Anti-deviation device for guide hole drilling of raise boring machine
By adjusting the spacing of the rotating drum using an electric telescopic rod and a displacement sensor, the problem of drill pipe offset at the large dogleg position of the raise boring machine was solved, reducing equipment damage, simplifying the replacement of the rotating drum, and improving construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN JIN NING MINING CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-05-15
AI Technical Summary
Existing raise boring machines are prone to fatigue damage at the large dogleg position of the drill pipe, which leads to displacement, increases the gap between the guide hole and the drill pipe, and causes equipment damage. In addition, the support rollers need to be replaced frequently to adapt to different drill pipe diameters.
An electric telescopic rod is used to drive the moving frame and push rod to adjust the distance between the rotating drums. Automatic adjustment is achieved through displacement sensors and controllers to prevent drill rod misalignment and facilitate the replacement of worn rotating drums.
This achieves stability of the drill pipe at the large dogleg position, reduces equipment damage, simplifies the replacement process of the rotating drum, and improves construction efficiency.
Smart Images
Figure CN224244823U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of anti-deviation devices, specifically an anti-deviation device for the guide hole drilling of a reverse drilling rig. Background Technology
[0002] During the enlargement of inclined wells for water diversion, the large inclination angle of the inclined well requires high precision, and the re-drilling equipment is difficult to meet the precision requirements. Therefore, the construction scheme of "directional drilling pilot hole + re-drilling and enlargement" is generally selected. However, due to the large changes in rock strata and severe magnetic interference, the dogleg of the drill pipe is large in some areas during the directional drilling process. When the drill pipe is in a position with a large dogleg, the frictional resistance and bending of the drill pipe increase, which can easily lead to fatigue damage or even drill pipe breakage. To effectively overcome the problems caused by excessive dogleg width, the guide hole brush is enlarged and the guide hole diameter is increased during construction. However, this increases the gap between the guide hole and the drill pipe, and also increases the vibration of the drilling rig and the swing amplitude of the drill pipe. This can cause the drill pipe to deviate to varying degrees, resulting in serious oil leakage in the power head, excessive stress on the bearings and gears inside the gearbox, and the drill pipe deviating in the direction of rotation. It also makes it difficult to install the lower slips, causing great damage to the equipment and making construction difficult. An existing anti-deviation device for raised well drilling rigs (announcement number: CN214403463U) has the following disadvantages in use:
[0003] During use, two support rollers are set up and fixed to the drill rod against the wall. The housing is welded to the main frame. When the drill rod rotates, it drives the support rollers to rotate, reducing the deviation of the drill rod. However, the diameter of the support rollers needs to be selected and adjusted according to the diameter of the drill rod to ensure good contact between the drill rod and the roller surfaces of the two support rollers and maintain a good rolling fit. When using drill rods of different diameters, it is inconvenient to constantly replace the support rollers. Therefore, this patent proposes a reverse drilling rig guide hole anti-deviation device to solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to provide a reverse drilling rig guide hole anti-deviation device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a reverse drilling rig guide hole anti-deviation device, comprising a connecting frame, an electric telescopic rod fixed to the inner wall of the connecting frame, a movable frame fixed to the telescopic end of the electric telescopic rod, the movable frame being slidably connected between the top inner wall and the bottom inner wall of the connecting frame, two sliding rods being slidably connected to the top inner wall and the bottom inner wall of the connecting frame, a sliding groove being provided on the top inner wall and the bottom inner wall of the connecting frame, a sliding block being slidably connected in the sliding groove, the sliding block and the sliding rod being fixed together, a push rod being rotatably connected between the sliding rod and the movable frame, and a rotating cylinder being rotatably connected between the upper and lower sliding rods.
[0006] Preferably, a fixing rod is fixed on both the upper and lower sliding rods, a connecting sleeve is screwed to the outer wall of the fixing rod, a connecting rod is inserted into the inner wall of the rotating cylinder, the connecting sleeve is screwed to the connecting rod, and a washer is inserted into the outer wall of the connecting rod, with the washer located between the connecting sleeve and the rotating cylinder.
[0007] Preferably, the slide is T-shaped, and the slider is adapted to the slide.
[0008] Preferably, a displacement sensor is installed at the top of the slide bar.
[0009] Preferably, protective shells are fixed on both sides of the connecting frame, and protective sleeves are installed between the front of the connecting frame and the slide rod, as well as between the sides of the two slide rods that are close to each other.
[0010] Preferably, a controller is mounted on the back of the connecting frame, and the controller is electrically connected to the electric telescopic rod and the displacement sensor.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] The moving frame is driven by an electric telescopic rod, which in turn drives the push rod to move. The push rod then drives the slide bar to move to both sides, thus allowing the distance between the two rotating cylinders to be adjusted according to the drill pipe diameter. This eliminates the need to replace the rotating cylinders, making it quite convenient.
[0013] When the rotating cylinder is worn and needs to be replaced, the connecting sleeve is rotated to move away from the rotating cylinder. When the connecting sleeve disengages from the connecting rod, the connecting rod can be removed to replace the rotating cylinder. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the adjustment mechanism of this utility model;
[0016] Figure 3 This is a schematic diagram of the connecting rod structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the controller structure of this utility model.
[0018] In the diagram: 1. Connecting frame; 2. Protective shell; 3. Protective sleeve; 4. Electric telescopic rod; 5. Moving frame; 6. Slide groove; 7. Slider; 8. Slide rod; 9. Push rod; 10. Rotating cylinder; 11. Fixed rod; 12. Connecting sleeve; 13. Connecting rod; 14. Gasket; 15. Displacement sensor; 16. Controller. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] During the enlargement of inclined wells for water diversion, the large inclination angle and high precision requirements make it difficult for raise boring machines to meet these requirements. Therefore, a common approach is to use a combination of directional drilling pilot hole drilling and raise boring machine enlargement. However, due to significant changes in rock strata and severe magnetic interference, the dogleg angle can be large in some areas during directional drilling. When the drill pipe is in a position with a large dogleg angle, the frictional resistance and bending of the drill pipe increase, easily leading to drill pipe fatigue damage or even breakage. To effectively overcome the problems caused by the large dogleg angle, the pilot hole is enlarged during construction, increasing the diameter of the pilot hole. However, this increases the gap between the pilot hole and the drill pipe, increasing the vibration of the drilling rig and the swing amplitude of the drill pipe. This can cause varying degrees of drill pipe deviation, resulting in severe oil leakage in the power head, excessive stress on the bearings and gears inside the gearbox, drill pipe deflection in the direction of rotation, difficulty in installing the lower slips, and significant damage to the equipment, leading to construction difficulties. Therefore, a raise boring machine pilot hole anti-deviation device is installed to prevent drill pipe deviation.
[0021] like Figures 1-4 As shown, this utility model provides a technical solution: a reverse drilling rig guide hole anti-deviation device, used in the process of enlarging the inclined well for water diversion, including a connecting frame 1, an electric telescopic rod 4 fixed to the inner wall of the connecting frame 1, a movable frame 5 fixed to the telescopic end of the electric telescopic rod 4, the movable frame 5 being slidably connected between the inner wall of the top end and the inner wall of the bottom end of the connecting frame 1, two sliding rods 8 being slidably connected to the inner wall of the top end and the inner wall of the bottom end of the connecting frame 1, and a sliding groove 6 being provided on the inner wall of the top end and the inner wall of the bottom end of the connecting frame 1, a sliding block 7 being slidably connected in the sliding groove 6, the sliding block 7 being fixed to the sliding rod 8, a push rod 9 being rotatably connected between the sliding rod 8 and the movable frame 5, and a rotating cylinder 10 being rotatably connected between the upper and lower sliding rods 8, the sliding groove 6 being T-shaped, and the sliding block 7 being adapted to the sliding groove 6.
[0022] It should be noted that the electric telescopic rod 4 drives the moving frame 5 to move, the moving frame 5 drives the push rod 9 to move, and the push rod 9 drives the slide rod 8 to move to both sides. This allows the distance between the two rotating cylinders 10 to be adjusted according to the diameter of the drill pipe, without the need to replace the rotating cylinders 10, which is quite convenient.
[0023] like Figure 2As shown, a fixing rod 11 is fixed on both the upper and lower sliding rods 8. A connecting sleeve 12 is screwed onto the outer wall of the fixing rod 11. A connecting rod 13 is inserted into the inner wall of the rotating cylinder 10. The connecting sleeve 12 is screwed onto the connecting rod 13. A washer 14 is inserted into the outer wall of the connecting rod 13. The washer 14 is located between the connecting sleeve 12 and the rotating cylinder 10.
[0024] It should be noted that when the rotating cylinder 10 is worn and needs to be replaced, the connecting sleeve 12 is rotated to move the connecting sleeve 12 away from the rotating cylinder 10. When the connecting sleeve 12 is disengaged from the connecting rod 13, the connecting rod 13 can be removed to replace the rotating cylinder 10. The rotating cylinder 10 is limited to the outer wall of the connecting rod 13 by the connecting sleeve 12 and the gasket 14, and the rotating cylinder 10 rotates on the outer wall of the connecting rod 13.
[0025] like Figure 2 As shown, a displacement sensor 15 is installed at the top of the slide rod 8. Protective shells 2 are fixed on both sides of the connecting frame 1. Protective sleeves 3 are installed between the front of the connecting frame 1 and the slide rod 8, as well as between the sides of the two slide rods 8 that are close to each other, to prevent dust from entering the connecting frame 1 and affecting the equipment inside the connecting frame 1. A controller 16 is installed on the back of the connecting frame 1. The controller 16 is electrically connected to the electric telescopic rod 4 and the displacement sensor 15.
[0026] It should be noted that by installing a displacement sensor 15 at the top of one of the slide rods 8 and a baffle at the top of the other slide rod 8, the position of the baffle can be measured, thus determining the distance between the two rotating cylinders 10. The electric telescopic rod 4 is activated by the controller 16, which drives the two rotating cylinders 10 to adjust. When the appropriate position is reached, the displacement sensor 15 sends the detected signal to the controller 16, which then closes the electric telescopic rod 4. During use, the drill rod is positioned between the two rotating cylinders 10. When the drill rod rotates, it drives the two rotating cylinders 10 to rotate, thereby reducing the deviation of the drill rod. In this solution, the electrical components are controlled by the matching controller 16, and the control circuit can be easily programmed by those skilled in the art. This is common knowledge in the field, and it is used without modification. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.
Claims
1. A reverse drilling rig guide hole anti-deviation device, comprising a connecting frame (1), characterized in that: An electric telescopic rod (4) is fixed to the inner wall of the connecting frame (1). A movable frame (5) is fixed to the telescopic end of the electric telescopic rod (4). The movable frame (5) is slidably connected between the inner wall of the top end and the inner wall of the bottom end of the connecting frame (1). Two sliding rods (8) are slidably connected to the inner wall of the top end and the inner wall of the bottom end of the connecting frame (1). Sliding grooves (6) are opened on the inner wall of the top end and the inner wall of the bottom end of the connecting frame (1). A slider (7) is slidably connected in the sliding groove (6). The slider (7) and the sliding rod (8) are fixed together. A push rod (9) is rotatably connected between the sliding rod (8) and the movable frame (5). A rotating cylinder (10) is rotatably connected between the upper and lower sliding rods (8).
2. The anti-deviation device for guide hole drilling of a reverse drilling rig according to claim 1, characterized in that: A fixing rod (11) is fixed on each of the upper and lower sliding rods (8). A connecting sleeve (12) is screwed onto the outer wall of the fixing rod (11). A connecting rod (13) is inserted into the inner wall of the rotating cylinder (10). The connecting sleeve (12) is screwed onto the connecting rod (13). A washer (14) is inserted into the outer wall of the connecting rod (13). The washer (14) is located between the connecting sleeve (12) and the rotating cylinder (10).
3. The anti-deviation device for guide hole drilling of a reverse drilling rig according to claim 1, characterized in that: The slide (6) is T-shaped, and the slider (7) is adapted to the slide (6).
4. The anti-deviation device for guide hole drilling of a reverse drilling rig according to claim 1, characterized in that: A displacement sensor (15) is installed at the top of the slide bar (8).
5. The anti-deviation device for guide hole drilling of a reverse drilling rig according to claim 1, characterized in that: Protective shells (2) are fixed on both sides of the connecting frame (1), and protective sleeves (3) are installed between the front of the connecting frame (1) and the slide rod (8) and between the two slide rods (8) on the side that are close to each other.
6. The anti-deviation device for guide hole drilling of a reverse drilling rig according to claim 1, characterized in that: A controller (16) is installed on the back of the connecting frame (1), and the controller (16) is electrically connected to the electric telescopic rod (4) and the displacement sensor (15).