High temperature high pressure bushing patch repair tool

Abstract

The utility model discloses a high temperature high pressure bushing subsidy repair tool, including the lifting joint, the inside surface of lifting joint is connected through the thread connection with pressure transmission pipe, the outside surface of lifting joint is connected with the thread connection of hanger, the hanger is through the hooking of piston connecting rod hook and liquid cylinder hook each other, pressure transmission pipe and hanger inside pass through have the damping lifting nipple, one end of liquid cylinder hook is connected with the thread connection of primary liquid cylinder, one end of primary liquid cylinder is connected with secondary liquid cylinder, primary liquid cylinder inside pass through have primary piston connecting rod, one end of primary piston connecting rod is connected with the thread connection of damping lifting nipple, and the other end passes through secondary liquid cylinder and is connected with the thread connection of tertiary piston connecting rod in tertiary liquid cylinder, and this high temperature high pressure bushing subsidy repair tool can work under the environment of deep well high temperature high pressure, and the compression resistance is strong, can inject the cementing of colloid cement, and the deep well repair ability is improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas drilling engineering technology, specifically a high-temperature and high-pressure casing repair tool. Background Technology

[0002] During oil and gas extraction, downhole casing is subjected to high temperatures, high pressures, corrosion, and formation stress for extended periods, making it prone to damage, perforation, and deformation. This not only leads to decreased oil and gas well production and shortened casing lifespan but may also cause safety accidents such as blowouts and formation contamination. Therefore, timely repair of damaged casing is essential.

[0003] Existing casing repair tools cannot be cemented with gel or gel cement, nor can they be used for ultra-long casing repairs. They also have low pressure resistance and cannot be adapted to the high-temperature and high-pressure environment of existing deep wells. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-temperature and high-pressure casing repair tool that can operate in the high-temperature and high-pressure environment of deep wells, while having strong pressure resistance and being able to inject gel cement for cementing, effectively solving the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature and high-pressure sleeve repair tool, including a lifting joint, the inner side of the lifting joint being connected to the pressure transmission pipe by a thread, the outer side of the lifting joint being connected to the hanger by a thread, and the hanger being hooked to the hydraulic cylinder hook by a piston connecting rod hook. The pressure transmission pipe and the suspension device have a shock-absorbing lifting section passing through them. One end of the hydraulic cylinder hook is threadedly connected to the first-stage hydraulic cylinder. One end of the first-stage hydraulic cylinder is connected to the second-stage hydraulic cylinder. A first-stage piston rod passes through the first-stage hydraulic cylinder. One end of the first-stage piston rod is threadedly connected to the shock-absorbing lifting section, and the other end passes through the second-stage hydraulic cylinder and is threadedly connected to the third-stage piston rod located in the third-stage hydraulic cylinder. One end of the second-stage hydraulic cylinder is threadedly connected to the third-stage hydraulic cylinder. A mortar plug is provided inside the third-stage piston rod. The mortar plug is located at the front end of the pressure relief hole on the third-stage piston rod. One end of the three-stage hydraulic cylinder is connected to the regulator, one end of the regulator is connected to the upper metal packer, one end of the upper metal packer is connected to the auxiliary tube by a thread, one end of the auxiliary tube is connected to the support shear ring by a thread, one end of the support shear ring is connected to the lower metal packer by a thread, one end of the lower metal packer is connected to the seated shear ring, and one end of the seated shear ring is connected to the seated slip seat. The other end of the third-stage piston connecting rod is connected to the drill rod, which is located inside the upper metal packer, and the other end of the drill rod is connected to the seat seal connecting rod.

[0006] As a preferred embodiment of this utility model, a fixing pin is provided inside the piston rod hook, and a spring is sleeved on the outside of the fixing pin.

[0007] As a preferred embodiment of this utility model, a secondary piston is sleeved on the outer side of the primary piston connecting rod.

[0008] As a preferred technical solution of this utility model, a pressure relief valve is sleeved on the outer side of the three-stage piston connecting rod. The pressure relief valve corresponds to the position of the pressure relief hole and is used to adjust the opening and closing of the pressure relief hole on the three-stage piston connecting rod.

[0009] As a preferred embodiment of this utility model, an upper metal packer seat sleeve is provided between the regulator and the upper metal packer, and an upper metal packer sealing ring is pressed onto the outer side of the upper metal packer seat sleeve to fix the metal packer seat sleeve to the upper metal packer.

[0010] As a preferred embodiment of this utility model, a lower metal packer seat sleeve is provided between the lower metal packer and the seat shear ring, and a lower metal packer sealing ring is pressed onto the outer side of the lower metal packer seat sleeve to fix the lower metal packer seat sleeve to the lower metal packer.

[0011] As a preferred technical solution of this utility model, the outer side of the sealing link is provided with a support knife holder and a support knife seat, and the outer side of the support knife holder and the support knife seat are both provided with support blades, and the two support blades clamp the support shearing ring.

[0012] As a preferred embodiment of this utility model, the supporting knife holder is assembled inside the sealing knife holder and docks with the release clamp seat. The sealing knife holder is threadedly connected to the sealing scissor seat. The outer side of the sealing scissor seat is symmetrically provided with sealing scissor blades for clamping the sealing shearing ring.

[0013] As a preferred embodiment of this utility model, the outer side of the release slip seat is threadedly connected to a locking slip cylinder, the seat seal scissor seat is connected to the release slip seat via a push-in scissor pin, and the inner side of the release slip seat is equipped with locking slip teeth for locking the seat seal connecting rod.

[0014] As a preferred technical solution of this utility model, the outer side of the seat seal is equipped with seat seal teeth, and the seat seal teeth are fixedly connected to the locking seal cylinder by seat seal shear pins.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) The hydraulic cylinder and piston connecting rod adopt a hook clutch device to assist the tool in the downhole unblocking and retrieval process, and the hydraulic cylinder can be continuously reset and continue to work downhole; (2) The two ends of the assist pipe of this utility model are sealed with metal packers, and the entire assist pipe and assist tool are suspended by supporting slips. The space between the assist pipe and the casing ring is filled with gel cement to cement the well, which increases the casing damage repair strength, pressure resistance exceeding 150MPa, temperature resistance exceeding 500°C, and impact resistance greater than 100 tons, thus improving the ability to withstand high temperature and high pressure, and the pressure resistance is greatly improved; (3) The automatic synchronous hook clutch, the metal packer seat, the supporting slip anchoring, the opening of the circulation system function, and the circulation well washing process complete several operation procedures at one time, which meets the safety operation requirements of the automated design. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the present invention after removing the ash-replacing rubber plug; Figure 3 This is a schematic diagram of the structure during cement grout injection; Figure 4 This is a schematic diagram of the structure in which the circulating fluid passes through; Figure 5 This is a schematic diagram of the upper and lower metal packers. Figure 6 This is a schematic diagram of the structure of the ash-replacement rubber stopper; Figure 7 This is a structural diagram of the subsidy tool after it has been removed following the completion of the subsidy program.

[0017] In the diagram: 1. Lifting joint; 2. Pressure transmission pipe; 3. Hanger; 4. Fixing pin; 5. Spring; 6. Piston connecting rod hook; 7. Hydraulic cylinder hook; 8. Shock-absorbing lifting sub; 9. First-stage hydraulic cylinder; 10. First-stage piston connecting rod; 11. Second-stage hydraulic cylinder; 12. Second-stage piston; 13. Third-stage hydraulic cylinder; 14. Third-stage piston connecting rod; 15. Lime plug; 16. Regulator; 17. Pressure relief valve; 18. Upper metal packer seat sleeve; 19. Upper metal packer sealing ring; 20. Upper metal packer; 21. Drill pipe; 22. Seat seal. 23. Rod, 24. Subsidy tube, 25. Support blade holder, 26. Support blade holder, 27. Support shearing ring, 28. Lower metal packer, 29. Lower metal packer sealing ring, 30. Lower metal packer seat sleeve, 31. Seat seal blade holder, 32. Seat seal shearing ring, 33. Seat seal scissor blade, 34. Seat seal scissor seat, 35. Push shear pin, 36. Release slip seat, 37. Locking slip cylinder, 38. Locking slip tooth, 39. Seat seal slip seat, 40. Seat seal slip tooth, 41. Seat seal slip shear pin. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-2 This utility model provides a technical solution: a high temperature and high pressure sleeve repair tool, including a lifting joint 1, the inner side of the lifting joint 1 is connected to the pressure transmission pipe 2 by a thread, the outer side of the lifting joint 1 is connected to the hanger 3 by a thread, the hanger 3 is hooked to the hydraulic cylinder hook 7 by a piston rod hook 6, a fixing pin 4 is provided inside the piston rod hook 6, and a spring 5 is sleeved on the outside of the fixing pin 4. The fixing pin 4 and the spring 5 serve to control the piston rod hook 6 to unhook and hook to each other. The shock-absorbing lifting section 8 passes through the suspension 3 and the pressure transmission pipe 2 and is assembled together to transmit pressure and reduce shock. One end of the hydraulic cylinder hook 7 is threadedly connected to the first-stage hydraulic cylinder 9, and one end of the first-stage hydraulic cylinder 9 is connected to the second-stage hydraulic cylinder 11. A first-stage piston rod 10 passes through the first-stage hydraulic cylinder 9. One end of the first-stage piston rod 10 is threadedly connected to the shock-absorbing lifting section 8, and the other end passes through the second-stage hydraulic cylinder 11 and is threadedly connected to the third-stage piston rod 14 located in the third-stage hydraulic cylinder 13. One end of the second-stage hydraulic cylinder 11 is threadedly connected to the third-stage hydraulic cylinder 13. A mortar plug 15 is installed in the third-stage piston rod 14. The mortar plug 15 is located at the front end of the pressure relief hole on the third-stage piston rod 14. The second-stage piston 12 is fitted in series with the first-stage piston rod 10, the third-stage hydraulic cylinder 13, and the third-stage piston rod 14. The third-stage piston rod 14 is connected to the drill rod 21 and the seat seal rod 22 to form a hydraulic seat seal tool. In order to reduce the operating pressure, multiple hydraulic cylinder piston rods can be connected in series. One end of the three-stage hydraulic cylinder 13 is connected to the regulator 16, and one end of the regulator 16 is connected to the upper metal packer 20. An upper metal packer seat sleeve 18 is provided between the regulator 16 and the upper metal packer 20. An upper metal packer sealing ring 19 is pressed onto the outer surface of the upper metal packer seat sleeve 18, forming the upper metal packer assembly. One end of the upper metal packer 20 is connected to the auxiliary tube 23 via a thread, and one end of the auxiliary tube 23 is connected to the supporting shear ring 27 via a thread. One end of 27 is connected to the lower metal packer 28 via a threaded connection. A lower metal packer seat sleeve 30 is provided between the lower metal packer 28 and the seat shear ring 32. A lower metal packer sealing ring 29 is pressed onto the outer side of the lower metal packer seat sleeve 30 to fix the lower metal packer seat sleeve 30 and the lower metal packer 28 to form a lower metal packer assembly. One end of the lower metal packer 28 is connected to the seat shear ring 32, and one end of the seat shear ring 32 is connected to the seat slip seat 39. Specifically, the other end of the third-stage piston connecting rod 14 is connected to the drill rod 21, which is located inside the upper metal packer 20, and the other end of the drill rod 21 is connected to the seat sealing connecting rod 22.

[0020] In this embodiment, a pressure relief valve 17 is sleeved on the outer side of the third-stage piston connecting rod 14. The pressure relief valve 17 corresponds to the position of the pressure relief hole and is used to adjust the opening and closing of the pressure relief hole on the third-stage piston connecting rod 14.

[0021] Furthermore, the outer side of the seated connecting rod 22 is provided with a support knife holder 24 and a support knife seat 26. The outer sides of the support knife holder 24 and the support knife seat 26 are both provided with support blades 25. The two support blades 25 clamp the support shearing ring 27, which serves to support the entire subsidy tube 23 and the suspension of the subsidy tool.

[0022] Furthermore, the support knife holder 26 is assembled inside the sealing knife holder 31 and docks with the release slip seat 36. The sealing knife holder 31 is threadedly connected to the sealing scissor seat 34. The outer side of the sealing scissor seat 34 is symmetrically provided with sealing scissor blades 33, which are used to clamp the sealing shear ring 32 and play the role of compressing the upper and lower metal packers to set.

[0023] Furthermore, the release slip seat 36 is connected to the locking slip cylinder 37 by a left-hand threaded connection, and the seat seal scissor seat 34 is connected to the release slip seat 36 by pushing the scissor pin 35. The inner side of the release slip seat 36 is equipped with locking slip teeth 38 for locking the seat seal connecting rod 22.

[0024] Furthermore, a seated slip tooth 40 is installed on the outer side of the seated slip seat 39. The seated slip tooth 40 is fixed to the locking slip cylinder 37 by the seated slip shear pin 41, so that the seated slip tooth 40 is simultaneously anchored inside the sleeve, thereby supporting the weight of the auxiliary tool.

[0025] like Figure 3 As shown, when the calculated amount of cement slurry is injected, the displacement plug 15 is placed at the wellhead on the surface. Then, the pump continues to operate. The displacement plug 15, under the pressure of the displacement fluid, pushes the cement slurry into the space between the auxiliary pipe 23 and the casing annulus. The displacement plug 15 begins to press against the surface. Under the pressure, the first-stage piston connecting rod 10, the second-stage piston 12, the third-stage piston connecting rod 14, the drill pipe 21, and the seat sealing connecting rod 22 begin to move upward. At the same time, the seat sealing connecting rod 22 drives the locking slip teeth 38 to move. When the locking slip tooth 38 is activated, it pushes the release slip seat 36 and the locking slip cylinder 37 to push the support knife seat 26, support knife holder 24, support blade 25, and support knife seat 26 to shear the support shearing ring 27. At the same time, the setting slip tooth 40, driven by the locking slip cylinder 37, cuts the setting slip shear nail 41 and pushes the setting slip seat 39 cone body to synchronously set and anchor. At this time, the pump continues to pressurize the setting connecting rod 22, which drives the following setting system to start compressing the upper and lower metal packers to start setting. like Figure 4 and Figure 6 Continue pumping and pressurizing. The seated seal connecting rod 22 moves the locking slip tooth 38, which in turn pushes the release slip seat 36 to move. The release slip seat 36 then moves the locking slip cylinder 37. Simultaneously, the release slip seat 36 pushes the seated seal shear seat 34, seated seal shear blade 33, seated seal shear ring 32, seated seal knife holder 31, and lower metal packer seated seal sleeve 30 upwards. At the same time, the three-stage hydraulic cylinder 13 pushes the adjuster 16 downwards, compressing the upper metal packer sealing ring 19 and the lower metal packer sealing ring 29 to expand the seated seal. When the seated seal pressure reaches the design pressure value, the seated seal shear ring 32 shears. At this time, the three... The pressure relief valve 17 on the upper piston rod 14 is blocked outside the third-stage hydraulic cylinder 13. The pressure relief hole of the third-stage piston rod 14 enters the third-stage hydraulic cylinder 13. The circulating fluid is discharged through the upper pressure relief hole of the third-stage piston rod 14 and passes around the mortar plug 15 in the third-stage hydraulic cylinder 13 to enter the lower pressure relief hole of the third-stage piston rod 14. It establishes circulation in the auxiliary pipe 23 through the drill pipe 21 and the seated connecting rod 22 to flush out excess cement slurry. Because the upper metal packer sealing ring 19 and the lower metal packer sealing ring 29 are in the seated state, circulation can only be established through the drill pipe 21, the seated connecting rod 22 and the auxiliary pipe 23. The auxiliary tool is retrieved after more than one cycle of circulation.

[0026] like Figure 5 and Figure 7 After the subsidy is completed, the tools are pulled out of the wellbore, and the following components are installed downhole: upper metal packer seat sleeve 18, upper metal packer sealing ring 19, upper metal packer 20, subsidy pipe 23, support shear ring 27, lower metal packer 28, lower metal packer sealing ring 29, lower metal packer seat sleeve 30, seat shear ring 32, seat slip seat 39, seat slip tooth 40, and cement sheath to seal the damaged casing and restore the oil and gas well's production capacity.

[0027] The design and assembly structure of the suspension device 3, fixing pin 4, spring 5, piston rod hook 6, hydraulic cylinder hook 7, and shock-absorbing lifting short section 8 of this utility model can achieve automatic release of the hydraulic cylinder and piston rod fixing device. This utility model employs a composite subsidy technology for metal packer sealing, consisting of an upper metal packer seat sleeve 18, an upper metal packer sealing ring 19, an upper metal packer 20, a subsidy pipe 23, a lower metal packer 28, a lower metal packer sealing ring 29, and a lower metal packer seat sleeve 30, which involves injecting gelatinous cement slurry or high-temperature gelatinous cementing into the well. This technology meets the requirements for high temperature and high pressure resistance after repair.

[0028] This utility model employs a pressure relief valve 17 that automatically opens after the sealing is completed, thus achieving the process of leaving no cement plug or drill plug after cementing. This utility model uses a supporting shear ring 27 to suspend the auxiliary pipe 23 and the auxiliary tool for weight suspension. The seated shear ring 32 compresses the upper metal packer sealing ring 19 and the lower metal packer sealing ring 29 to expand the seated seal to adapt to downhole casing damage repair such as casing cross-layer, casing damage, and casing bridging. This technology brings extraordinary economic benefits to oil extraction in solving casing damage well recovery.

[0029] The parts of the utility model not described in detail are prior art. Although embodiments of the utility model 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 utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-temperature and high-pressure casing patch repair tool, characterized in that: It includes a lifting joint (1), the inner side of which is connected to the pressure transmission pipe (2) by a thread, and the outer side of which is connected to the hanger (3) by a thread. The hanger (3) is hooked to the hydraulic cylinder hook (7) by a piston rod hook (6). The pressure transmission pipe (2) and the suspension device (3) have a shock-absorbing lifting section (8) passing through them. One end of the hydraulic cylinder hook (7) is threadedly connected to the first-stage hydraulic cylinder (9). One end of the first-stage hydraulic cylinder (9) is connected to the second-stage hydraulic cylinder (11). A first-stage piston rod (10) passes through the first-stage hydraulic cylinder (9). One end of the first-stage piston rod (10) is threadedly connected to the shock-absorbing lifting section (8), and the other end passes through the second-stage hydraulic cylinder (11) and is threadedly connected to the third-stage piston rod (14) located in the third-stage hydraulic cylinder (13). One end of the second-stage hydraulic cylinder (11) is threadedly connected to the third-stage hydraulic cylinder (13). A mortar plug (15) is provided inside the third-stage piston rod (14). The mortar plug (15) is located at the front end of the pressure relief hole on the third-stage piston rod (14). One end of the three-stage hydraulic cylinder (13) is connected to the regulator (16), one end of the regulator (16) is connected to the upper metal packer (20), one end of the upper metal packer (20) is connected to the subsidy tube (23) by a thread, one end of the subsidy tube (23) is connected to the support shear ring (27) by a thread, one end of the support shear ring (27) is connected to the lower metal packer (28) by a thread, one end of the lower metal packer (28) is connected to the seated shear ring (32), and one end of the seated shear ring (32) is connected to the seated slip seat (39). The other end of the third-stage piston connecting rod (14) is connected to the drill rod (21), which is located inside the upper metal packer (20). The other end of the drill rod (21) is connected to the seat sealing connecting rod (22).

2. The high-temperature and high-pressure casing patching and repair tool according to claim 1, characterized in that: The piston rod hook (6) is provided with a fixing pin (4) inside, and a spring (5) is sleeved on the outside of the fixing pin (4).

3. The high-temperature and high-pressure casing patch repair tool according to claim 1, characterized in that: The outer side of the first-stage piston connecting rod (10) is fitted with a second-stage piston (12).

4. The high-temperature and high-pressure casing patching and repair tool according to claim 1, characterized in that: A pressure relief valve (17) is sleeved on the outer side of the third-stage piston connecting rod (14). The pressure relief valve (17) corresponds to the position of the pressure relief hole and is used to adjust the opening and closing of the pressure relief hole on the third-stage piston connecting rod (14).

5. The high-temperature and high-pressure casing patching and repair tool according to claim 1, characterized in that: An upper metal packer seat sleeve (18) is provided between the regulator (16) and the upper metal packer (20). An upper metal packer sealing ring (19) is pressed onto the outer side of the upper metal packer seat sleeve (18) to fix the metal packer seat sleeve (18) to the upper metal packer (20).

6. The high-temperature and high-pressure casing patching and repair tool according to claim 1, characterized in that: A lower metal packer seat sleeve (30) is provided between the lower metal packer (28) and the seat shear ring (32). A lower metal packer sealing ring (29) is pressed onto the outer side of the lower metal packer seat sleeve (30) to fix the lower metal packer seat sleeve (30) to the lower metal packer (28).

7. The high-temperature and high-pressure casing patching and repair tool according to claim 1, characterized in that: The outer side of the seated connecting rod (22) is provided with a support knife holder (24) and a support knife seat (26). The outer side of the support knife holder (24) and the support knife seat (26) are provided with support blades (25). The two support blades (25) clamp the support shearing ring (27).

8. The high-temperature and high-pressure casing patch repair tool according to claim 7, characterized in that: The support knife holder (26) is assembled inside the sealing knife holder (31) and docks with the release clamp seat (36). The sealing knife holder (31) is threadedly connected to the sealing scissor seat (34). The outer side of the sealing scissor seat (34) is symmetrically provided with sealing scissor blades (33) for clamping the sealing shear ring (32).

9. The high-temperature and high-pressure casing patch repair tool according to claim 8, characterized in that: The outer side of the release slip seat (36) is threadedly connected to a locking slip cylinder (37). The seat seal scissor seat (34) is connected to the release slip seat (36) by pushing scissor pins (35). The inner side of the release slip seat (36) is equipped with locking slip teeth (38) for locking the seat seal connecting rod (22).

10. A high-temperature and high-pressure casing patch repair tool according to claim 9, characterized in that: The outer side of the seated slip base (39) is equipped with seated slip teeth (40), and the seated slip teeth (40) are fixedly connected to the locking slip cylinder (37) by seated slip shear pins (41).

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