Grinding and flushing integrated tool for casing mud line suspension system-temporary abandoned well cap

Abstract

The invention discloses a grinding and flushing integrated tool for a casing mud line suspension system-temporary well discarding cap, which relates to the technical field of grinding and flushing and comprises a casing suspension system, a drill rod mounted on the casing suspension system, cutting teeth mounted on the drill rod and a high-pressure flushing hole formed in the drill rod. The grinding and flushing integrated tool for the casing mud line suspension system and the temporary well abandoning cap further comprises a stabilizing device installed on the casing mud line suspension system. The stabilizing device comprises a stabilizing mechanism and a protecting mechanism; wherein the stabilizing mechanism comprises an electric telescopic rod arranged on a casing suspension system, a connecting plate fixedly installed at the output end of the electric telescopic rod and a centralizing block fixedly installed on the connecting plate, and the centralizing block moves to make contact with the well wall so that the whole grinding and flushing integrated tool can be positioned in the center position to be aligned with a temporary well abandoning cap; and accurate grinding of the cutting teeth is guaranteed, eccentric wear is avoided, and the well cap is not damaged.

Description

Technical Field

[0001] This invention relates to the field of grinding and flushing technology, specifically to an integrated grinding and flushing tool for a casing mudline suspension system-temporary wellhead cap. Background Technology

[0002] The integrated grinding and flushing tool for temporary abandoned well caps is a special downhole tool designed for cleaning and repairing temporary abandoned well caps. It integrates grinding and high-pressure flushing functions, completing surface repair, debris removal, and debris return in one drilling run, avoiding multiple trips to and from the well.

[0003] Patent publication number CN206174924U relates to the field of grinding and flushing technology. It comprises four parts: a high-efficiency rotary flushing head, a ball seat sub, a load indicator connector, and a sealing test sub. The entire tubing string has internal liquid flow channels. The high-efficiency rotary flushing head is designed with nozzles in different directions, including radial, axial, and oblique, to flush impurities on the inner wall and bottom of the sand control tubing string under the action of high-pressure flushing fluid. The sealing test sub has two pressure test holes in the middle. This integrated flushing and sealing test tool allows for combined flushing and sealing operations, saving time. The target sealing cylinder is easier to identify through the positioning of the load indicator connector, resulting in more reliable sealing results. During the sealing operation of multiple sealing cylinders in a single well, the tool can be quickly tested for failure by secondary pressure testing of intact sealing cylinders downhole, rapidly determining the condition of the downhole tool without needing to retrieve it for surface pressure testing. The overall operation is simple, safe, reliable, and improves operational efficiency while saving operating costs.

[0004] The above solution simplifies the identification of the target sealing cylinder and makes the sealing verification results more reliable by using the load display connector for positioning. During the sealing verification operation of multiple sealing cylinders in a single well, the integrated tool can be quickly checked for failure by secondary pressure testing of intact sealing cylinders downhole, and the condition of the downhole tool can be quickly determined without having to retrieve the tool for pressure testing on the surface. The overall operation is simple, safe and reliable, improves operational efficiency, and saves operating costs. However, the above solution has the problem of difficulty in stabilizing the overall device during operation, which can easily cause the device to deviate and vibrate during operation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an integrated grinding and flushing tool for casing mudline suspension systems and temporary well abandonment caps, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a grinding and flushing integrated tool for a casing mudline suspension system-temporary well abandonment cap, comprising a casing suspension system, a drill pipe installed on the casing suspension system, cutting teeth installed on the drill pipe, and a high-pressure flushing hole opened on the drill pipe; the grinding and flushing integrated tool for a casing mudline suspension system-temporary well abandonment cap further comprises: a stabilizing device installed on the casing suspension system; The stabilizing device includes a stabilizing mechanism for stabilizing the overall operation during grinding and flushing of the abandoned well cap, and a protective mechanism for protecting the stabilizing mechanism during grinding and flushing operations. The stabilizing mechanism includes an electric telescopic rod mounted on the casing suspension system, a connecting plate fixedly mounted on the output end of the electric telescopic rod, and a centering block fixedly mounted on the connecting plate. When the integrated grinding and flushing tool, driven by the casing suspension system, begins to descend into the well and is about to contact the temporary well abandonment cap, the electric telescopic rod is activated synchronously. This causes the electric telescopic rod to push the connecting plate to move in the well wall direction. As the connecting plate moves, it drives the centering block to move in the same direction. The centering block's movement contacts the well wall, positioning the integrated grinding and flushing tool at its center and aligning it with the temporary well abandonment cap.

[0007] The protective mechanism includes a base plate fixedly installed on the casing suspension system, a protective plate fixedly installed on the base plate, a long rod fixedly installed on the base plate, a sealing plate slidably installed on the circumferential surface of the long rod, an inclined plate fixedly installed on the centralizing block, and an inclined block fixedly installed on the sealing plate. As the centralizing block moves and contacts the well wall, it drives the inclined plate to move synchronously. The inclined plate moves and no longer contacts the inclined block, pushing it. Then, under the action of the spring, the sealing plate begins to move along the long rod. The sealing plate moves and contacts the centralizing block, sealing the gap between the centralizing block and the casing suspension system.

[0008] The inclined panel and the inclined block are both inclined. The closed plate is in contact with the protective plate. A spring is provided between the closed plate and the bottom plate. The inclined surface ensures that the inclined panel can smoothly push the inclined block when it moves. The contact ensures that the closed plate can move normally. The spring ensures that the closed plate can achieve self-reset.

[0009] The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap also includes: a discharge device installed on the casing suspension system; The discharge device includes a discharge mechanism for discharging excess water after the grinding and flushing of the abandoned well cap is completed, and a reset mechanism for pushing the discharge mechanism back to its original position after the operation of the discharge mechanism is completed. The design of the emission and reset mechanisms ensures normal emission during operation and a reset effect after operation.

[0010] The discharge mechanism includes a connecting rod fixedly mounted on a closed plate, a second inclined plate fixedly mounted on the connecting rod, a rotating ring rotatably mounted on a base plate, a small circular plate fixedly mounted on the rotating ring, a vertical rod fixedly mounted on the rotating ring, and a third inclined plate fixedly mounted on the vertical rod. The connection rod moves in the same direction as the closed plate moves and resets, causing the second inclined plate to move in the same direction. The second inclined plate then contacts the third inclined plate and pushes it to move. The third inclined plate moves, causing the vertical rod to move synchronously. The vertical rod's movement causes the rotating ring to rotate, which in turn causes the small circular plate to rotate, opening the discharge hole on the base plate.

[0011] The reset mechanism includes two partition plates fixedly installed on the base plate, a fixed rod fixedly installed between the two partition plates, a sliding plate slidably installed on the circumferential surface of the fixed rod, a top rod fixedly installed on the sliding plate, and a contact plate fixedly installed on the top rod. The rotation of the rotating ring drives the small circular plate to start rotating and resetting. The rotation and reset of the small circular plate closes the discharge hole, preventing rock chips and debris from entering the closed plate recycling space between the base plate and the guard plate through the discharge hole. This protects the internal moving parts, avoids the moving parts from being stuck and worn by rock chips and other debris, and ensures stable operation of the tool.

[0012] The contact plate contacts the inclined plate three. The sides of the inclined plate two and the inclined plate three that contact each other are both set as inclined surfaces. The bottom plate has a discharge hole. A spring two is set between the slide plate and the partition plate. The contact plate is set to ensure that the contact plate can drive the inclined plate three to move and reset when it moves and resets. The inclined surface is set to ensure that the inclined plate two can smoothly push the inclined plate three when it moves. The discharge hole is set to ensure that effective discharge can be achieved. The spring two is set to ensure that the slide plate can achieve autonomous reset.

[0013] The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap also includes: an anti-clogging device installed on the casing suspension system; The anti-clogging device is used to prevent the discharge mechanism from being blocked by other impurities during operation, thus preventing obstructed discharge. By installing anti-clogging devices, we ensure that the emission system can carry out effective emission operations.

[0014] The anti-clogging device includes a fixed plate fixedly installed on the sleeve suspension system, an elastic telescopic rod fixedly installed on the fixed plate, a circular plate fixedly installed on the movable end of the elastic telescopic rod, a thin rod fixedly installed on the circular plate, an inclined rod fixedly installed on the rotating ring, a fixed block fixedly installed on the circular plate, and an inclined block two fixedly installed on the fixed block. The rotation of the rotating ring drives the small circular plate to start rotating and opening the discharge hole, while simultaneously driving the inclined rod to start rotating. When the inclined rod rotates, it no longer contacts and pushes the inclined block two to move. Subsequently, the circular plate begins to move under the drive of the movable end of the elastic telescopic rod. When the circular plate moves, it drives the thin rod to start moving in the same direction, and the thin rod moves and extends into the discharge hole.

[0015] The inclined rod and the inclined block 2 are both set as inclined surfaces on their sides. The size of the thin rod is smaller than the discharge hole opened on the base plate. The thin rod does not contact the discharge hole. By setting the inclined surfaces, it is ensured that the inclined rod can smoothly push the inclined block 2 when moving. By setting the size of the thin rod to be smaller than the discharge hole, it is ensured that the thin rod can extend into the discharge hole. By not contacting, it is ensured that the discharge hole can perform normal discharge work.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the integrated grinding and flushing tool is positioned in the center and aligned with the temporary well cap by the movement of the centralizing block and its contact with the well wall. This ensures precise grinding of the cutting teeth, preventing uneven grinding and damage to the well cap, thus avoiding uneven grinding or damage to the well cap. It also makes the device operate more smoothly, reducing vibration and jumping, and preventing severe vibration caused by eccentric rotation, which could lead to broken rods, missing teeth, or tool damage. The closing plate moves and contacts the centralizing block, sealing the gap between the centralizing block and the casing suspension system. This prevents rock cuttings and debris from getting stuck in the gap, which could prevent the centralizing block from resetting properly. It also protects the overall stabilizing mechanism, extends its service life, and makes the entire grinding and flushing tool more reliable and efficient.

[0017] 2. In this invention, the small circular plate rotates to open the discharge hole on the base plate. Subsequently, as the sealing plate moves and resets, it continuously squeezes the accumulated and residual flushing fluid between the guard plate and the base plate and discharges it through the discharge hole, allowing the flushing fluid to drain normally. This prevents the sealing plate from being stuck by the flushing fluid and unable to reset properly, ensuring that the sealing plate can move and reset flexibly and smoothly. This ensures reliable tool loading and unloading and safe drilling, while also protecting the mechanism from damage. The rotation of the rotating ring drives the small circular plate to start rotating and resetting. The rotation of the small circular plate closes the discharge hole, preventing rock cuttings and debris from entering the closed plate recovery space between the base plate and the guard plate through the discharge hole. This protects the internal moving parts and prevents them from being stuck and worn by rock cuttings and other debris, ensuring stable tool operation.

[0018] 3. In this invention, the circular plate moves, causing the thin rod to move in the same direction. The thin rod extends into the discharge hole, effectively clearing blockages, removing accumulated slag, and breaking up mud packs. This ensures that residual flushing fluid can be discharged smoothly through the discharge hole, preventing the sealing plate from failing to reset properly due to slag blockage or liquid jamming in the discharge hole. This improves the reliability of the tool's operation. The circular plate moves, causing the thin rod to move in the same direction. The thin rod is then pulled out of the discharge hole, effectively avoiding various operational hazards caused by the thin rod remaining. This ensures the smoothness of subsequent tool operations, structural integrity, and operational safety, and prevents the thin rod from obstructing the small circular plate from sealing the discharge hole. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the casing suspension system and drill pipe position structure of the present invention; Figure 3 This is a cross-sectional view of the stabilizing device structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at part A in the middle; Figure 5 This is a cross-sectional view of the location and structure of the emission device of the present invention; Figure 6 For the present invention Figure 6 Enlarged schematic diagram of the structure of part B in the middle; Figure 7 This is a cross-sectional view of the anti-clogging device of the present invention. Figure 8 This is a cross-sectional schematic diagram of the positional structure of the elastic telescopic rod and the circular plate of the present invention; Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure of part C in the middle.

[0020] The meanings of the labels in the diagram are as follows: 1. Casing suspension system; 2. Drill rod; 3. Cutting teeth; 4. High-pressure flushing hole; 5. Electric telescopic rod; 6. Connecting plate; 7. Straightening block; 8. Base plate; 9. Protective plate; 10. Long rod; 11. Sealing plate; 12. Inclined panel one; 13. Inclined block one; 141. Connecting rod; 142. Inclined panel two; 143. Rotary ring; 144. Small circular plate; 145. Vertical rod; 146. Inclined panel three; 147. Divider plate; 148. Fixing rod; 149. Slide plate; 1410. Top rod; 1411. Contact plate; 151. Fixing plate; 152. Elastic telescopic rod; 153. Circular plate; 154. Thin rod; 155. Inclined rod; 156. Fixing block; 157. Inclined block two. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-4 One embodiment of the present invention is: a grinding and flushing integrated tool for casing mudline suspension system-temporary well abandonment cap, which includes casing suspension system 1, drill pipe 2 installed on casing suspension system 1, cutting teeth 3 installed on drill pipe 2, and high-pressure flushing hole 4 opened on drill pipe 2. The grinding and flushing integrated tool for casing mudline suspension system-temporary well abandonment cap also includes: a stabilizing device installed on casing suspension system 1. The stabilization device includes a stabilization mechanism for stabilizing the overall operation during grinding and flushing of the abandoned well cap, and a protective mechanism for protecting the stabilization mechanism during grinding and flushing operations. The stabilizing mechanism includes an electric telescopic rod 5 installed on the casing suspension system 1, a connecting plate 6 fixedly installed on the output end of the electric telescopic rod 5, and a centering block 7 fixedly installed on the connecting plate 6. By moving the centering block 7 to contact the well wall, the entire grinding and flushing integrated tool is positioned in the center and aligned with the temporary well cap, ensuring that the cutting teeth 3 are ground accurately, without uneven grinding or damage to the well cap, and avoiding grinding the well cap off-center or ruining it. At the same time, it can make the device run more smoothly, reduce vibration and jumping, and avoid eccentric rotation that causes violent vibration, resulting in rod breakage, tooth loss, and tool damage.

[0023] The protective mechanism includes a base plate 8 fixedly installed on the casing suspension system 1, a guard plate 9 fixedly installed on the base plate 8, a long rod 10 fixedly installed on the base plate 8, a sealing plate 11 slidably installed on the circumferential surface of the long rod 10, an inclined plate 12 fixedly installed on the straightening block 7, and an inclined block 13 fixedly installed on the sealing plate 11. The sealing plate 11 moves to contact the straightening block 7, sealing the gap between the straightening block 7 and the casing suspension system 1, preventing rock chips and debris from getting stuck in the gap between the straightening block 7 and the casing suspension system 1, which would prevent the straightening block 7 from resetting properly. At the same time, it can protect the overall stability mechanism, extend its service life, and make the entire grinding and flushing tool more reliable and efficient.

[0024] The sides of the inclined panel 12 and the inclined block 13 that come into contact with each other are both set as inclined surfaces. The sealing plate 11 contacts the guard plate 9. A spring is set between the sealing plate 11 and the bottom plate 8. By setting the inclined surfaces, it is ensured that the inclined panel 12 can smoothly push the inclined block 13 when it moves. By contact, it is ensured that the sealing plate 11 can move normally. By setting the spring, it is ensured that the sealing plate 11 can achieve self-reset.

[0025] In this embodiment, before using the integrated grinding and flushing tool to grind and flush the temporary abandoned well cap, a professional worker needs to inspect the entire integrated grinding and flushing tool. After the worker has completed the inspection and confirmed that everything is correct, the worker connects the integrated grinding and flushing tool to the casing suspension system 1. After the connection is completed, the worker begins to use the integrated grinding and flushing tool to grind and flush the temporary abandoned well cap. The casing suspension system 1 drives the integrated grinding and flushing tool to start going down into the well. After the integrated grinding and flushing tool contacts the temporary abandoned well cap, it stops moving. Then, the cutting teeth 3 begin to grind under the drive of the drill pipe 2. At the same time as the cutting teeth 3 begin to grind, the high-pressure flushing hole 4 will spray flushing fluid to flush the impurities, scale, and debris generated during the grinding of the cutting teeth 3 on the temporary abandoned well cap. Then, the flushing fluid mixed with impurities and debris will be extracted from the well by the extraction device. As the casing suspension system 1 lowers the integrated grinding and flushing tool into the well and it is about to contact the temporary well cap, the electric telescopic rod 5 is activated simultaneously. This causes the electric telescopic rod 5 to push the connecting plate 6 to move towards the well wall. As the connecting plate 6 moves, it drives the centering block 7 to move in the same direction. The centering block 7 will contact the well wall, positioning the integrated grinding and flushing tool in the center position and aligning it with the temporary well cap. This ensures precise grinding of the cutting teeth 3, preventing uneven grinding and damage to the well cap, thus avoiding grinding the well cap off-center or rendering it unusable. Simultaneously, it makes the device operate more smoothly, reducing vibration and jumping, and preventing severe vibrations caused by eccentric rotation, which could lead to rod breakage, tooth loss, or tool damage. As the centering block 7 moves and contacts the well wall, it also drives the inclined plate 12 to move synchronously. The inclined plate 12 then moves away from contact with and pushes the inclined block. 13. Then, under the action of spring 1, the sealing plate 11 begins to move along the long rod 10. The sealing plate 11 moves and contacts the centralizing block 7, sealing the gap between the centralizing block 7 and the casing suspension system 1. This prevents rock cuttings and debris from getting stuck in the gap between the centralizing block 7 and the casing suspension system 1, causing the centralizing block 7 to fail to reset properly. At the same time, it can protect the overall stability mechanism, extend its service life, and make the entire grinding and flushing tool more reliable and efficient. After the grinding and flushing of the temporary abandoned well cap is completed, the electric telescopic rod 5 drives the connecting plate 6 and the centralizing block 7 to move and reset synchronously. Then, the centralizing block 7 drives the inclined plate 12 to start moving in the same direction. The inclined plate 12 moves and contacts the inclined block 13 and pushes it to start moving. The inclined block 13 moves and drives the sealing plate 11 to start moving in the same direction. The sealing plate 11 moves and resets.

[0026] Please see Figures 5-9 Based on the above embodiments, in another embodiment of the present invention, the grinding and flushing integrated tool for the casing mudline suspension system-temporary well abandonment cap further includes: a discharge device installed on the casing suspension system 1; The discharge device includes a discharge mechanism for discharging excess water after the grinding and flushing of the abandoned well cap is completed, and a reset mechanism for pushing the discharge mechanism back to its original position after the operation of the discharge mechanism is completed. The design of the emission and reset mechanisms ensures normal emission during operation and a reset effect after operation.

[0027] The discharge mechanism includes a connecting rod 141 fixedly mounted on the sealing plate 11, a second inclined plate 142 fixedly mounted on the connecting rod 141, a rotating ring 143 rotatably mounted on the base plate 8, a small circular plate 144 fixedly mounted on the rotating ring 143, a vertical rod 145 fixedly mounted on the rotating ring 143, and a third inclined plate 146 fixedly mounted on the vertical rod 145. The small circular plate 144 rotates to open the discharge hole on the base plate 8. Then, as the sealing plate 11 moves and resets, it continuously squeezes the accumulated and residual flushing fluid between the guard plate 9 and the base plate 8 and discharges it through the discharge hole, so that the flushing fluid can be discharged normally. This prevents the sealing plate 11 from being stuck by the flushing fluid and unable to reset normally, ensuring that the sealing plate 11 can move and reset flexibly and smoothly, ensuring reliable tool loading and unloading, safe drilling, and protecting the mechanism from damage.

[0028] The reset mechanism includes two partition plates 147 fixedly installed on the base plate 8, a fixed rod 148 fixedly installed between the two partition plates 147, a sliding plate 149 slidably installed on the circumferential surface of the fixed rod 148, a top rod 1410 fixedly installed on the sliding plate 149, and a contact plate 1411 fixedly installed on the top rod 1410. The rotation of the rotating ring 143 drives the small circular plate 144 to start rotating and resetting. The rotation and reset of the small circular plate 144 closes the discharge hole, preventing rock chips and debris from entering the recovery space of the closed plate 11 between the base plate 8 and the guard plate 9 through the discharge hole. This protects the internal moving parts, prevents the moving parts from being stuck and worn by rock chips and other debris, and ensures stable operation of the tool.

[0029] Contact plate 1411 contacts inclined plate 146. The sides of inclined plate 142 and inclined plate 146 that are in contact with each other are both set as inclined surfaces. A discharge hole is provided on the bottom plate 8. A spring is provided between the slide plate 149 and the partition plate 147. By setting the contact, it is ensured that the contact plate 1411 can drive the inclined plate 146 to move and reset when it moves. By setting the inclined surface, it is ensured that the inclined plate 142 can smoothly push the inclined plate 146 when it moves. By opening the discharge hole, it is ensured that effective discharge can be achieved. By setting the spring, it is ensured that the slide plate 149 can achieve self-reset.

[0030] The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap also includes: an anti-clogging device installed on casing suspension system 1; The anti-clogging device is used to prevent the emission mechanism from being blocked by other impurities during operation, thus preventing obstruction of the emission process; By installing anti-clogging devices, we ensure that the emission system can carry out effective emission operations.

[0031] The anti-clogging device includes a fixed plate 151 fixedly installed on the sleeve suspension system 1, an elastic telescopic rod 152 fixedly installed on the fixed plate 151, a circular plate 153 fixedly installed on the movable end of the elastic telescopic rod 152, a thin rod 154 fixedly installed on the circular plate 153, an inclined rod 155 fixedly installed on the rotating ring 143, a fixed block 156 fixedly installed on the circular plate 153, and an inclined block 157 fixedly installed on the fixed block 156. When the circular plate 153 moves, it drives the thin rod 154 to move in the same direction. The thin rod 154 moves and extends into the discharge hole, which can effectively clear blockages, discharge accumulated slag, and break up mud bags, ensuring that residual flushing fluid can be discharged smoothly through the discharge hole. This prevents the sealing plate 11 from failing to reset properly due to slag blockage or liquid jamming in the discharge hole, thus improving the reliability of the tool's operation.

[0032] The inclined rod 155 and the inclined block 157 are both inclined on the side that are close to each other. The size of the thin rod 154 is smaller than the discharge hole opened on the base plate 8. The thin rod 154 does not contact the discharge hole. By setting the inclined surface, it is ensured that the inclined rod 155 can smoothly push the inclined block 157 when it moves. By setting the size of the thin rod 154 to be smaller than the discharge hole, it is ensured that the thin rod 154 can be inserted into the discharge hole. By not contacting each other, it is ensured that the discharge hole can perform the discharge work normally.

[0033] In this embodiment, during operation: As the sealing plate 11 moves and resets, it simultaneously moves the connecting rod 141 in the same direction. This causes the connecting rod 141 to move the second inclined plate 142 in the same direction. The second inclined plate 142 then contacts the third inclined plate 146 and pushes it to move. The third inclined plate 146 moves, causing the vertical rod 145 to move synchronously. The vertical rod 145 then rotates the rotating ring 143, which in turn rotates the small circular plate 144. The rotation of the small circular plate 144 opens the discharge hole on the base plate 8. Subsequently, as the sealing plate 11 moves and resets, it continuously squeezes the accumulated and residual flushing fluid between the guard plate 9 and the base plate 8, discharging it through the discharge hole. This ensures the flushing fluid can be discharged normally, preventing the sealing plate 11 from being stuck by the flushing fluid and hindering its normal reset. This ensures the sealing plate 11 can move and reset flexibly and smoothly, guaranteeing reliable tool placement and removal, safe drilling, and protecting the mechanism from damage. Simultaneously, as the third inclined plate 146 moves, it contacts and pushes the contact plate 1411, causing the contact... Plate 1411 begins to move, causing push rod 1410 to move synchronously. As push rod 1410 moves, it causes slide plate 149 to move in the same direction as fixed rod 148. Slide plate 149's movement compresses spring 2 between it and partition plate 147. When the flushing fluid discharge stops, inclined plate 2 142 no longer contacts and pushes inclined plate 3 146. Subsequently, slide plate 149 begins to move and reset under the action of spring 2. The movement of slide plate 149 causes push rod 1410 and contact plate 1411 to move synchronously. The inclined plate 146 is pushed to start moving and resetting. The movement of the inclined plate 146 causes the vertical rod 145 to start moving. The movement of the vertical rod 145 causes the rotating ring 143 to start rotating. The rotation of the rotating ring 143 causes the small circular plate 144 to start rotating and resetting. The rotation of the small circular plate 144 closes the discharge hole, preventing rock chips and debris from entering the recovery space of the closed plate 11 between the base plate 8 and the guard plate 9 through the discharge hole. This protects the internal moving parts and prevents the moving parts from being stuck and worn by rock chips and other debris, ensuring the stable operation of the tool.

[0034] As the rotating ring 143 rotates, it drives the small circular plate 144 to rotate and open the discharge hole, simultaneously causing the inclined rod 155 to rotate. During rotation, the inclined rod 155 no longer contacts and pushes the inclined block 157 to move. Subsequently, the circular plate 153 begins to move under the influence of the movable end of the elastic telescopic rod 152. As the circular plate 153 moves, it drives the thin rod 154 to move in the same direction. The thin rod 154 extends into the discharge hole, effectively clearing blockages, discharging accumulated slag, and breaking up mud packs. This ensures that residual flushing fluid is smoothly discharged through the discharge hole, preventing the sealing plate 11 from failing to reset properly due to slag blockage or liquid jamming in the discharge hole, thus improving the reliability of the tool's operation. After discharge, the rotating ring 143 rotates... While the small circular plate 144 rotates to close the discharge hole, the inclined rod 155 also starts to rotate. The inclined rod 155 rotates and contacts the inclined block 157, pushing it to start moving. The movement of the inclined block 157 causes the fixed block 156 to start moving in the same direction. The movement of the fixed block 156 causes the circular plate 153 to start moving in the same direction. The movement of the circular plate 153 causes the thin rod 154 to start moving in the same direction. The thin rod 154 moves and is pulled out from inside the discharge hole, which can effectively avoid various operational hazards caused by the thin rod 154 being stuck. It ensures the smoothness of subsequent actions of the tool, the structural integrity and operational safety, and prevents the thin rod 154 from being stuck and obstructing the small circular plate 144 from closing the discharge hole.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding and flushing integrated tool for a casing mudline suspension system-temporary wellhead, comprising a casing suspension system (1), a drill pipe (2) mounted on the casing suspension system (1), cutting teeth (3) mounted on the drill pipe (2), and a high-pressure flushing hole (4) opened on the drill pipe (2), characterized in that, The grinding and flushing integrated tool for casing mudline suspension system-temporary well abandonment cap also includes: a stabilizing device installed on the casing suspension system (1); The stabilizing device includes a stabilizing mechanism for stabilizing the overall operation during grinding and flushing of the abandoned well cap, and a protective mechanism for protecting the stabilizing mechanism during grinding and flushing operations. The stabilizing mechanism includes an electric telescopic rod (5) mounted on the sleeve suspension system (1), a connecting plate (6) fixedly mounted on the output end of the electric telescopic rod (5), and a straightening block (7) fixedly mounted on the connecting plate (6).

2. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 1, characterized in that: The protective mechanism includes a base plate (8) fixedly installed on the sleeve suspension system (1), a guard plate (9) fixedly installed on the base plate (8), a long rod (10) fixedly installed on the base plate (8), a closed plate (11) slidably installed on the circumferential surface of the long rod (10), an inclined plate (12) fixedly installed on the straightening block (7), and an inclined block (13) fixedly installed on the closed plate (11).

3. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 2, characterized in that: The sides of the inclined panel (12) and the inclined block (13) that are in contact with each other are both set as inclined surfaces. The closed plate (11) is in contact with the guard plate (9). A spring is provided between the closed plate (11) and the bottom plate (8).

4. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 1, characterized in that: The grinding and flushing integrated tool for the casing mudline suspension system-temporary well cap also includes: a discharge device installed on the casing suspension system (1); The discharge device includes a discharge mechanism for discharging excess water after the grinding and flushing of the abandoned well cap is completed, and a reset mechanism for pushing the discharge mechanism back to its original position after the operation of the discharge mechanism is completed.

5. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 4, characterized in that: The emission mechanism includes a connecting rod (141) fixedly installed on the closed plate (11), a second inclined plate (142) fixedly installed on the connecting rod (141), a rotating ring (143) rotatably installed on the base plate (8), a small circular plate (144) fixedly installed on the rotating ring (143), a vertical rod (145) fixedly installed on the rotating ring (143), and a third inclined plate (146) fixedly installed on the vertical rod (145).

6. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 5, characterized in that: The reset mechanism includes two partition plates (147) fixedly installed on the base plate (8), a fixing rod (148) fixedly installed between the two partition plates (147), a sliding plate (149) slidably installed on the circumferential surface of the fixing rod (148), a top rod (1410) fixedly installed on the sliding plate (149), and a contact plate (1411) fixedly installed on the top rod (1410).

7. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 6, characterized in that: The contact plate (1411) contacts the inclined plate three (146), and the sides of the inclined plate two (142) and the inclined plate three (146) that contact each other are both set as inclined surfaces. The bottom plate (8) is provided with a discharge hole, and a spring two is provided between the sliding plate (149) and the partition plate (147).

8. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 1, characterized in that: The grinding and flushing integrated tool for the casing mudline suspension system-temporary well cap also includes: an anti-clogging device installed on the casing suspension system (1); The anti-clogging device is used to prevent the emission mechanism from being blocked by other impurities during operation, thus preventing obstructed emission.

9. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap as described in claim 8, characterized in that: The anti-clogging device includes a fixed plate (151) fixedly installed on the sleeve suspension system (1), an elastic telescopic rod (152) fixedly installed on the fixed plate (151), a circular plate (153) fixedly installed on the movable end of the elastic telescopic rod (152), a thin rod (154) fixedly installed on the circular plate (153), an inclined rod (155) fixedly installed on the rotating ring (143), a fixed block (156) fixedly installed on the circular plate (153), and an inclined block two (157) fixedly installed on the fixed block (156).

10. The integrated grinding and flushing tool for casing mudline suspension system-temporary well abandonment cap according to claim 9, characterized in that: The inclined rod (155) and the inclined block two (157) are both set as inclined surfaces on their sides. The size of the thin rod (154) is smaller than the discharge hole opened on the base plate (8). The thin rod (154) does not contact the discharge hole.

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