Variable-diameter stabilizer for drilling

Abstract

The variable-diameter stabilizer for drilling comprises a middle sleeve, a telescopic mechanism is arranged on the middle sleeve, and the telescopic mechanism comprises a plurality of guide rods, a telescopic sleeve, a lead screw, a limiting disc, a rotating rod, a fixing sleeve, an adjusting mechanism, a sliding mechanism and a friction block. The multiple guide rods are installed at the corresponding positions respectively, the guide rods are connected to the middle sleeve, the telescopic sleeve is installed on the side wall of the middle sleeve, the lead screw is connected to the telescopic sleeve in a threaded mode, the rotating rod is installed on the limiting disc, the rotating rod is rotationally connected to the lead screw, and the limiting disc is installed on the middle sleeve. A user can adjust the position of the middle sleeve according to needs, and the stability and reliability of the middle sleeve in the adjusting process are ensured through the interaction of the lead screw and the rotating rod.

Description

Technical Field

[0001] The utility model relates to the technical field of variable-diameter stabilizers for drilling, and more specifically, it relates to a variable-diameter stabilizer for drilling. Background Art

[0002] In the existing technology, the stabilizer for drilling is an indispensable device in the drilling operation, and its main function is to limit and stabilize the drill bit to ensure the smooth progress of the drilling process. However, there are certain limitations in the existing stabilizer for drilling during use, especially in terms of limiting and stabilizing.

[0003] First of all, the existing stabilizer for drilling can only limit the position at a fixed height in terms of limiting and stabilizing. This means that when the drilling operation encounters formations at different depths, the stabilizer cannot adjust the limiting height according to actual needs, thus affecting the use effect. For example, during the drilling process, complex geological conditions such as uneven hardness and softness, and fault zones may be encountered. At this time, it is necessary to adjust the limiting height of the drill bit according to the actual situation to ensure the smooth progress of the drilling process. However, the existing stabilizer cannot meet this requirement, resulting in the impact on the efficiency and quality of the drilling operation. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the problems existing in the prior art, the utility model provides a variable-diameter stabilizer for drilling to solve the technical problems mentioned in the background art.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: a variable-diameter stabilizer for drilling, including an intermediate sleeve, on which a telescopic mechanism is provided. The telescopic mechanism includes a guide rod, a telescopic sleeve, a lead screw, a limit disk, a rotating rod, a fixed sleeve, an adjusting mechanism, a sliding mechanism and a friction block. There are multiple guide rods, and the multiple guide rods are respectively installed in corresponding positions and are connected to the intermediate sleeve. The telescopic sleeve is installed on the side wall of the intermediate sleeve. The lead screw is threadedly connected to the telescopic sleeve. The rotating rod is installed on the limit disk and is rotatably connected to the lead screw. The limit disk is installed on the intermediate sleeve. The adjusting mechanism and the sliding mechanism are respectively installed on the fixed sleeve. The friction block is attached to the side wall of the guide rod.

[0008] The utility model is further arranged such that there are multiple friction blocks, and multiple friction grooves are respectively provided on the multiple friction blocks, and the friction grooves abut against the side wall of the intermediate rod. This design increases the contact area between the friction block and the intermediate rod, and improves the stability and reliability of the stabilizer during the adjustment process.

[0009] The present utility model is further configured such that the sliding mechanism includes a slider and a pushing spring. A plurality of shrinking grooves are symmetrically formed on the inner wall of the fixed sleeve. The slider is mounted on the side wall of the friction block, and the slider is slidably connected in the shrinking groove. The two ends of the pushing spring are respectively connected to the two friction blocks. This design of the sliding mechanism enables the slider to be pushed by the pushing spring during the sliding process, improving the sliding performance and stability of the slider.

[0010] The present utility model is further configured such that a limiting groove is formed on the side wall of the fixed sleeve, and a limiting plate is provided on the slider. The limiting plate is slidably connected in the limiting groove. This design of the limiting mechanism enables the slider to be restricted by the limiting plate during the sliding process, improving the positioning accuracy and stability of the slider.

[0011] The present utility model is further configured such that the adjusting mechanism includes a spring and a threaded plate. A plurality of springs are provided, and the plurality of springs are respectively mounted on the friction blocks. A threaded plate is mounted on each two springs. This design of the adjusting mechanism enables the threaded plate to be pushed by the spring during the adjusting process, improving the adjusting performance and stability of the threaded plate.

[0012] The present utility model is further configured such that an adjusting sleeve is attached to the vertically symmetric plurality of threaded plates. Threaded strips are provided on the inner wall of the threaded sleeve, and the threaded strips are threadedly connected to the threaded plates. This design of the adjusting sleeve enables the adjusting sleeve to be pushed by the threaded strips during the adjusting process, improving the adjusting performance and stability of the adjusting sleeve.

[0013] The present utility model is further configured such that rotating sleeves are respectively provided at both ends of the adjusting sleeve, and a hexagonal section is provided at the middle position of the adjusting sleeve. This design of the rotating sleeve and the hexagonal section enables the adjusting sleeve to be rotated by the rotating sleeve and fixed by the hexagonal section during the adjusting process, improving the adjusting performance and stability of the adjusting sleeve.

[0014] The present utility model is further configured such that handles are respectively provided on the plurality of lead screws. This design of the handles enables users to conveniently operate the lead screws, improving the adjusting performance and operability of the lead screws.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a variable-diameter stabilizer for drilling, having the following beneficial effects:

[0017] 1. The telescopic mechanism realizes the position adjustment and fixation of the middle sleeve of the stabilizer for drilling through the cooperation of the guide rod, telescopic sleeve, lead screw, limit disc, rotating rod and fixed sleeve. The guide rod is connected to the middle sleeve, the telescopic sleeve is installed on the side wall of the middle sleeve, the lead screw is threadedly connected to the telescopic sleeve, the rotating rod is installed on the limit disc, the rotating rod is rotatably connected to the lead screw, and the limit disc is installed on the middle sleeve. The use of this telescopic mechanism enables users to adjust the position of the middle sleeve as needed, and through the interaction of the lead screw and the rotating rod, ensures the stability and reliability of the middle sleeve during the adjustment process.

[0018] 2. The sliding mechanism realizes the sliding and fixation of the stabilizer for drilling during the adjustment process through the cooperation of the slider and the push spring. The slider is installed on the side wall of the friction block, the slider is slidably connected in the contraction groove, and both ends of the push spring are respectively connected to the two friction blocks. The use of this sliding mechanism enables users to adjust the position of the slider as needed, ensuring the continuous fixation of the drill bit.

[0019] 3. The adjustment mechanism realizes the precise control of the stabilizer for drilling during the adjustment process through the cooperation of the spring and the threaded plate. The spring is installed on the friction block, the threaded plates are respectively installed on every two springs, the threaded plates are respectively threadedly connected to the threaded bars, the two ends of the adjusting sleeve are respectively provided with rotating sleeves, and the middle position of the adjusting sleeve is provided with a hexagonal section. The use of this adjustment mechanism enables users to adjust the position of the threaded plate as needed, and through the interaction of the spring and the threaded plate, ensures the accuracy and stability of the threaded plate during the adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of a variable-diameter stabilizer for drilling in the present utility model;

[0021] Figure 2 is the structural schematic diagram of the limit plate in the present utility model;

[0022] Figure 3 is the structural schematic diagram of the adjustment mechanism in the present utility model;

[0023] Figure 4 is the cross-sectional structural schematic diagram of the fixed sleeve in the present utility model;

[0024] Figure 5 is the structural schematic diagram of the friction block and the push spring in the present utility model.

[0025] In the figure: 1. Intermediate sleeve; 2. Guide rod; 3. Telescopic sleeve; 4. Lead screw; 5. Limit disc; 6. Rotating rod; 7. Fixed sleeve; 8. Friction block; 9. Friction groove; 10. Slide block; 11. Push spring; 12. Shrinkage groove; 13. Limit groove; 14. Limit plate; 15. Spring; 16. Threaded plate; 17. Adjusting sleeve; 18. Threaded strip; 19. Rotating sleeve; 20. Hexagonal section; 21. Handle. Detailed implementation manner

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present invention in detail with reference to the drawings and in combination with the embodiments.

[0027] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0028] In the present invention, without contrary description, the orientations such as "upper, lower" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left, right" are usually in the left and right shown in the drawings; "inside, outside" refer to the inside and outside relative to the contours of the respective components, but the above orientation terms do not limit the present invention.

[0029] Please refer to Figures 1-5, A variable-diameter stabilizer for drilling, including an intermediate sleeve 1. An expansion mechanism is provided on the intermediate sleeve 1. The expansion mechanism includes guide rods 2, expansion sleeves 3, lead screws 4, limit discs 5, rotating rods 6, fixed sleeves 7, an adjustment mechanism, a sliding mechanism, and friction blocks 8. There are multiple guide rods 2, and the multiple guide rods 2 are respectively installed at corresponding positions. The guide rods 2 are connected to the intermediate sleeve 1. The expansion sleeve 3 is installed on the side wall of the intermediate sleeve 1. The lead screw 4 is threadedly connected to the expansion sleeve 3. The rotating rod 6 is installed on the limit disc 5, and the rotating rod 6 is rotatably connected to the lead screw 4. The limit disc 5 is installed on the intermediate sleeve 1. The adjustment mechanism and the sliding mechanism are respectively installed on the fixed sleeve 7. The friction blocks 8 are attached to the side walls of the guide rods 2. There are multiple friction blocks 8, and multiple friction grooves 9 are respectively formed on the multiple friction blocks 8. The friction grooves 9 abut against the side wall of the intermediate rod. The sliding mechanism includes a slider 10 and a push spring 11. Multiple contraction grooves 12 are symmetrically formed on the inner wall of the fixed sleeve 7. The slider 10 is installed on the side wall of the friction block 8, and the slider 10 is slidably connected in the contraction groove 12. The two ends of the push spring 11 are respectively connected to the two friction blocks 8. A limit groove 13 is formed on the side wall of the fixed sleeve 7. A limit plate 14 is provided on the slider 10, and the limit plate 14 is slidably connected in the limit groove 13. The adjustment mechanism includes springs 15 and threaded plates 16. There are multiple springs 15, and the multiple springs 15 are respectively installed on the friction blocks 8. The threaded plates 16 are respectively installed on every two springs 15. An adjustment sleeve 17 is attached to the upper and lower symmetric multiple threaded plates 16. Threaded strips 18 are provided on the inner wall of the threaded sleeve, and the threaded strips 18 are threadedly connected to the threaded plates 16. Rotating sleeves 19 are respectively provided at both ends of the adjustment sleeve 17, and a hexagonal section 20 is provided at the middle position of the adjustment sleeve 17. Handles 21 are respectively provided on the multiple lead screws 4.

[0030] In this embodiment, when it is necessary to adjust the position of the intermediate sleeve 1 according to the situation to change the stable position of the drill bit, first move the intermediate sleeve 1 to the corresponding height, and then rotate the rotating sleeve 19 to drive the rotation of the adjustment sleeve 17. The threaded plates 16 are respectively threadedly connected to the threaded strips 18, so the slider 10 can be driven to slide along the contraction groove 12. When the multiple sliders 10 approach each other, they will be in the contraction process, and then the friction blocks 8 will abut against the guide rods 2, so the intermediate sleeve 1 will be fixed. At this time, the upper and lower friction blocks 8 respectively abut against the guide rods 2. At this time, no matter which direction the intermediate sleeve 1 slides, it will be fixed by the self-locked sliders 10, so the stability of the fixation is ensured.

[0031] More specifically, after the height adjustment is completed, the corresponding limit disc 5 is replaced according to the diameter of the drill bit, and then the rotating rod 6 is inserted onto the lead screw 4. By turning the handle 21, the lead screw 4 can be driven to move along the telescopic sleeve 3, so that the limit disc 5 fits against the side wall of the drill bit, completing the limiting process. Furthermore, the drill bit can be limited at different heights according to different situations and drill bits with different diameters can also be fixed, thus completing the usage process.

[0032] In summary, when the overall device is in use or operation: when it is necessary to adjust the position of the intermediate sleeve 1 according to the situation to change the stable position of the drill bit, first move the intermediate sleeve 1 to the corresponding height, and then by turning the rotating sleeve 19, the rotation of the adjusting sleeve 17 can be driven. The threaded plates 16 are respectively threadedly connected to the threaded bars 18, so the slider 10 can be driven to slide along the contraction groove 12. When multiple sliders 10 approach each other, it is in the contraction process, and then the friction blocks 8 are made to abut against the guide rod 2, so the intermediate sleeve 1 is fixed. At this time, the upper and lower friction blocks 8 respectively abut against the guide rod 2. At this time, no matter which direction the intermediate sleeve 1 slides, it will be fixed by the self-locked sliders 10, so the stability of the fixation is ensured. After the height adjustment is completed, the corresponding limit disc 5 is replaced according to the diameter of the drill bit, and then the rotating rod 6 is inserted onto the lead screw 4. By turning the handle 21, the lead screw 4 can be driven to move along the telescopic sleeve 3, so that the limit disc 5 fits against the side wall of the drill bit, completing the limiting process. Furthermore, the drill bit can be limited at different heights according to different situations and drill bits with different diameters can also be fixed, thus completing the usage process.

[0033] In all the above-mentioned solutions, for the connection between two components, welding, the cooperation connection of bolts and nuts, bolt or screw connection or other well-known connection methods can be selected according to the actual situation, which will not be elaborated one by one here. For all the above-mentioned cases involving fixed connection, welding is preferably considered. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable diameter stabilizer for drilling, comprising an intermediate sleeve (1), characterized in that: The intermediate sleeve (1) is provided with a telescopic mechanism, which comprises a guide rod (2), a telescopic sleeve (3), a lead screw (4), a limit plate (5), a rotating rod (6), a fixed sleeve (7), an adjustment mechanism, a sliding mechanism and a friction block (8). A plurality of guide rods (2) are provided, and the plurality of guide rods (2) are respectively installed at corresponding positions. The guide rod (2) is connected to the intermediate sleeve (1), the telescopic sleeve (3) is installed on the side wall of the intermediate sleeve (1), the lead screw (4) is threadedly connected to the telescopic sleeve (3), a rotating rod (6) is concealed on the limit plate (5), the rotating rod (6) is rotatably connected to the lead screw (4), the limit plate (5) is installed on the intermediate sleeve (1), the adjustment mechanism and the sliding mechanism are respectively installed on the fixed sleeve (7), and the friction block (8) is attached to the side wall of the guide rod (2).

2. The variable diameter stabilizer for drilling according to claim 1, characterized in that: A plurality of friction blocks (8) are provided, and each of the plurality of friction blocks (8) is provided with a friction groove (9), and the friction groove (9) abuts against the side wall of the middle rod.

3. The variable diameter stabilizer for drilling according to claim 2, characterized in that: The sliding mechanism comprises a slider (10) and a push spring (11); a plurality of contraction grooves (12) are symmetrically provided on the inner wall of the fixed sleeve (7); the slider (10) is mounted on the side wall of the friction block (8); the slider (10) is slidably connected in the contraction groove (12); and the two ends of the push spring (11) are respectively connected to the two friction blocks (8).

4. The variable diameter stabilizer for drilling according to claim 3 is characterized by: A limiting groove (13) is provided on the side wall of the fixing sleeve (7), and a limiting plate (14) is provided on the sliding block (10), and the limiting plate (14) is slidably connected in the limiting groove (13).

5. The variable diameter stabilizer for drilling according to claim 1, characterized in that: The adjustment mechanism comprises a spring (15) and a threaded plate (16). A plurality of the springs (15) are provided, and the plurality of springs (15) are respectively mounted on the friction block (8), and a threaded plate (16) is respectively mounted on every two of the springs (15).

6. The variable diameter stabilizer for drilling according to claim 5, characterized in that: An adjusting sleeve (17) is fitted on a plurality of threaded plates (16) that are symmetrical in both directions. A threaded strip (18) is provided on the inner wall of the threaded sleeve. The threaded strip (18) is threadedly connected to the threaded plate (16).

7. The variable diameter stabilizer for drilling according to claim 6, characterized in that: Rotating sleeves (19) are respectively provided at both ends of the adjusting sleeve (17), and a hexagonal section (20) is provided at the middle position of the adjusting sleeve (17).

8. The variable diameter stabilizer for drilling according to claim 1, characterized in that: A handle (21) is respectively provided on the plurality of lead screws (4).

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