A sand cleaning device for a wellbore with buffer protection

Abstract

The utility model provides a kind of wellbore sand cleaning device with buffer protection belongs to petroleum and natural gas drilling downhole operation tool technical field, including connecting port, fixedly installed the outer sleeve of connecting port surface, the buffer assembly of being arranged in the inner chamber of outer sleeve, fixedly connected in the pivot of buffer assembly end part, the impact component of being arranged in the pivot surface, and fixedly connected in the sand cleaning head of pivot end part.The utility model uses the mutual cooperation of baffle and inner tube, realizes the damping force of adjusting buffer device by adjusting the position of inner tube surface oil hole;The mutual cooperation of pivot and impact component, realized under the centrifugal force generated by pivot rotation and extended, high frequency, low amplitude hammering to compacted sand bed, crushing effect, spiral blade rotates, sand is transported upwards, while the sand body around well wall is gathered to center, device operation is simple and efficient, effectively solve the problem such as traditional sand cleaning device single function, without buffer protection mechanism.

Description

Technical Field

[0001] This utility model belongs to the technical field of downhole operation tools for oil and gas drilling, specifically relating to a drilling well sand removal device with buffer protection. Background Technology

[0002] In oil and gas drilling and workover operations, wellbore sand removal is a crucial step in ensuring unobstructed wells and the safety of subsequent operations. Traditional sand removal technologies have evolved from simple mechanical sand removal and hydraulic flushing to combined tools, and are widely used in post-drilling cleaning, workover preparation, and formation maintenance. These technologies aim to effectively remove solid particles such as drill cuttings and fracturing sand deposited at the bottom of the well, providing a clean wellbore environment for drilling, logging, and completion operations.

[0003] In existing technologies, drilling wellbore sand cleaning operations often employ rigidly connected sand retrieval or flushing tools. These tools lack effective buffer protection mechanisms, and during the lowering process, they are prone to severe impacts due to sudden contact with the bottom sand surface or obstacles, leading to tool damage or downhole accidents. Traditional sand cleaning devices have limited functionality, relying solely on hydraulic flushing or simple mechanical retrieval, resulting in low sand cleaning efficiency, especially ineffective treatment of compacted sand beds. They are prone to causing localized erosion in the wellbore rather than comprehensive cleaning, and the high-speed rotating hard components pose a risk of damaging the casing or wellbore. They also have poor adaptability to complex well conditions. Therefore, a drilling wellbore sand cleaning device with buffer protection has emerged. Utility Model Content

[0004] The purpose of this invention is to provide a drilling wellbore sand removal device with buffer protection, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A drilling wellbore sand removal device with buffer protection, comprising,

[0007] The components include a connector, an outer sleeve fixedly mounted on the surface of the connector, a buffer assembly disposed in the inner cavity of the outer sleeve, a rotating shaft fixedly connected to the end of the buffer assembly, an impact assembly disposed on the surface of the rotating shaft, and a sand cleaning head fixedly connected to the end of the rotating shaft.

[0008] The buffer assembly includes a main body fixedly installed on the surface of the connection port, an inner tube rotatably connected to the inner wall of the main body, a baffle slidably connected to the surface of the inner tube, a spring fixedly connected to the surface of the connection port, a piston slidably connected to the inner wall of the inner tube, and a piston rod fixedly connected to the surface of the piston.

[0009] As a preferred embodiment of the present invention, the buffer assembly further includes an inner sleeve fixedly installed at the end of the piston rod, and a connecting member disposed on the surface of the inner sleeve.

[0010] In a preferred embodiment of this utility model, the inner sleeve is slidably connected to the inner wall of the outer sleeve, and an oil drain hole is provided on the side wall of the inner tube.

[0011] In a preferred embodiment of this invention, the top end of the spring is fixedly connected to the surface of the piston, and the inner cavity of the inner tube is provided with hydraulic oil.

[0012] As a preferred embodiment of the present invention, the impact assembly includes a return spring fixedly connected to the inner wall of the rotating shaft, and a helical blade disposed on the surface of the rotating shaft.

[0013] As a preferred embodiment of the present invention, the impact assembly further includes a top plate fixedly connected to the end of the return spring, and a top rod fixedly installed on the surface of the top plate.

[0014] As a preferred embodiment of this utility model, the impact assembly further includes a limiting plate fixedly installed on the inner wall of the spiral blade, and an impact head fixedly connected to the end of the top rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the baffle and the inner tube work together to adjust the damping force of the buffer device by adjusting the position of the oil drain hole on the surface of the inner tube; the rotating shaft and the impact component work together to extend under the action of centrifugal force generated by the rotation of the rotating shaft to perform high-frequency, low-amplitude hammering on the compacted sand bed, resulting in a crushing effect; the rotating spiral blades transport the sand upwards and simultaneously gather the sand around the well wall towards the center. The device is simple to operate, efficient and effective in solving the problems of the traditional sand cleaning device having a single function and lacking a buffer protection mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 3This is a schematic diagram of the buffer component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the impact component structure of this utility model.

[0021] In the diagram: 101, Connection port; 102, Outer sleeve; 103, Buffer assembly; 104, Rotating shaft; 105, Impact assembly; 106, Sand removal head; 103a, Main body; 103b, Inner tube; 103c, Baffle; 103d, Spring; 103e, Piston; 103f, Piston rod; 103g, Inner sleeve; 103h, Connector; 105a, Return spring; 105b, Spiral blade; 105c, Top plate; 105d, Top rod; 105e, Limiting plate; 105f, Impact head. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Example

[0025] Reference Figures 1-4 This is the first embodiment of the present invention, which provides a drilling wellbore sand removal device with buffer protection, comprising:

[0026] The components include a connection port 101, an outer sleeve 102 fixedly installed on the surface of the connection port 101, a buffer assembly 103 disposed in the inner cavity of the outer sleeve 102, a rotating shaft 104 fixedly connected to the end of the buffer assembly 103, an impact assembly 105 disposed on the surface of the rotating shaft 104, and a sand cleaning head 106 fixedly connected to the end of the rotating shaft 104.

[0027] The buffer assembly 103 includes a main body 103a fixedly installed on the surface of the connection port 101, an inner tube 103b rotatably connected to the inner wall of the main body 103a, a baffle 103c slidably connected to the surface of the inner tube 103b, a spring 103d fixedly connected to the surface of the connection port 101, a piston 103e slidably connected to the inner wall of the inner tube 103b, and a piston rod fixedly connected to the surface of the piston 103e.

[0028] Specifically, the buffer assembly 103 also includes an inner sleeve 103g fixedly installed at the end of the piston 103e rod, and a connector 103h disposed on the surface of the inner sleeve 103g.

[0029] Furthermore, the inner sleeve 103g is slidably connected to the inner wall of the outer sleeve 102, the side wall of the inner tube 103b is provided with an oil drain hole, the top end of the spring 103d is fixedly connected to the surface of the piston 103e, and the inner cavity of the inner tube 103b is provided with hydraulic oil.

[0030] In this process, the inner sleeve 103g presses the piston 103e rod, causing the piston 103e to press the hydraulic oil from the oil drain hole to the top of the piston 103e. Rotating the inner tube 103b adjusts the position of the oil drain hole so that the baffle 103c blocks the oil drain hole, thereby adjusting the damping force of the buffer assembly 103. The spring 103d can push the piston 103e to reset. When the sand cleaning head 106 contacts the sand surface, the axial impact force is absorbed by the buffer assembly 103, and the tool decelerates smoothly, avoiding hard collisions.

[0031] Preferably, the impact assembly 105 includes a return spring 105a fixedly connected to the inner wall of the rotating shaft 104, a spiral blade 105b disposed on the surface of the rotating shaft 104, a top plate 105c fixedly connected to the end of the return spring 105a, a push rod 105d fixedly installed on the surface of the top plate 105c, a limiting plate 105e fixedly installed on the inner wall of the spiral blade 105b, and an impact head 105f fixedly connected to the end of the push rod 105d.

[0032] It should be noted that the side wall of the spiral blade 105b is provided with holes adapted to the installation of the impact head 105f. The top plate 105c is slidably connected to the inner wall of the spiral blade 105b, and the push rod 105d is slidably connected to the inner wall of the limiting plate 105e. It extends under the action of centrifugal force generated by the rotation of the rotating shaft 104 to perform high-frequency, low-amplitude hammering on the compacted sand bed, achieving a crushing effect. The spiral blade 105b rotates, conveying the sand upwards and simultaneously gathering the sand around the well wall towards the center. When the rotation stops, the spring 103d pulls the top plate 105c, and the top plate 105c pulls the impact head 105f to reset via the push rod 105d.

[0033] In use, the inner sleeve 103g presses the piston 103e rod, causing the piston 103e to press hydraulic oil from the drain hole to above the piston 103e. Rotating the inner tube 103b adjusts the position of the drain hole so that the baffle 103c blocks the drain hole, thereby adjusting the damping force of the buffer assembly 103. The spring 103d can push the piston 103e to reset. When the sand cleaning head 106 contacts the sand surface, the axial impact force is absorbed by the buffer assembly 103, and the tool decelerates smoothly, avoiding hard collisions. It extends under the action of centrifugal force generated by the rotation of the shaft 104, and performs high-frequency, low-amplitude hammering on the compacted sand bed, achieving a crushing effect. The spiral blade 105b rotates, conveying the sand upward and simultaneously gathering the sand around the well wall towards the center. When the rotation stops, the spring 103d pulls the top plate 105c, and the top plate 105c pulls the impact head 105f to reset via the push rod 105d.

[0034] In summary, the coordinated use of the rotating shaft 104 and the impact assembly 105 enables the shaft to extend under the centrifugal force generated by its rotation, thereby delivering a high-frequency, low-amplitude hammering effect to the compacted sand bed, achieving a crushing effect. The rotating spiral blades 105b transport the settled sand upwards and simultaneously gather the sand around the well wall towards the center. The device is simple to operate, highly efficient, and effectively solves the problems of traditional sand cleaning devices having limited functions and lacking a buffer protection mechanism.

[0035] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0036] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0037] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A drilling well sand removal device with buffer protection, characterized in that: include, The connector (101), the outer sleeve (102) fixedly installed on the surface of the connector (101), the buffer assembly (103) disposed in the inner cavity of the outer sleeve (102), the rotating shaft (104) fixedly connected to the end of the buffer assembly (103), the impact assembly (105) disposed on the surface of the rotating shaft (104), and the sand cleaning head (106) fixedly connected to the end of the rotating shaft (104). The buffer assembly (103) includes a main body (103a) fixedly installed on the surface of the connection port (101), an inner tube (103b) rotatably connected to the inner wall of the main body (103a), a baffle (103c) slidably connected to the surface of the inner tube (103b), a spring (103d) fixedly connected to the surface of the connection port (101), a piston (103e) slidably connected to the inner wall of the inner tube (103b), and a piston (103e) rod fixedly connected to the surface of the piston (103e).

2. The wellbore sand removal device with buffer protection according to claim 1, characterized in that: The buffer assembly (103) also includes an inner sleeve (103g) fixedly installed at the end of the piston (103e) rod, and a connector (103h) disposed on the surface of the inner sleeve (103g).

3. A drilling wellbore sand removal device with buffer protection according to claim 2, characterized in that: The inner sleeve (103g) is slidably connected to the inner wall of the outer sleeve (102), and the side wall of the inner tube (103b) is provided with an oil drain hole.

4. A drilling wellbore sand removal device with buffer protection according to claim 3, characterized in that: The top end of the spring (103d) is fixedly connected to the surface of the piston (103e), and the inner cavity of the inner tube (103b) is filled with hydraulic oil.

5. A drilling wellbore sand removal device with buffer protection according to claim 4, characterized in that: The impact assembly (105) includes a return spring (105a) fixedly connected to the inner wall of the shaft (104) and a helical blade (105b) disposed on the surface of the shaft (104).

6. A drilling wellbore sand removal device with buffer protection according to claim 5, characterized in that: The impact assembly (105) also includes a top plate (105c) fixedly connected to the end of the return spring (105a), and a top rod (105d) fixedly mounted on the surface of the top plate (105c).

7. A drilling wellbore sand removal device with buffer protection according to claim 6, characterized in that: The impact assembly (105) also includes a limiting plate (105e) fixedly installed on the inner wall of the spiral blade (105b), and an impact head (105f) fixedly connected to the end of the top rod (105d).

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