Integrated high-pressure cement plug flushing and injecting tool
By designing an integrated high-pressure flushing and cementing plug tool and utilizing the combination of a seating ball and shear pins, the annulus outside the casing is efficiently sealed, solving the problems of annular pressure outside the casing and shallow gas accumulation in abandoned wells, and ensuring permanent closure of the wellbore and environmental protection.
Patent Information
- Application Number
- CN202422881326.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-25
AI Technical Summary
During the production process of abandoned wells, problems such as annular pressure outside the casing and shallow gas accumulation are prone to occur, which leads to the migration of oil and gas outside the casing and causes environmental pollution. Existing tools are difficult to effectively seal the annular space outside the casing.
An integrated high-pressure flushing and cementing plug tool has been designed, which includes a tool body, a leather cup packer, a cementing sleeve, a cleaning tool and a ball seat. Through the cooperation of the sealing ball and the shear pin, the conversion between high-pressure jet cleaning of the annulus and cementing functions is realized, forming a sealing system to ensure the sealing effect.
It achieves efficient sealing of the annulus outside the casing, avoids oil and gas from rising, ensures permanent sealing of the wellbore and protection of groundwater, and simplifies the operating procedures.
Smart Images
Figure CN223330528U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of abandoned wells, in particular to an integrated high-pressure flushing and cementing plugging tool. Background Art
[0002] A complete oil and gas field development cycle typically includes four stages: exploration, drilling and completion, development, and abandonment. Abandoned wells generally require the placement of mechanical tools or the injection of cement plugs within the wellbore to permanently seal key formations, isolate the reservoir and other fluid-bearing strata, and prevent the formation of interconnected pathways for fluid migration within the wellbore, while also protecting underground drinking water from contamination. However, abandoned oil and gas wells often experience problems such as annular pressure outside the casing and shallow gas accumulation during production. If improperly handled, oil and gas can migrate upward along the outside of the casing, causing environmental pollution accidents.
[0003] The integrated perforation, cleaning, and cementing process is an effective tool for sealing the annulus outside the casing, which can be affected by substandard cementing quality and shallow gas formations. It enables casing perforation, bridge plugging, cleaning the perforations, and cementing in a single drilling run, creating a complete, layer-to-layer closed system within the wellbore. High-pressure cleaning and cementing tools are key to this technology, making further research on these tools essential. Utility Model Content
[0004] In view of the deficiencies of the prior art, the utility model proposes an integrated high-pressure flushing and cementing plug tool that can simultaneously realize the functions of high-pressure jet cleaning of the annulus and cementing.
[0005] According to the utility model, the integrated high-pressure flushing and cementing plug tool includes: a tool body, the tool body includes an upper joint, an upper connector, a cementing sleeve body, a short connector, a cleaning tool body, a lower connector and a lower joint which are coaxially connected in sequence, and an axially through fluid channel is formed inside the tool body; a first leather cup packer sleeved on the outer periphery of the upper connector and a second leather cup packer sleeved on the outer periphery of the lower connector; a cementing plug tool, the cementing plug tool includes a cementing ball seat fixed in the cementing sleeve body, and a first sealing ball, a hole is formed on the outer peripheral wall of the cementing sleeve body, and the cementing ball seat blocks the hole in the initial state; and a cleaning tool, the cleaning tool includes a cleaning tool ball seat fixed in the cleaning tool body, and a second sealing ball, a nozzle is formed on the outer peripheral wall of the cleaning tool body, and the cleaning tool ball seat blocks the nozzle in the initial state. Among them, the integrated high-pressure flushing and cementing plug tool is constructed with a high-pressure jet cleaning annulus mode: the second sealing ball enters the fluid channel and, under the action of external pressure, pushes the cleaning tool ball seat downward relative to the cleaning tool body to connect the fluid channel with the nozzle; and a cementing mode: the first sealing ball enters the fluid channel and, under the action of external pressure, pushes the cementing ball seat downward relative to the cementing sleeve body to connect the fluid channel with the hole.
[0006] Furthermore, the first leather cup packer includes a first leather cup packer body mounted on the outer periphery of the upper connector, two groups of first leather cups mounted in sequence on the first leather cup packer body, and a first spacer ring located between the two groups of first leather cups; the second leather cup packer includes a second leather cup packer body mounted on the outer periphery of the lower connector, two groups of second leather cups mounted in sequence on the second leather cup packer body, and a second spacer ring located between the two groups of second leather cups.
[0007] Furthermore, copper rings are respectively provided between the upper joint and the end face of the first leather cup packer body, between the first leather cup packer body and the end face of the cementing sleeve body, between the second leather cup packer body and the end face of the cleaning tool body, and between the second leather cup packer body and the lower joint.
[0008] Furthermore, the cementing plug tool also includes a primary shear pin and a secondary shear pin. The cementing ball seat is fixed to the cementing sleeve body by the primary shear pin, and the secondary shear pin is used to limit the cementing ball seat. In the cementing mode, the first sealing ball enters the fluid channel and pushes the cementing ball seat to shear the primary shear pin under the action of external pressure, so that the cementing ball seat descends relative to the cementing sleeve body to the secondary shear pin and stops moving, thereby connecting the fluid channel with the hole to achieve flushing. After the flushing is completed, the secondary shear pin continues to be sheared to allow the cleaning tool ball seat and the second sealing ball to escape from the fluid channel.
[0009] Furthermore, the cementing ball seat includes a cementing ball seat body and a first annular groove formed on the outer circumference of the cementing ball seat body. In the initial state, the secondary shear pin abuts against the end of the first annular groove close to the lower joint, and the primary shear pin is fixedly connected to the outside of the first annular groove; after the primary shear pin is sheared off, the cementing ball seat moves downward, causing the secondary shear pin to slide upward relative to the cementing ball seat in the first annular groove until the secondary shear pin abuts against the end of the first annular groove close to the upper joint and stops moving.
[0010] Furthermore, the cleaning tool also includes a primary shear pin and a secondary shear pin. The cleaning tool ball seat is fixed to the cleaning tool body by the primary shear pin, and the secondary shear pin is used to limit the cleaning tool ball seat. In the high-pressure jet cleaning annulus mode, the second sealing ball enters the fluid channel and pushes the cleaning tool ball seat to cut the primary shear pin under the action of external pressure, so that the cleaning tool ball seat descends relative to the cleaning tool body to the secondary shear pin and stops moving, thereby connecting the fluid channel with the nozzle to achieve flushing. After flushing is completed, the secondary shear pin continues to be sheared, so that the cleaning tool ball seat and the second sealing ball are out of the fluid channel.
[0011] Furthermore, the cleaning tool ball seat includes a cleaning tool ball seat body and a second annular groove formed on the outer circumference of the cleaning tool ball seat body. In the initial state, the secondary shear pin abuts against one end of the second annular groove close to the lower joint, and the primary shear pin is fixedly connected to the outside of the second annular groove; after the primary shear pin is sheared off, the cleaning tool ball seat moves downward so that the secondary shear pin slides upward relative to the cleaning tool ball seat in the second annular groove until the secondary shear pin abuts against one end of the second annular groove close to the upper joint and stops moving.
[0012] Furthermore, a first well-washing hole is formed in the area of the first leather cup packer body between the upper joint and the adjacent first leather cup, a first channel connected to the first well-washing hole is formed between the first leather cup packer body and the upper connector, a second channel and a third channel are formed inside the outer walls of the cementing sleeve body and the cleaning tool body, respectively, a second well-washing hole is formed in the area of the second leather cup packer body between the lower joint and the adjacent second leather cup, and a fourth channel connected to the second well-washing hole is formed between the second leather cup packer body and the lower connector. The integrated high-pressure flushing and cementing plug tool also includes a well washing mode after cementing is completed: the first channel, the second channel, the third channel and the fourth channel are connected, and the well washing fluid enters the first channel, the second channel, the third channel and the fourth channel in sequence through the annulus between the casing and the integrated high-pressure flushing and cementing plug tool, and is then discharged from bottom to top through the fluid channel, or the well washing fluid enters through the fluid channel and passes through the fourth channel, the third channel, the second channel and the first channel in sequence, and is then discharged from the annulus between the casing and the integrated high-pressure flushing and cementing plug tool.
[0013] Furthermore, the upper joint, the upper connector, the cementing sleeve body, the short connector, the cleaning tool body, the lower connector and the lower joint are coaxially threadedly connected in sequence.
[0014] Furthermore, a sealing spacer ring is provided between the opposite ends of the cementing sleeve body and the cleaning tool body.
[0015] This integrated high-pressure flushing and cementing plugging tool is particularly suitable for oil and gas well abandonment operations. It is used to flush the annulus of poorly bonded casing perforations, and then permanently seal the annulus by injecting a cement plug into the wellbore in a single pass. This technology solves the problem of high-pressure fluid upward flow in the annulus outside the casing during well abandonment operations due to poor cementing quality. This tool lays the foundation for the realization of efficient plugging technology that performs perforation, annulus flushing, and cementing in a single pass. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Schematic diagram of the cross-sectional structure of an integrated high-pressure flushing and cementing plug tool according to an embodiment of the present utility model;
[0017] Figure 2 for Figure 1 The structural diagram of the cementing ball seat shown;
[0018] Figure 3 for Figure 1 A schematic structural diagram of a cleaning tool ball seat is shown;
[0019] Figure 4 for Figure 1 The structural diagram of the cementing sleeve body is shown;
[0020] Figure 5 for Figure 1 The structural diagram of the cleaning tool body shown;
[0021] Figure 6 for Figure 1 The structural diagram of the first leather cup packer body is shown;
[0022] Figure 7 Schematic diagram of the flow of liquid in the integrated high-pressure flushing and cementing plug tool during reverse circulation well flushing;
[0023] Figure 8 This is a schematic diagram of the operation of the integrated high-pressure flushing and cementing plug tool in the high-pressure jet cleaning annulus mode according to an embodiment of the present utility model;
[0024] Figure 9 Schematic diagram of the operation of the integrated high-pressure flushing and cementing plug tool in cementing mode according to an embodiment of the present invention. DETAILED DESCRIPTION
[0025] In order to better understand the purpose, structure and function of the present invention, the present invention is described in further detail below with reference to the accompanying drawings.
[0026] Figure 1 FIG. 1 shows the structure of an integrated high-pressure flushing and cementing plugging tool 100 according to an embodiment of the present invention. Figure 1As shown, the integrated high-pressure flushing and cementing plug tool 100 may include a tool body, which includes an upper joint 1, an upper connector 5, a cementing sleeve body 7, a short connector 11, a cleaning tool body 14, a lower connector 18 and a lower joint 19 that are coaxially connected in sequence (preferably coaxially threaded), and an axially through-flow fluid passage 26 is formed inside the tool body; a first leather cup packer 30 is sleeved on the outer periphery of the upper connector 5 and a second leather cup packer 4 is sleeved on the outer periphery of the lower connector 18. 0; a cementing plug tool, comprising a cementing ball seat 6 fixed within a cementing sleeve body 7, and a first sealing ball 8. The outer peripheral wall of the cementing sleeve body 7 is formed with a hole 25, and the cementing ball seat 6 initially blocks the hole 25; and a cleaning tool, comprising a cleaning tool ball seat 16 fixed within a cleaning tool body 14, and a second sealing ball 13. The outer peripheral wall of the cleaning tool body 14 is formed with a nozzle 15, and the cleaning tool ball seat 16 initially blocks the nozzle 15. The integrated high-pressure flushing and cementing plug tool is constructed to have a high-pressure jetting annulus cleaning mode: the second sealing ball 13 enters the fluid passage 26 and, under the action of external pressure, pushes the cleaning tool ball seat 16 downward relative to the cleaning tool body 14 to connect the fluid passage 26 with the nozzle; and a cementing mode: the first sealing ball 8 enters the fluid passage and, under the action of external pressure, pushes the cementing ball seat 6 downward relative to the cementing sleeve body 7 to connect the fluid passage 26 with the hole 25.
[0027] The tool body of the integrated high-pressure flushing and cementing plug tool 100 of the present invention is provided with a first leather cup packer 30 and a second leather cup packer 40 on the upper and lower sides respectively. The first leather cup packer 30 and the second leather cup packer 40 are used to simultaneously engage with the casing 101 (such as Figure 2 and Figure 3 A seal is formed (as shown), thereby forming a perfect "closed" system. The cementing plug tool and cleaning tool are both located between the first leather cup packer 30 and the second leather cup packer 40. This closed system forms a unique channel for high-pressure cleaning fluid or cement slurry to enter the perforated annulus of the casing 101 through the nozzle 15 or the hole 25. The integrated high-pressure flushing and cementing plug tool 100 of the present embodiment adopts an ingenious structural design and realizes internal function control of the tool through a ball-dropping or pressure-injection mechanism, realizing the switching between high-pressure jet cleaning of the annulus and cementing functions, which is simple to operate and simplifies the operation procedure.
[0028] In such Figure 1In the preferred embodiment shown, the first cup packer 30 may include a first cup packer body 2 sleeved on the outer circumference of the upper connector 5, two sets of first cups 3 sequentially sleeved on the first cup packer body 2, and a first spacer ring 4 located between the two sets of first cups 3. The second cup packer 40 includes a second cup packer body 20 sleeved on the outer circumference of the lower connector 18, two sets of second cups 21 sequentially sleeved on the second cup packer body 20, and a second spacer ring 22 located between the two sets of second cups 21. In this embodiment, the first spacer ring 4 is used to separate the two sets of first cups 3, and the second spacer ring 22 is used to separate the two sets of second cups 21. When the tool body rotates, the first cup packer 30 and the second cup packer 40 do not rotate therewith, thereby preventing wear between the first cup 3 and the second cup 21 and the casing 101, thereby increasing the service life of the tool.
[0029] Further, combined with Figures 4 to 7 As shown, the first leather cup packer body 2 is provided with a first well washing hole 31 (as shown in FIG. Figure 6 and Figure 7 As shown), a first channel 32 (as shown) communicating with the first well washing hole 31 is formed between the first leather cup packer body 2 and the upper connector 5. Figure 7 As shown), the outer walls of the cementing sleeve body 7 and the cleaning tool body 14 are respectively formed with a second channel 71 (as shown Figure 4 As shown) and the third channel 141 (as Figure 5 As shown), the second cup packer body 20 is provided with a second well washing hole 41 (as shown) in the area between the lower connector 19 and the adjacent second cup 21. Figure 7 As shown), a fourth channel 42 connected to the second well washing hole 41 is formed between the second leather cup packer body 20 and the lower connector 18. The integrated high-pressure flushing and cementing plug tool 100 may also include a well washing mode after cementing is completed: the first channel 32, the second channel 71, the third channel 141 and the fourth channel 42 are connected, and the well washing fluid enters the first channel 32, the second channel 71, the third channel 141, the fourth channel 42 and the second well washing hole 41 through the first well washing hole 31 in sequence through the annulus between the casing and the integrated high-pressure flushing and cementing plug tool, and is then discharged from bottom to top through the fluid channel 26, i.e., reverse circulation well washing; or the well washing fluid enters through the fluid channel 26 and passes through the second well washing hole 41, the fourth channel 42, the third channel 141, the second channel 71, the first channel 32 and the first well washing hole 31 in sequence, and is then discharged from the annulus between the casing and the integrated high-pressure flushing and cementing plug tool 100, i.e., positive circulation well washing.
[0030] Preferably, if Figure 1As shown, copper rings 17 may be provided between the upper joint 1 and the end face of the first leather cup packer body 2, between the first leather cup packer body 2 and the end face of the cementing sleeve body 7, between the second leather cup packer body 20 and the end face of the cleaning tool body 14, and between the second leather cup packer body 20 and the lower joint 19. The copper rings 17 are used to prevent wear between the contacting end faces when the tool body rotates.
[0031] In such Figure 1 and Figure 2 In the preferred embodiment shown, the cementing plug tool may also include a primary shear pin 9 and a secondary shear pin 10. The cementing ball seat 6 is fixed to the cementing sleeve body 7 by the primary shear pin 9, and the secondary shear pin 10 is used to limit the cementing ball seat 6. In the cementing mode, the first sealing ball 8 enters the fluid channel and pushes the cementing ball seat 6 to shear the primary shear pin 9 under the action of external pressure, so that the cementing ball seat 6 moves downward relative to the cementing sleeve body 7 to the secondary shear pin 10 and stops moving, thereby connecting the fluid channel 26 with the hole 25 to realize cementing. After the cementing is completed, the secondary shear pin 10 continues to be sheared to allow the cementing ball seat 6 and the first sealing ball 8 to escape from the fluid channel.
[0032] Specifically, combined Figure 1 and Figure 2 As shown, the cementing ball seat 6 may include a cementing ball seat body 61 and a first annular groove 62 formed on the outer circumference of the cementing ball seat body 61. In the initial state, the secondary shear pin 10 abuts the end of the first annular groove 62 near the lower joint 19, and the primary shear pin 9 is fixedly connected to the outside of the first annular groove 62. After the primary shear pin 9 is sheared off, the cementing ball seat 6 descends, causing the secondary shear pin 10 to slide upward relative to the cementing ball seat 6 within the first annular groove 62 until the secondary shear pin 10 abuts the end of the first annular groove 62 near the upper joint 1 and stops moving. After cementing is completed, the secondary shear pin 10 is sheared off by the end of the first annular groove 62 away from the lower joint, allowing the cementing ball seat 6 and the first setting ball 8 to escape from the fluid passage, that is, escape from the interior of the release tool 200 and fall into the casing 101. This embodiment is used to achieve locking and disengagement of the cementing ball seat 6 inside the cementing sleeve body 7, thereby controlling the opening of the mud injection channel. When the cementing ball seat 6 moves downward in the cementing sleeve body 7, the channel 25 on the cementing sleeve body 7 will be opened.
[0033] Furthermore, the cementing ball seat 6 can be arranged with two groups of pin holes (not shown in the figure) along the axial direction, and the lower ends of the first-level shear pin 9 and the second-level shear pin 10 can be installed in the two groups of pin holes respectively, and the upper ends are installed in the threaded holes on the cementing sleeve body 7.
[0034] In such Figure 1 and Figure 3In the preferred embodiment shown, the cleaning tool may also include a primary shear pin 23 and a secondary shear pin 24. The cleaning tool ball seat 16 is fixed to the cleaning tool body 14 by the primary shear pin 23, and the secondary shear pin 24 is used to limit the cleaning tool ball seat 16. In the high-pressure jet cleaning annulus mode, the second sealing ball 13 enters the fluid channel and pushes the cleaning tool ball seat 16 under the action of external pressure to cut off the primary shear pin 23, so that the cleaning tool ball seat 16 moves downward relative to the cleaning tool body 14 to the secondary shear pin 24 and stops moving, thereby connecting the fluid channel 26 with the nozzle 15 to achieve flushing. After the flushing is completed, the secondary shear pin 24 continues to be sheared, so that the cleaning tool ball seat 16 and the second sealing ball 13 are out of the fluid channel 26.
[0035] Specifically, combined Figure 1 and Figure 3 As shown, the cleaning tool ball seat 16 may include a cleaning tool ball seat body 161 and a second annular groove 162 formed on the outer circumference of the cleaning tool ball seat body 161. In the initial state, the secondary shear pin 24 abuts the end of the second annular groove 162 near the lower joint 19, and the primary shear pin 23 is fixedly connected to the outside of the second annular groove 162. After the primary shear pin 23 is sheared, the cleaning tool ball seat 16 moves downward, causing the secondary shear pin 24 to slide upward relative to the cleaning tool ball seat 16 within the second annular groove 162 until the secondary shear pin 24 abuts the end of the second annular groove 162 near the upper joint 1 and stops moving. After flushing is completed, the secondary shear pin 24 is sheared off by the end of the second annular groove 162 away from the lower joint, allowing the cleaning tool ball seat 16 and the second setting ball 13 to escape from the fluid passage, that is, escape from the interior of the release tool 200 and fall into the sleeve 101. This embodiment is used to lock and release the cleaning tool ball seat 16 inside the cleaning tool body 14, thereby controlling the opening of the high-pressure cleaning channel. When the cleaning tool ball seat 16 descends in the cleaning tool body 14, the nozzle 15 on the cleaning tool body 14 will be opened.
[0036] Furthermore, the cleaning tool ball seat 16 may be arranged with two groups of pin holes (not shown in the figure) along the axial direction, and the lower ends of the first-level shear pins 23 and the second-level shear pins 24 are respectively installed in the two groups of pin holes, and the upper ends are installed in the threaded holes on the cleaning tool body 14.
[0037] In a preferred embodiment, Figure 1 As shown, the nozzle 15 can be provided in multiple forms, and the spraying direction of each nozzle 15 is different. Preferably, the tubing string can be rotated forward during the cleaning process to enable the nozzle 15 to achieve the best fluid flow rate and annulus cleaning efficiency.
[0038] In such Figure 1In the preferred embodiment shown, a sealing spacer ring 12 may be further provided between the opposite ends of the cementing sleeve body 7 and the cleaning tool body 14 to ensure a sealed connection between the ends of the cementing sleeve body 7 and the cleaning tool body 14 .
[0039] The following combination Figure 1 、 Figure 7 、 Figure 8 as well as Figure 9 The working principle of the integrated high-pressure flushing and cementing plug tool 100 of the present invention is described as follows:
[0040] like Figure 1 and Figure 8 As shown, the second setting ball 13 is dropped into the fluid passage 26 onto the cleaning tool ball seat 16. Liquid A is then pumped into the tool to the setting pressure, shearing the primary shear pins 23 of the cleaning tool ball seat 16. Under the action of the hydraulic pressure, the cleaning tool ball seat 16 descends along the inner wall of the cleaning tool body 14 until it stops sliding under the resistance of the secondary shear pins 24. At this point, the cleaning tool ball seat 16 is released from its sealed position, and the cleaning passage provided in the cleaning tool body 14 is opened. High-pressure cleaning fluid flows through the nozzle 15, penetrates the multiple perforations 1001 in the perforation section C1 of the casing 101, and thoroughly cleans the annulus.
[0041] like Figure 1 and Figure 9 As shown, after the full-bore tubing string is cleaned, the pressure suddenly drops to zero, and the cementing function of the integrated high-pressure flushing and cementing plug tool 100 is activated through the ball-dropping mechanism. A first sealing ball 8 is dropped into the fluid channel 26 onto the cementing ball seat 6, forming a localized sealed space within the cementing plug tool. Cement B is then injected into the cementing plug tool to the setting pressure. The primary shear pins 9 of the cementing ball seat 6 are sheared off by the shear force, and the cementing ball seat 6 slides along the inner wall of the cementing sleeve body 7 under the action of hydraulic pressure until it encounters resistance from the secondary shear pins 10 and stops sliding. At this point, the cementing ball seat 6 is released from its sealed position, and the perforations 25 in the cementing sleeve body 7 are opened, thereby opening the cementing channel. Under the influence of liquid pressure and gravity, cement slurry penetrates the multiple perforations 1001 in the perforated section C2 of the casing 101 through the cementing channel, squeezing the plugging material across the cross-section. The plugging material is effectively squeezed into the wellbore and annulus, leaving a uniform, sealed cement plug in the plugged area.
[0042] After the plugging material is completed, Figure 7As shown, taking reverse circulation well washing as an example, the entire tool is lifted to the blind pipe section, and the washing fluid enters from the annulus between the tool and the casing, enters the tool clamp wall cavity (i.e., the first channel 32, the second channel 71, the third channel 141 and the fourth channel 42) through the first washing hole 31 on the first bowl packer body 2, and flows out of the tool clamp wall cavity through the second washing hole 41 on the second leather cup packer body 20. Finally, the washing fluid is returned through the fluid channel 26 in the middle of the tool. This process can wash out the residual cement slurry in the pipe string, keep the tool and drill pipe clean, and complete the cleaning of the wellbore at the same time.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.
Claims
1. An integrated high-pressure flushing and cementing plugging tool, characterized in that: include: A tool body, the tool body comprising an upper joint, an upper connector, a cementing sleeve body, a short connector, a cleaning tool body, a lower connector, and a lower joint, which are coaxially connected in sequence, and an axially penetrating fluid passage is formed inside the tool body; a first leather cup packer sleeved on the outer periphery of the upper connector and a second leather cup packer sleeved on the outer periphery of the lower connector; a cementing plug tool, the cementing plug tool comprising a cementing ball seat fixed in the cementing sleeve body, and a first setting ball, wherein a hole is formed on the outer peripheral wall of the cementing sleeve body, and the cementing ball seat initially blocks the hole; and The cleaning tool comprises a cleaning tool ball seat fixed in the cleaning tool body and a second sealing ball. A nozzle is formed on the outer peripheral wall of the cleaning tool body. The cleaning tool ball seat covers the nozzle in the initial state. Among them, the integrated high-pressure flushing and cementing plug tool is constructed to have a high-pressure jet cleaning annulus mode: the second sealing ball enters the fluid channel and, under the action of external pressure, pushes the cleaning tool ball seat downward relative to the cleaning tool body to connect the fluid channel with the nozzle; and a cementing mode: the first sealing ball enters the fluid channel and, under the action of external pressure, pushes the cementing ball seat downward relative to the cementing sleeve body to connect the fluid channel with the hole.
2. The integrated high-pressure flushing and cementing plugging tool according to claim 1, characterized in that: The first leather cup packer includes a first leather cup packer body sleeved on the outer circumference of the upper connector, two groups of first leather cups sequentially sleeved on the first leather cup packer body, and a first spacer ring located between the two groups of first leather cups; the second leather cup packer includes a second leather cup packer body sleeved on the outer circumference of the lower connector, two groups of second leather cups sequentially sleeved on the second leather cup packer body, and a second spacer ring located between the two groups of second leather cups.
3. The integrated high-pressure flushing and cementing plugging tool according to claim 2, characterized in that: Copper rings are respectively provided between the upper joint and the end face of the first leather cup packer body, between the first leather cup packer body and the end face of the cementing sleeve body, between the second leather cup packer body and the end face of the cleaning tool body, and between the second leather cup packer body and the lower joint.
4. The integrated high-pressure flushing and cementing plugging tool according to any one of claims 1 to 3, characterized in that: The cementing plug tool also includes a primary shear pin and a secondary shear pin, the cementing ball seat is fixed to the cementing sleeve body by the primary shear pin, and the secondary shear pin is used to limit the cementing ball seat. In the cementing mode, the first sealing ball enters the fluid channel and pushes the cementing ball seat to shear the primary shear pin under the action of external pressure, so that the cementing ball seat descends relative to the cementing sleeve body to the secondary shear pin and stops moving, thereby connecting the fluid channel with the hole to realize cementing. After the cementing is completed, the secondary shear pin continues to be sheared to make the cementing ball seat and the first sealing ball escape from the fluid channel.
5. The integrated high-pressure flushing and cementing plugging tool according to claim 4, characterized in that: The cementing ball seat includes a cementing ball seat body and a first annular groove formed on the outer circumference of the cementing ball seat body. In an initial state, the secondary shear pin abuts against one end of the first annular groove close to the lower joint, and the primary shear pin is fixedly connected to the outside of the first annular groove; after the primary shear pin is sheared off, the cementing ball seat descends so that the secondary shear pin slides upward relative to the cementing ball seat in the first annular groove until the secondary shear pin abuts against one end of the first annular groove close to the upper joint and stops moving.
6. The integrated high-pressure flushing and cementing plugging tool according to any one of claims 1 to 3, characterized in that: The cleaning tool also includes a primary shear pin and a secondary shear pin, the cleaning tool ball seat is fixed to the cleaning tool body by the primary shear pin, and the secondary shear pin is used to limit the cleaning tool ball seat. In the high-pressure jet cleaning annulus mode, the second sealing ball enters the fluid channel and pushes the cleaning tool ball seat to cut the primary shear pin under the action of external pressure, so that the cleaning tool ball seat descends relative to the cleaning tool body to the secondary shear pin and stops moving, thereby connecting the fluid channel with the nozzle to achieve flushing. After the flushing is completed, the secondary shear pin continues to be sheared, so that the cleaning tool ball seat and the second sealing ball are out of the fluid channel.
7. The integrated high-pressure flushing and cementing plugging tool according to claim 6, characterized in that: The cleaning tool ball seat includes a cleaning tool ball seat body and a second annular groove formed on the outer circumference of the cleaning tool ball seat body. In an initial state, the secondary shear pin abuts against one end of the second annular groove close to the lower joint, and the primary shear pin is fixedly connected to the outside of the second annular groove; after the primary shear pin is sheared off, the cleaning tool ball seat descends so that the secondary shear pin slides upward in the second annular groove relative to the cleaning tool ball seat until the secondary shear pin abuts against one end of the second annular groove close to the upper joint and stops moving.
8. The integrated high-pressure flushing and cementing plugging tool according to claim 2, characterized in that: A first well-washing hole is formed in the area of the first leather cup packer body between the upper joint and the adjacent first leather cup, a first passage communicating with the first well-washing hole is formed between the first leather cup packer body and the upper connector, a second passage and a third passage are formed inside the outer walls of the cementing sleeve body and the cleaning tool body, a second well-washing hole is formed in the area of the second leather cup packer body between the lower joint and the adjacent second leather cup, a fourth passage communicating with the second well-washing hole is formed between the second leather cup packer body and the lower connector, and the integrated The high-pressure flushing and cementing plug tool also includes a well washing mode after cementing is completed: the first channel, the second channel, the third channel and the fourth channel are connected, and the well washing fluid enters the first channel, the second channel, the third channel and the fourth channel in sequence through the annulus between the casing and the integrated high-pressure flushing and cementing plug tool, and is then discharged from bottom to top through the fluid channel, or the well washing fluid enters through the fluid channel and passes through the fourth channel, the third channel, the second channel and the first channel in sequence, and is then discharged from the annulus between the casing and the integrated high-pressure flushing and cementing plug tool.
9. The integrated high-pressure flushing and cementing plugging tool according to any one of claims 1 to 3, characterized in that: The upper joint, the upper connector, the cementing sleeve body, the short connector, the cleaning tool body, the lower connector and the lower joint are coaxially threadedly connected in sequence.
10. The integrated high-pressure flushing and cementing plugging tool according to any one of claims 1 to 3, characterized in that: A sealing ring is further provided between the ends of the cementing sleeve body and the cleaning tool body that are opposite to each other.