Gravel packing device for horizontal well
By designing a horizontal well gravel filling device, the automatic control of the filling port is achieved using the annular plate and spring structure, the uneven distribution problem caused by gravel reflux is solved, and the uniform filling and sand prevention effect of the gravel layer is achieved.
Patent Information
- Application Number
- CN202422627699.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In horizontal well filling operation, gravel returns to the screen pipe, resulting in uneven distribution of local gravel layers and unable to stably exert barrier effects, which is difficult to effectively solve the problem of the existing technology.
A horizontal well gravel filling device is designed, including an outer pipe, an inner pipe, a closure assembly and an opening and closing assembly. By setting up an annular plate and a spring structure, the automatic opening and closing of the filling port is realized to ensure uniform filling of the gravel.
Effectively prevent gravel backflow, ensure uniform distribution of gravel layers, stably exert the effect of sand prevention barriers, and improve filling operation efficiency.
Smart Images
Figure CN223215247U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of petroleum tools, in particular to a horizontal well gravel filling device. Background Art
[0002] A major issue faced during oil and gas field development is sand production in the wellbore. This can lead to wear and tear of surface and downhole equipment, wellbore collapse, and production reductions and shutdowns. Addressing this issue is a crucial research topic in oil and gas field development. Currently, gravel packing is one of the primary sand control methods. This involves filling the annular space between the screen and the wellbore or casing to form a gravel layer, which acts as a reliable barrier to prevent sand from forming in the formation, ultimately controlling sand production.
[0003] During the filling operation of a horizontal well, after the filling tool is pulled out of the horizontal well, gravel may flow back into the screen pipe, resulting in uneven distribution of the local gravel layer and failure to stably exert its barrier effect. Utility Model Content
[0004] The purpose of the utility model is to provide a horizontal well gravel packing device to solve the above-mentioned deficiencies in the prior art.
[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:
[0006] A horizontal well gravel filling device comprises an outer tube, wherein the outer tube is provided with a plurality of first filling ports, and the two ends of the outer tube are respectively threadedly connected with a coupling and a guide shoe; it also comprises: an inner tube, the inner tube is arranged in the outer tube, and the end of the inner tube is provided with a plurality of communicating holes; a closing assembly, the closing assembly comprises a closing platform fixedly arranged on the inner wall of the outer tube, the closing platform is provided with a slot for the inner tube to pass through, an annular plate is slidably arranged between the closing platform and the outer tube, a second filling port corresponding to the first filling port one by one is provided on the annular plate, the annular plate is adapted to the inner diameter of the outer tube, a transverse plate is also fixedly connected to the end of the annular plate, and a plurality of springs are provided between the transverse plate and the closing assembly; an opening and closing assembly, which is used to move the annular plate so that the first filling port and the second filling port are connected or closed.
[0007] Furthermore, the opening and closing assembly includes a first inclined plate fixedly connected to the horizontal plate, a plurality of sliders are slidably connected to the closing platform, a second inclined plate corresponding to the first inclined plate is fixedly provided at one end of the slider close to the first inclined plate, and the plurality of sliders are arranged in a circular array in the slot.
[0008] Furthermore, a first inclined surface is fixedly provided on one end of each sliding block away from the first inclined plate, and the first inclined surface faces a direction away from the guide shoe; a guide head is provided at the end of the inner tube, and the guide head is arranged in an arc shape.
[0009] Furthermore, a plurality of grooves are provided on the slot on the closing platform, and a sealing ring is provided in each of the grooves.
[0010] Furthermore, a baffle is fixedly provided on the inner tube, and when the baffle abuts against the closing platform, the inner tube is inserted into the outer tube.
[0011] In the above technical solution, the horizontal well gravel packing device provided by the utility model has the following beneficial effects:
[0012] By means of the provided closing assembly, when the inner tube is not inserted into the outer tube, the first filling port on the outer tube is blocked and covered by the annular plate, thereby preventing the backflow of gravel; and, when the inner tube is inserted into the outer tube, the provided opening and closing assembly can automatically move the annular plate, so that the first filling port and the second filling port are connected, facilitating the filling operation.
[0013] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
[0014] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0016] Figure 1 A schematic diagram of the cross-sectional structure of the outer tube provided in an embodiment of the utility model;
[0017] Figure 2 A schematic diagram of the cross-sectional structure of the inner tube provided in an embodiment of the present utility model;
[0018] Figure 3 A schematic diagram of a partially enlarged structure provided by an embodiment of the utility model;
[0019] Figure 4 A schematic diagram of the annular plate structure provided in an embodiment of the present utility model.
[0020] Description of reference numerals:
[0021] 1. Outer tube; 11. First filling port; 2. Inner tube; 21. Connecting hole; 22. Guide head; 3. Closing assembly; 31. Closing platform; 32. Slot; 33. Annular plate; 34. Second filling port; 35. Horizontal plate; 36. Spring; 4. Opening and closing assembly; 41. First inclined plate; 42. Slider; 43. Second inclined plate; 44. First inclined surface; 5. Sealing ring; 6. Baffle. DETAILED DESCRIPTION
[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0023] See also Figure 1-4 , a horizontal well gravel packing device comprises an outer tube 1, the outer tube 1 is provided with a plurality of first filling ports 11, and the two ends of the outer tube 1 are respectively threadedly connected with a coupling and a guide shoe; it also comprises: an inner tube 2, the inner tube 2 is arranged in the outer tube 1, and the end of the inner tube 2 is provided with a plurality of communicating holes 21; a closing component 3, the closing component 3 comprises a closing platform 31 fixedly arranged on the inner wall of the outer tube 1, the closing platform 31 is provided with a slot 32 for the inner tube 2 to pass through, an annular plate 33 is slidably arranged between the closing platform 31 and the outer tube 1, and the annular plate 33 is provided with a second filling port 34 corresponding to the first filling port 11, the annular plate 33 is adapted to the inner diameter of the outer tube 1, and the end of the annular plate 33 is also fixedly connected to a transverse plate 35, and a plurality of springs 36 are provided between the transverse plate 35 and the closing platform 31; an opening and closing component 4, which is used to move the annular plate 33 to connect or close the first filling port 11 and the second filling port 34.
[0024] When the inner tube 2 is not inserted into the outer tube 1, the first filling port 11 on the outer tube 1 is blocked and covered by the annular plate 33, thereby preventing the backflow of gravel; and when the inner tube 2 is inserted into the outer tube 1, the annular plate 33 can be automatically moved by the opening and closing component 4, so that the first filling port 11 and the second filling port 34 are connected to facilitate the filling operation.
[0025] Furthermore, the opening and closing assembly 4 includes a first inclined plate 41 fixedly connected to the horizontal plate 35. A plurality of sliders 42 are slidably connected to the closing platform 31. A second inclined plate 43 corresponding to the first inclined plate 41 is fixedly mounted on the end of the slider 42 adjacent to the first inclined plate 41. The plurality of sliders 42 are arranged in a circular array within the slot 32. A first inclined surface 44 is fixedly mounted on the end of each slider 42 away from the first inclined plate 41. The first inclined surface 44 faces away from the guide shoe. A guide head 22 is provided at the end of the inner tube 2. The guide head 22 is arranged in an arc shape.
[0026] During the process of inserting the inner tube 2 into the outer tube 1, the guide head 22 moves to abut against the slider 42, and the slider 42 moves toward the first inclined plate 41 through the first inclined surface 44. The second inclined plate 43 at the other end of the slider 42 cooperates with the first inclined plate 41 to make the cross plate 35 compress the spring 36 and drive the annular plate to move until the first filling port 11 and the second filling port 34 are connected to facilitate the filling operation; when the inner tube 2 is pulled out of the outer tube 1, under the action of the spring 36, the annular plate and the slider 42 are reset, so that the first filling port 11 and the second filling port 34 are misaligned.
[0027] Furthermore, the slot 32 on the closing platform 31 is provided with a plurality of grooves, each of which is provided with a sealing ring 5. When the inner tube 2 is inserted into the outer tube 1, the sealing ring 5 can be used to seal the inner tube 2 and the closing platform 31, so as to improve the filling effect.
[0028] Furthermore, a baffle 6 is fixedly mounted on the inner tube 2. When the baffle 6 abuts the sealing platform 31, the inner tube 2 is inserted into the outer tube 1. Since the horizontal well is located underground, it is difficult to observe the insertion position of the inner tube 2. When the baffle 6 abuts the sealing platform 31, it means that the inner tube 2 has been fully inserted into the outer tube 1 to the designed position.
[0029] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A horizontal well gravel packing device, comprising an outer tube (1), wherein the outer tube (1) is provided with a plurality of first filling ports (11), and the outer tube (1) is threadedly connected to a coupling and a guide shoe at both ends; characterized in that: Also includes: An inner tube (2), the inner tube (2) being arranged inside the outer tube (1), and a plurality of communication holes (21) being formed at an end of the inner tube (2); A sealing assembly (3), comprising a sealing platform (31) fixedly arranged on the inner wall of the outer tube (1), a slot (32) for the inner tube (2) to pass through the sealing platform (31), an annular plate (33) slidably arranged between the sealing platform (31) and the outer tube (1), a second filling port (34) corresponding to the first filling port (11) being arranged on the annular plate (33), the annular plate (33) being adapted to the inner diameter of the outer tube (1), a transverse plate (35) being fixedly connected to the end of the annular plate (33), and a plurality of springs (36) being arranged between the transverse plate (35) and the sealing platform (31); The opening and closing assembly (4) is used to move the annular plate (33) so as to connect or close the first filling port (11) and the second filling port (34).
2. A horizontal well gravel packing device according to claim 1, characterized in that: The opening and closing assembly (4) comprises a first inclined plate (41) fixedly connected to the transverse plate (35); a plurality of sliders (42) are slidably connected to the closing platform (31); a second inclined plate (43) corresponding to the first inclined plate (41) is fixedly provided at one end of the slider (42) close to the first inclined plate (41); and the plurality of sliders (42) are arranged in a circular array in the slot (32).
3. A horizontal well gravel packing device according to claim 2, characterized in that: A first inclined surface (44) is fixedly provided at one end of each slider (42) away from the first inclined plate (41), and the first inclined surface (44) faces in a direction away from the guide shoe; a guide head (22) is provided at the end of the inner tube (2), and the guide head (22) is arranged in an arc shape.
4. A horizontal well gravel packing device according to claim 1, characterized in that: The slot (32) on the closing platform (31) is provided with a plurality of grooves, and a sealing ring (5) is provided in each of the grooves.
5. A horizontal well gravel packing device according to claim 1, characterized in that: A baffle (6) is fixedly provided on the inner tube (2), and when the baffle (6) abuts against the closing platform (31), the inner tube (2) is inserted into the outer tube (1).