Automatic tightening device for thread protector

Abstract

The utility model relates to the technical field of oil casing pipe mark spraying, in particular to an automatic screwing device for a thread protector, which comprises a casing pipe base, a driving assembly and a fixing assembly, and the casing pipe base is used for placing a casing pipe in a horizontal state; the driving assembly is connected with the sleeve base so as to drive the sleeve base to rotate; the fixing assembly is arranged on one axial side of the sleeve base and comprises a fixing support, a main rod, a first clamping part and a second clamping part, the first clamping part and the second clamping part are connected to the main rod in parallel, an outer arc face is arranged on the first clamping part, an inner arc face matched with the outer arc face is arranged on the second clamping part, and the fixing support is arranged on the main rod. The outer cambered surface and the inner cambered surface are oppositely arranged, a clamping space is formed between the outer cambered surface and the inner cambered surface, and the clamping space is used for fixing the thread protector; the fixing assembly is arranged to fix the thread protector, the sleeve is automatically screwed with the thread protector when rotating, and the installation efficiency of the thread protector is improved.

Description

Technical Field

[0001] This application relates to the field of oil casing manufacturing technology, and in particular to an automatic tightening device for thread protectors. Background Technology

[0002] Thread protectors can protect the threads of oil casing from bumps, wear, or external impacts during production, transportation, storage, and downhole operation, ensuring the integrity of the thread structure.

[0003] In the oil casing industry, thread protectors have traditionally been installed using a quick-clamp method. The protector's inner sleeve is aligned with the threaded connector, ensuring the threads are aligned, and then the protector is tightened using a handle wrench. This method is inefficient and wastes manpower.

[0004] Therefore, there is an urgent need for a device that can assist in tightening the thread protector installed on the oil casing. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide an automatic tightening device for thread protectors, which aims to solve the problem of low installation efficiency of existing oil casing thread protectors.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: an automatic tightening device for thread protectors, including a sleeve base for placing a horizontal sleeve;

[0007] A drive assembly connected to the sleeve base to drive the sleeve base to rotate;

[0008] A fixing component is disposed on one axial side of the sleeve base. The fixing component includes a fixing bracket, a main rod, a first clamping part, and a second clamping part. The first clamping part and the second clamping part are connected in parallel to the main rod. The first clamping part has an outer arc surface, and the second clamping part has an inner arc surface that matches the outer arc surface. The outer arc surface and the inner arc surface are arranged facing each other, and a clamping space is formed between the outer arc surface and the inner arc surface. The clamping space is used to fix the thread protector.

[0009] Optionally, the cross-sectional profile of the first clamping part is a fan ring, and the cross-sectional profile of the second clamping part is a circle.

[0010] Optionally, the fixing component includes a support step and an elastic element. The support step is disposed on the main rod on the side away from the first clamping part and the second clamping part. The first clamping part is provided with a first through hole and is sleeved between the support step and the second clamping part through the first through hole. The elastic element is sleeved on the main rod and is located between the support step and the first clamping part.

[0011] Optionally, the first clamping part further includes a second through hole, the direction of the second through hole is perpendicular to the first through hole, and the second through hole is connected to the first through hole. An adjusting screw that contacts the main rod is provided in the second through hole.

[0012] Optionally, the outer surfaces of both the first clamping part and the second clamping part are covered with anti-slip pads.

[0013] Optionally, the anti-slip pad is configured as silicone or rubber.

[0014] Optionally, the fixing assembly further includes a pushing structure disposed between the fixing bracket and the main rod to move the main rod closer to or further away from the sleeve base.

[0015] Optionally, the fixing assembly further includes a universal joint, through which the main rod is connected to the fixing bracket.

[0016] Optionally, the casing base includes at least one pair of rotatable support wheels, which are arranged side by side so that the oil casing is mounted between the two support wheels.

[0017] The drive assembly is configured as a drive motor and a reduction mechanism. The output shaft of the drive motor is connected to the support wheel through the reduction mechanism to make at least one of the support wheels rotate.

[0018] Compared with the prior art, this embodiment of the application, by setting a casing base and a drive assembly, enables the horizontally placed oil casing to rotate around the central axis. By setting a fixing assembly on one side of the axial direction, the position and thread of the thread protector are kept fixed. When the oil casing rotates, it can automatically tighten with the fixed thread protector, thereby improving the installation efficiency of the thread protector. Specifically, since the thread protector is a cylindrical cap with a concave center, in order to clamp the thread protector, the fixing assembly uses a first clamping part and a second clamping part connected in parallel to the main rod, clamping the thread protector between the first clamping part and the second clamping part, keeping it stationary. At the same time, the first clamping part has an outer arc surface, and the second clamping part has an inner arc surface that matches the outer arc surface. The outer arc surface and the inner arc surface correspond exactly to the cylindrical shell of the thread protector, increasing the contact area, thereby increasing the friction during clamping and improving the stability of the thread protector during tightening. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an automatic tightening device for a thread protector proposed in an embodiment of this application;

[0020] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0021] Figure 3 This is a three-dimensional structural diagram of the fixing component in Embodiment 1 of this application;

[0022] Figure 4 This is a schematic diagram of the usage state of the fixing component in Embodiment 1 of this application;

[0023] Figure 5 This is a three-dimensional structural diagram of the fixing component in Embodiment 1 of this application;

[0024] Figure 6 This is a schematic diagram of the usage state of the fixing component in Embodiment 1 of this application;

[0025] Figure 7 This is a three-dimensional structural diagram of the fixing component in Embodiment 1 of this application;

[0026] Figure 8 This is a schematic diagram of the usage state of the fixed component in Embodiment 1 of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Casing base; 11. Support wheel; 20. Drive assembly; 21. Drive motor; 22. Reduction mechanism; 30. Fixing assembly; 31. Fixing bracket; 32. Main rod; 33. First clamping part; 331. First through hole; 332. Adjusting screw; 34. Second clamping part; 35. Support step; 36. Elastic element; 37. Pushing structure; 40. Oil casing; 50. Thread protector. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0030] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Oil casing is a steel pipe used to support the wellbore of oil and gas wells, ensuring the smooth operation of the well during drilling and after completion. The casing and tubing are interconnected by threads to support the entire wellbore; therefore, during casing and tubing production, thread protectors are needed to protect the threads. Figure 4 As shown, the thread protector is shaped like a bottle cap with a concave center. The concave part is threaded to fix the thread protector to the end of the oil casing. During installation, the concave part needs to be aligned with the center of the oil casing to ensure that the threads are aligned before tightening. The installation steps are cumbersome and inefficient.

[0033] Example 1

[0034] Based on this, as per the instruction manual Figure 1 As shown, Figure 1A thread protector 50 tightening device is proposed, including a sleeve base 10, a drive assembly 20, and a fixing assembly 30. The sleeve base 10 is used to place a horizontally positioned sleeve. In this embodiment, the sleeve base includes at least a pair of rotatable support wheels 11, which are arranged side by side to support the oil sleeve 40 between the two support wheels 11. The support wheels 11 are rotatably mounted on a bracket via bearings. By using a pair of support wheels 11 to support the oil sleeve 40, the stable placement of oil sleeves 40 with different diameters can be achieved. The support wheels 11 are connected to the drive assembly 20 to drive the sleeve base 10 to rotate.

[0035] Specifically, the drive assembly 20 is configured as a drive motor 21 and a reduction mechanism 22. The output shaft of the drive motor 21 is connected to the support wheel 11 through the reduction mechanism 22, so that at least one of the support wheels 11 rotates. The reduction mechanism 22 may be a reduction gear set to increase the output torque, drive the support wheel 11 to rotate, thereby causing the oil sleeve 40 on it to rotate.

[0036] like Figure 1 and Figure 2 As shown in this embodiment, the fixing component 30 is disposed on one axial side of the sleeve base 10. The fixing component 30 includes a fixing bracket 31, a main rod 32, a first clamping part 33, and a second clamping part 34. The first clamping part 33 and the second clamping part 34 are connected in parallel to the main rod 32. The first clamping part 33 has an outer arc surface, and the second clamping part 34 has an inner arc surface that matches the outer arc surface. The outer arc surface and the inner arc surface face each other, forming a clamping space between them. The clamping space is used to fix the thread protector 50. During clamping, the first clamping part 33 contacts the outer side wall of the thread protector 50, and the second clamping part 34 contacts the inner side wall of the concave part of the thread protector 50. The thread protector 50 is fixed by friction and kept stationary. When the oil sleeve 40 rotates, the threads of the oil sleeve 40 and the thread protector 50 are automatically tightened, achieving an automatic installation effect and effectively improving the installation efficiency of the thread protector 50.

[0037] In this embodiment, the clamping space formed by the first clamping part 33 and the second clamping part 34 faces the oil casing 40. The width of the clamping space is slightly smaller than the width between the inner and outer side walls of the thread protector 50. When the thread protector 50 is fixed on the fixing assembly 30, the central axis of the thread protector 50 coincides with the central axis of the oil casing 40. Both the casing base and the fixing bracket 31 can be fixed at the same height using a stand to ensure the installation effect.

[0038] Furthermore, such as Figure 3 and Figure 4As shown, the curvature of the outer arc surface and the inner arc surface are matched with the curvature of the outer side wall and the inner side wall of the thread protector 50, respectively, which fully increases the contact area between the first clamping part 33 and the second clamping part 34 and the thread protector 50, thereby increasing the friction between the first clamping part 33 and the second clamping part 34 and the thread protector 50, and ensuring that the thread protector 50 is firmly fixed on the fixing component 30.

[0039] In some embodiments, the cross-sectional profile of the first clamping portion 33 is a fan ring, and the cross-sectional profile of the second clamping portion 34 is a circle. The inner arc of the fan ring is the same as the outer wall arc of the thread protector 50, and the arc of the cross-sectional circle of the second clamping portion 34 is less than or equal to the inner wall arc of the thread protector 50, thereby ensuring the clamping effect of the thread protector 50.

[0040] In some embodiments, the outer surfaces of both the first clamping portion 33 and the second clamping portion 34 are covered with anti-slip pads. By providing anti-slip pads, the thread protector 50 is clamped more stably, preventing the thread protector 50 from rotating with the oil casing 40 when it is connected to the oil casing 40, thus improving the installation effect.

[0041] In this embodiment, the anti-slip pad can be made of silicone or rubber, which have a high coefficient of friction.

[0042] In some embodiments, the fixing assembly 30 further includes an electromagnet embedded in the first clamping portion 33 and the second clamping portion 34. By activating the electromagnet, the attraction of the first clamping portion 33 and the second clamping portion 34 to the thread protector 50 is enhanced, making the position of the thread protector 50 more stable and preventing it from rotating with the oil sleeve 40 during docking.

[0043] In some embodiments, the fixing assembly 30 further includes a pushing structure 37 disposed between the fixing bracket 31 and the main rod 32, so that the main rod 32 moves closer to or further away from the sleeve base 10. A certain distance is maintained between the fixing assembly 30 and the sleeve base 10. By providing the pushing structure 37, the thread protector 50 fixed on the first clamping part 33 and the second clamping part 34 can move forward and contact the oil sleeve 40 on the sleeve base 10, thereby achieving the installation of the thread protector 50.

[0044] In this embodiment, the pushing structure 37 is configured as a pushing cylinder, which can be one of a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder. The output direction of the pushing cylinder is the same as the axial direction of the oil casing 40, and the stroke of the pushing cylinder is the same as the distance between the fixed component 30 and the oil casing 40. When the pushing rod moves, the thread protector 50 approaches the oil casing 40 from both ends and docks with it.

[0045] In some embodiments, the fixing assembly 30 further includes a universal joint (not shown in the figure), through which the main rod 32 is connected to the fixing bracket 31. The universal joint allows workers to more flexibly adjust the orientation of the main rod 32 and the clamping space, thereby adjusting the orientation of the thread protector 50, facilitating the connection of oil sleeves 40 at different positions and angles, and improving the flexibility of the device.

[0046] Example 2

[0047] like Figure 5 and Figure 6 As shown, the difference between this embodiment and Embodiment 1 lies in the structure of the fixing component 30. In this embodiment, the fixing component 30 includes a supporting step 35 and an elastic element 36. The supporting step 35 is disposed on the main rod 32 on the side away from the first clamping part 33 and the second clamping part 34. The first clamping part 33 has a first through hole 331, and the first clamping part 33 is sleeved between the supporting step 35 and the second clamping part 34 through the first through hole 331. The elastic element 36 is sleeved on the main rod 32 and is located between the supporting step 35 and the first clamping part 33. The first through hole 331 is slightly larger than the main rod 32, allowing the first clamping part 33 to move along the main rod 32. At the same time, by setting the supporting step 35 and the elastic element 36, the first clamping part 33 always tends to move towards the second clamping part under the elastic force of the elastic element 36. Therefore, the spacing of the clamping space can be flexibly changed to meet the fixing of thread protectors 50 of different sizes.

[0048] In this embodiment, the elastic element 36 is a coarse spring, which can provide greater elastic force to ensure sufficient friction when the first clamping part 33 contacts the outer wall of the thread protector 50.

[0049] Example 3

[0050] like Figure 7 and Figure 8As shown, the difference between this embodiment and Embodiment 2 lies in the structure of the fixing component 30. In this embodiment, the first clamping part 33 further includes a second through hole. The direction of the second through hole is perpendicular to the first through hole 331, and the second through hole communicates with the first through hole 331. An adjusting screw 332 that contacts the main rod 32 is provided in the second through hole. When the adjusting screw 332 is tightened, the adjusting screw 332 presses against the main rod 32, fixing the position of the first clamping part 33 and the distance between the first clamping part 33 and the second clamping part 34. When adjustment is required, the adjusting screw 332 is loosened, and the first clamping part 33 can move along the axial direction of the main rod 32, facilitating fine adjustments by the operator and locking the position of the spring to ensure that the clamping space matches the thread protector 50, improving the stability of the thread protector 50 during clamping, and thus ensuring the effect of automatic installation.

[0051] In this embodiment, by setting a sleeve base 10 and a drive assembly 20, the horizontally placed oil sleeve 40 can rotate around its central axis. By setting a fixing assembly 30 on one side of the axial direction, the position and thread of the thread protector 50 are kept fixed. When the oil sleeve 40 rotates, it can automatically tighten with the fixed thread protector 50, thereby improving the installation efficiency of the thread protector 50. Specifically, since the thread protector 50 is a cylindrical cap with a concave center, in order to clamp the thread protector 50, the fixing assembly 30 uses a first clamping part 33 and a second clamping part 34 connected in parallel to the main rod 32, clamping the thread protector 50 between the first clamping part 33 and the second clamping part 34 to keep it stationary. At the same time, the first clamping part 33 has an outer arc surface, and the second clamping part 34 has an inner arc surface that matches the outer arc surface. The outer arc surface and the inner arc surface correspond exactly to the cylindrical shell of the thread protector 50, increasing the contact area and thus increasing the friction during clamping, thereby improving the stability of the thread protector 50 during tightening.

[0052] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An automatic tightening device for thread protectors, characterized in that, include Sleeve base, used to hold horizontally positioned sleeves; A drive assembly connected to the sleeve base to drive the sleeve base to rotate; A fixing component is disposed on one axial side of the sleeve base. The fixing component includes a fixing bracket, a main rod, a first clamping part, and a second clamping part. The first clamping part and the second clamping part are connected in parallel to the main rod. The first clamping part has an outer arc surface, and the second clamping part has an inner arc surface that matches the outer arc surface. The outer arc surface and the inner arc surface are arranged facing each other, and a clamping space is formed between the outer arc surface and the inner arc surface. The clamping space is used to fix the thread protector.

2. The automatic tightening device for thread protectors according to claim 1, characterized in that, The cross-sectional profile of the first clamping part is a fan ring, and the cross-sectional profile of the second clamping part is a circle.

3. The automatic tightening device for thread protectors according to claim 1, characterized in that, The fixing component includes a support step and an elastic element. The support step is disposed on the main rod on the side away from the first clamping part and the second clamping part. The first clamping part is provided with a first through hole and is sleeved between the support step and the second clamping part through the first through hole. The elastic element is sleeved on the main rod and is located between the support step and the first clamping part.

4. The automatic tightening device for thread protectors according to claim 3, characterized in that, The first clamping part further includes a second through hole, the direction of the second through hole is perpendicular to the first through hole, and the second through hole is connected to the first through hole. An adjusting screw that contacts the main rod is provided in the second through hole.

5. The automatic tightening device for thread protectors according to claim 1, characterized in that, The outer surfaces of both the first clamping part and the second clamping part are covered with anti-slip pads.

6. The automatic tightening device for thread protectors according to claim 5, characterized in that, The anti-slip pad is made of silicone or rubber.

7. The automatic tightening device for thread protectors according to claim 1, characterized in that, The fixing component also includes a pushing structure disposed between the fixing bracket and the main rod, so as to move the main rod closer to or further away from the sleeve base.

8. The automatic tightening device for thread protectors according to claim 1, characterized in that, The fixing component also includes a universal joint, through which the main rod is connected to the fixing bracket.

9. The automatic tightening device for thread protectors according to claim 1, characterized in that, The casing base includes at least one pair of rotatable support wheels, which are arranged side by side so that the oil casing is mounted between the two support wheels.

10. The automatic tightening device for thread protectors according to claim 9, characterized in that, The drive assembly is configured as a drive motor and a reduction mechanism. The output shaft of the drive motor is connected to the support wheel through the reduction mechanism to make at least one of the support wheels rotate.

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