A multi-stage eccentric impact shaper

Abstract

The application discloses a multistage eccentric impact shaper, which comprises a first limiting assembly, an eccentric impact assembly, a second limiting assembly and a connecting assembly.The first limiting assembly comprises a first static roller, a first rolling column, a first limiting ring, a first bearing seat and a second limiting ring.The eccentric impact assembly comprises an impact piece, an eccentric impact ring, a hydraulic impact flow channel, an impact shell, a limiting column, an impact return spring and a third limiting ring.The second limiting assembly comprises a second static roller, a second bearing seat, a second rolling column, a fourth limiting ring and a ball.The connecting assembly comprises a joint, a hydraulic flow channel, a guide head, a pressure relief valve, a pressure relief port and a return spring.The connecting assembly connects the first limiting assembly, the eccentric impact assembly and the second limiting assembly with each other and is connected with an uphole control system.The power of the application is provided by a hydraulic cylinder, the shaper adopts a mode of rotating and eccentrically impacting at the same time, and the shaper can also be shaped by the ball when meeting resistance in the lowering process, so that the shaping efficiency is improved.

Description

Technical Field

[0001] This invention designs a multi-stage eccentric impact-type shaping device, belonging to the field of deformed sleeve repair. Background Technology

[0002] In oilfield development, the vast majority of oil and water wells rely on casing for well construction. These casings operate continuously in high-pressure, high-temperature, and corrosive environments, and after long-term service, they generally face challenges to structural integrity, such as deformation, bending, and diameter reduction. This type of damage prevents subsequent production tools (such as pumps and packers) from being properly installed, ultimately resulting in the failure of the wellbore access and the forced interruption or significant reduction in the efficiency of oil and water well production. Therefore, the development of an efficient casing deformation and reshaping tool is becoming increasingly critical.

[0003] To address the above issues, a multi-stage eccentric impact-type shaper is proposed to optimize the sleeve shaping technology and improve shaping efficiency. Summary of the Invention

[0004] To address the above problems, this invention proposes a multi-stage eccentric impact shaping device to improve the repair efficiency of deformed sleeves. This invention innovatively uses a combined repair method of eccentric impact and ball bearing shaping. Under the action of the top drive device, the shaping tool is rotated and impacted to achieve the repair purpose of the deformed sleeve, thereby improving the shaping efficiency.

[0005] The purpose of this invention is to provide a multi-stage eccentric impact shaping tool. This tool is first eccentrically ejected, and then, driven by the top drive device, it rotates and impacts the sleeve to change position to complete the shaping, thereby improving the shaping efficiency. The rotational impact shaping method can provide torque during the shaping process to prevent the drill from getting stuck. At the same time, the eccentric ejection method ensures a larger shaping range, which can also improve the shaping efficiency.

[0006] To achieve the above objectives, the present invention employs the following technical solution: A multi-stage eccentric impact shaping device, characterized by comprising a first limiting component, an eccentric impact component, a second limiting component, and a connecting component: The first limiting component includes: a first stationary roller, a first rolling column, a first limiting ring, a first bearing seat, and a second limiting ring; the first bearing seat is inserted on the hydraulic flow channel and its axial position is limited by the first limiting ring and the second limiting ring, which are limited by screws on both sides; several first rolling columns are embedded on the first bearing seat; the first stationary roller is nested outside the first rolling column and can rotate with it during eccentric impact shaping to ensure the axial position; The eccentric impact assembly includes: an impact piece, an eccentric impact ring, a hydraulic impact channel, an impact shell, a limiting post, an impact return spring, and a third limiting ring. The impact piece is fixed to the impact shell with screws, and the impact shell is nested on the eccentric impact ring. The eccentric impact ring has an axially symmetrical limiting hole and a hydraulic impact channel in its central through hole. A limiting post is installed in the limiting hole, and a return spring is installed on the limiting post. When liquid is injected, the impact shell protrudes to one side under pressure, and the protrusion distance is limited by the limiting post. The second limiting component includes: a second stationary roller, a second bearing housing, a second rolling column, a fourth limiting ring, and balls; the second bearing housing passes through the hydraulic flow channel and is limited in axial position on both sides by the third and fourth limiting rings, which are limited by screws; several second rolling columns are embedded in the second bearing housing, and the second stationary roller is nested on the outside of the second rolling column, which can rotate with it during eccentric impact shaping to ensure axial position; balls are embedded outside the second stationary roller to achieve rolling shaping. The connecting assembly includes: a connector, a hydraulic flow channel, a guide head, a pressure relief valve, a pressure relief port, and a return spring; one side of the hydraulic flow channel is connected to the connector via a thread, and the other side is connected to the guide head. The pressure relief valve is held between the guide head and the hydraulic flow channel, and the return spring is held in the guide head. When liquid is injected, the pressure relief valve moves downward to complete the pressure build-up. When the liquid injection stops, the pressure relief valve moves upward under the action of the return spring, and the liquid flows through the pressure relief port and flows out from between the guide head and the pressure relief valve to complete the pressure relief. At the same time, ball bearings are embedded in the guide head to achieve rolling and shaping.

[0007] As a further technical solution of the present invention, the outermost part of the eccentric impact assembly has an impact piece fixed to the impact shell by screws. The outer side of the impact piece is provided with a rectangular protrusion to increase the shaping force during shaping, improve the repair efficiency, and can be disassembled and replaced when wear or deformation of different sleeves occurs.

[0008] As a further technical solution of the present invention, the impact shell in the eccentric impact assembly is teardrop-shaped, which can be stuck when encountering a large sleeve deformation position, and thus successfully find the sleeve deformation position to complete the shaping.

[0009] Compared with the prior art, the beneficial effects of the present invention are: The eccentric impact of this invention generates a certain torque under the drive of the top drive device during the shaping process. Therefore, during the shaping process, both radial force and tangential force along the contact surface are generated, resulting in a larger shaping force, a faster shaping process, and a reduced shaping cycle. This invention features a novel eccentric impact component that occupies a small volume when contracted and has a large expansion range, making it suitable for sleeves of different sizes. The shaping range is also larger than that of traditional expansion shapers.

[0010] In terms of manufacturing process, the expansion piece of this invention is provided with rectangular protrusions. Based on the principle that the smaller the contact area, the greater the pressure, this method is used to reduce the contact area with the sleeve deformation position, thereby increasing the pressure and improving the repair effect.

[0011] This invention relies on a top drive to rotate and complete the shaping process, ensuring that the shaping is accurate in all directions. It avoids the problem of expansion sheet breakage caused by not knowing the azimuth angle of the sleeve transformer, and also provides good repair results.

[0012] In the eccentric impact assembly, the impact shell is teardrop-shaped. If it encounters a large sleeve deformation position, it can be stuck, and then the sleeve deformation position can be found smoothly to complete the shaping. There is also a gradual process during the shaping, which reduces the difficulty of shaping.

[0013] The multi-level design can repair sleeve deformation of different specifications, breaking the traditional repair method of inserting multi-specification shaping tools, saving time and economic costs. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] Figure 3 This invention relates to a hydraulic valve.

[0017] Figure 4 These are the front view and cross-sectional view of the impact shell of the present invention.

[0018] Figure 5 These are the rolling column and bearing housing in the limiting assembly of the present invention.

[0019] Figure 6 This is the operating state of the present invention.

[0020] Legend: 1-First limiting assembly, 2-Eccentric impact assembly, 3-Second limiting assembly, 4-Connecting assembly, 101-First stationary roller, 102-First rolling column, 103-First limiting ring, 104-First bearing housing, 105-Second limiting ring, 201-Impact piece, 202-Eccentric impact ring, 203-Hydraulic impact channel, 204-Impact shell, 205-Limiting column, 206-Impact return spring, 207-Third limiting ring, 301-Second stationary roller, 302-Second bearing housing, 303-Second rolling column, 304-Fourth limiting ring, 305-Ball, 401-Connector, 402-Hydraulic channel, 403-Guide head, 404-Pressure relief valve, 405-Pressure relief port, 406-Return spring. Detailed Implementation

[0021] The solutions in 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 a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0022] Example: Refer to Figure 1-6 The present invention provides an embodiment of a multi-stage eccentric impact shaping device, comprising a first limiting component 1, an eccentric impact component 2, a second limiting component 3, and a connecting component 4 that can be sequentially connected together.

[0023] Reference Figure 1 From left to right, there is connector 401 for connecting to the top drive device. The first stationary roller 101 in the first limit assembly 1 and the second stationary roller 301 in the second assembly 2 are sandwiched between the eccentric impact assembly 2, which plays a limiting role during operation.

[0024] Reference Figure 1 and Figure 2 Ball bearings 305 are embedded in both the guide head 403 of the connecting component 4 and the second stationary roller 301 of the second limiting component 3. The outer diameter of the guide head 403 is different from that of the stationary roller 301. During the tool's descent, when it encounters resistance, the ball bearings 305 on the guide head 403 undergo the first round of rolling and shaping. Then, the ball bearings on the stationary roller 301 undergo the second round of shaping. Finally, they undergo eccentric impact shaping. This multi-stage shaping and repair improves the tool's efficiency and component utilization.

[0025] Reference Figure 2 and Figure 5On the left and right sides of the hydraulic flow channel 402 are limit components 1 and 302, respectively. Bearing housing 104 and 302 are installed on the hydraulic flow channel. Bearing housing 104 is fixed to limit ring 105 via limit inner ring 103, and bearing housing 302 is fixed to limit ring 304 via limit ring 207. All limit rings are fixed to the hydraulic flow channel 402 with screws. Several rolling pins 102 are installed on bearing housing 104, and several rolling pins 303 are installed on bearing housing 302. Stationary rollers 101 and 301 are fitted onto the rolling pins. This effectively improves the stability of the eccentric impact component 2 during rotation, ensuring that the impact piece 1 does not change when subjected to the reaction force of the deformed sleeve, thus improving operational stability.

[0026] Reference Figure 2 Figure 4 and Figure 6 The eccentric impact assembly 2 is installed in the middle of the hydraulic flow channel 402. A hydraulic impact channel 203 is opened on one side of the hydraulic flow channel, and a limit post 205 is installed on the other side. An impact return spring 206 is installed on the limit post 205. Both the limit post 205 and the hydraulic impact channel 203 pass through the eccentric impact ring 202. An impact shell 204 is installed outside the eccentric impact ring 202, and a replaceable impact piece 201 is installed outside the impact shell 204 and fixed with screws. During operation, liquid flows into the hydraulic impact channel 203, pushing the impact shell 204 to one side, and is limited by the limit post 205. When operation stops, the liquid drains out, and the eccentric impact assembly 2 returns to its original state under the action of the impact return spring 205.

[0027] Reference Figure 2 and Figure 3 The connecting assembly 4 consists of a connector 401, a hydraulic flow channel 402, and a guide head 403, which are connected to each other by threads from left to right. The pressure relief valve 404 is engaged between the guide head 403 and the hydraulic flow channel 402, and the return spring 406 is engaged in the guide head 403. When liquid flows into the hydraulic flow channel 402, the pressure relief valve 404 compresses the return spring 406 and moves downward, blocking the pressure relief port 405 and completing the pressure relief. When the operation stops, the pressure decreases, and under the action of the return spring 406, the pressure relief valve 404 moves upward, exposing the pressure relief port 405. Liquid flows through the pressure relief port 405 and flows out from between the guide head 403 and the pressure relief valve 404, completing the pressure relief.

[0028] Compared with existing technologies, the eccentric impact shaper of this invention generates a certain torque under the drive of the top drive device during shaping. Therefore, it generates both radial force and tangential force along the contact surface during shaping, resulting in a larger shaping force and a faster shaping process, reducing the shaping cycle. The novel eccentric impact component has a small volume when contracted and a large expansion range, making it suitable for different sizes of sleeves. The shaping range is also larger than that of traditional expansion shapers. Ball bearings are embedded in the second stationary roller on the guide head to achieve multi-stage shaping of the sleeve position, increasing the tool's functionality and utilization rate. In terms of manufacturing, the expansion plate of this invention is provided with rectangular protrusions. Based on the principle that the smaller the contact area, the greater the pressure, this method reduces the contact area with the sleeve position, thereby increasing the pressure. At the same time, the impact shell in the eccentric impact component is teardrop-shaped, which can be stuck when encountering a large sleeve position. The shaping process is also gradual, reducing the shaping difficulty.

[0029] This invention utilizes a top drive to rotate and complete the shaping process, allowing for shaping from any position on the sleeve. This eliminates the risk of expansion plate breakage due to uncertainty about the sleeve's azimuth angle, while also providing excellent repair results. The design of two stationary rollers enhances the stability of the eccentric impact assembly during rotation, ensuring that the impact plate does not skew or deform under the reaction force of the deformed sleeve, thus improving operational stability.

[0030] Working Principle: When the entire tool string is lowered to the casing deformation position, the tool encounters resistance. Under downward force, the ball bearing 305 on the guide head 403 contacts the casing deformation position for rolling and shaping. The ball bearing 305 on the second stationary roller 301 then contacts the casing deformation position again for rolling and shaping. If the tool still does not pass the casing deformation position, fluid is injected into the tool through the tubing from the wellhead. Under pressure, the pressure relief valve 404 moves downward, blocking the pressure relief port 405 and sealing the tool cavity. The fluid flows into the hydraulic impact channel 203, pushing the impact shell 204 to one side, where it is limited by the limiting post 205. At this point, driven by the top drive, the tool rotates, and the impact plate 201 collides with the deformed position, completing the shaping. During the shaping process, the eccentric impact assembly 2 may experience impact deformation under the influence of the casing deformation position. The first limiting assembly 1 and the second limiting assembly 2 support the eccentric impact assembly, making it more stable during operation. After the shaping is completed, the wellhead stops injecting liquid, the pressure inside the cavity decreases, and under the action of the reset spring 406, the pressure relief valve 404 moves upward, and the liquid flows through the pressure relief port 405 and flows out from between the guide head 403 and the pressure relief valve 404, completing the pressure relief. The eccentric impact assembly 2 is restored, and the operation ends.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and does not limit the present invention. Although the present invention has been described in detail with reference to the signed embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. At the same time, the number of components in this article is only for structural description. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage eccentric impact shaping device, comprising a first limiting component, an eccentric impact component, a second limiting component, and a connecting component: The first limiting component (1) includes: The first stationary roller (101), the first rolling column (102), the first limiting ring (103), the first bearing housing (104), and the second limiting ring (105) are arranged in a hydraulic flow channel (402). The first bearing housing (104) is inserted on the hydraulic flow channel (402). The axial position of the first and second limiting rings (103 and 105) is limited by the first limiting ring (103) and the second limiting ring (105) which are limited by screws. Several first rolling columns (102) are embedded on the first bearing housing (104). The first stationary roller (101) is nested outside the first rolling column (102). The eccentric impact assembly (2) includes: an impact piece (201), an eccentric impact ring (202), a hydraulic impact channel (203), an impact shell (204), a limiting post (205), an impact reset spring (206), and a third limiting ring (207); the impact piece (201) is fixed to the impact shell (204) by screws, and the impact shell (204) is nested on the eccentric impact ring (202). The eccentric impact ring (202) has an axially symmetrical limiting hole and a hydraulic impact channel (203) in the middle through hole, a limiting post (205) is installed in the limiting hole, and a reset spring (206) is installed on the limiting post (205); The second limiting component (3) includes: a second stationary roller (301), a second bearing seat (302), a second rolling column (303), a fourth limiting ring (304), and a ball (305); the second bearing seat (302) passes through the hydraulic flow channel (402), and the axial position on both sides is limited by the third limiting ring (207) and the fourth limiting ring (304) which are limited by screws; several second rolling columns (303) are embedded on the second bearing seat (302), the second stationary roller (301) is nested outside the second rolling column bearing (303), and the ball (305) is embedded outside the second stationary roller (301); The connecting assembly (4) includes: a connector (401), a hydraulic channel (402), a guide head (403), a pressure relief valve (404), a pressure relief port (405), and a return spring (406); one side of the hydraulic channel (402) is connected to the connector (401) by a thread, and the other side is connected to the guide head (403); the pressure relief valve (404) is locked between the guide head (403) and the hydraulic channel (402); the return spring (406) is locked in the guide head (403); and a ball bearing (305) is embedded in the guide head (403).

2. The multi-stage eccentric impact shaping device according to claim 2, characterized in that: The outermost part of the eccentric impact assembly has an impact piece (201) fixed to the impact shell (204) by screws. The outer side of the impact piece has a rectangular protrusion to increase the shaping force during shaping and improve the repair efficiency.

3. The multi-stage eccentric impact shaping device according to claim 3, characterized in that: The impact shell (204) in the eccentric impact assembly is teardrop-shaped.

4. A multi-stage eccentric impact shaping device according to claim 4, characterized in that: In both the first and second limit components, the first stationary roller (101) and the second stationary roller (301) are equipped with a first rolling column (102) and a second rolling column (303). When the tool rotates, the two sets of limit components can rotate with it and together with the first limit ring (103) and the third limit ring (207) play a limiting role.

5. A multi-stage eccentric impact shaping device according to claim 5, characterized in that: Several balls (305) are embedded on both the connector (401) and the second stationary roller (301). Since the outer diameters of the connector (401) and the second stationary roller (301) are different, this can be used for small diameter sleeve shaping to improve shaping efficiency.

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