Downhole setting mechanism and control method thereof, downhole setting device

Abstract

The embodiment of the application relates to the technical field of downhole tools for oil exploitation, and discloses a downhole setting mechanism, a control method thereof and a downhole setting device. The downhole setting mechanism comprises a shell, an elastic release mechanism, a connecting base and a self-locking anchoring mechanism. The bottom of the elastic release mechanism is provided with a clamping plate structure, the connecting base comprises a first clamping groove and a release position, the self-locking anchoring mechanism comprises a conical seat, a slip structure and a self-locking mechanism arranged in sequence along the axial direction of the shell, the elastic release mechanism is also used for receiving a starting signal, and in response to the starting signal, the clamping plate structure is controlled to rotate to the release position to release the elastic release mechanism, so as to form a thrust force on the conical seat, the slip structure is expanded under the action of the thrust force to realize anchoring, and the self-locking structure forms a locking state. The downhole setting mechanism disclosed by the application can ensure the safety of the setting mechanism, thereby improving the operation reliability and working efficiency of the setting mechanism.

Description

Technical Field

[0001] This application relates to the field of downhole tools technology for oil extraction, and in particular to a downhole setting mechanism and its control method, and a downhole setting device. Background Technology

[0002] Hydraulic fracturing is a method used in oil or gas extraction to create fractures in oil and gas reservoirs using hydraulic pressure. This pressure technology improves the underground flow environment of oil, increases well production, and plays a crucial role in improving bottomhole flow conditions, mitigating inter-layer stress, and enhancing reservoir dynamics.

[0003] During fracturing operations, a setting device is required at a designated location to seal the lower fracturing formation and achieve fracturing of the surrounding formation above the setting device. Currently, traditional fracturing technology uses a tubing string to lower the setting device to achieve staged fracturing of the downhole oil layer. The operational reliability and efficiency of the setting device can improve oil production efficiency while preventing safety accidents. Therefore, how to improve the operational reliability and efficiency of the setting device to achieve efficient setting is a pressing technical problem that needs to be solved in downhole operations. Summary of the Invention

[0004] The purpose of this application is to provide at least one downhole setting mechanism and its control method, and a downhole setting device, which can at least improve the operational reliability and working efficiency of the setting mechanism.

[0005] To solve the above-mentioned technical problems, at least one embodiment of this application provides a downhole setting mechanism, the setting mechanism comprising: a housing, an elastic release mechanism sequentially disposed on the housing, a connecting base, and a self-locking anchoring mechanism;

[0006] The bottom of the elastic release mechanism is provided with a retaining plate structure. The connecting base is fixedly connected to the housing. The connecting base includes a first retaining groove and a release position. The first retaining groove is used to allow the retaining plate structure to rotate and restrict the retaining plate structure to move axially along the housing. The release position is used to accommodate the retaining plate structure to release the pre-tightening state of the elastic release mechanism.

[0007] The self-locking anchoring mechanism includes a conical seat, a slip structure, and a self-locking mechanism arranged sequentially along the axial direction of the housing. The conical seat is slidably connected to the inner wall of the housing and the slip structure. The self-locking mechanism is located at the bottom of the conical seat, and the conical seat has a receiving cavity corresponding to the release position.

[0008] The elastic release mechanism is also used to receive a start signal. In response to the start signal, when the locking plate structure is rotated to the release position, the elastic release mechanism is released, so that the locking plate structure moves in the receiving cavity in the direction toward the self-locking anchoring mechanism to generate a thrust on the conical seat. The slip structure expands under the action of the thrust to protrude from the side wall of the housing to achieve anchoring. The self-locking structure forms a locked state to restrict the slip structure from moving radially along the housing.

[0009] In some exemplary embodiments, the bottom of the receiving cavity is provided with a second slot for the card plate structure to rotate;

[0010] The elastic release mechanism is also used to receive a locking signal and, in response to the locking signal, control the card plate structure to rotate into the second card slot to limit the radial and axial displacement of the conical seat along the housing.

[0011] In some exemplary embodiments, the elastic release mechanism includes a power transmission structure and a pre-tightening structure arranged sequentially along the axial direction of the housing, and the clamping plate structure is fixedly connected to the bottom of the pre-tightening structure;

[0012] The power transmission structure is connected to the pre-tightening structure. The pre-tightening structure drives the clamping plate structure to rotate within the connecting base under the rotation of the power transmission structure, so that the pre-tightening structure is in a pre-tightened state or a released state.

[0013] In some exemplary embodiments, the power transmission structure includes a motor and a transmission structure;

[0014] The motor is coaxially connected to the transmission structure, and the transmission structure is drive-connected to the pre-tightening structure.

[0015] In some exemplary embodiments, the pretensioning structure includes a telescopic shaft, an elastic element, and a base, wherein the base is provided with a retaining plate structure;

[0016] The upper part of the telescopic shaft is engaged with the transmission structure via a screw, and the elastic element is sleeved on the other part of the telescopic shaft. The two ends of the elastic element abut against the transmission structure and the base, respectively.

[0017] In some exemplary embodiments, the self-locking mechanism includes a dovetail structure and a snap-fit ​​plate. The dovetail structure is connected to the bottom of the conical seat, and the snap-fit ​​plate is fixedly connected to the housing. The snap-fit ​​plate is provided with a dovetail groove, and the dovetail structure passes through the dovetail groove to form a snap-fit ​​structure with the snap-fit ​​plate to form a locked state.

[0018] At least one embodiment of this application provides a control method for a downhole setting mechanism, the control method comprising:

[0019] Receive start signal;

[0020] In response to the start signal, when the locking plate structure of the control elastic release mechanism rotates to the release position within the connecting base, the elastic release mechanism is released, causing the locking plate structure to move within the receiving cavity in the direction toward the conical seat, thereby generating a thrust on the conical seat. Under the action of the thrust, the slip structure expands and protrudes from the side wall of the housing to achieve anchoring, and the self-locking mechanism forms a locked state to restrict the radial movement of the slip structure along the housing.

[0021] At least one embodiment of this application provides that, when anchoring is achieved in the kawai structure, the control method further includes:

[0022] Upon receiving a locking signal, the card plate structure is rotated into the second slot in response to the locking signal, thereby limiting the radial and axial displacement of the conical seat along the housing.

[0023] At least one embodiment of this application provides a downhole setting device, including the downhole setting mechanism as described above;

[0024] The identification module is used to send a target signal when a preset position is identified, wherein the preset position is earlier than and close to the sealing position;

[0025] The control module is electrically connected to the identification module and the sealing mechanism respectively. The control module is used to send a start signal to the sealing mechanism according to the target signal.

[0026] In some exemplary embodiments, the control module is further configured to send a locking signal to the setting mechanism when the slip structure of the setting mechanism is anchored.

[0027] This application discloses a downhole setting mechanism and its control method, as well as a downhole setting device. The setting mechanism uses a pre-tightened spring release mechanism with a locking plate structure that engages with a connecting base plate. When rotated to the release position of the connecting base, the elastic release mechanism releases, causing the locking plate structure to move within the receiving cavity of the conical seat in the direction towards the conical seat, generating a thrust on the conical seat. Under this thrust, the slip structure expands, protruding from the side wall of the casing and contacting the casing. The engagement of the slip structure with the inner wall of the casing effectively slows down the overall descent speed of the setting mechanism, achieving anchoring. A self-locking structure forms a locked state, restricting the radial movement of the slip structure along the casing and enhancing its locking effect. This application employs a combination of a spring release mechanism and a self-locking anchoring mechanism; relying on their synergistic action, a reliable fixing effect is achieved, ensuring the safety of the setting mechanism and thus improving its operational reliability and working efficiency. Attached Figure Description

[0028] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, and these illustrative descriptions do not constitute a limitation on the embodiments.

[0029] Figure 1 This is a schematic diagram of the overall structure of a downhole setting mechanism provided in one embodiment of this application;

[0030] Figure 2 This is a cross-sectional structural schematic diagram of a downhole setting mechanism provided in one embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a downhole setting mechanism in a pre-tightened state, provided by one embodiment of this application;

[0032] Figure 4 This is a schematic diagram showing the relative positions of the first slot and the card plate structure on the connecting base according to an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the card plate structure provided in one embodiment of this application when it is in the release position;

[0034] Figure 6 This is a schematic diagram of the structure of an elastic release mechanism in a downhole setting mechanism when the pre-tightening state is released, according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the structure of an elastic release mechanism in a downhole setting mechanism in a released state, provided by one embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure of a downhole setting mechanism after anchoring, provided in one embodiment of this application;

[0037] Figure 9 This is a flowchart of a control method for a downhole setting mechanism provided in one embodiment of this application;

[0038] Figure 10 This is a schematic diagram of a downhole setting mechanism device provided in another embodiment of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this application to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0040] To address the aforementioned technical issues regarding the operational reliability and efficiency of the setting mechanism, this application proposes a downhole setting mechanism. Compared to existing technologies, the embodiment of this application involves a spring release mechanism in a pre-tensioned state where the locking plate structure engages with the connecting base plate. When rotated to the release position of the connecting base, the elastic release mechanism releases, causing the locking plate structure to move within the receiving cavity of the conical seat in the direction towards the conical seat, generating a thrust on the conical seat. Under this thrust, the slip structure expands, protruding from the side wall of the casing and contacting the casing. The engagement of the slip structure with the inner wall of the casing effectively slows down the overall descent speed of the setting mechanism and achieves anchoring at the release position. The elastic release mechanism then releases, and the self-locking structure enters a locked state, restricting the radial movement of the slip structure along the casing and enhancing its locking effect. This application employs a combination of a spring release mechanism and a self-locking anchoring mechanism. By relying on the synergistic effect of these two mechanisms, a reliable fixing effect is achieved, ensuring the safety of the setting mechanism and thus improving its operational reliability and efficiency.

[0041] Example 1:

[0042] The embodiments of this application relate to a downhole setting mechanism.

[0043] The following is a detailed description of the implementation details of the downhole setting mechanism in this embodiment. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0044] like Figure 1 As shown, an exemplary embodiment of the present application provides a downhole setting mechanism 100. Exemplarily, the main function of the setting mechanism 100 is to perform the setting action. The setting mechanism 100 includes: a housing 10, an elastic release mechanism 20, a connecting base 30, and a self-locking anchoring mechanism 40 sequentially disposed on the housing 10.

[0045] like Figure 2 As shown, Figure 2 This is a schematic cross-sectional view of a downhole setting mechanism provided as an example. (In conjunction with...) Figure 1 and Figure 2 As shown, the housing 10 mainly serves to protect the internal structure. The elastic release mechanism 20 is fixedly connected to the upper part of the housing 10, the connecting base 30 is fixedly connected to the inner wall of the middle part of the housing 10, and the self-locking anchoring mechanism 40 is fixedly connected to the lower part of the housing. The connecting base 30 is located between the elastic release mechanism 20 and the self-locking anchoring mechanism 40, providing connection and fixation between the two.

[0046] For example, the elastic release mechanism 20 has two operating states, including a pre-tensioned state and a released state. Figure 3 As shown, an exemplary schematic diagram of the elastic release mechanism 20 in a pre-tightened state is illustrated.

[0047] Combination Figure 2 and Figure 3 As shown, specifically, the top end of the elastic release mechanism 20 is fixedly connected to the housing 10, and the bottom of the other end of the elastic release mechanism 20 is provided with a locking plate structure 23. When the elastic release mechanism 20 is in the pre-tightened state, the locking plate structure 23 is engaged with the connecting base 30. The locking plate structure 23 can be, for example, a square structure or a plate-shaped structure.

[0048] Among them, such as Figure 3 As shown, a first slot 31 is provided inside the connecting base 30. The first slot 31 is, for example, a groove structure that extends laterally (inward) along the center of the connecting base 30. The outer circumferential dimension of the first slot 31 is larger than the outer circumferential dimension of the card plate structure 23 to accommodate the card plate structure 23 and allow the card plate structure 23 to rotate left and right.

[0049] like Figure 3 As shown, when the elastic release mechanism 20 is in the pre-tightened state, the locking plate structure 23 is engaged in the first locking groove 31 to connect with the connecting base 30. Since the connecting base 30 is fixed to the housing 10, the first locking groove 31 restricts the axial displacement of the locking plate structure 23 along the housing 10, thereby keeping the elastic release mechanism 20 in the pre-tightened state.

[0050] like Figure 4 As shown, an exemplary schematic diagram illustrates the relative positions of the first slot 31 on the connecting base 30 and the card plate structure 23. Combined with... Figure 3 and Figure 4 As shown, the first slot 31 can be a hollow circular structure, and the connecting base 30 is also provided with a release position 32 for releasing the pre-tightened state of the elastic release mechanism 20.

[0051] For example, openings are provided on both sides of the first card slot 31 at a centrally symmetrical position. The openings on both sides form a square opening that communicates with the middle area of ​​the connecting base 30. The square opening can accommodate the card plate structure 23. The position of the square opening is the release position 32 of the release elastic release mechanism 20.

[0052] like Figure 3 and Figure 4 As shown, when the elastic release mechanism 20 is in the pre-tightened state, the locking plate structure 23 is engaged in the first locking groove 31 and forms an angle with the release position 32. For example, as... Figure 4 As shown, the locking plate structure 23 forms a 90° angle with the release position 32. When the locking plate structure 23 forms a 90° angle with the release position 32, the locking and fixing effect on the elastic release mechanism 20 in the pre-tightened state is better. In other exemplary embodiments, the angle can also be 30°, 45°, 50°, 60°, etc., and no specific limitation is made here.

[0053] The elastic release mechanism 20 is also used to receive a start signal. Upon receiving the start signal, in response to the start signal, it controls the card plate structure 23 to rotate within the first slot 31 of the connecting base 30. It can control the card plate structure 23 to rotate clockwise or counterclockwise to reach the release position 32. This application can achieve elastic instantaneous release and restraint by adjusting the positional relationship between the card plate structure 23 and the connecting base 30. The operation process is simple and convenient, improving work efficiency.

[0054] like Figure 5 The diagram shows a schematic representation of the card plate structure 23 in the released position 32 of the connecting base 30. Figure 6 As shown, an exemplary structural diagram of the elastic release mechanism 20 when it is released from its pre-tightened state is illustrated. Combined with... Figure 5 and Figure 6 As shown, when the control plate structure 23 is rotated to the release position 32, the control plate structure 23 coincides with the release position 32, and the control plate structure 23 is released from the restriction of the first slot 31, thereby releasing the elastic release mechanism 20, and the elastic release mechanism 20 is released from the pre-tightening state.

[0055] like Figure 2 As shown, the self-locking anchoring mechanism 40 includes a conical seat 41, a slip structure 42 and a self-locking mechanism 43 arranged sequentially along the axial direction of the housing 10. The conical seat 41 is slidably connected to the inner wall of the housing 10 and the slip structure 42.

[0056] Exemplarily, the conical seat 41 is connected to the housing 10 via a first guide groove (not shown in the figure) extending axially along the housing 10, and the locking structure 42 is connected to the conical seat 41 via a second guide groove (not shown in the figure) extending along the contact surface between the locking structure 42 and the conical seat 41. Exemplarily, a smooth first guide groove and a second guide groove can be machined on the outer surface of the conical seat 41 to achieve a sliding connection through the first guide groove engaging with the inner wall of the housing 10, and to achieve a sliding connection through the second guide groove engaging with the inner side of the locking structure 42.

[0057] The slip structure 42 is a key component that directly contacts the inner wall of the casing to achieve anchoring, and is usually made of high-strength, wear-resistant metal. The outer surface of the slip structure 42 can be designed with special tooth shapes or textures, such as serrated or trapezoidal teeth, so that it can be firmly embedded in the inner wall of the casing during anchoring, providing sufficient friction and anchoring force to prevent the entire downhole setting mechanism 100 from moving up and down or rotating inside the casing. The slip structure 42 can be an integral structure or a split structure composed of multiple slip segments 421.

[0058] For example, combined Figure 1 and Figure 3 As shown, the slip structure 42 includes a split structure composed of multiple slip segments 421. The split slip structure 42 can better adapt to different sleeve shapes and sizes, improving the uniformity and reliability of anchoring. For example, in the slip assembly composed of multiple slip segments 421, adjacent slip segments 421 can be connected using connecting ribs or pins, allowing them to expand synchronously under the action of the conical seat 41. The sidewall of the housing 10 is provided with openings corresponding to the multiple slip segments 421 (not shown in the figure). After expansion, the multiple slip segments 421 pass through the multiple openings and protrude from the sidewall of the housing 10, contacting the inner wall of the sleeve.

[0059] like Figure 3 , Figures 6 to 8As shown, the conical seat 41 is provided with a receiving cavity 411 corresponding to the release position 32. This receiving cavity 411 is used to allow the clamping plate structure 23 to move in the direction toward the conical seat 41 when the elastic release mechanism 20 is released from the pre-tightening state, so as to generate a thrust on the conical seat 41. When the conical seat 41 is pushed by the thrust to move axially along the housing 10, the clamping structure 42 expands under the thrust to achieve radial movement, so that multiple clamping flaps 421, which are opened by the conical seat 41, protrude from the side wall of the housing 10. Through the contact of multiple clamping flaps 421 with the inner wall of the sleeve, the overall falling movement speed of the setting mechanism is effectively slowed down. As the clamping structure 42 gradually expands, multiple clamping flaps 421 engage with the inside of the sleeve to achieve anchoring. The elastic release mechanism 20 completes the release. The self-locking mechanism 43 is provided at the bottom of the conical seat 41. After the clamping structure 42 is anchored, the self-locking structure forms a locked state to restrict the radial movement of the clamping structure 42 along the housing 10.

[0060] The downhole setting mechanism provided in this application relies on the rotation of the control locking structure 23 within the connecting base 30 to release the spring release mechanism 20. The released spring release mechanism 20 exerts a thrust on the conical seat 41 of the self-locking anchoring mechanism 40 to expand the slip structure 42, causing the slip structure 42 to protrude from the side wall of the housing 10 and contact the casing, thereby effectively slowing down the overall falling movement speed of the setting mechanism 100. Anchoring is achieved through the gradual engagement of the slip structure 42 with the inner wall of the casing. After the elastic release mechanism 20 completes its release, the self-locking structure forms a locked state to restrict the radial movement of the slip structure 42 along the housing 10, further enhancing the locking effect of the slip structure 42.

[0061] The downhole setting mechanism 100 of this application can achieve elastic instantaneous release and restriction by adjusting the positional relationship between the clamping plate structure 23 and the connecting base 30. It adopts a spring release mechanism 20 and a self-locking anchoring mechanism 40 in cooperation. That is, by relying on the synergistic effect of the spring release mechanism 20 and the self-locking anchoring mechanism 40, the overall falling movement speed of the setting mechanism 100 can be effectively slowed down. The self-locking anchoring mechanism 40 can be firmly fixed at the designated position of the downhole casing, achieving a reliable fixing effect and ensuring the safety and operational reliability of the setting mechanism.

[0062] Example 2:

[0063] The embodiments of this application relate to a downhole setting mechanism, which is basically the same as the downhole setting mechanism of the above embodiments. The difference between this embodiment and the above embodiments is that this embodiment is a specific embodiment of an elastic release mechanism.

[0064] Combination Figures 2-4As shown, the elastic release mechanism 20 includes a power transmission structure 21 and a pre-tightening structure 22 arranged sequentially along the axial direction of the housing 10. The bottom of the clamping plate structure 23 is fixedly connected to the pre-tightening structure 22, so that the clamping plate structure 23 and the pre-tightening structure 22 can rotate simultaneously.

[0065] The power transmission structure 21 and the pre-tightening structure 22 are connected by a transmission. The power transmission structure 21 is used to provide power and rotation. Under the rotation of the power transmission structure 21, the pre-tightening structure 22 drives the clamping plate structure 23 to rotate in the first clamping groove 31 of the connecting base 30. When the clamping plate structure 23 is in the release position 32, the pre-tightening structure 22 is released. When the clamping plate structure 23 and the release position 32 form an angle, the pre-tightening structure 22 is in the pre-tightened state.

[0066] In an exemplary embodiment, such as Figure 3 As shown, the power transmission structure 21 includes a motor 211 and a transmission structure 212; the motor 211 and the transmission structure 212 are coaxially connected, and the transmission structure 212 is connected to the pre-tensioning structure 22.

[0067] like Figure 3 As shown, the motor 211 is located at the top of the housing 10 (as shown in the figure). The motor 211 rotates synchronously with the transmission structure 212. When the motor 211 rotates, it causes the transmission structure 212 to rotate, and the preload structure 22 rotates along with the transmission structure 212. For example, the transmission structure 212 can be a transmission gear.

[0068] In an exemplary embodiment, such as Figures 2-3 As shown, the pre-tightening structure 22 includes a telescopic shaft 221, an elastic element 222, and a base 223. The elastic element 222 is sleeved on the outside of the telescopic shaft 221, the base 223 is fixedly connected to the bottom end of the telescopic shaft 221, and the bottom of the base 223 is fixedly connected to the clamping plate structure 23.

[0069] like Figure 3 As shown, the upper part of the telescopic shaft 221 is engaged with the transmission structure 212 via a screw. The elastic element 222 is sleeved on the other part of the telescopic shaft 221. The two ends of the elastic element 222 abut against the transmission structure 212 and the base 223 respectively. The motor 211 rotates to drive the pre-tightening structure 22 to rotate, thereby changing the distance between the transmission structure 212 and the base 223, so as to compress and release the elastic element 222, thereby making the elastic release mechanism 20 in the pre-tightening state and the release state.

[0070] Example 3:

[0071] The embodiments of this application relate to a downhole setting mechanism, which is basically the same as the downhole setting mechanism of the above embodiments. The difference between this embodiment and the above embodiments is that this embodiment is a specific implementation of a self-locking anchoring mechanism.

[0072] like Figures 2 to 3 As shown, the self-locking mechanism 43 in the self-locking anchoring mechanism 40 is an exemplary mortise and tenon structure. In this embodiment, the self-locking structure 43 includes a dovetail structure 431 and a snap-fit ​​plate 433. The dovetail structure 431 is integrally connected to the bottom of the conical seat 41. The snap-fit ​​plate 433 is provided with a dovetail groove 432. The dovetail structure 431 passes through the dovetail groove 432 and forms a snap-fit ​​structure with the snap-fit ​​plate 433 to form a locked state, thereby enhancing the locking effect of the latch structure 42.

[0073] Example 4:

[0074] The embodiments of this application relate to a downhole setting mechanism, which is basically the same as the downhole setting mechanism of the above embodiments. The difference between this embodiment and the above embodiments is that this embodiment is a specific implementation of a conical seat.

[0075] like Figure 3 As shown, the bottom of the receiving cavity 411 of the conical seat 41 is provided with a second slot 412 for the card plate structure 23 to rotate. The outer circumferential dimension of the second slot 412 is larger than the outer circumferential dimension of the receiving cavity 411.

[0076] like Figure 3 As shown, the second slot 412 communicates with the bottom of the receiving cavity 411 and retracts inward toward the conical seat 41 to allow the card plate structure 23 to rotate. Exemplarily, the second slot 412 can be a circular structure, or it can be the same size and structure as the first slot 31, or it can be different; no specific limitation is made here.

[0077] In this embodiment, after the locking structure 42 is anchored and sealed, the elastic release mechanism 20 is also used to receive a locking signal and, in response to the locking signal, control the locking plate structure 23 to rotate counterclockwise or clockwise into the second locking groove 412 to limit the radial and axial displacement of the conical seat 41 along the housing 10, thereby ensuring the high efficiency of the locking state of the locking structure 42.

[0078] Example 5:

[0079] The embodiments of this application relate to a control method for a downhole setting mechanism, such as... Figure 9 As shown, the control method includes:

[0080] Step S110: Receive the start signal;

[0081] Step S120: In response to the start signal, when the locking plate structure of the elastic release mechanism is rotated to the release position within the connecting base, the elastic release mechanism is released, causing the locking plate structure to move within the receiving cavity in the direction toward the self-locking anchoring mechanism, thereby generating a thrust on the conical seat. The locking structure expands under the thrust to protrude from the side wall of the housing to achieve anchoring, and the self-locking mechanism forms a locked state to restrict the radial movement of the locking structure along the housing.

[0082] like Figures 2-4 As shown, in this embodiment, the setting mechanism 100 can be lowered via the casing. Before the setting mechanism 100 is lowered into the well, the elastic release mechanism 20 is in a pre-tightened state. Specifically, the locking plate structure 23 of the elastic release mechanism 20 is engaged within the connecting base 30 and forms an angle with the release position 32 of the connecting base 30. At this time, the pre-tightening structure 22 of the elastic release mechanism 20 is in a compressed state, thereby achieving the pre-tightened state of the spring release mechanism.

[0083] When the setting mechanism 100 is lowered to the preset position downhole, it can receive a start signal through the power transmission structure 21 of the elastic release mechanism 20. In response to the start signal, the motor 211 is controlled to start. The rotation of the motor 211 causes the transmission structure 212 to rotate, thereby driving the pre-tightening structure 22 to rotate. The clamping plate structure 23 rotates synchronously with the pre-tightening structure 22. For example... Figures 5-6 As shown, when the clamping plate structure 23 rotates to coincide with the release position 32 of the connecting base 30, the compression state of the pre-tightening structure 22 is released, thereby releasing the pre-tightening state of the spring release mechanism.

[0084] like Figure 7 and Figure 8 As shown, due to the instantaneous release of the compression of the pre-tightening structure 22, the clamping plate structure 23 quickly enters the receiving cavity 411 of the conical seat 41. The clamping plate structure 23 moves within the receiving cavity 411 in the direction toward the conical seat 41 until it contacts the bottom of the receiving cavity 411 and exerts a thrust on the conical seat 41. The conical seat 41 and the slip structure 42 move relative to each other, thereby pushing the slip structure 42 outward and gradually fitting against the inner wall of the sleeve to reduce the descent speed of the setting mechanism. After the slip structure 42 is fully opened, it forms an interlocking structure with the inside of the sleeve, thus firmly locking the setting mechanism 100 in the setting position of the sleeve. At the same time, the dovetail structure 431 located at the bottom of the conical seat 41 passes through the dovetail groove 432 and forms an interlocking structure with the clamping plate 433 to form a locked state, thereby restricting the radial movement of the slip structure 42 along the housing 10 and further enhancing the clamping effect of the slip structure 42.

[0085] The entire process described above not only relies on the precise control of the motor 211, but also on the synergistic effect of the spring release mechanism and the self-locking anchoring mechanism 40 to achieve a reliable fixing effect, ensuring the safety and operational reliability of the downhole setting mechanism 100.

[0086] In an exemplary embodiment, when the kawai structure achieves anchoring, the control method further includes:

[0087] Upon receiving a locking signal, the control plate structure is rotated into the second slot in response to the locking signal, thereby limiting the radial and axial displacement of the conical seat along the housing.

[0088] like Figure 8 As shown, when the locking structure 42 is anchored, a locking signal can be received through the elastic release mechanism 20 to control the motor 211 to start again. The rotation of the motor 211 drives the transmission structure 212 to rotate, and the pre-tightening structure 22 rotates synchronously with the transmission structure 212, causing the locking plate structure 23 to rotate within the second slot 412 of the conical seat 41, thereby forming an angle with the opening of the receiving cavity 411 again. At this time, the locking plate structure 23 and the second slot 412 are engaged, making the self-locking structure locked. At this time, the conical seat 41 is fixed both above and below, thereby effectively preventing radial loosening and axial displacement of the conical seat 41, thus ensuring the high efficiency of the locking state of the locking structure 42.

[0089] Example 6:

[0090] This application also provides a downhole setting device, including the downhole setting mechanism 100 provided in any of the above embodiments;

[0091] The identification module 200 is used to send a target signal when a preset position is identified, the preset position being earlier than and close to the sealing position;

[0092] The control module 300 is electrically connected to the identification module 200 and the sealing mechanism 100, respectively. The control module is used to send a start signal to the sealing mechanism 100 according to the target signal.

[0093] The downhole setting device provided in this embodiment has a preset depth set as a preset position before the setting device is lowered. The preset position is set before and close to the setting position so that when setting the device below the well casing, the identification module 200 can identify whether the depth of the well casing has reached the preset position. When the preset position is identified, a target signal is sent to the control module 300. The control module 300 receives the target signal and sends a start signal to the setting mechanism 100 according to the target signal. According to the start signal, the setting mechanism 100 controls the clamping plate structure of the elastic release mechanism to rotate to the release position in the connecting base, and releases the elastic release mechanism. This causes the clamping plate structure to move in the receiving cavity in the direction toward the conical seat to generate thrust on the conical seat. Under the action of thrust, the slip structure expands and protrudes from the side wall of the shell and contacts the casing, gradually decelerating. After the elastic release mechanism completes its release, it reaches the setting position and can be anchored. The self-locking mechanism forms a locked state to restrict the movement of the slip structure along the radial direction of the shell. The setting mechanism in this setting device employs a combination of a spring release mechanism and a self-locking anchoring mechanism. By relying on the synergistic effect of the spring release mechanism and the self-locking anchoring mechanism, a reliable fixing effect is achieved, ensuring the safety of the setting mechanism and thus improving the operational reliability and working efficiency of the setting mechanism.

[0094] In some exemplary embodiments, the control module 300 is further configured to send a locking signal to the setting mechanism 100 when the slip structure of the downhole setting mechanism 100 is anchored. Upon receiving the locking signal, the setting mechanism 100 controls the slip structure to rotate into the second slip slot in response to the locking signal, thereby limiting the radial and axial displacement of the conical seat along the housing.

[0095] It should be understood that the terms "mechanism," "structure," "device," and "component" used in this application are merely one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they can be replaced by other expressions.

[0096] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application. In practical applications, the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification, and various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A downhole setting mechanism, characterized in that, The setting mechanism includes: a housing, an elastic release mechanism, a connecting base, and a self-locking anchoring mechanism sequentially disposed on the housing; The bottom of the elastic release mechanism is provided with a retaining plate structure. The connecting base is fixedly connected to the housing. The connecting base includes a first retaining groove and a release position. The first retaining groove is used to allow the retaining plate structure to rotate and restrict the retaining plate structure to move axially along the housing. The release position is used to accommodate the retaining plate structure to release the pre-tightening state of the elastic release mechanism. The self-locking anchoring mechanism includes a conical seat, a slip structure, and a self-locking mechanism arranged sequentially along the axial direction of the housing. The conical seat is slidably connected to the inner wall of the housing and the slip structure. The self-locking mechanism is located at the bottom of the conical seat, and the conical seat has a receiving cavity corresponding to the release position. The elastic release mechanism is also used to receive a start signal. In response to the start signal, when the locking plate structure is rotated to the release position, the elastic release mechanism is released, so that the locking plate structure moves in the receiving cavity in the direction toward the self-locking anchoring mechanism to generate a thrust on the conical seat. The slip structure expands under the action of the thrust to protrude from the side wall of the housing to achieve anchoring. The self-locking structure forms a locked state to restrict the slip structure from moving radially along the housing.

2. The downhole setting mechanism according to claim 1, characterized in that, The bottom of the receiving cavity is provided with a second slot for the card plate structure to rotate; The elastic release mechanism is also used to receive a locking signal and, in response to the locking signal, control the card plate structure to rotate into the second card slot to limit the radial and axial displacement of the conical seat along the housing.

3. The downhole setting mechanism according to claim 1 or 2, characterized in that, The elastic release mechanism includes a power transmission structure and a pre-tightening structure arranged sequentially along the axial direction of the housing, and the clamping plate structure is fixedly connected to the bottom of the pre-tightening structure. The power transmission structure is connected to the pre-tightening structure. The pre-tightening structure drives the clamping plate structure to rotate within the connecting base under the rotation of the power transmission structure, so that the pre-tightening structure is in a pre-tightened state or a released state.

4. The downhole setting mechanism according to claim 3, characterized in that, The power transmission structure includes a motor and a transmission structure; The motor is coaxially connected to the transmission structure, and the transmission structure is drive-connected to the pre-tightening structure.

5. The downhole setting mechanism according to claim 4, characterized in that, The pre-tightening structure includes a telescopic shaft, an elastic element, and a base, wherein the base is provided with a clamping plate structure; The upper part of the telescopic shaft is engaged with the transmission structure via a screw, and the elastic element is sleeved on the other part of the telescopic shaft. The two ends of the elastic element abut against the transmission structure and the clamping plate structure, respectively.

6. The downhole setting mechanism according to claim 1, characterized in that, The self-locking mechanism includes a dovetail structure and a snap-fit ​​plate. The dovetail structure is connected to the bottom of the conical seat, and the snap-fit ​​plate is fixedly connected to the housing. The snap-fit ​​plate is provided with a dovetail groove, and the dovetail structure passes through the dovetail groove to form a snap-fit ​​structure with the snap-fit ​​plate to form a locked state.

7. A control method for a downhole setting mechanism, characterized in that, The control method includes: Receive start signal; In response to the start signal, when the locking plate structure of the control elastic release mechanism rotates to the release position within the connecting base, the elastic release mechanism is released, causing the locking plate structure to move within the receiving cavity in the direction toward the conical seat, thereby generating a thrust on the conical seat. Under the action of the thrust, the slip structure expands and protrudes from the side wall of the housing to achieve anchoring, and the self-locking mechanism forms a locked state to restrict the radial movement of the slip structure along the housing.

8. The control method for the downhole setting mechanism according to claim 7, characterized in that, When the anchoring is achieved by the chock structure, the control method further includes: Upon receiving a locking signal, the card plate structure is rotated into the second slot in response to the locking signal, thereby limiting the radial and axial displacement of the conical seat along the housing.

9. A downhole setting device, characterized in that, Includes the downhole setting mechanism as described in any one of claims 1 to 6; The identification module is used to send a target signal when a preset position is identified, wherein the preset position is earlier than and close to the sealing position; The control module is electrically connected to the identification module and the sealing mechanism respectively. The control module is used to send a start signal to the sealing mechanism according to the target signal.

10. The downhole setting device according to claim 9, characterized in that, The control module is also used to send a locking signal to the setting mechanism when the slip structure of the downhole setting mechanism is anchored.

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