a flow regulating mechanism (20) connected to each other; The flow regulating mechanism (20) comprises an adjusting rod (21), an adjusting tube (22) and a core barrel (23) which are coaxially sleeved in sequence from the inside to the outside, one axial end of the core barrel (23) is a limited end (231), and the other axial end of the core barrel (23) is a movable end (232), and the movable end (232) is connected to the adjusting rod (21); The driving mechanism (10) is capable of driving the adjusting rod (21) to move in the adjusting tube (22) along the axial direction of the adjusting tube (22), thereby driving the moving end (232) to move, so that the middle part of the core tube (23) located between the moving end (232) and the limiting end (231) gradually bulges out or retracts in a direction away from the adjusting tube (22).

2. The chemical flooding stepless regulating plug according to claim 1, characterized in that: The flow regulating mechanism (20) further comprises a limiting ring (24), wherein the limiting ring (24) is fixedly sleeved outside the regulating tube (22), the limiting ring (24) is located between the core barrel (23) and the driving mechanism (10), and the limiting end (231) of the core barrel (23) abuts against a side of the limiting ring (24) facing the core barrel (23).

3. The chemical flooding stepless regulating plug according to claim 2 is characterized in that: The flow regulating mechanism (20) further comprises an adjusting ring (25), wherein the adjusting ring (25) is movably sleeved outside the adjusting tube (22), the core tube (23) is located between the adjusting ring (25) and the limiting ring (24), and the movable end (232) abuts against a side of the adjusting ring (25) facing the movable end (232); The adjusting tube (22) is provided with a pair of long holes (26) penetrating the tube wall and arranged opposite to each other, and the length direction of the long holes (26) is arranged along the axial direction of the adjusting tube (22); the adjusting rod (21) is provided with a connecting piece (27) radially penetrating the adjusting rod (21), and the two ends of the connecting piece (27) respectively pass through the two long holes (26) in a one-to-one correspondence and are respectively connected to the adjusting ring (25); When the core barrel (23) is in a natural state, one end of the long hole (26) facing the driving mechanism (10) is located between the limiting end (231) and the movable end (232), and the movable end (232) of the core barrel (23) is located between the two ends of the long hole (26) in the length direction.

4. The chemical flooding stepless regulating plug according to claim 3 is characterized in that: The adjusting ring (25), the limiting ring (24), the core barrel (23), the long hole (26) and the connecting piece (27) constitute an adjusting core structure; A plurality of the adjusting core structures are arranged at intervals along the axial direction of the adjusting tube (22).

5. The chemical flooding stepless regulating plug according to any one of claims 1 to 4, characterized in that: When the core barrel (23) is in an original state, in the radial direction of the core barrel (23), the inner side wall of the core barrel (23) is recessed toward the outer side wall of the core barrel (23); In the axial direction of the core barrel (23), the thickness gradually becomes thinner from both ends of the core barrel (23) to the middle part of the core barrel (23).

6. The chemical flooding stepless regulating plug according to claim 3 is characterized in that: The driving mechanism (10) comprises a docking rod (11) which is coaxial with the axis of the adjusting rod (21), a connecting sleeve (12) and a mounting shell (13); the mounting shell (13) is connected to the adjusting tube (22); the docking rod (11) is connected to the connecting sleeve (12); the connecting sleeve (12) is connected to the adjusting rod (21) via a first threaded structure; the mounting shell (13) is sleeved on the outside of the docking rod (11) and the connecting sleeve (12); the connecting sleeve (12) is configured to be rotatable in the circumferential direction and to be restricted in axial movement; When the docking rod (11) is rotated circumferentially, the first thread structure can cause the adjustment rod (21) to move along the axial direction of the adjustment tube (22).

7. The chemical flooding stepless regulating plug according to claim 6, characterized in that: The drive mechanism (10) is provided with a snap-fit ​​structure capable of being radially released or retracted, and the snap-fit ​​structure is used for snap-fitting with a snap-fit ​​groove in the liquid channel.

8. The chemical flooding stepless regulating plug according to claim 7, characterized in that: The upper ring of the docking rod (11) is provided with a boss (111); The connecting sleeve (12) cooperates with the docking rod (11) via a second threaded structure; when the docking rod (11) is rotated circumferentially, the second threaded structure can cause the docking rod (11) to move axially in the opposite direction to the moving direction of the adjusting rod (21); The mounting shell (13) is provided with a pair of radially opposite card interfaces (134); the mounting shell (13) is also provided with a pair of rotatable cams (14); the boss (111) is located between the cam (14) and the connecting sleeve (12); the axes of the rotating shafts of the two cams (14) are perpendicular to the axis of the docking rod (11); the cams (14) are distributed on both radial sides of the docking rod (11); the cams (14) have a driving portion (141) facing the docking rod (11) and a card connection portion (142) facing away from the docking rod (11); the card interfaces (134) correspond to the card connection portions (142) one by one; the cams (14) are connected to an elastic component so that the card connection portions (142) of the cams (14) are biased to the outside of the mounting shell (13); The boss (111), the cam (14), the card interface (134) and the elastic component form the card connection structure; when the boss (111) moves toward the cam (14), the boss (111) can drive the driving portion (141) of the cam (14) to rotate clockwise, so that the card connection portion (142) of the cam (14) is transferred into the mounting shell (13) via the corresponding card interface (134).

9. The chemical flooding stepless regulating plug according to claim 7 or 8, characterized in that: A first limiting portion is provided in the middle ring of the mounting shell (13), and a second limiting portion is provided at one end of the adjusting tube (22) facing the connecting sleeve (12). The connecting sleeve (12) is sandwiched between the first limiting portion and the second limiting portion to limit the axial movement of the connecting sleeve (12).

10. A dispensing device, characterized in that: A chemical drive stepless adjustment plugging device comprising the one described in any one of claims 1-9.

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