A welding positioning tool for oil and gas exploitation wellhead base
By designing welding positioning fixtures for the main frame and lifting adjustment mechanism, the problem of hole position deviation during the welding process of the wellhead base was solved, achieving precise positioning and efficient production, and reducing costs and storage requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HIMILE MECHANICAL MFG
- Filing Date
- 2025-05-28
- Publication Date
- 2026-07-21
AI Technical Summary
During the welding process of wellhead bases for oil and gas extraction, existing positioning tools are difficult to align precisely, resulting in large hole position deviations. Frequent tooling replacements increase costs and occupy storage space, affecting production efficiency and quality.
A welding positioning fixture was designed, comprising a main frame, a lifting and adjusting mechanism, and a crank-connecting rod hole positioning mechanism. The crank-connecting rod hole positioning mechanism enables precise positioning of the upper and lower platform holes of the wellhead base, while the lifting and adjusting mechanism adapts to different heights and reduces the frequency of fixture replacement.
It achieves precise positioning of the upper and lower platform holes of the wellhead base, reduces the scrap rate, reduces tooling costs, saves storage space, and improves production efficiency and ease of operation.
Smart Images
Figure CN224526328U_ABST
Abstract
Description
Technical Field
[0001] This utility model is used in the field of positioning tooling welding technology, specifically relating to a positioning tooling for welding the base of an oil and gas wellhead. Background Technology
[0002] Currently, welding is a crucial step in the manufacturing process of wellhead bases for oil and gas development, and the accuracy of welding positioning directly affects the quality and performance of the wellhead base. For wellhead bases of different heights, frequent changes of tooling at specific heights are required, which not only significantly increases production costs but also severely impacts production efficiency. Furthermore, a large number of tooling pieces of varying specifications occupy storage space. In addition, some positioning tooling uses simple fixing methods, making it difficult to accurately align the holes on the upper and lower surfaces of the wellhead base, resulting in significant hole position deviations during welding. Utility Model Content
[0003] To address the problems existing in the prior art, this utility model provides a welding and positioning fixture for oil and gas wellhead bases, which enables effective positioning of the wellhead base, meets the basic requirements for positioning in welding, improves welding quality, and reduces scrap rate.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] This utility model provides a welding and positioning fixture for the base of an oil and gas wellhead, comprising a main frame, a lifting and adjusting mechanism, and a crank connecting rod hole positioning mechanism;
[0006] The main frame includes a base, a top seat, and support rods. The support rods include a first support rod and a second support rod. The base and the top seat are connected by the first support rod and the second support rod.
[0007] The lifting adjustment mechanism includes fasteners and fixing holes. At least two fixing holes are located on the first support rod, and at least two fixing holes are located on the second support rod to achieve different height adjustments.
[0008] The crank-connecting rod hole positioning mechanism includes a first crank-connecting rod hole positioning mechanism and a second crank-connecting rod hole positioning mechanism. The first crank-connecting rod hole positioning mechanism is installed on the base and connected to the lower platform of the wellhead base, and the second crank-connecting rod hole positioning mechanism is installed on the top seat and connected to the upper platform of the wellhead base to achieve positioning.
[0009] As a preferred technical solution, the first support rod includes a first upper support rod and a first lower support rod; the second support rod includes a second upper support rod and a second lower support rod.
[0010] As a preferred technical solution, the center line of the fixing hole on the first support rod and the center line of the fixing hole on the second support rod are on the same horizontal line.
[0011] As a preferred technical solution, the first support rod and the second support rod are provided with a first groove and a second groove at opposite positions. A first slider is provided in the first groove and a second slider is provided in the second groove. Both the first slider and the second slider are provided with through holes of the same diameter as the fixing hole.
[0012] As a preferred technical solution, the first upper support rod and the first lower support rod are connected by the first slider and the fastener, and the second upper support rod and the second lower support rod are connected by the second slider and the fastener.
[0013] As a preferred technical solution, the fastener includes bolts and nuts. The bolts are passed through holes at corresponding positions and corresponding to the fixing holes of the first upper support rod. The bolts are then passed through holes at corresponding positions and corresponding to the fixing holes of the first lower support rod. The bolts are then passed through holes at corresponding positions and corresponding to the fixing holes of the second upper support rod. The bolts are then passed through holes at corresponding positions and corresponding to the fixing holes of the second lower support rod. All bolts are tightened with nuts, which can fix the first slider and the second slider at corresponding heights.
[0014] As a preferred technical solution, a first rotating shaft is installed at the center of the base, and a second rotating shaft is installed at the center of the top seat.
[0015] As a preferred technical solution, the first rotating shaft is connected to the base by a bearing, and the second rotating shaft is connected to the top seat by a bearing.
[0016] As a preferred technical solution, the first crank connecting rod hole positioning mechanism includes a first crank, which is rotatably connected to the first rotating shaft; the first crank is hinged to one end of the first connecting rod, and the other end of the first connecting rod is connected to a first positioning chuck, which fits into the lower platform hole of the wellhead base to achieve positioning.
[0017] As a preferred technical solution, the second crank connecting rod hole positioning mechanism includes a second crank, which is rotatably connected to the second rotating shaft; the second crank is hinged to one end of the second connecting rod, and the other end of the second connecting rod is connected to a second positioning chuck, which fits into the upper platform hole of the wellhead base to achieve positioning.
[0018] The beneficial effects of this utility model are as follows:
[0019] 1. Through the designed crank connecting rod hole positioning mechanism and positioning chuck, the holes on the upper platform and the lower platform of the wellhead base can be effectively positioned, meeting the basic positioning requirements for welding, improving welding quality, and reducing scrap rate;
[0020] 2. The equipped lifting and adjusting mechanism can be flexibly and conveniently adjusted according to the wellhead base of different heights, which significantly expands the application range of welding positioning fixtures, reduces the cost of making welding positioning fixtures separately for wellhead bases of different specifications, saves a lot of storage space, and improves the overall utilization efficiency of the fixtures.
[0021] 3. The operation process of the welding positioning fixture is simple and easy to understand. Whether it is the drive of the crank connecting rod hole positioning mechanism or the adjustment of the lifting and adjusting mechanism, the operation can be completed simply, which reduces the labor intensity and skill requirements of the operators and improves production efficiency. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the welding positioning fixture of this utility model;
[0023] Figure 2 This is another schematic diagram of the welding positioning fixture of this utility model;
[0024] Figure 3 This is a schematic diagram of the base and the positioning mechanism of the first crank connecting rod hole of the welding positioning fixture of this utility model.
[0025] Figure 4 This is a schematic diagram of the positioning mechanism between the top seat and the second crank connecting rod hole of the welding positioning fixture of this utility model.
[0026] Figure 5 This is a schematic diagram of the crank connecting rod hole positioning mechanism of the welding positioning tooling of this utility model;
[0027] Figure 6 This is a schematic diagram of the slider structure of the welding positioning tooling of this utility model;
[0028] Figure 7 This is a schematic diagram of the wellhead base structure of this utility model.
[0029] In the diagram, 1-main frame, 11-base, 12-top seat, 13-first support rod, 131-first upper support rod, 132-first lower support rod, 133-first groove, 14-second support rod, 141-second upper support rod, 142-second lower support rod, 143-second groove; 2-lifting adjustment mechanism, 21-first slider, 22-second slider, 23-fastener, 24-fixing hole, 25-through hole; 3-crank connecting rod hole positioning machine, 31-first crank connecting rod hole positioning mechanism, 311-first crank, 312-first connecting rod, 313-first positioning chuck, 32-second crank connecting rod hole positioning mechanism, 321-second crank, 322-second connecting rod, 323-second positioning chuck, 33-pin; 4-wellhead base, 41-upper platform, 42-lower platform, 43-rib plate. Detailed Implementation
[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0031] In the description of this utility model, it should be noted that the terms "front," "rear," "middle," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0034] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings and embodiments.
[0035] Please refer to Figures 1-7 This utility model provides an embodiment of a welding and positioning fixture for the base of an oil and gas wellhead, comprising a main frame 1, a lifting and adjusting mechanism 2, and a crank connecting rod hole positioning mechanism 3.
[0036] The main frame 1 includes a base 11, a top seat 12, a first support rod 13, and a second support rod 14. The base 11 and the top seat 12 are connected by the first support rod 13 and the second support rod 14. The first support rod 13 includes a first upper support rod 131 and a first lower support rod 132. The second support rod 14 includes a second upper support rod 141 and a second lower support rod 142. The first upper support rod 131 and the second upper support rod 141 are fixedly connected to the top seat 12. The first lower support rod 132 and the second lower support rod 142 are fixedly connected to the base 12. The first support rod 13 and the second support rod 14 are provided with a first groove 133 and a second groove 143 at opposite positions. The first support rod 13 and the second support rod 14 can be pre-marked with scales.
[0037] The lifting adjustment mechanism 2 comprises a first slider 21, a second slider 22, a fastener 23, a fixing hole 24, and a through hole 25. The first slider 21 is disposed in the first groove 133, and the second slider 22 is disposed in the second groove 143. At least two fixing holes 24 are provided on the first support rod 13, and at least two fixing holes 24 are provided on the second support rod 14. The center line of the fixing hole 24 on the first support rod 13 and the center line of the fixing hole 24 on the second support rod 14 are on the same horizontal line. Both the first slider 21 and the second slider 22 are provided with through holes 25 of the same diameter as the fixing holes 24. The fastener 23 includes bolts and nuts. When it is necessary to adjust the height of the welding positioning fixture according to the different heights of the wellhead base 4, the operator uses a wrench to loosen the currently tightened nut and pull the bolt out of the fixing hole 24 and the through hole 25. Manually lift or press down the first slider 21 and the second slider 22 to drive the top seat 12 to rise or fall. During the process, the height change of the top seat 12 can be roughly judged by referring to the scale marked on the first support rod 13 and the second support rod 14. After the top seat 12 is adjusted to a suitable position that matches the height of the wellhead base 4, select the corresponding fixing holes 24, and place the first slider 21 and the second slider 22 into the first groove 133 and the second groove 143 respectively. Use the corresponding holes 25 of the bolts to connect with the corresponding fixing holes 24 of the first upper support rod 131, and then use the bolts to pass through the corresponding holes 25 and the corresponding fixing holes 24 of the first lower support rod 132. Use the bolts to pass through the corresponding holes 25 and the corresponding fixing holes 24 of the second upper support rod 141, and then use the bolts to pass through the corresponding holes 25 and the corresponding fixing holes 24 of the second lower support rod 142. Then use a wrench to tighten the nuts on the fixing holes 24 of the first support rod 13 and the second support rod 14 respectively. Use the nuts and bolts to fix the first slider 21 and the second slider 22 in the current position, preparing for subsequent positioning and welding operations.
[0038] The crank-connecting rod hole positioning mechanism 3 includes a first crank-connecting rod hole positioning mechanism 31 and a second crank-connecting rod hole positioning mechanism 32. A first rotating shaft is installed at the center of the base 11, and the first rotating shaft is connected to the base 11 by a bearing. The first crank-connecting rod hole positioning mechanism 31 includes a first crank 311, which is rotatably connected to the first rotating shaft. The first crank 311 can rotate around the first rotating shaft, and the rotation of the first rotating shaft provides power to the positioning mechanism. One end of the first crank 311 and the first connecting rod 312 are simply hinged by a pin 33. This connection method allows the first connecting rod 312 to swing with the movement of the first crank 311. The other end of the first connecting rod 312 is connected to the first positioning chuck 313, which fits tightly with the lower platform 42 hole of the wellhead base 4 to achieve basic positioning. A second rotating shaft is installed at the center of the top seat 12. The second rotating shaft is connected to the top seat 12 by a bearing. The second crank connecting rod hole positioning mechanism 32 includes a second crank 321, which is rotatably connected to the second rotating shaft. The second crank 321 can rotate around the second rotating shaft. The rotation of the first rotating shaft provides power to the positioning mechanism. One end of the second crank 321 and the second connecting rod 322 are simply hinged by a pin 33. This connection method allows the second connecting rod 322 to swing with the movement of the second crank 321. The other end of the second connecting rod 322 is connected to the second positioning chuck 323. The second positioning chuck 323 fits tightly with the hole of the upper platform 41 of the wellhead base 4 to achieve basic positioning. When it is necessary to position the wellhead base 4, it can be manually rotated or driven by a small motor to rotate the first crank 311 and the second crank 321. As the first crank 311 and the second crank 321 rotate, the first connecting rod 312 drives the first positioning chuck 313 to move horizontally, and the second connecting rod 322 drives the second positioning chuck 323 to move horizontally. When the first positioning chuck 313 moves to approximately aligned with the hole in the lower platform 42 of the wellhead base 4, and the second positioning chuck 323 moves to approximately aligned with the hole in the upper platform 41 of the wellhead base 4, the rotation of the first crank 311 and the second crank 321 stops. At this time, the first positioning chuck 313 is inserted into the hole in the lower platform 42 of the wellhead base 4, and the second positioning chuck 323 is inserted into the hole in the upper platform 41 of the wellhead base 4, completing the initial positioning of the upper platform hole 41 and the lower platform 42 of the wellhead base 4. During welding with the stiffening plate, the first positioning chuck 313 and the second positioning chuck 323 can, to a certain extent, restrict the movement of the upper platform 41 and the lower platform 42, providing a basic guarantee for welding accuracy.
[0039] The working steps of this utility model are as follows:
[0040] Step 1: First, install the base 11 in the designated position, ensuring its levelness using a level and securing it with anchor bolts. Install the first crank-connecting rod hole positioning mechanism 31 on the base 11. Using simple measuring tools, roughly adjust the perpendicularity of the first rotating shaft to the upper surface of the base 11, ensuring that the movement direction of the first positioning chuck 313 is basically aligned with the center line of the hole in the lower platform 42. Then, install the first slider 21 and the second slider 22 in the first groove 133 and the second groove 134 respectively, checking the smoothness of their sliding. Next, install the fasteners 23, ensuring the bolts and nuts fit smoothly. Before installing the top seat 12, fix the second crank-connecting rod hole positioning mechanism 32 in the designated position. Then, connect the first upper support rod 131 to the first lower support rod 132, and the second upper support rod 141 to the second lower support rod 142, ensuring the upper surface of the top seat is level and secure. After assembly, inspect the entire welding positioning fixture to ensure that all components are securely connected and the mechanism moves normally.
[0041] Step 2: Based on the actual height of the wellhead base 4, the operator uses a wrench to loosen the currently tightened nut and pull the bolt out of the fixing hole 24 and through hole 25. Manually lift or press down the first slider 21 and the second slider 22 to drive the top seat 12 to rise or fall. During the process, the height change of the top seat 12 can be roughly judged by referring to the pre-marked scales on the first support rod 13 and the second support rod 14. After the top seat 12 is adjusted to a suitable position that matches the height of the wellhead base 4, select the corresponding fixing hole 24, and put the first slider 21 and the second slider 22 into the first groove 133 and the second groove 143 respectively. Use bolts to pass through the through holes 25 on the first slider 21 corresponding to the positions of the first upper support rod 131 and the first lower support rod 132, as well as the fixing holes 24 on the second slider 22 corresponding to the positions of the second upper support rod 141 and the second lower support rod 142. Then use a wrench to tighten the nuts on the fixing holes 24 of the first support rod 13 and the second support rod 14 respectively. Use the nuts and bolts to fix the first slider 21 and the second slider 22 in the current position, thus fixing the entire platform.
[0042] Step 3: When positioning the wellhead base 4, it can be manually rotated or driven by a small motor to rotate the first crank 311 and the second crank 321. As the first crank 311 and the second crank 321 rotate, the first connecting rod 312 drives the first positioning chuck 313 to move horizontally, and the second connecting rod 322 drives the second positioning chuck 323 to move horizontally. When the first positioning chuck 313 moves to approximately aligned with the lower platform 42 hole of the wellhead base 4, and the second positioning chuck 323 moves to approximately aligned with the upper platform 41 hole of the wellhead base 4, stop rotating the first crank 311 and the second crank 321. Adjust the height again so that the first positioning chuck 313 is inserted into the lower platform 42 hole of the wellhead base 4 and the second positioning chuck 323 is inserted into the upper platform 41 hole of the wellhead base 4, completing the positioning of the wellhead base 4.
[0043] Step 4: After positioning is completed, proceed with the welding operation. During the welding process, ensure that the welding positioning fixture remains stable at all times. Unauthorized movement is strictly prohibited. Clamps can also be used to further secure the base 11 to prevent displacement due to welding stress and external forces during the welding process.
[0044] Step 5: After welding is completed, reverse the previous operation to allow the first positioning chuck 313 and the second positioning chuck 323 to exit from the holes in the upper platform 41 and lower platform 42, respectively. Remove the welded wellhead base 4, and clean the surface of the welding positioning fixture of debris and welding spatter to prepare for the next use. During the fixture reset process, carefully observe the movement of each mechanism to ensure normal operation and no abnormalities.
[0045] This utility model, through its designed crank connecting rod hole positioning mechanism and positioning chuck, can effectively position the holes on the upper platform and the lower platform of the wellhead base. The equipped lifting and adjusting mechanism can be flexibly and conveniently adjusted according to the different heights of the wellhead base.
[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A welding and positioning fixture for the base of an oil and gas wellhead, characterized in that, It consists of a main frame (1), a lifting and adjusting mechanism (2), and a crank connecting rod hole positioning mechanism (3); The main frame (1) includes a base (11), a top seat (12), and support rods. The support rods include a first support rod (13) and a second support rod (14). The base (11) and the top seat (12) are connected by the first support rod (13) and the second support rod (14). The lifting adjustment mechanism (2) includes fasteners (23) and fixing holes (24). At least two fixing holes (24) are located on the first support rod (13) and at least two fixing holes (24) are located on the second support rod (14) to achieve different height adjustments. The crank connecting rod hole positioning mechanism (3) includes a first crank connecting rod hole positioning mechanism (31) and a second crank connecting rod hole positioning mechanism (32). The first crank connecting rod hole positioning mechanism (31) is installed on the base (11) and connected to the lower platform (42) of the wellhead base (4). The second crank connecting rod hole positioning mechanism (32) is installed on the top seat (12) and connected to the upper platform (41) of the wellhead base (4).
2. The welding and positioning fixture for oil and gas wellhead bases according to claim 1, characterized in that, The first support rod (13) includes a first upper support rod (131) and a first lower support rod (132); the second support rod (14) includes a second upper support rod (141) and a second lower support rod (142).
3. The welding and positioning fixture for oil and gas wellhead bases according to claim 2, characterized in that, The center line of the fixing hole (24) on the first support rod (13) is on the same horizontal line as the center line of the fixing hole (24) on the second support rod (14).
4. The welding and positioning fixture for oil and gas wellhead bases according to claim 3, characterized in that, The first support rod (13) and the second support rod (14) are provided with a first groove (133) and a second groove (143) at opposite positions. A first slider (21) is provided in the first groove (133) and a second slider (22) is provided in the second groove (143). Both the first slider (21) and the second slider (22) are provided with through holes (25) of the same diameter as the fixing hole (24).
5. A welding and positioning fixture for oil and gas wellhead bases according to claim 4, characterized in that... The first upper support rod (131) and the first lower support rod (132) are connected by the first slider (21) and the fastener (23), and the second upper support rod (141) and the second lower support rod (142) are connected by the second slider (22) and the fastener (23).
6. A welding and positioning fixture for oil and gas wellhead bases according to claim 5, characterized in that, The fastener (23) includes a bolt and a nut. The bolt is inserted through a hole (25) at a corresponding position and then through a corresponding fixing hole (24) of the first upper support rod (131). The bolt is then inserted through a hole (25) at a corresponding position and through a corresponding fixing hole (24) of the first lower support rod (132). The bolt is then inserted through a hole (25) at a corresponding position and through a corresponding fixing hole (24) of the second upper support rod (141). The bolt is then inserted through a hole (25) at a corresponding position and through a corresponding fixing hole (24) of the second lower support rod (142). All bolts are tightened with nuts, which can fix the first slider (21) and the second slider (22) at the corresponding height.
7. The welding and positioning fixture for oil and gas wellhead bases according to claim 1, characterized in that, The base (11) has a first rotating shaft installed at its center, and the top seat (12) has a second rotating shaft installed at its center.
8. A welding and positioning fixture for oil and gas wellhead bases according to claim 7, characterized in that, The first rotating shaft is connected to the base (11) by a bearing, and the second rotating shaft is connected to the top seat (12) by a bearing.
9. A welding and positioning fixture for oil and gas wellhead bases according to claim 8, characterized in that, The first crank connecting rod hole positioning mechanism (31) includes a first crank (311), which is rotatably connected to the first rotating shaft; the first crank (311) is hinged to one end of the first connecting rod (312), and the other end of the first connecting rod (312) is connected to the first positioning chuck (313), which fits into the hole of the lower platform (42) of the wellhead base (4) to achieve positioning.
10. A welding and positioning fixture for oil and gas wellhead bases according to claim 8, characterized in that, The second crank connecting rod hole positioning mechanism (32) includes a second crank (321), which is rotatably connected to the second shaft; the second crank (321) is hinged to one end of the second connecting rod (322), and the other end of the second connecting rod (322) is connected to the second positioning chuck (323), which fits into the hole of the upper platform (41) of the wellhead base (4) to achieve positioning.