Packer system with well wall cleaning and scraping function

Abstract

The invention discloses a packer system with a well wall cleaning and scraping function, and belongs to the technical field of petroleum well packing, the packer system comprises a packing assembly, a cleaning and scraping assembly, a driving assembly and a retracting and releasing assembly, the driving assembly comprises a first gear rotationally arranged on the outer wall of a sliding sleeve, and a second gear rotationally arranged on the outer wall of the sliding sleeve; the cleaning and scraping assembly comprises a second gear rotationally arranged on the outer wall of the sliding sleeve. The cleaning and scraping assembly is arranged at one end of the packer, and then the driving assembly drives the cleaning and scraping assembly to work, so that obstacles in a well wall can be cleaned and scraped, the fitting degree of the packer and the well wall during setting is improved, and the setting effect of the packer is improved; the cleaning and scraping assembly can be driven by the retracting and releasing assembly to do linear motion, so that connection between the cleaning and scraping assembly and the packer is split and assembled, the load of the packer is reduced when the well wall does not need to be cleaned and scraped, meanwhile, the cleaning and scraping assembly is assembled when the well wall needs to be cleaned and scraped, the convenience of the cleaning and scraping assembly is improved, and then the setting efficiency of the packer is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum well isolation, and in particular relates to a packer system with a well wall cleaning function. Background Art

[0002] In the oil extraction industry, the cleanliness of the well wall has a vital impact on the normal operation of the oil well and the oil production efficiency. Over time, the well wall will often form various scales due to fluid deposition, mineral precipitation, chemical reaction deposition, etc. These scales will not only reduce the output of the oil well, but also increase the wear of the equipment and shorten the service life of the oil well.

[0003] Traditional methods of cleaning oil well walls are mostly to stop the well regularly for manual cleaning, which not only requires a lot of manpower and material resources, but is also inefficient and causes great interference to the normal production of the oil well. In addition, as the mining depth increases, the underground environment becomes more and more complex, and traditional manual cleaning methods are increasingly unable to meet actual needs. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a packer system with a well wall cleaning function to solve the above problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a packer system with a wellbore scraping function, comprising a packer assembly, wherein the packer assembly comprises a sliding sleeve; the packer system with a wellbore scraping function also comprises: A scraping assembly, the scraping assembly is arranged at one end of the sliding sleeve and is used to scrape obstacles on the well wall when the sliding sleeve is lowered into the well; A driving assembly, the driving assembly being arranged at one side of the scraping assembly and used for driving the scraping assembly to perform scraping work; the driving assembly and the scraping assembly are detachably connected; A retractable assembly, one end of which is slidably disposed in the driving assembly and is used to disassemble and assemble the connection between the driving assembly and the scraping assembly; The drive assembly comprises: A first gear, the first gear is rotatably disposed on the outer wall of the sliding sleeve; the first gear is a detachable structure; The scraping assembly comprises: A cleaning scraper blade is rotatably arranged on the outer wall of the sliding sleeve, and a tooth groove meshing with the first gear is provided on the inner side of the cleaning scraper blade.

[0006] On the basis of the above technical solution, the present invention also provides the following optional technical solution: Further technical solution: The scraping assembly also includes: A cleaning scraper blade is fixedly arranged on one side of the recyclable cleaning scraper shell.

[0007] Further technical solution: The drive assembly also includes: A second gear, the second gear is rotatably disposed on one side of the sliding sleeve, and the second gear is meshed and connected with the first gear through a groove provided on the first gear; A rotating shaft is rotatably disposed on the sliding sleeve, and the rotating shaft is penetrated and fixedly connected with the second gear to provide support for the second gear.

[0008] Further technical solution: The drive assembly also includes: A connecting rod, wherein the connecting rod is arranged at one side of the second gear, and one end of the connecting rod is connected to the second gear via a fixing block fixedly arranged on the second gear, and the fixing block fixedly arranged on the second gear is rotatably connected to the connecting rod; A hydraulic telescopic component is arranged on one side of the connecting rod, the hydraulic telescopic component is fixedly connected to the sliding sleeve, and the hydraulic telescopic component is rotatably connected to one end of the connecting rod through a connecting component fixedly arranged on the extended end of the hydraulic telescopic component.

[0009] Further technical solution: The retractable assembly specifically includes: a slider, the slider being slidably disposed on the second gear; The retracting rod is fixedly arranged on one side of the sliding block and is used to drive the second gear to perform linear movement in the vertical direction through the sliding block.

[0010] Further technical solution: The sealing assembly specifically includes: A sealing rubber sleeve, wherein the sealing rubber sleeve is arranged on the outer wall of the sliding sleeve, one end of the sealing rubber sleeve is in contact connection with the sliding sleeve, and the inner side of the sealing rubber sleeve is in sliding connection with the outer wall of the sliding sleeve; An extrusion piece, wherein the extrusion piece is slidably disposed on the outer wall of the sliding sleeve, and one end of the extrusion piece is in contact with one end of the sealing rubber sleeve and is used to extrude the sealing rubber sleeve; A slip, wherein the slip is fixedly arranged on one side of the extrusion member; A slip regulator is arranged on one side of the slip, one end of the slip regulator is abuttingly connected to the slip; the slip regulator is fixedly connected to the sliding sleeve.

[0011] Further technical solution: The first gear includes: A detachable plate, which is arranged on one side of the first gear and is in abutting connection with the first gear, and is used to disassemble and assemble the first gear through bolts threaded on the first gear; the bolts are used to apply pressure to the detachable plate to maintain the intrusive connection between the detachable plate and the first gear.

[0012] The present invention provides a packer system with a well wall cleaning function, which has the following beneficial effects compared with the prior art: 1. By setting a scraping assembly at one end of the packer, and then driving the scraping assembly to work through the driving assembly, obstacles in the well wall can be scraped, and the fit between the packer and the well wall can be improved during setting, thereby improving the setting effect of the packer.

[0013] 2. The scraper assembly is driven to perform linear motion by the retracting and extending assembly, so as to disassemble and assemble the connection between the scraper assembly and the packer. This reduces the weight of the packer when the wellbore wall does not need to be scraped, and assembles it when the wellbore wall needs to be scraped, thereby improving the convenience of the scraper assembly and thus improving the setting efficiency of the packer.

[0014] 3. The modular design of the scraping and driving components allows each component of the system to be replaced or upgraded individually, reducing maintenance costs while improving the scalability and flexibility of the system.

[0015] 4. The underground working environment is complex and dangerous. The quick disassembly and assembly design of the scraping assembly through the retractable assembly reduces the operating difficulty and risk of underground workers and improves the safety of operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A side view of the three-dimensional structural cross-section of a packer system with a well wall cleaning function provided by the present invention.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 A top-down three-dimensional structural cross-sectional view of a packer system with a well wall cleaning function provided by the present invention.

[0019] Figure 4 A schematic structural diagram of the drive assembly provided by the present invention.

[0020] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0021] Figure 6 A schematic diagram of the three-dimensional structure of the driving assembly and the connecting assembly provided by the present invention.

[0022] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0023] Figure 8 for Figure 6 Enlarged view of point D in the middle.

[0024] Notes on figure numbers: 1. Sealing assembly; 2. Scraping assembly; 3. Driving assembly; 4. Retractable assembly; 101. Sliding sleeve; 102. Extrusion piece; 103. Sealing rubber sleeve; 104. Slip; 105. Slip adjustment block; 201. Scraping blade; 202. Recyclable scraping shell; 301. First gear; 302. Second gear; 303. Connecting rod; 304. Hydraulic telescopic member; 305. Rotating shaft; 306. Connecting piece; 307. Removable plate; 308. Bolt; 401. Sliding block; 402. Retractable rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, a packer system with a wellbore scraping function provided by an embodiment of the present invention includes a packer assembly 1, wherein the packer assembly 1 includes a sleeve 101; the packer system with a wellbore scraping function also includes: A scraping assembly 2, which is arranged at one end of the sliding sleeve 101 and is used to scrape obstacles on the well wall when the sliding sleeve 101 is lowered into the well; A driving component 3, which is arranged on one side of the scraping component 2 and is used to drive the scraping component 2 to perform scraping work; the driving component 3 and the scraping component 2 are detachably connected; A retractable assembly 4, one end of which is slidably disposed in the driving assembly 3, and is used to disassemble and assemble the connection between the driving assembly 3 and the scraping assembly 2; The driving assembly 3 comprises: A first gear 301, which is rotatably disposed on the outer wall of the sliding sleeve 101; the first gear 301 is a detachable structure; The scraping assembly 2 comprises: A cleaning blade 201, wherein the cleaning blade 201 is rotatably disposed on the outer wall of the sliding sleeve 101, and a tooth groove meshing with the first gear 301 is provided on the inner side of the cleaning blade 201; Specifically, by starting the driving assembly 3, the first gear 301 in the driving assembly 3 drives the cleaning blade 201 in the cleaning assembly 2 to rotate, thereby driving the cleaning assembly 2 to work and clean the obstacles in the well wall; In this embodiment, the first gear 301 can be driven to perform linear movement in the vertical direction through the retracting and releasing component 4, so that the first gear 301 is disconnected from the cleaning blade 201, thereby completing the separation between the cleaning component 2 and the driving component 3. After the cleaning component 2 completes the cleaning of obstacles in the well wall, it can be recovered, thereby realizing the reuse of the cleaning component 2, improving the utilization rate of the cleaning component 2, and also reducing the weight of the packing component 1 during underground operation, reducing the risk of error of the packing component 1 during the setting process; It should be explained that when the packing assembly 1 is working underground, if the well wall does not need to be scraped, by separating the scraping assembly 2 from the driving assembly 3, the weight of the packing assembly 1 can be reduced, so that the packing assembly 1 will not slide or even fall due to excessive weight after the packing assembly 1 is set, thereby reducing the risk of error of the packing assembly 1 during the setting process; In addition, when the isolation assembly 1 is performing underground operations, if there are obstacles in the well wall that need to be scraped, the scraping assembly 2 can be lowered into the well through the retracting assembly 4, so that the scraping blade 201 and the first gear 301 are restored to meshing connection, and then the driving assembly 3 is started to allow the scraping assembly 2 to complete the scraping of the obstacles in the well wall, thereby improving the convenience of the isolation assembly 1 during underground operations.

[0028] like Figure 1 As shown, as a preferred embodiment of the present invention, the scraping assembly 2 further includes: The cleaning blade 201 is fixedly arranged on one side of the recyclable cleaning shell 202.

[0029] like Figure 4 and Figure 5 As shown, as a preferred embodiment of the present invention, the driving component 3 also includes: A second gear 302, which is rotatably disposed on one side of the sliding sleeve 101, and the second gear 302 is meshed and connected with the first gear 301 through a groove provided on the first gear 301; A rotating shaft 305, wherein the rotating shaft 305 is rotatably disposed on the sliding sleeve 101, and the rotating shaft 305 is penetrated and fixedly connected with the second gear 302, so as to provide support for the second gear 302; Specifically, by rotating the second gear 302, the second gear 302 drives the first gear 301 to rotate, thereby driving the cleaning blade 201 to rotate, so that the cleaning assembly 2 works to clean the obstacles in the well wall.

[0030] like Figure 4 and Figure 5 As shown, as a preferred embodiment of the present invention, the driving component 3 also includes: A connecting rod 303, wherein the connecting rod 303 is disposed on one side of the second gear 302, and one end of the connecting rod 303 is connected to the second gear 302 via a fixing block fixedly disposed on the second gear 302, and the fixing block fixedly disposed on the second gear 302 is rotatably connected to the connecting rod 303; The hydraulic telescopic member 304 is arranged on one side of the connecting rod 303, the hydraulic telescopic member 304 is fixedly connected to the sliding sleeve 101, and the hydraulic telescopic member 304 is rotatably connected to one end of the connecting rod 303 through a connecting member 306 fixedly arranged on the extended end of the hydraulic telescopic member 304.

[0031] Specifically, by starting the hydraulic telescopic member 304, the extended end of the hydraulic telescopic member 304 drives one end of the connecting rod 303 to perform linear motion through the connecting member 306. Since the other end of the connecting rod 303 is connected to the second gear 302 through the rotating shaft 305, the other end of the connecting rod 303 performs circular motion, thereby driving the second gear 302 to rotate, and finally the scraping component 2 scrapes the obstacles in the well wall.

[0032] like Figure 5 and Figure 6 As shown, as a preferred embodiment of the present invention, the retractable assembly 4 specifically includes: A slider 401, wherein the slider 401 is slidably disposed on the second gear 302; A retracting rod 402, wherein the retracting rod 402 is fixedly disposed on one side of the slider 401, and is used to drive the second gear 302 to perform linear motion in a vertical direction through the slider 401; Specifically, by pulling the retracting rod 402 in the vertical direction, the retracting rod 402 drives the slider 401 to perform linear motion, and the slider 401 drives the cleaning blade 201 to perform linear motion in the vertical direction, so that the cleaning assembly 2 and the driving assembly 3 can be disassembled and assembled, thereby improving the convenience of the packing assembly 1; It should be explained that when the packing assembly 1 has entered the well, if it is found that the well wall needs to be scraped, the retractable scraping shell 202 in the scraping assembly 2 can be restored to mesh with the first gear 301 in the driving assembly 3 through the retractable assembly 4, so as to complete the scraping of obstacles in the well wall, thereby improving the convenience of the packing assembly 1. In addition, the method of pulling the retractable rod 402 includes but is not limited to a rope, a motor drive, etc.

[0033] like Figure 1 As shown, as a preferred embodiment of the present invention, the sealing assembly 1 specifically includes: A sealing rubber sleeve 103, wherein the sealing rubber sleeve 103 is disposed on the outer wall of the sliding sleeve 101, and one end of the sealing rubber sleeve 103 is in contact connection with the sliding sleeve 101, and the inner side of the sealing rubber sleeve 103 is in sliding connection with the outer wall of the sliding sleeve 101; Two groups of extrusion members 102, the two groups of extrusion members 102 are slidably disposed on the outer wall of the sliding sleeve 101, and one end of the two groups of extrusion members 102 is respectively abutted and connected with one end of the sealing rubber sleeve 103, so as to extrude the sealing rubber sleeve 103; A slip 104, wherein the slip 104 is fixedly disposed on one side of the extrusion member 102; A slip regulator 105, wherein the slip regulator 105 is disposed on one side of the slip 104, and one end of the slip regulator 105 is in contact with the slip 104; the slip regulator 105 is fixedly connected to the sleeve 101; Specifically, pressure is applied to the extrusion piece 102 so that the extrusion piece 102 performs linear movement. At this time, the sealing rubber sleeve 103 is made of rubber and will deform when subjected to pressure. Since the inner side of the sealing rubber sleeve 103 is in contact with the sleeve 101, the sealing rubber sleeve 103 is in contact with the well wall, thereby completing the isolation of the working well. At the same time, when the extrusion piece 102 performs linear movement, it will drive the cava 104 to perform linear movement. At this time, the contact point between the cava 104 and the cava adjuster 105 is displaced, thereby changing the linear movement angle of one end of the cava 104, until one end of the cava 104 is in contact with the well wall, and the cava 104 stops linear movement, thereby reinforcing the stability of the sleeve 101 and preventing the sleeve 101 from moving up and down.

[0034] In addition, the method of applying pressure to the extrusion member 102 is to make the extrusion member 102 perform linear motion. The methods of making the extrusion member 102 perform linear motion include but are not limited to motor drive, gravity drive, etc.

[0035] like Figure 6 As shown, as a preferred embodiment of the present invention, the first gear 301 includes: A detachable plate 307 is provided on one side of the first gear 301 and is in contact connection with the first gear 301, and is used to disassemble and assemble the first gear 301 through a bolt 308 threadedly connected to the first gear 301; the bolt 308 is used to apply pressure to the detachable plate 307 to maintain the contact connection between the detachable plate 307 and the first gear 301; Specifically, by disconnecting the threaded connection between the bolt 308 and the first gear 301, the first gear 301 can be disassembled, and vice versa for assembly, which can achieve the rapid disassembly and assembly of the drive assembly 3, thereby reducing the load of the packer assembly 1 when scraping is not required, preventing the packer assembly 1 from failing to set due to excessive load, and optimizing the setting efficiency of the packer assembly 1 during setting; It should be explained that the first gear 301 is fixed after being split into two and then reassembled, and is fixed by the detachable plate 307 and the bolt 308. Removing the bolt 308 can restore the first gear 301 to the disassembled state; in addition, the reason for setting it in a split state is that both sides of the first gear 301 are in a state of close contact with the sliding sleeve 101 (to ensure the stability of the first gear 301 during rotation and prevent the meshing connection between the second gear 302 and the first gear 301 from being unstable, resulting in the inability to achieve the power transmission effect), and the first gear 301 cannot be directly disassembled from the sliding sleeve 101.

[0036] The present invention can not only set a scraping assembly 2 at one end of the packer assembly 1, and then drive the scraping assembly 2 to work through the drive assembly 3, thereby scraping the obstacles in the wellbore, improving the fitting degree of the packer assembly 1 with the wellbore during setting, and thus improving the setting effect of the packer assembly 1, but also drive the scraping assembly 2 to perform a linear motion through the retracting and extending assembly 4, thereby disassembling and assembling the connection between the scraping assembly 2 and the packer assembly 1, reducing the load of the packer assembly 1 when the wellbore does not need to be scraped, and at the same time assembling when the wellbore needs to be scraped, improving the convenience of the scraping assembly 2, and thus improving the setting efficiency of the packer assembly 1; At the same time, the modular design of the scraping assembly 2 and the drive assembly 3 enables each component of the system to be replaced or upgraded individually, reducing the maintenance cost, and at the same time improving the scalability and flexibility of the system In addition, the downhole operation environment is complex and dangerous. The quick disassembly and assembly design of the scraping assembly 2 by the retracting and extending assembly 4 reduces the operation difficulty and risk of downhole workers and improves the operation safety.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A packer system with a wellbore scraping function, comprising a packer assembly (1), characterized in that: The packer assembly (1) comprises a sliding sleeve (101); the packer system with a wellbore scraping function further comprises: A scraping assembly (2), the scraping assembly (2) being arranged at one end of the sliding sleeve (101) and being used for scraping obstacles on the well wall when the sliding sleeve (101) is lowered into the well; a driving component (3), the driving component (3) being arranged on one side of the scraping component (2) and being used to drive the scraping component (2) to perform a scraping operation; the driving component (3) and the scraping component (2) being detachably connected; a retractable assembly (4), one end of which is slidably disposed in the driving assembly (3) and is used to disassemble and assemble the connection between the driving assembly (3) and the scraping assembly (2); The driving component (3) comprises: a first gear (301), the first gear (301) being rotatably disposed on the outer wall of the sliding sleeve (101); the first gear (301) is a detachable structure; The scraping assembly (2) comprises: A cleaning scraper (201) is rotatably arranged on the outer wall of the sliding sleeve (101), and a tooth groove is provided on the inner side of the cleaning scraper (201) and meshes with the first gear (301).

2. A packer system with well wall cleaning function according to claim 1, characterized in that: The scraping assembly (2) further comprises: A cleaning scraper blade (201), wherein the cleaning scraper blade (201) is fixedly arranged on one side of the recyclable cleaning scraper shell (202).

3. The packer system with well wall cleaning function according to claim 1, characterized in that: The driving component (3) further comprises: a second gear (302), the second gear (302) being rotatably disposed on one side of the sliding sleeve (101), the second gear (302) being meshedly connected with the first gear (301) via a groove provided on the first gear (301); A rotating shaft (305), the rotating shaft (305) is rotatably disposed on the sliding sleeve (101), and the rotating shaft (305) is penetrated and fixedly connected with the second gear (302), so as to provide support for the second gear (302).

4. A packer system with well wall cleaning function according to claim 3, characterized in that: The driving component (3) further comprises: a connecting rod (303), the connecting rod (303) being arranged on one side of the second gear (302), and one end of the connecting rod (303) being connected to the second gear (302) via a fixing block fixedly arranged on the second gear (302), and the fixing block fixedly arranged on the second gear (302) being rotationally connected to the connecting rod (303); A hydraulic telescopic component (304), the hydraulic telescopic component (304) being arranged on one side of the connecting rod (303), the hydraulic telescopic component (304) being fixedly connected to the sliding sleeve (101), and the hydraulic telescopic component (304) being rotatably connected to one end of the connecting rod (303) via a connecting component (306) fixedly arranged on the protruding end of the hydraulic telescopic component (304).

5. The packer system with well wall cleaning function according to claim 3, characterized in that: The retractable assembly (4) specifically comprises: A slider (401), the slider (401) being slidably disposed on the second gear (302); A retractable rod (402), the retractable rod (402) being fixedly arranged on one side of the slider (401), and being used to drive the second gear (302) to perform linear movement in a vertical direction via the slider (401).

6. The packer system with well wall cleaning function according to claim 1, characterized in that: The sealing component (1) specifically comprises: A sealing rubber sleeve (103), wherein the sealing rubber sleeve (103) is arranged on the outer wall of the sliding sleeve (101), and one end of the sealing rubber sleeve (103) is in contact connection with the sliding sleeve (101), and the inner side of the sealing rubber sleeve (103) is in sliding connection with the outer wall of the sliding sleeve (101); An extrusion piece (102), the extrusion piece (102) being slidably disposed on the outer wall of the sliding sleeve (101), and one end of the extrusion piece (102) being abuttingly connected to one end of the sealing rubber sleeve (103) for extruding the sealing rubber sleeve (103); A slip (104), the slip (104) being fixedly arranged on one side of the extrusion member (102); A slip regulator (105), the slip regulator (105) being arranged on one side of the slip (104), one end of the slip regulator (105) being in contact connection with the slip (104); the slip regulator (105) being fixedly connected to the sliding sleeve (101).

7. The packer system with well wall cleaning function according to claim 1, characterized in that: The first gear (301) comprises: A detachable plate (307), the detachable plate (307) being arranged on one side of the first gear (301) and being in abutting connection with the first gear (301), and being used for disassembling and assembling the first gear (301) by means of a bolt (308) threadedly connected to the first gear (301); the bolt (308) being used for applying pressure to the detachable plate (307) to maintain the intrusive connection between the detachable plate (307) and the first gear (301).

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