Whipstock and method of deflecting

Abstract

The embodiment of the present application provides a whipstock and a steering method thereof. The whipstock comprises a setting device, a guide whipstock and a running-in member. One end of the setting device in the axial direction is provided with a first limiting part. The guide whipstock is located on one side of the setting device in the axial direction and is provided with a second limiting part. The running-in member is detachably connected to the guide whipstock from the side of the guide whipstock away from the setting device. The running-in member is configured to be able to pull the guide whipstock to switch between a locking position and an unlocking position along the axial direction of the setting device. In the locking position, the first limiting part and the second limiting part are limited to cooperate and limit the rotation of the guide whipstock around the axial direction of the setting device. In the unlocking position, the first limiting part is separated from the second limiting part, and the guide whipstock can rotate around the axial direction of the setting device. The technical scheme of the present application is used to improve the efficiency of well completion and development and reduce the cost.

Description

Technical Field

[0001] This application relates to the field of oil and gas well completion technology, and in particular to a directional device and its steering method. Background Technology

[0002] With technological advancements, drilling horizontal wells for coalbed methane extraction based on existing drilling methods has become widely adopted. Consequently, directional drilling rigs have become a crucial tool in this process.

[0003] The directional drilling rig is used to fix itself to the inner wall of the casing and guides the drilling window tool through the guide bevel. Currently, for operational scenarios requiring multi-directional drilling, such as those involving complex well networks or multiple reservoirs in the same well section, the directional drilling rig needs to be removed, reoriented, and then re-anchored. This repeated process affects development efficiency. Summary of the Invention

[0004] This application provides a directional device and its steering method to improve well completion and development efficiency and reduce costs.

[0005] In a first aspect, embodiments of this application provide a deflector, comprising:

[0006] The setting device has a first limiting part at one end in the axial direction;

[0007] A guide member, located on one side of the setting device along its axial direction, and provided with a second limiting part; and

[0008] The feed member is detachably connected to the guide member from the side of the guide member away from the setting device;

[0009] The feeding member is configured to pull the guide member to switch between a locked position and an unlocked position along the axial direction of the sealing device. In the locked position, the first limiting part and the second limiting part are engaged to limit the rotation of the guide member around the axial direction of the sealing device. In the unlocked position, the first limiting part and the second limiting part are disengaged, and the guide member can rotate around the axial direction of the sealing device.

[0010] In one possible implementation, the first limiting portion has a plurality of limiting grooves spaced apart circumferentially along the setting device, the openings of the limiting grooves facing the guide member, and the second limiting portion has a plurality of limiting protrusions.

[0011] In the locked position, one of the limiting protrusions is correspondingly inserted into one of the limiting grooves.

[0012] In one possible implementation, the first limiting portion includes a plurality of first limiting teeth arranged circumferentially along the sealing device, and the limiting groove is defined between two adjacent first limiting teeth. The second limiting portion includes a plurality of second limiting teeth, each of the second limiting teeth being formed as a limiting protrusion. In the locked position, the plurality of first limiting teeth engage with the plurality of second limiting teeth.

[0013] The first limiting tooth has a first guide surface at its tip, and the second limiting tooth has a second guide surface at its tip. The first guide surface and the second guide surface are used to slide in contact before the first limiting tooth and the second limiting tooth mesh.

[0014] In one possible implementation, the setting device includes:

[0015] The housing has mounting channels; and

[0016] A rotating fixing member is installed in the installation channel and has the first limiting part;

[0017] The guide member is inserted into the installation channel at one end near the setting device and has the second limiting part.

[0018] In one possible implementation, both the rotating fixing member and the guide member are sleeved on the feeding member, and the setting device further includes:

[0019] The rotating fixing pin includes a large-diameter portion and a small-diameter portion connected together. The large-diameter portion passes through the rotating fixing member radially along the setting device, and the small-diameter portion passes through the feeding member radially along the setting device.

[0020] In one possible implementation, the setting device further includes:

[0021] An anchoring assembly, installed in the mounting channel and located on the side of the rotating fixing member away from the guide member, includes a first slip and a second slip spaced axially along the setting device. The side wall of the housing is provided with a first setting opening and a second setting opening corresponding to the first slip and the second slip, respectively. Both the first setting opening and the second setting opening are connected to the mounting channel.

[0022] Both the first slip and the second slip have at least an anchoring position, wherein the first slip extends radially out of the first sealing opening of the sealing device, and the second slip extends radially out of the second sealing opening of the sealing device.

[0023] In one possible implementation, both the first slip and the second slip also have an unsealing position, and the anchoring assembly further includes:

[0024] The central tube is suspended within the mounting channel and extends axially along the setting device;

[0025] A first piston is slidably fitted onto one end of the central tube, and the outer diameter of the bottom of the first piston is larger than the outer diameter of the top of the first piston. A first slip is located outside the top of the first piston. In the unsealed position, the first piston and the first slip are connected by a first slip pin that passes radially through the sealing device.

[0026] The second piston is slidably sleeved on the other end of the central tube, and the outer diameter of the bottom of the second piston is larger than the outer diameter of the top of the second piston. The second slip is located outside the top of the second piston. In the unsealing position, the second piston and the second slip are connected by a second slip pin that passes through the radial direction of the sealing device.

[0027] The outer wall of the central tube, the bottom of the first piston, the bottom of the second piston, and the inner wall of the outer shell together define an annular cavity. The central tube has a central channel and a side channel connecting the central channel and the annular cavity. The central channel is connected to the feeding channel of the feeding member. The first piston and the second piston can be pushed by the fluid entering the annular cavity to slide opposite each other along the axial direction of the setting device, shearing the first slip pin and the second slip pin, and pushing the first slip and the second slip from the unsealing position to the anchoring position.

[0028] In one possible implementation, the anchoring component further includes:

[0029] A first elastic component, connecting the first slip and the outer shell, has a tendency to hold the first slip in the unsealed position; and

[0030] A second elastic component, connecting the second slip and the outer casing, has a tendency to hold the second slip in the unsealed position;

[0031] Specifically, based on the fluid outflow within the annular cavity, the first slip and the second slip switch from the anchoring position to the unsealing position at least respectively under the action of the first elastic component and the second elastic component.

[0032] In one possible implementation, the setting device further includes:

[0033] The lower plug is connected to the end of the outer casing away from the feed member;

[0034] The positioning assembly, located inside the lower plug, includes a limiting ring and a retaining ring. The limiting ring is connected to the top end of the second piston. The limiting ring can move within the lower plug along the axial direction of the setting device. The limiting ring defines a receiving groove inside and has a connecting hole in the side wall that communicates with the receiving groove. The retaining ring is located in the receiving groove and partially elastically extends out of the connecting hole.

[0035] The inner wall of the lower plug is provided with multiple check teeth arranged along the axial direction of the setting device. The portion of the retaining ring that protrudes from the connecting hole engages with the check teeth to prevent the retaining ring from moving closer to the central tube along the axial direction of the setting device.

[0036] In one possible implementation, the second piston includes:

[0037] The piston body is sleeved on the central tube and can rotate around the central tube to have a working position and a retraction position, and the piston body has a first piston chamber communicating with the central channel;

[0038] A drainage section, connected to the piston body, and rotatably inserted through the limiting ring along the axial direction of the setting device, includes a drainage channel that communicates with the first piston chamber via a connecting port. The inner diameter of the drainage channel is smaller than the inner diameter of the first piston chamber.

[0039] A baffle plate is connected to the end of the piston body away from the drainage part and is located inside the annular cavity;

[0040] The setting device further includes a sealing ball, which is configured to be dissolved by a set fluid. In the working position, the sealing ball is inserted into the first piston chamber to block the communication port. The fluid entering the central channel enters the annular cavity through the side flow channel, driving the piston body and the first piston to move, and driving the first slip and the second slip to switch from the unsealing position to the anchoring position.

[0041] The sealing ball is at least partially dissolved and falls into the drainage channel, the fluid in the annular cavity flows out into the drainage channel, and the piston body is switched to the recovery position, the baffle isolates the side flow channel from the annular cavity;

[0042] The drainage part also has a liquid guiding hole, and the limiting ring has a liquid guiding channel. Based on the piston body being switched to the recovery position, the liquid guiding hole is connected to the liquid guiding channel, and the liquid guiding channel is connected to the outside of the retaining ring in the receiving groove. The fluid pushes the retaining ring to retract and space it from the check tooth. The first slip and the second slip are switched from the anchoring position to the unsealing position at least respectively under the action of the first elastic component and the second elastic component.

[0043] In one possible implementation, the setting device further includes:

[0044] The nozzle has one end fitted by the rotating fixing member and the other end fitted by the first piston. A connecting channel is provided inside the nozzle. One end of the feeding member passes through the connecting channel, and the feeding member has a feeding channel. The connecting channel connects the feeding channel and the central channel.

[0045] The rotating retaining pin includes a large-diameter portion and a small-diameter portion connected together. The large-diameter portion passes through the rotating retaining member and the nozzle in the radial direction of the setting device, and the small-diameter portion passes through the nozzle and the feeding member in the radial direction of the setting device.

[0046] Secondly, embodiments of this application provide a steering method for a ramp, used for a ramp as described in any of the above claims, comprising:

[0047] The guide member is switched from the locked position to the unlocked position by being pulled by the feeding member;

[0048] The feeder is rotated by a preset angle around the axis of the setting device, and the guide member is simultaneously rotated by a preset angle around the axis of the setting device.

[0049] The guide member is pulled from the unlocked position to the locked position by the feeding member.

[0050] The technical solution of this application embodiment separates the setting device and the guide member, and guides the guide member to switch between a locked position and an unlocked position via a feeder. When locked, the guide member engages with the setting device for limiting movement; when unlocked, the feeder pulls the guide member to rotate and returns it to the locked position. Thus, the rotation of the guide member enables the turning operation of the slant, allowing the milling tool to perform side drilling in a direction different from its previous direction under the guidance of the slant. Compared to the prior art, which involves lifting the entire slant for turning and then anchoring it, the technical solution of this application eliminates the need to lift the setting device during slant turning; the feeder directly drives the guide member. This not only avoids the time wasted on repeatedly lifting and re-anchoring the slant, but also allows for slant turning without removing the tool, simplifying operation and improving development efficiency.

[0051] In addition, since there is no need to frequently use tools to repeatedly pull out and anchor, it can reduce the wear and tear on construction tools and the damage to the casing structure, which helps to maintain the stability of oil and gas wells and ensure the anchoring stability of the setting device, and can also save time and maintenance costs. Attached Figure Description

[0052] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0053] Figure 1 A schematic diagram of the overall structure of the directional device provided in this application;

[0054] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the central inclined plate at section AA;

[0055] Figure 3 This is a schematic diagram of the structure of the first limiting part and the second limiting part in the locked position of this application;

[0056] Figure 4 This is a schematic diagram of the structure of the first and second limiting parts in the unlocked position of this application;

[0057] Figure 5 for Figure 2 Enlarged structural diagram at point B;

[0058] Figure 6 for Figure 1 A schematic diagram of the cross-sectional structure of the central inclined plate at section AA in another stage;

[0059] Figure 7 for Figure 2 Enlarged structural diagram at point C;

[0060] Figure 8 for Figure 6 Enlarged structural diagram at point D;

[0061] Figure 9 for Figure 2 Enlarged structural diagram at point E;

[0062] Figure 10 for Figure 6 A magnified structural diagram at point F in the middle.

[0063] Explanation of reference numerals in the attached figures:

[0064] 100- Incliner; 10- Incliner guide; 11- Incliner surface; 12- Second limiting part; 121- Limiting protrusion; 122- Second limiting tooth; 123- Second guide surface; 20- Sealing ball; 30- Sealing device; 31- Outer shell; 311- First sealing opening; 312- Second sealing opening; 32- Rotating fixing part; 321- First limiting part; 322- First limiting tooth; 323- Limiting groove; 324- First guide surface; 33- Rotating fixing pin; 331- Large diameter part; 332- Small diameter part; 34- Center tube; 341- Center channel; 342- Side flow channel; 35-First piston; 36-First slip; 361-First slip pin; 37-Second piston; 371-Piston body; 372-Drainage section; 373-Baffle; 38-Second slip; 381-Second slip pin; 39-Annular cavity; 40-Lower plug; 41-Check valve tooth; 42-Limiting ring; 421-Receiving groove; 422-Liquid guiding channel; 43-Snap ring; 44-Snap ring spring; 50-Infeed component; 51-Infeed rod; 511-Infeed channel; 52-Upper connector; 60-Nozzle; 61-Connecting channel; 70-First elastic component; 80-Second elastic component; 90-Straightening disc.

[0065] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0066] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0067] Directional guides are primarily used in the field of downhole tools for oil and gas wells, specifically for scenarios such as old well development, directional drilling, and multi-reservoir sidetracking. Specifically, the directional guide is fixed to the inner wall of the casing and uses a guide surface to guide the sidetracking tool.

[0068] In related technologies, the directional drilling device is anchored to the inner wall of the casing by slips. For operation scenarios that require multi-directional side-drilling, such as forming complex well networks or having multiple reservoirs in the same well section, the directional drilling device needs to be released from its anchored state, removed, reoriented, and then anchored again.

[0069] As can be seen from the above description, in the existing technology, the method of repeatedly raising and anchoring the directional drilling tool for multi-directional side drilling operations has technical problems that affect development efficiency.

[0070] To address the aforementioned technical issues, the directional drilling rig provided in this application employs a separate design for the anchoring device and the guide component for guiding the window-opening tool. After a single horizontal side-drilling operation, the guide component is disengaged from the anchoring device and turned, and then the guide component is repositioned and engaged with the anchoring device to achieve the directional drilling rig's turning. This solves the technical problem in related technologies where the directional drilling rig's direction is fixed, making it impossible to directly adjust the guide angle downhole, thus limiting the efficiency of multi-directional development.

[0071] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0072] like Figures 1 to 4 As shown, in some embodiments of this application, the slant 100 includes a setting device 30, a slant guide 10, and a feed member 50. The feed member 50 is used to feed the setting device 30, together with the slant guide, into a designated position within the casing. The setting device 30 is anchored to the inner wall of the casing, providing a structural foundation for the installation of the slant guide 10. The slant guide 10 is mounted on the setting device 30 and has a guide surface 11 for guiding the milling tool. After being guided by the guide surface 11, the milling tool changes its running direction, opening a window from the side of the casing to achieve side drilling.

[0073] like Figure 2 As shown, the setting device 30 is generally cylindrical, and thus has an axis Z extending in the left-right direction shown in the figure, and an axial direction extending in the direction of axis Z. Correspondingly, the setting device 30 also has a circumferential direction about the axis Z. Exemplarily, the setting device 30 can be anchored to the inner wall of the sleeve by a slip extending radially on the circumferential sidewall.

[0074] The guide member 10 is located on one side of the setting device 30 along its axial direction. Along its own axial direction, the setting device 30 has a first limiting part 321 near the end of the guide member 10, and correspondingly, the guide member 10 has a second limiting part 12. Since the guide member 10 and the setting device 30 are separately configured in this embodiment, the guide member 10 has a locked position and an unlocked position. In the locked position, the guide member 10 is mounted on the setting device 30, and the first limiting part 321 and the second limiting part 12 are connected to each other, thereby restricting the rotation of the guide member 10 around the axial direction of the setting device 30. Furthermore, the setting device 30 itself restricts the movement of the guide member 10 along its axial direction, ensuring the stability of the guide member 10 and thus ensuring that the guide member 10 can accurately and stably guide the milling tool for side drilling. In the unlocked position, the first limiting part 321 disengages from the second limiting part 12, and in this position, the setting device 30 does not restrict the rotation of the guide member 10 around its axial direction.

[0075] The feeder 50 is detachably connected to the guide 10 on the side of the guide 10 away from the setting device 30. For example, the feeder 50 and the guide 10 can be detachably connected by means of threaded connection, snap-fit ​​connection, etc. After the feeder 50 is connected to the guide 10, the feeder 50 can be controlled to pull the guide 10 to move. For example, by pulling or pushing the feeder 50 in the sleeve, the feeder 50 can pull the guide 10 away from or towards the setting device 30, thereby switching between the locked position and the unlocked position; or, for example, by rotating the feeder 50, the feeder 50 can pull the guide 10 to rotate around the setting device 30 axially.

[0076] Specifically, based on the above description and actual operating scenarios, the operation of the directional device 100 in this application embodiment may include an anchoring and setting stage and a turning stage.

[0077] During the anchoring and setting stage, the setting device 30 and the guide member 10 that is matched with the setting device 30 are first delivered to the designated position using the feeder 50, so that the setting device 30 is anchored to the inner wall of the casing. For example, in a well where the casing extends in the vertical direction, the axis of the setting device 30 is approximately coincident with the vertical direction.

[0078] After the anchoring and setting stage, to facilitate the operation of the milling tool, with the guide 10 in the locked position, the feed piece 50 is removed from the guide 10. After one side drilling operation is completed, the milling tool is removed, and the feed piece 50 is reconnected to the guide 10 to prepare for the turning stage.

[0079] During the steering phase, the steering operation of the steerer 100 is performed through the following steps:

[0080] The feeder 50 guides the inclined piece 10 from the locked position to the unlocked position;

[0081] The feed piece 50 is rotated by a preset angle around the axial direction of the setting device 30, and the guide piece 10 is simultaneously rotated by a preset angle around the axial direction of the setting device 30.

[0082] The guide piece 10 is switched from the unlocked position to the locked position by the feed piece 50.

[0083] Understandably, after the transition phase,

[0084] Thus, the technical solution of this application embodiment sets the setting device 30 and the guide 10 separately, and guides the guide 10 to switch between the locked position and the unlocked position by the feeding member 50. When the guide 10 is in the locked position, it is limited and cooperates with the setting device 30. When the guide 10 is in the unlocked position, the feeding member 50 can pull the guide 10 to rotate and pull the guide 10 back to the locked position. Thus, the rotation of the guide 10 realizes the turning operation of the slant 100. Under the guidance of the slant 100, the milling tool can perform side drilling in a direction different from the direction before turning. Compared to the existing technology that involves lifting the entire swashplate 100 for steering before anchoring, the technical solution of this application eliminates the need to lift the setting device 30 when steering the swashplate 100. Instead, the guide member 10 can be driven directly by the feeder 50. This not only avoids the waste of time by repeatedly lifting and anchoring the swashplate 100, but also eliminates the need for lifting tools, making the operation simple, convenient, and significantly improving development efficiency.

[0085] In addition, since there is no need to frequently use tools to repeatedly pull out and anchor, it can reduce the wear and tear on construction tools and the damage to the casing structure, which is conducive to maintaining the stability of oil and gas wells and ensuring the anchoring stability of the setting device 30, and can also save time and maintenance costs.

[0086] Combination Figure 3 and Figure 4 In some possible embodiments, the first limiting part 321 has a plurality of limiting grooves 323 spaced apart circumferentially along the setting device 30, with the openings of the limiting grooves 323 facing the guide member 10. The second limiting part 12 has a plurality of limiting protrusions 121. In the locked position, a limiting protrusion 121 is inserted into a corresponding limiting groove 323. In this way, the two opposing side walls of the limiting grooves 323 along the circumferential direction of the setting device 30 can restrict the movement of the limiting protrusions 121, thereby the first limiting part 321 can restrict the rotation of the second limiting part 12 about the axial direction of the setting device 30. As the guide member 10 moves away from the setting device 30, the limiting protrusions 121 can disengage from the openings of the limiting grooves 323, and the guide member 10 switches to the unlocked position.

[0087] Of course, the first limiting part 321 may have multiple limiting grooves 323, and the second limiting part 12 may have multiple limiting protrusions 121. This application embodiment does not limit this.

[0088] The multiple limiting grooves 323 and the multiple limiting protrusions 121 are all roughly the same in shape, ensuring that after the guide member 10 rotates at a certain angle, the multiple limiting protrusions 121 always correspond one-to-one with the multiple limiting grooves 323, thus ensuring the limiting engagement between the guide member 10 and the setting device 30 in the locked position. In this embodiment, the limiting protrusions 121 are inserted into the limiting grooves 323, ensuring that the rotation of the guide member 10 in the locked position is effectively limited, while also making the engagement of the first limiting part 321 and the second limiting part 12 simple and easy to operate, facilitating the turning operation of the guide member 10.

[0089] Understandably, along the circumference of the setting device 30, the central angle occupied by the arc length between two adjacent limiting grooves 323 represents the minimum angle that the guide 10 can adjust in one turn. The smaller the central angle occupied by the arc length between two adjacent limiting grooves 323, i.e., the more limiting grooves 323 there are, the smaller the minimum angle that the guide 10 can adjust in one turn; conversely, the larger the central angle occupied by the arc length between two adjacent limiting grooves 323, i.e., the fewer limiting grooves 323 there are, the larger the minimum angle that the guide 10 can adjust in one turn. Depending on the number of limiting grooves 323 and limiting protrusions 121, the steerer 100 can be configured in various different specifications, each corresponding to a different minimum adjustable angle, thus making it suitable for different operating scenarios.

[0090] like Figure 3 and Figure 4 As shown, in one specific embodiment, the first limiting portion 321 includes a plurality of first limiting teeth 322 arranged circumferentially along the setting device 30, and a limiting groove 323 is defined between two adjacent first limiting teeth 322. The second limiting portion 12 includes a plurality of second limiting teeth 122, each second limiting tooth 122 being formed as a limiting protrusion 121. Both the first limiting teeth 322 and the second limiting teeth 122 extend axially along the setting device 30. In the locked position, the plurality of first limiting teeth 322 engage with the plurality of second limiting teeth 122, thereby ensuring the stability of the guide member 10 in the locked position.

[0091] Furthermore, a first guide surface 324 is provided on the tip of the first limiting tooth 322, and a second guide surface 123 is provided on the tip of the second limiting tooth 122. The first guide surface 324 and the second guide surface 123 are used for sliding contact before the first limiting tooth 322 and the second limiting tooth 122 engage. For example, in the illustrated embodiment, the first guide surface 324 is an inclined plane, and the second guide surface 123 is also an inclined plane. During the process of the guide member 10 approaching the sealing device 30, if the position of the limiting protrusion 121 and the limiting groove 323 are not aligned, the first guide surface 324 and the second guide surface 123 slide into contact, and as the guide member 10 continues to approach the sealing device 30, the guiding limiting protrusion 121 is inserted into the limiting groove 323, thereby causing the multiple first limiting teeth 322 to engage with the multiple second limiting teeth 122. Of course, during the process of the limiting protrusion 121 disengaging from the limiting groove 323, the inclined first guide surface 324 and second guide surface 123 can also prevent the first limiting tooth 322 and the second limiting tooth 122 from getting stuck, ensuring the smoothness of the disengagement process.

[0092] Furthermore, the first limiting tooth 322 has a first guide surface 324 on both sides of the tooth tip, so that the opening of the limiting groove 323 is flared. This not only makes the engagement and disengagement of the first limiting tooth 322 and the second limiting tooth 122 smoother, but also improves the compatibility of multiple first limiting teeth 322 and multiple second limiting teeth 122 rotating in both counterclockwise and clockwise directions, and improves the flexibility of the angle adjustment of the guide member 10.

[0093] In other possible embodiments of this application, the first limiting part 321 and the second limiting part 12 may also adopt other effective limiting and cooperating methods. For example, the first limiting part 321 and the second limiting part 12 may be limited by magnetic adsorption to maintain the locked position of the guide member 10. The magnetic force between the first limiting part 321 and the second limiting part 12 may be overcome by the feeding member 50, so that the first limiting part 321 and the second limiting part 12 may be disengaged, and the guide member 10 may be switched to the unlocked position. Further details are omitted here.

[0094] Combination Figure 2 and Figure 6 In some embodiments, the setting device 30 includes a housing 31 and a rotating fixing member 32. The housing 31 is elongated cylindrical, with an internal enclosure forming an installation channel. The axis of the installation channel is parallel to or coincides with the axis of the setting device 30. The rotating fixing member 32 is installed within the installation channel and is positioned near one end of the housing 31. The rotating fixing member 32 has a first limiting portion 321, and the guide member 10, with one end near the setting device 30, passes through the installation channel and has a second limiting portion 12.

[0095] Specifically, the guide member 10 includes a connected guide body and the aforementioned second limiting part 12. The guide body is provided with a guide surface 11, and the second limiting part 12 is provided at one end of the guide body near the setting device 30. Optionally, the guide surface 11 is an arc surface to improve the guiding effect on the milling tool. The second limiting part 12 passes through the mounting channel, which restricts the travel direction of the second limiting part 12, facilitating the alignment operation between the second limiting part 12 and the first limiting part 321, and also improves the stability of the guide body.

[0096] Optionally, the rotating fastener 32 can be installed inside the housing 31 by means of a threaded connection, which not only provides high connection stability but also facilitates the assembly of the slanter 100.

[0097] In one embodiment, both the rotating fixing member 32 and the guide member 10 are sleeved on the feeding member 50. Optionally, at least a portion of the structure of the feeding member 50 is generally rod-shaped, and the feeding member 50 and the guide member 10 are connected by threads. This not only ensures a stable connection between the feeding member 50 and the guide member 10, but also allows the feeding member 50 to be disengaged from the guide member 10 by rotating it, facilitating the assembly and disassembly of the feeding member 50. The setting device 30 also includes a rotating fixing pin 33, which is used to fix the rotating fixing member 32 and the feeding member 50, thereby fixing the feeding member 50 to the setting device 30, enabling the feeding member 50 to reliably and stably feed the setting device 30 into the designated position. Figure 2 as well as Figure 5 The rotating retaining pin 33 includes a large-diameter portion 331 and a small-diameter portion 332 connected together. Understandably, the outer diameter of the large-diameter portion 331 is larger than the outer diameter of the small-diameter portion 332. The large-diameter portion 331 passes radially through the rotating retaining member 32 along the setting device 30, and the small-diameter portion 332 passes radially through the feeding member 50 along the setting device 30. After the anchoring and setting stage, when the feeding member 50 is withdrawn, the rotating retaining pin 33 is subjected to shear stress, and the small-diameter portion 332 breaks before the large-diameter portion 331, facilitating the removal of the feeding member 50.

[0098] It is worth mentioning that the tilting device 100 also includes a straightening plate 90 and a straightening plate pin. Before the feeder 50 is removed, the straightening plate 90 is sleeved outside the feeder 50. The straightening plate 90 is connected to the end of the guide tilting member 10 away from the setting device 30 by the straightening plate pin, thus ensuring the stability of the guide tilting member 10 during the process of the feeder 50 feeding the setting device 30 and the guide tilting member 10 into the designated position. Of course, when the feeder 50 is pulled out, the straightening plate pin breaks under shear force, releasing the constraint between the guide tilting member 10 and the feeder 50.

[0099] Combination Figure 1 and Figure 2In some embodiments, the setting device 30 further includes an anchoring assembly. The anchoring assembly is installed within the mounting channel and located on the side of the rotating fixing member 32 away from the guide member 10. The anchoring assembly interacts with the inner wall of the sleeve to anchor the setting device 30. The anchoring assembly includes a first slip 36 and a second slip 38 spaced axially along the setting device 30. The sidewall of the housing 31 has a first setting opening 311 and a second setting opening 312 corresponding to the first slip 36 and the second slip 38, respectively. Both the first setting opening 311 and the second setting opening 312 communicate with the mounting channel. Each of the first slip 36 and the second slip 38 has at least an anchoring position. In the anchoring position, the first slip 36 extends radially out of the first setting opening 311, and the second slip 38 extends radially out of the second setting opening 312. The first slip 36 protrudes from the first sealing opening 311 and abuts against the inner wall of the sleeve, while the second slip 38 protrudes from the second sealing opening 312 and abuts against the inner wall of the sleeve. In this embodiment, the stability and reliability of the sealing device 30 can be improved by using the first slip 36 and the second slip 38.

[0100] Furthermore, the anchoring assembly includes multiple first slips 36 and multiple second slips 38. The multiple first slips 36 are arranged at intervals along the circumference of the setting device 30, and the multiple second slips 38 are arranged at intervals along the circumference of the setting device 30. For example, the number of first slips 36 and second slips 38 can be three, four, etc. By setting multiple first slips 36 and multiple second slips 38, the number of points of force of the setting device 30 on the inner wall of the casing can be increased, and the contact area between the setting device 30 and the inner wall of the casing can be increased, thereby further improving the stability of the setting device 30 in the anchored state. At the same time, multiple first slips 36 and multiple second slips 38 can also improve the ability of the setting device 30 to cope with complex working conditions where there are local unevenness or tilt of the well wall, and improve the compatibility and reliability of the setting device 30.

[0101] In some embodiments, both the first slip 36 and the second slip 38 also have an unsealed position, and the first slip 36 and the second slip 38 are movable from the unsealed position to the anchored position. The anchoring assembly also includes a central tube 34, a first piston 35, and a second piston 37. The central tube 34 is suspended within the mounting channel and extends axially along the setting device 30. The first piston 35 is slidably fitted onto one end of the central tube 34, and the outer diameter of the bottom of the first piston 35 is larger than the outer diameter of the top of the first piston 35. The second piston 37 is slidably fitted onto the other end of the central tube 34, and the outer diameter of the bottom of the second piston 37 is larger than the outer diameter of the top of the second piston 37. It should be noted that the bottom of the first piston 35 refers to the end of the first piston 35 through which the central tube 34 passes, and correspondingly, the top of the first piston 35 refers to the other end away from the bottom. Similarly, the bottom of the second piston 37 refers to the end of the second piston 37 through which the central tube 34 passes, and correspondingly, the top of the second piston 37 refers to the other end away from the bottom. Figure 2 and Figure 6 As shown, the bottom of the first piston 35 refers to the left end of the first piston 35 along the left-right direction shown in the figure, and the top refers to the right end of the first piston 35 along the left-right direction shown in the figure. The bottom of the second piston 37 refers to the right end of the second piston 37 along the left-right direction shown in the figure, and the top refers to the left end of the second piston 37 along the left-right direction shown in the figure.

[0102] The outer diameters of the first piston 35 and the second piston 37 gradually increase from bottom to top. Because the outer diameters of the tops of the first piston 35 and the second piston 37 are relatively small, there is a gap between the tops of the first piston 35 and the tops of the second piston 37 and the outer casing 31. The first slip 36 is located outside the top of the first piston 35. In the unsealed position, the first piston 35 and the first slip 36 are connected by a first slip pin 361 that passes radially through the setting device 30. The second slip 38 is located outside the top of the second piston 37. In the unsealed position, the second piston 37 and the second slip 38 are connected by a second slip pin 381 that passes radially through the setting device 30.

[0103] In this application, the outer wall of the central tube 34, the bottom of the first piston 35, the bottom of the second piston 37, and the inner wall of the outer casing 31 together define the annular cavity 39. The central tube 34 is provided with a central channel 341, and the side wall has a side flow channel 342 that connects the central channel 341 and the annular cavity 39. An infeeding channel 511 extending axially along the setting device 30 is formed in the feed member 50, and the feeding channel 511 communicates with the central channel 341. Fluid can enter the annular cavity 39 through the feeding channel 511, the central channel 341, and the side flow channel 342. The first piston 35 and the second piston 37 can be pushed by the fluid entering the annular cavity 39 to slide opposite each other along the axial direction of the setting device 30, shearing the first slip pin 361 and the second slip pin 381, and pushing the first slip 36 and the second slip 38 from the unsealed position to the anchored position.

[0104] For example, in Figure 2 In the illustrated embodiment, during the anchoring and setting stage, after the feeder 50 delivers the setting device 30 along with the guide member 10 to the designated position, both the first slip 36 and the second slip 38 are in the unsealed position. Fluid, which can be liquid, is introduced into the annular cavity 39 through the feeder 50. The fluid entering the annular cavity 39 drives the first piston 35 to move to the right in the left-right direction shown in the figure, and the second piston 37 to move to the left in the left-right direction shown in the figure. As the first piston 35 and the second piston 37 move, the first slip 36 and the second slip 38 are compressed and radially extend out of the first setting port 311 and the second setting port 312.

[0105] In this embodiment, the first slip 36 and the second slip 38 are driven from the unsealing position to the anchoring position by fluid pressure, and the first slip 36 and the second slip 38 move simultaneously. Since the first piston 35 and the second piston 37 move in opposite directions, the first slip 36 and the second slip 38 extend in different directions when expanding, achieving symmetrical expansion about a plane perpendicular to the axial direction of the setting device 30, effectively dispersing the force, improving anchoring stability and anchoring success rate.

[0106] Combination Figure 2 and Figure 6In one possible implementation, the setting device 30 further includes a nozzle 60. One end of the nozzle 60 is fitted with a rotating retainer 32, and the other end is movably fitted with a first piston 35. Optionally, a rotating retaining pin 33 also passes through the nozzle 60, with a large-diameter portion 331 passing radially through the rotating retainer 32 and the nozzle 60, and a small-diameter portion 332 passing radially through the nozzle 60 and the feeder 50. Thus, the rotating retaining pin 33 secures the rotating retainer 32, the nozzle 60, and the feeder 50. When the feeder 50 is disengaged, the small-diameter portion 332 at the connection between the feeder 50 and the nozzle 60 breaks, causing the feeder 50 to detach from the nozzle 60, while the nozzle 60 and the rotating retainer 32 maintain their connection through the large-diameter portion 331. A connecting channel 61 is provided inside the nozzle 60, and one end of the feeder 50 passes through the connecting channel 61. The connecting channel 61 is provided with a limiting step, and the end face of the feeder 50 abuts against the limiting step. Alternatively, the setting device 30 may also include a gasket disposed between the cross-section of the feeder 50 and the limiting step to prevent structural damage.

[0107] The connecting channel 61 passes through the first piston 35 and connects to the central channel 341. The connecting channel 61 is also connected to the feed channel 511, so that fluid can enter the central channel 341 along the feed channel 511 and the connecting channel 61.

[0108] It should be noted that a sealing ring is provided between the first piston 35 and the nozzle 60 to prevent fluid leakage and ensure the driving effect of the fluid. Of course, sealing rings are also provided on the outer side of the first piston 35 and the inner side of the outer shell 31, and sealing rings are also provided on the outer side of the second piston 37 and the inner side of the outer shell 31, thereby improving the airtightness of the annular cavity 39 and effectively ensuring the effect of the fluid.

[0109] It is worth mentioning that the top of the first piston 35 is fitted onto the nozzle 60, and the bottom is fitted onto the central tube 34. During the movement of the first piston 35, it always maintains contact with the central tube 34 and the nozzle 60, improving the stability of its movement and enabling it to stably provide pressure to the first slip 36. Similarly, the second piston 37 is fitted onto the central tube 34, ensuring that both the first piston 35 and the second piston 37 move along the central tube 34, improving the alignment of their movements and facilitating the simultaneous driving of the first slip 36 and the second slip 38.

[0110] Combination Figure 2 , Figure 7 as well as Figure 8In one embodiment, the setting device 30 further includes a lower plug 40 and a locking assembly. The lower plug 40 is connected to the end of the housing 31 away from the feed member 50. The locking assembly is disposed inside the lower plug 40 and includes a limiting ring 42 and a retaining ring 43. The limiting ring 42 is connected to the top end of the second piston 37 and is movable within the lower plug 40 along the axial direction of the setting device 30. The limiting ring 42 defines a receiving groove 421 inside, and its sidewall has a communicating hole communicating with the receiving groove 421. The retaining ring 43 is disposed within the receiving groove 421 and partially elastically extends out of the communicating hole. For example, the locking assembly also includes a retaining ring spring 44, under the action of the retaining ring spring 44, the retaining ring 43 elastically extends out of the communicating hole.

[0111] The inner wall of the lower plug 40 is provided with multiple check teeth 41 arranged axially along the setting device 30. The portion of the retaining ring 43 protruding from the connecting hole engages with the check teeth 41 to limit the movement of the limiting ring 42 towards the central tube 34 along the axial direction of the setting device 30. The tooth profile of the check teeth 41 is asymmetrical. For example, combined with... Figure 7 and Figure 8 The check teeth 41 include a plane perpendicular to the axial direction of the setting device 30 and an inclined slope. When the second piston 37 is pushed away from the central tube 34 by the fluid, it pushes the limiting ring 42 to move. The retaining ring 43 moves along the inclined slope, and when it moves to the plane, the retaining ring 43 extends between the two check teeth 41 under the action of the retaining ring spring 44. The plane of the check teeth 41 restricts the return of the retaining ring 43 to the right, thereby restricting the movement of the second piston 37 connected to the limiting ring 42 closer to the central tube 34, which helps to maintain the position of the first piston 35 and the second piston 37, and maintain the stability of the first slip 36 and the second slip 38.

[0112] Furthermore, combined Figures 7 to 10 In one embodiment, the second piston 37 includes a piston body 371, a drain portion 372, and a baffle 373. The piston body 371 is sleeved on the central tube 34 and can rotate around the central tube 34 to have a working position and a retraction position, and the piston body 371 has a first piston chamber communicating with the central channel 341. The drain portion 372 is connected to the piston body 371 and is rotatably inserted through the limiting ring 42 along the axial direction of the setting device 30. The drain portion 372 has a drain channel, which communicates with the first piston chamber through a connecting port. The inner diameter of the drain channel is smaller than the inner diameter of the first piston chamber. The baffle 373 is connected to the end of the piston body 371 opposite to the drain portion 372 and is located in the ring cavity 39.

[0113] In the anchoring and setting stage, the setting device 30 also includes a sealing ball 20, which is configured to be dissolved by a set fluid. For example, the sealing ball 20 can be dissolved by liquid poured into the setting device 30. In this stage, the piston body 371 is initially in the working position. In the working position, the sealing ball 20 is inserted into the first piston chamber, sealing the communication port. Understandably, the ball can be inserted during the assembly of the inclined device 100 or through the feed channel 511. The fluid entering the central channel 341 is blocked by the ball and enters the annular cavity 39 through the side channel 342, driving the piston body 371 and the first piston 35 to move, and driving the first slip 36 and the second slip 38 to switch from the unsealing position to the anchoring position, thereby anchoring the setting device 30.

[0114] Combination Figure 8 and Figure 10 The operation of the directional drilling tool 100 according to this embodiment also includes a recovery phase. The sealing ball 20 is at least partially dissolved, its volume decreases, and it falls into the drainage channel. By controlling the rate at which the sealing ball 20 is dissolved, the time from the injection of fluid to the recovery phase can be controlled for side-drilling operations. The sealing ball 20 falls into the drainage channel, and the fluid in the annular cavity 39 flows out into the drainage channel. The piston body 371 can be rotated from the working position to the recovery position using a recovery tool. Based on the piston body 371 being switched to the recovery position, the baffle 373 isolates the side flow channel 342 from the annular cavity 39. For example, the working position and the recovery position of the piston body 371 are 90° apart. In the working position, the baffle 373 and the opening of the side flow channel 342 are 90° apart in the circumferential direction of the central tube 34, while when switching to the recovery position, the baffle 373 precisely blocks the side flow channel 342. Of course, the angle between the working position and the recovery position can also be 60°, 80°, etc., and this embodiment does not limit this.

[0115] The drainage section 372 also has a liquid guiding hole, and the limiting ring 42 has a liquid guiding channel 422. When the piston body 371 is switched to the recovery position, the liquid guiding hole connects to the liquid guiding channel 422. Understandably, the angle between the liquid guiding hole and the opening of the liquid guiding channel 422 is also the angle between the working position and the recovery position of the piston body 371. Thus, when the piston body 371 switches from the working position to the recovery position, the liquid guiding hole connects precisely to the liquid guiding channel 422. The liquid guiding channel 422 connects to the outer side of the retaining ring 43 inside the receiving groove 421. The middle portion of the retaining ring 43 extends out of the limiting ring 42 through the connecting hole. At least a portion of the retaining ring 43 along the left-right direction shown in the figure is limited by the inner wall of the limiting ring 42. The other opening of the liquid guiding channel 422 faces the portion of the retaining ring 43 limited by the inner wall of the limiting ring 42. Thus... Under fluid pressure, the fluid pushes the retaining ring 43 to retract and separate it from the check tooth 41, thereby releasing the check tooth 41 from limiting the locking assembly and the second piston 37.

[0116] Understandably, during the recovery phase, the limit of the second piston 37 is released as described above. As the fluid in the annular cavity 39 flows out, the fluid pressure cannot maintain the driving force on the first piston 35 and the second piston 37. As a result, the first piston 35 and the second piston 37 cannot maintain the pushing force on the first slip 36 and the second slip 38. The first slip 36 and the second slip 38 retract under the action of the soil layer, and react on the first piston 35 and the second piston 37, so that they are reset, thereby facilitating recovery.

[0117] Furthermore, in one possible implementation, the anchoring assembly further includes a first elastic component 70 and a second elastic component 80. The first elastic component 70 connects the first slip 36 and the outer shell 31, and has a tendency to hold the first slip 36 in the unsealed position. The second elastic component 80 connects the second slip 38 and the outer shell 31, and has a tendency to hold the second slip 38 in the unsealed position. Based on the fluid outflow within the annular cavity 39, the first slip 36 and the second slip 38 switch from the anchored position to the unsealed position, at least respectively, under the action of the first elastic component 70 and the second elastic component 80. That is, during the recovery phase, the first slip 36 and the second slip 38 switch from the anchored position to the unsealed position under the force of the soil layer and the force of the first elastic component 70 and the second elastic component 80, achieving active recovery, releasing the anchored state of the setting device 30, facilitating the recovery and reuse of the inclinometer 100, improving tool utilization efficiency, and reducing costs.

[0118] Exemplarily, in one specific embodiment, the first elastic component 70 includes a first tension spring and a first compression spring. The first compression spring is connected to the end of the first slip 36 away from the second slip 38, and the first tension spring is connected to the end of the first slip 36 near the second slip 38. In the anchored position, the first tension spring is stretched, and the first compression spring is compressed. During the recovery phase, under the action of the tension of the first tension spring and the thrust of the first compression spring, the first slip 36 returns to the unsealed position. Similarly, the second elastic component 80 includes a second tension spring and a second compression spring. The second compression spring is connected to the end of the second slip 38 away from the first slip 36, and the second tension spring is connected to the end of the second slip 38 near the first slip 36. In the anchored position, the second tension spring is stretched, and the second compression spring is compressed. During the recovery phase, under the action of the tension of the second tension spring and the thrust of the second compression spring, the second slip 38 returns to the unsealed position. Thus, the first elastic component 70 and the second elastic component 80, through the synergistic action of tension springs and compression springs, ensure that the first slip 36 and the second slip 38 can be successfully recovered during the recovery phase, avoiding slip detachment or well wall damage caused by forced removal, significantly improving the recoverability of the directional device 100, reducing construction costs, and lowering downhole operation risks.

[0119] Furthermore, this embodiment solves the problem of insufficient anchoring stability of traditional unidirectional slips by coordinating the first slip 36 and the second slip 38 with the first elastic component 70 and the second elastic component 80, respectively. The first slip 36 and the second slip 38 are connected to the outer shell 31 through the first elastic component 70 and the second elastic component 80, respectively. During bidirectional expansion, the anchoring force is jointly borne by the first slip 36 and the second slip 38, improving anchoring stability. The first elastic component 70 and the second elastic component 80 can also dynamically adjust the expansion force of the first slip 36 and the second slip 38 according to the wellbore pressure to adapt to different well depth conditions and further enhance reliability.

[0120] Another aspect of this application provides a steering method for a ramp 100, which can be used with the ramp 100 as described in any of the above embodiments. In conjunction with the foregoing explanation, the steering method includes the following steps:

[0121] The feeder 50 guides the inclined piece 10 from the locked position to the unlocked position;

[0122] The feed piece 50 is rotated by a preset angle around the axial direction of the setting device 30, and the guide piece 10 is simultaneously rotated by a preset angle around the axial direction of the setting device 30.

[0123] The guide piece 10 is switched from the unlocked position to the locked position by the feed piece 50.

[0124] Understandably, the steering of the steerer 100 can be performed by an operator or mechanical equipment using the above-described steering method, and this application embodiment does not limit this.

[0125] It is worth mentioning that the feeder 50 includes a feed rod 51 and an upper connector 52. One end of the feed rod 51 is detachably connected to the guide member 10, and the other end is connected to the upper connector 52. In embodiments where a feed channel 511 is provided within the feed rod 51, the upper connector 52 may have a feed inlet communicating with the feed channel 511. In some embodiments, a symbol indicating the rotation angle, such as an angle scale line, may also be provided on the upper connector 52 to facilitate control of the rotation angle when turning the guide member 10.

[0126] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0127] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A slant device, characterized in that, include: A setting device includes a housing and a rotating fixing member. The housing has an installation channel, the rotating fixing member is installed in the installation channel, and a first limiting part is provided at one end in the axial direction. A guide member, located on one side of the setting device along its axial direction, has one end of the guide member near the setting device inserted into the mounting channel and is provided with a second limiting portion; and The feed member is detachably connected to the guide member from the side of the guide member away from the setting device; The feeding member is configured to pull the guide member to switch between a locked position and an unlocked position along the axial direction of the sealing device; in the locked position, the first limiting part and the second limiting part are engaged to limit the rotation of the guide member around the axial direction of the sealing device; in the unlocked position, the first limiting part and the second limiting part are disengaged, and the guide member can rotate around the axial direction of the sealing device. Both the rotating fixing member and the guide member are sleeved on the feeding member. The setting device also includes a rotating fixing pin, which includes a large-diameter part and a small-diameter part connected to each other. The large-diameter part passes through the rotating fixing member along the radial direction of the setting device, and the small-diameter part passes through the feeding member along the radial direction of the setting device.

2. The slant device according to claim 1, characterized in that, The first limiting part has a plurality of limiting grooves spaced apart along the circumference of the sealing device, the openings of the limiting grooves facing the guide member, and the second limiting part has a plurality of limiting protrusions; In the locked position, one of the limiting protrusions is correspondingly inserted into one of the limiting grooves.

3. The slant device according to claim 2, characterized in that, The first limiting part includes a plurality of first limiting teeth arranged circumferentially along the sealing device, and the limiting groove is defined between two adjacent first limiting teeth. The second limiting part includes a plurality of second limiting teeth, and each second limiting tooth is formed as a limiting protrusion. In the locked position, the plurality of first limiting teeth and the plurality of second limiting teeth engage. The first limiting tooth has a first guide surface at its tip, and the second limiting tooth has a second guide surface at its tip. The first guide surface and the second guide surface are used to slide in contact before the first limiting tooth and the second limiting tooth mesh.

4. The slant device according to claim 1, characterized in that, The setting device further includes: An anchoring assembly, installed in the mounting channel and located on the side of the rotating fixing member away from the guide member, includes a first slip and a second slip spaced axially along the setting device. The side wall of the housing is provided with a first setting opening and a second setting opening corresponding to the first slip and the second slip, respectively. Both the first setting opening and the second setting opening are connected to the mounting channel. Both the first slip and the second slip have at least an anchoring position, wherein the first slip extends radially out of the first sealing opening of the sealing device, and the second slip extends radially out of the second sealing opening of the sealing device.

5. The slant device according to claim 4, characterized in that, Both the first and second slips also have an unsealing position, and the anchoring assembly further includes: The central tube is suspended within the mounting channel and extends axially along the setting device; A first piston is slidably fitted onto one end of the central tube, and the outer diameter of the bottom of the first piston is larger than the outer diameter of the top of the first piston. A first slip is located outside the top of the first piston. In the unsealed position, the first piston and the first slip are connected by a first slip pin that passes radially through the sealing device. The second piston is slidably sleeved on the other end of the central tube, and the outer diameter of the bottom of the second piston is larger than the outer diameter of the top of the second piston. The second slip is located outside the top of the second piston. In the unsealing position, the second piston and the second slip are connected by a second slip pin that passes through the radial direction of the sealing device. The outer wall of the central tube, the bottom of the first piston, the bottom of the second piston, and the inner wall of the outer shell together define an annular cavity. The central tube has a central channel and a side channel connecting the central channel and the annular cavity. The central channel is connected to the feeding channel of the feeding member. The first piston and the second piston can be pushed by the fluid entering the annular cavity to slide opposite each other along the axial direction of the setting device, shearing the first slip pin and the second slip pin, and pushing the first slip and the second slip from the unsealing position to the anchoring position.

6. The slant device according to claim 5, characterized in that, The anchoring component further includes: A first elastic component, connecting the first slip and the outer shell, has a tendency to hold the first slip in the unsealed position; and A second elastic component, connecting the second slip and the outer casing, has a tendency to hold the second slip in the unsealed position; Specifically, based on the fluid outflow within the annular cavity, the first slip and the second slip switch from the anchoring position to the unsealing position at least respectively under the action of the first elastic component and the second elastic component.

7. The slant device according to claim 6, characterized in that, The setting device further includes: The lower plug is connected to the end of the outer casing away from the feed member; The positioning assembly, located inside the lower plug, includes a limiting ring and a retaining ring. The limiting ring is connected to the top end of the second piston. The limiting ring can move within the lower plug along the axial direction of the setting device. The limiting ring defines a receiving groove inside and has a connecting hole in the side wall that communicates with the receiving groove. The retaining ring is located in the receiving groove and partially elastically extends out of the connecting hole. The inner wall of the lower plug is provided with multiple check teeth arranged along the axial direction of the setting device. The portion of the retaining ring that protrudes from the connecting hole engages with the check teeth to prevent the retaining ring from moving closer to the central tube along the axial direction of the setting device.

8. The slant device according to claim 7, characterized in that, The second piston includes: The piston body is sleeved on the central tube and can rotate around the central tube to have a working position and a retraction position, and the piston body has a first piston chamber communicating with the central channel; A drainage section, connected to the piston body, and rotatably inserted through the limiting ring along the axial direction of the setting device, includes a drainage channel that communicates with the first piston chamber via a connecting port. The inner diameter of the drainage channel is smaller than the inner diameter of the first piston chamber. A baffle plate is connected to the end of the piston body away from the drainage part and is located inside the annular cavity; The setting device further includes a sealing ball, which is configured to be dissolved by a set fluid. In the working position, the sealing ball is inserted into the first piston chamber to block the communication port. The fluid entering the central channel enters the annular cavity through the side flow channel, driving the piston body and the first piston to move, and driving the first slip and the second slip to switch from the unsealing position to the anchoring position. The sealing ball is at least partially dissolved and falls into the drainage channel, the fluid in the annular cavity flows out into the drainage channel, and the piston body is switched to the recovery position, the baffle isolates the side flow channel from the annular cavity; The drainage part also has a liquid guiding hole, and the limiting ring has a liquid guiding channel. Based on the piston body being switched to the recovery position, the liquid guiding hole is connected to the liquid guiding channel, and the liquid guiding channel is connected to the outside of the retaining ring in the receiving groove. The fluid pushes the retaining ring to retract and space it from the check tooth. The first slip and the second slip are switched from the anchoring position to the unsealing position at least respectively under the action of the first elastic component and the second elastic component.

9. The slant device according to claim 5, characterized in that, The setting device further includes: The nozzle has one end fitted by the rotating fixing member and the other end fitted by the first piston. A connecting channel is provided inside the nozzle. One end of the feeding member passes through the connecting channel, and the feeding member has a feeding channel. The connecting channel connects the feeding channel and the central channel. The rotating retaining pin includes a large-diameter portion and a small-diameter portion connected together. The large-diameter portion passes through the rotating retaining member and the nozzle in the radial direction of the setting device, and the small-diameter portion passes through the nozzle and the feeding member in the radial direction of the setting device.

10. A steering method for a ramp, used in any one of claims 1 to 9, characterized in that, include: The guide member is switched from the locked position to the unlocked position by being pulled by the feeding member; The feeder is rotated by a preset angle around the axis of the setting device, and the guide member is simultaneously rotated by a preset angle around the axis of the setting device. The guide member is pulled from the unlocked position to the locked position by the feeding member.

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