Guiding device for open pit coal mine drainage directional drilling hole protection
By using a guide device consisting of an upper guide cylinder, a lower guide cylinder, a centralizer and other components in directional drilling for drainage in open-pit coal mines, the problem of the steel screen pipe being unable to be pushed smoothly was solved, and the stable pushing of the steel screen pipe and the effective formation of the drainage channel were achieved.
Patent Information
- Application Number
- CN202422949057.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-12-02
AI Technical Summary
During the directional drilling process for drainage in open-pit coal mines, the steel screen pipe cannot be smoothly pushed to the pre-designed depth due to the lack of a hole-protecting guide device, resulting in the inability to effectively form a drainage channel.
A guide device including an upper guide cylinder, a lower guide cylinder, a centralizer and a fastening block is used. The steel screen pipe is fastened by the centralizer to prevent it from deflecting. The material characteristics of the double-layer structure of the guide cylinder are utilized to reduce friction and ensure smooth pushing of the steel screen pipe.
The steel screen pipe remains stable during the drilling process, avoids hitting the hole wall, ensures smooth pushing to the designed depth, and maintains the effectiveness of the drainage channel and the stability of the guide device.
Smart Images
Figure CN223410797U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of open-pit coal mining equipment, and in particular to a guide device for directional drilling and hole protection in open-pit coal mines for drainage. Background Art
[0002] There are soft rock formations in my country's open-pit coal mines. Under the long-term action of aquifer water, the soft rock formations will pose a threat to the stability of the slope. By draining the groundwater from the aquifer through directional drilling and lowering the groundwater level in the aquifer, the impact of groundwater on mining efficiency and slope stability can be effectively prevented.
[0003] Currently, when conducting directional drilling for drainage in open-pit coal mines, the drill hole location is measured using a measuring instrument and marked on-site. The directional drill rig is then activated, using a sliding directional drilling method to drill a long, directional borehole into the slope strata of the open-pit coal mine. To ensure the long-term effectiveness of the drainage channel formed by the directional drilling, a steel screen is lowered into the directional borehole to maintain the drainage channel. However, due to the inevitable unevenness of the hole wall during the drilling process and the inherent rigidity of the steel screen, the front end of the steel screen easily hits the hole wall during the pushing process, preventing the steel screen from being pushed to the pre-designed depth.
[0004] In view of this, a guide device for directional drilling and hole protection in open-pit coal mine drainage is provided to solve the above problems. Summary of the Invention
[0005] The purpose of this application is to solve the problem that the steel screen pipe cannot be pushed smoothly to the pre-designed depth due to the lack of a hole protection guide device during directional drilling for drainage in open-pit coal mines. In order to solve the above technical problems, a guide device for protecting holes in directional drilling for drainage in open-pit coal mines is provided, which can enable the steel screen pipe to be pushed smoothly to the pre-designed depth during directional drilling for drainage in open-pit coal mines.
[0006] To achieve the above-mentioned purpose, the embodiment of the present application adopts the following technical solution: a guide device for directional drilling and hole protection for drainage in open-pit coal mines, comprising: a main body; an upper guide cylinder, the upper guide cylinder is arranged at one end of the main body, and the inner diameter of the upper guide cylinder gradually decreases in the vertical direction; a lower guide cylinder, the lower guide cylinder is arranged at the other end of the main body, the lower guide cylinder and the upper guide cylinder are integrated, and the inner diameter of the lower guide cylinder is larger than the outer diameter of the steel screen pipe; a centralizer, the centralizer is arranged on the upper guide cylinder, the centralizer is engaged with the outer wall of the upper guide cylinder, one side of the centralizer is arranged in an arc shape, and an accommodating groove is provided on the surface of the centralizer, and a fastening block 1 and a fastening block 2 are provided in the accommodating groove, and the fastening block 1 is tightly fitted with the fastening block 2; after one end of the steel screen pipe enters the main body, the steel screen pipe is tightly fastened by the centralizer to prevent it from deflecting during the pushing process, thereby ensuring that the steel screen pipe can be smoothly pushed into the hole.
[0007] Furthermore, according to an embodiment of the present application, a fixing groove is provided on the upper guide cylinder, and at least two fixing grooves are provided, and the fixing grooves are symmetrically arranged.
[0008] Furthermore, according to an embodiment of the present application, a connecting piece is provided on the fixing groove, and the connecting piece is used to connect the centralizer.
[0009] Furthermore, according to an embodiment of the present application, the fastening block 1 is tightly fitted with the centralizer.
[0010] Further, according to an embodiment of the present application, the fastening block 1 is configured to be in an arc shape.
[0011] Further, according to an embodiment of the present application, the second fastening block is configured to be in a semicircular arc shape.
[0012] Furthermore, according to an embodiment of the present application, the upper guide cylinder and the lower guide cylinder are double-layer structures, the outer layers of the upper guide cylinder and the lower guide cylinder are made of alloy material, and the inner layers of the upper guide cylinder and the lower guide cylinder are made of ceramic material.
[0013] Furthermore, according to an embodiment of the present application, at least two centralizers are provided, and the two centralizers are symmetrically arranged above the center of the guide cylinder.
[0014] Further, according to an embodiment of the present application, a groove is provided at one end of the body, and one end of the groove is arc-shaped.
[0015] Further, according to an embodiment of the present application, the diameter of the lower guide cylinder is smaller than the diameter of the upper guide cylinder.
[0016] Compared with the prior art, the present application installs the guide device at the front end of the steel screen pipe and uses the centralizer to fasten the steel screen pipe to prevent it from shifting. The double-layer structure of the lower guide cylinder and the material characteristics of the upper and lower guide cylinders can not only withstand a certain pressure to prevent the borehole from collapsing, but also reduce the friction between the steel screen pipe and the guide device, which is beneficial for the steel screen pipe to remain stable during the pushing process, thereby solving the problem that the front end of the screen pipe is easily pushed against the hole wall and cannot be pushed to the designed depth when the steel screen pipe is installed in a pushing manner in the drainage drilling hole on the slope of an open-pit coal mine, thereby achieving the good effect of assisting the steel screen pipe to be smoothly pushed to the designed depth. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present application is further described below with reference to the accompanying drawings and examples.
[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a guide device for directional drilling and hole protection for drainage in an open-pit coal mine according to an embodiment of the present application.
[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the centralizer according to an embodiment of the present application.
[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting piece of the embodiment of the present application.
[0021] In the accompanying drawings: upper guide cylinder 1, lower guide cylinder 2, centralizer 10, accommodating groove 101, hole 102, fastening block 1010, fastening block 2 1011, fixing groove 11, connecting piece 110, groove 12. DETAILED DESCRIPTION
[0022] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "one," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.
[0025] For the purpose of simplicity and illustration, the principles of the embodiments are described primarily with reference to examples. In the following description, many specific details are provided to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring the understanding of these embodiments. In addition, all embodiments may be used in combination with each other.
[0026] Example 1:
[0027] like Figure 1-3 As shown, this embodiment provides a steel screen pipe guide device for open-pit coal mine slope drainage drilling, including: a main body; an upper guide cylinder 1, the upper guide cylinder 1 is arranged at one end of the main body, and the inner diameter of the upper guide cylinder 1 gradually decreases in the vertical direction; a lower guide cylinder 2, the lower guide cylinder 2 is arranged at the other end of the main body, the lower guide cylinder 2 and the upper guide cylinder 1 are integrally arranged, and the inner diameter of the lower guide cylinder 2 is larger than the outer diameter of the steel screen pipe; a centralizer 10, the centralizer 10 is arranged on the upper guide cylinder 1, the centralizer 10 is engaged with the outer wall of the upper guide cylinder 1, one side of the centralizer 10 is arranged in an arc shape, and an accommodating groove 101 is provided on the surface of the centralizer 10, and a fastening block 1010 and a fastening block 2 1011 are provided in the accommodating groove 101, and the fastening block 1010 is tightly fitted with the fastening block 2 1011; one end of the steel screen pipe enters the main body, and the steel screen pipe is fastened by using the centralizer 10 to prevent the steel screen pipe from deflecting.
[0028] The upper guide cylinder 1 is provided with at least two symmetrically arranged fixing slots 11. Connectors 110 are provided on the fixing slots 11 for connecting to the centralizer 10. The fixing slots 11 and the connectors 110 cooperate, allowing the centralizer 10 to be placed in the fixing slots 11. The connectors 110 pass through holes 102 provided on the centralizer 10, allowing the centralizer 10 to rotate along the connectors 110 within the fixing slots 11 without being thrown out. This allows the distance between the centralizers 10 to be adjusted according to the thickness of the steel screen pipe, increasing the flexibility of the guide device, helping to adapt to steel screen pipes of different specifications and better assisting in their delivery.
[0029] Fastening block 1010 fits tightly with the centralizer 10. Fastening block 1010 is configured in an arc shape. Fastening block 2 1011 is configured in a semi-circular arc shape. The arc-shaped design of fastening block 1010 can bear force evenly in all directions, while the semi-circular design of fastening block 2 1011 can withstand greater lateral force in a specific direction (such as perpendicular to its diameter). When the two work together, they can cope with complex and diverse external force situations. For example, when there are uneven forces in all directions that may be generated during the pushing process and lateral forces in a specific direction due to local changes in the hole wall in the borehole, this combination can effectively balance these forces, prevent the centralizer 10 from displacing or tilting the steel screen pipe, and keep the device in a stable position during the pushing process, preventing the steel screen pipe from shaking or shifting and hitting the hole wall, which is conducive to the smooth pushing of the steel screen pipe into the hole.
[0030] The upper guide tube 1 and the lower guide tube 2 have a double-layer structure, with the outer layer of the upper guide tube 1 and the lower guide tube 2 being made of alloy material, and the inner layer of the upper guide tube 1 and the lower guide tube 2 being made of ceramic material. During the pushing of the steel screen pipe in the drainage drilling hole on the slope of the open-pit coal mine, both the linear pushing of the steel screen pipe and the slight rotation that may occur will cause friction with the upper guide tube 1 and the lower guide tube 2. Ceramic material has extremely high hardness and wear resistance. As the inner layer of the upper and lower guide tubes 1 and the lower guide tube 2, it can effectively resist the wear caused by long-term friction of the steel screen pipe, thereby maintaining the good guiding effect on the steel screen pipe for a longer period of time, extending the service life of the upper guide tube 1 and the lower guide tube 2, and ensuring the effectiveness of the guide device throughout the pushing process. The outer layer of the alloy material provides sufficient strength and toughness for the upper guide tube 1 and the lower guide tube 2. When facing external force impacts that may occur during the drilling process (such as the impact force caused by the collapse of the hole wall, etc.), the outer layer of the alloy can withstand these forces, preventing the upper guide tube 1 and the lower guide tube 2 from breaking or deforming, ensuring the stability of the overall structure of the guide device, and providing reliable protection for the pushing of the steel screen pipe.
[0031] At least two straighteners 10 are provided, and the two straighteners 10 are symmetrically arranged above the center of the guide cylinder 1. In the operation of pushing steel screen pipes in the drainage drilling of the slope of an open-pit coal mine, the steel screen pipes are easily disturbed by various forces and deflected during the pushing process, such as the uneven resistance of the hole wall, the uneven force applied by the pushing equipment, etc. When at least two straighteners 10 are provided and the center of the guide cylinder 1 is symmetrical, the steel screen pipe can be subjected to a uniform straightening force in the circumferential direction. If the steel screen pipe is subjected to lateral force in a certain direction and tends to deflect, the symmetrically arranged straighteners 10 will apply equal force in the opposite direction, thereby ensuring that the steel screen pipe always remains in the center position and maintains good straightness, effectively preventing the front end of the steel screen pipe from hitting the hole wall due to deviation, and facilitating the smooth pushing of the steel screen pipe into the hole to the designed depth.
[0032] A groove 12 is provided at one end of the body, with one end of the groove 12 being arc-shaped. When the device is subjected to external forces in the borehole, such as changes in formation pressure or vibrations from the pushing equipment, the end with the arc-shaped groove 12 can better disperse these forces. The arc-shaped structure can distribute the external forces more evenly across the surface of the groove 12, reducing local stress concentration, extending the service life of the guide device, and ensuring that the guide device can continue to operate stably throughout the entire steel screen pushing process.
[0033] The diameter of the lower guide tube 2 is smaller than that of the upper guide tube 1. The smaller diameter of the lower guide tube 2 can, to a certain extent, reduce the downward transmission of vibration from the steel screen. When the steel screen vibrates during the pushing process, the smaller diameter of the lower guide tube 2 makes the contact and interaction between the steel screen and the tube wall more constrained, absorbing and buffering some of the vibration energy, preventing vibration from being amplified at the bottom of the borehole, thereby reducing the impact on the surrounding strata and related components such as the guide device. It also helps maintain the stability of the steel screen during pushing, preventing it from deviating from the pushing direction and hitting the hole wall due to vibration.
[0034] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.
Claims
1. A guide device for directional drilling and hole protection in open-pit coal mine drainage, characterized in that: include: ontology; an upper guide cylinder, the upper guide cylinder being arranged at one end of the body, the inner diameter of the upper guide cylinder gradually decreasing in a vertical direction; A lower guide cylinder is provided at the other end of the body, the lower guide cylinder is integrally provided with the upper guide cylinder, and the inner diameter of the lower guide cylinder is larger than the outer diameter of the steel screen tube; A centralizer, the centralizer being arranged on the upper guide cylinder and being engaged with the outer wall of the upper guide cylinder. One side of the centralizer is arranged in an arc shape. A receiving groove is provided on the surface of the centralizer. A first fastening block and a second fastening block are provided in the receiving groove. The first fastening block is tightly fitted with the second fastening block. After one end of the steel screen pipe enters the body, the centralizer is used to tightly hold the steel screen pipe to prevent it from deflecting during the pushing process, thereby ensuring that the steel screen pipe can be smoothly pushed into the hole.
2. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: The upper guide cylinder is provided with a fixing groove, at least two of which are provided and are symmetrically arranged.
3. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 2, characterized in that: A connecting piece is provided on the fixing groove, and the connecting piece is used to connect the centralizer.
4. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: The fastening block 1 is tightly fitted with the centralizer.
5. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: The fastening block 1 is configured to be in an arc shape.
6. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: The second fastening block is configured to be semicircular.
7. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: The upper guide cylinder and the lower guide cylinder are of a double-layer structure. The outer layers of the upper guide cylinder and the lower guide cylinder are made of alloy material, and the inner layers of the upper guide cylinder and the lower guide cylinder are made of ceramic material.
8. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: At least two centralizers are provided, and the two centralizers are symmetrically arranged around the center of the upper guide cylinder.
9. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: A groove is provided at one end of the body, and one end of the groove is arc-shaped.
10. The guide device for directional drilling and hole protection in open-pit coal mine drainage according to claim 1, characterized in that: The diameter of the lower guide cylinder is smaller than the diameter of the upper guide cylinder.