Multi-stage sealing assembly of oil production wellhead device
By using the design of the light rod, limiting mechanism and reinforcement mechanism in the oil production wellhead device, the problem of frequent disassembly of sealing fillers and loose bolts is solved, the stability and installation convenience of the multi-stage sealing components of the oil production wellhead device are improved, and the Sealing effect.
Patent Information
- Application Number
- CN202421674267.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-07-15
AI Technical Summary
In use, the existing multi-stage sealing components of the oil production wellhead device need to be frequently disassembled and replaced, and the bolt connection is easy to loosen and inconvenient to install, resulting in poor connection stability.
The design includes a sealing seat, a bar, a pressure gauge, a scraper ring, a limiting mechanism and a reinforcement mechanism. The sealing seat is driven by the bar, and the limiting mechanism and a reinforcement mechanism improve the connection stability, ensuring the effective connection of the seal and preventing it from falling off.
It improves the connection stability of the multi-stage sealing components of the oil production wellhead device, simplifies the installation process, prevents bolts from loosening, and enhances the sealing effect and practical use.
Smart Images
Figure CN222350682U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of oil wellhead sealing devices, in particular to a multi-stage sealing component of an oil wellhead device. Background Art
[0002] Oil wells are equipment used to extract oil from underground oil formations. They are widely used in the oil industry and are a key component of oil production. The wellhead is the top of the well, usually located above ground. It provides an entrance so that equipment and materials can enter the well. Oil wellheads usually have multi-stage sealing components, which are designed to ensure the safe operation of the wellhead and the efficient operation of oil production. The main function of the multi-stage sealing components of the oil wellhead device is to prevent the leakage of oil and gas. Due to the high pressure, high temperature and corrosive substances in the oil well, if there are no effective sealing measures, oil and gas will leak to the wellhead, causing waste of oilfield resources and environmental pollution.
[0003] However, the existing multi-stage sealing assembly for oil wellhead devices is in a split type during use because the sealing packing often needs to be disassembled and replaced. Usually, a connection method of multiple bolts is adopted. However, the bolts are prone to loosening after long-term use and are inconvenient to install. Therefore, we propose a multi-stage sealing assembly for oil wellhead devices. Utility Model Content
[0004] The utility model aims to provide a multi-stage sealing assembly for an oil wellhead device to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-stage sealing assembly of an oil wellhead device, comprising a sealing seat, a pressure gauge and a scraper ring, the multi-stage sealing assembly of the oil wellhead device comprising: a base is fixed above the sealing seat, a connecting tube is fixedly connected above the base, a No. 2 tube is fixedly connected above the connecting tube, a No. 1 tube is connected above the No. 2 tube by bolts, a light rod passes through the middle of the sealing seat, the base, the connecting tube, the No. 2 tube and the No. 1 tube, the pressure gauge is installed on one side of the base, a ball is installed on the inner wall of the sealing seat close to the light rod, a lubrication cavity is opened in the connecting tube close to the light rod, injection tubes are connected to both ends of the connecting tube close to the lubrication cavity, and the scraper ring is fixed below the sealing seat.
[0006] Preferably, the scraper ring is sleeved with the polished rod, a seal is sleeved on the outer side of the polished rod near the top of the first tube, a sealing filler is installed inside the second tube, and the sealing filler is sleeved with the polished rod.
[0007] Preferably, the two ends of the second barrel close to the light rod are installed with limiting mechanisms, the side of the first barrel close to the second barrel is connected with a reinforcement mechanism, and one side of the reinforcement mechanism is connected to the second barrel.
[0008] Preferably, the limiting mechanism comprises a limiting plate, a connecting rod, a screw, a movable plate and an elastic sealing ring, screws penetrate through both ends of the second barrel close to the light rod, and one end of the screw close to the light rod is connected to the movable plate through a bearing.
[0009] Preferably, both ends of the movable plate are slidably connected to the reserved groove on the inner wall of the second barrel, one end of the movable plate away from the screw rod is connected to a connecting rod, and one end of the connecting rod close to the light rod is connected to a limiting plate.
[0010] Preferably, an elastic sealing ring is installed on the inner wall of the second barrel close to the connecting rod, and the elastic sealing ring is sleeved on the outer side of the connecting rod.
[0011] Preferably, the reinforcement mechanism comprises a docking ring, a limiting groove, a limiting block, a supporting spring and a docking groove, and a docking ring is fixed on a side of the first barrel close to the second barrel.
[0012] Preferably, a docking groove is provided on a side of the second barrel close to the docking ring, a supporting spring is provided in the built-in groove of the docking ring, and a limiting block is provided on one side of the supporting spring.
[0013] Preferably, the limit block and the built-in groove of the docking ring are slidably connected, and a limit groove is provided on the inner wall of the second barrel close to the limit block, and the limit groove is located on one side of the docking groove.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] The multi-stage sealing assembly of the oil wellhead device proposed by the utility model can be achieved by directly inserting the docking ring into the docking groove, and then rotating the No. 1 tube to make the No. 1 tube drive the docking ring to rotate in the docking groove, and then the support spring rebounds to drive the limit block to be stuck in the limit groove, and then the bolt is installed and directly pulled upwards, so that the No. 1 tube cannot be pulled out from the No. 2 tube, which improves the connection stability between the No. 1 tube and the No. 2 tube, is beneficial to reinforce the connection of the multi-stage sealing assembly of the oil wellhead device, and improves the stability of the multi-stage sealing assembly of the oil wellhead device. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the main structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the main cross-sectional structure of the limiting mechanism of the utility model;
[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the docking ring of the utility model from top view;
[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the limit plate of the utility model from top view;
[0021] Figure 6 This is an enlarged structural diagram of the utility model at A;
[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the scraper ring of the utility model.
[0023] In the figure: 1. Sealing seat; 2. Polished rod; 3. No. 1 tube; 4. Connecting tube; 5. Scraper ring; 6. Pressure gauge;
[0024] 7. Limiting mechanism; 701. Limiting plate; 702. Connecting rod; 703. Screw; 704. Moving plate; 705. Elastic sealing ring; 8. Injection tube; 9. Lubrication chamber; 10. Reinforcement mechanism; 1001. Docking ring; 1002. Limiting groove; 1003. Limiting block; 1004. Support spring; 1005. Docking groove; 11. Base; 12. Ball; 13. No. 2 cylinder; 14. Sealing filler; 15. Sealing element. DETAILED DESCRIPTION
[0025] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Embodiment 1
[0027] See also Figure 1-Figure 7The utility model provides a technical solution: a multi-stage sealing component of an oil wellhead device, including a sealing seat 1, a pressure gauge 6 and a scraper ring 5. The multi-stage sealing component of the oil wellhead device includes: a base 11 is fixed above the sealing seat 1, a connecting tube 4 is fixedly connected above the base 11, a second tube 13 is fixedly connected above the connecting tube 4, a first tube 3 is connected above the second tube 13 by bolts, and a light is passed through the middle of the sealing seat 1, the base 11, the connecting tube 4, the second tube 13 and the first tube 3. Rod 2, the pressure gauge 6 is installed on one side of the base 11, a ball 12 is installed on the inner wall of the sealing seat 1 close to the light rod 2, a lubrication cavity 9 is opened inside the connecting tube 4 close to the light rod 2, injection tubes 8 are connected to the two ends of the connecting tube 4 close to the lubrication cavity 9, the scraper ring 5 is fixed under the sealing seat 1, the scraper ring 5 is sleeved with the light rod 2, a seal 15 is sleeved on the outer side of the light rod 2 close to the top of the No. 1 tube 3, a sealing packing 14 is installed inside the No. 2 tube 13, and the sealing packing 14 is sleeved with the light rod 2.
[0028] During specific implementation, the polished rod 2 drives the sealing seat 1 to enter the wellhead, and the sealing seat 1 is installed at the oil production wellhead. The pressure gauge 6 detects the pressure of the oil production wellhead in real time. At the same time, the sealing member 15 and the sealing filler 14 perform multi-stage sealing. Anti-rust lubricating oil can be injected at the injection pipe 8. The anti-rust lubricating oil contacts the outer wall of the polished rod 2 in the lubrication cavity 9, which can improve the lubricity of the polished rod 2. The ball 12 facilitates the pulling and pulling of the polished rod 2. The scraper ring 5 scrapes off the dirt adhering to the outside of the polished rod 2 to prevent the polished rod 2 from driving the dirt into the interior of the multi-stage sealing assembly of the oil production wellhead device.
[0029] Embodiment 2
[0030] See also Figure 1-Figure 3 and Figure 5 On the basis of the first embodiment, the two ends of the second cylinder 13 close to the light rod 2 are equipped with a limiting mechanism 7, and the limiting mechanism 7 includes a limiting plate 701, a connecting rod 702, a screw 703, a movable plate 704 and an elastic sealing ring 705. The two ends of the second cylinder 13 close to the light rod 2 are penetrated by the screw 703, and the end of the screw 703 close to the light rod 2 is connected to the movable plate 704 through a bearing. The two ends of the movable plate 704 are slidably connected to the reserved groove on the inner wall of the second cylinder 13, the end of the movable plate 704 away from the screw 703 is connected to the connecting rod 702, and the end of the connecting rod 702 close to the light rod 2 is connected to the limiting plate 701. An elastic sealing ring 705 is installed on the inner wall of the second cylinder 13 close to the connecting rod 702, and the elastic sealing ring 705 is sleeved on the outer side of the connecting rod 702. The screw 703 and the inner wall of the second cylinder 13 are threadedly connected, and the shape of the limiting plate 701 is arc-shaped.
[0031] During specific implementation, since the light rod 2 inside the multi-stage sealing assembly of the oil wellhead device may accidentally fall off during the oil pumping process, thereby reducing the stability of the multi-stage sealing assembly of the oil wellhead device, the screw 703 can be rotated to make the screw 703 threadably engaged with the inner wall of the second cylinder 13, so that the screw 703 pushes the movable plate 704 to one side, and then the two ends of the movable plate 704 slide in the reserved grooves of the second cylinder 13, and the movable plate 704 drives the connecting rod 702 to push the limit plate 701 toward the light rod 2, so that the limit plate 701 is against the outer side of the light rod 2, providing a certain supporting force for the light rod 2, which can prevent the light rod 2 from accidentally falling off during the oil pumping process, thereby improving the practicality of the multi-stage sealing assembly of the oil wellhead device.
[0032] Embodiment 3
[0033] See also Figure 2 , Figure 4 and Figure 6 On the basis of the second embodiment, the side of the first cylinder 3 close to the second cylinder 13 is connected with a reinforcement mechanism 10, and one side of the reinforcement mechanism 10 is connected to the second cylinder 13, the reinforcement mechanism 10 includes a docking ring 1001, a limit groove 1002, a limit block 1003, a support spring 1004 and a docking groove 1005, the side of the first cylinder 3 close to the second cylinder 13 is fixed with a docking ring 1001, the side of the second cylinder 13 close to the docking ring 1001 is provided with a docking groove 1005, and the built-in groove of the docking ring 1001 is provided with A support spring 1004 is provided with a limit block 1003 on one side of the support spring 1004, and the limit block 1003 is slidably connected to the built-in groove of the docking ring 1001. A limit groove 1002 is provided on the inner wall of the second cylinder 13 close to the limit block 1003, and the limit groove 1002 is located on one side of the docking groove 1005. Bolts are installed in a ring shape on the outer side of the first cylinder 3 and the second cylinder 13. The interface shape of the limit block 1003 is triangular, and the limit blocks 1003 are distributed in a ring shape on the outer side of the docking ring 1001.
[0034] During specific implementation, when using the multi-stage sealing assembly of the oil wellhead device, since the sealing filler 14 often needs to be disassembled and replaced, the multi-stage sealing assembly of the oil wellhead device will adopt a split type, and usually a connection method of multiple bolts is adopted. However, the bolts are prone to loosening after long-term use, and it is inconvenient to install. The docking ring 1001 can be directly inserted into the docking groove 1005, and then the No. 1 cylinder 3 is rotated to make the No. 1 cylinder 3 drive the docking ring 1001 to rotate in the docking groove 1005, and then the support spring 1004 rebounds to drive the limit block 1003 to be stuck in the limit groove 1002, and then the bolts are installed and pulled directly upwards. The No. 1 cylinder 3 cannot be pulled out from the No. 2 cylinder 13, which improves the connection stability between the No. 1 cylinder 3 and the No. 2 cylinder 13, is beneficial to reinforce the connection of the multi-stage sealing assembly of the oil wellhead device, and improves the stability of the multi-stage sealing assembly of the oil wellhead device.
[0035] In actual use, firstly, the No. 1 cylinder 3 and the No. 2 cylinder 13 are stably linked together by bolts and the reinforcement mechanism 10, and then the multi-stage sealing assembly of the oil wellhead device is installed at the oil wellhead through the sealing seat 1, and then the light rod 2 draws the oil in the oil well, and then the position of the light rod 2 is limited by the limiting mechanism 7 to prevent accidental falling off. At the same time, the pressure gauge 6 detects the pressure value. During the upward pulling of the light rod 2, the scraper ring 5 scrapes off the dirt on the outside of the light rod 2, the injection tube 8 and the lubrication chamber 9 lubricate the light rod 2, and the elastic sealing ring 705, the sealing filler 14 and the sealing member 15 perform effective graded sealing. The reinforcement mechanism 10 and the limiting mechanism 7 improve the stability and practicality of the multi-stage sealing assembly of the oil wellhead device.
[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A multi-stage sealing assembly for an oil wellhead device, comprising a sealing seat (1), a pressure gauge (6) and a scraper ring (5), characterized in that: The multi-stage sealing assembly of the oil wellhead device comprises: a base (11) is fixed above the sealing seat (1), a connecting tube (4) is fixedly connected above the base (11), a No. 2 tube (13) is fixedly connected above the connecting tube (4), a No. 1 tube (3) is connected to the No. 2 tube (13) via bolts above the No. 1 tube (3), a smooth rod (2) is passed through the middle of the sealing seat (1), the base (11), the connecting tube (4), the No. 2 tube (13) and the No. 1 tube (3), the pressure gauge (6) is installed on one side of the base (11), a ball (12) is installed on the inner wall of the sealing seat (1) close to the smooth rod (2), a lubrication cavity (9) is opened inside the connecting tube (4) close to the smooth rod (2), injection tubes (8) are connected to the two ends of the connecting tube (4) close to the lubrication cavity (9), and the scraper ring (5) is fixed below the sealing seat (1).
2. The multi-stage sealing assembly of an oil wellhead device according to claim 1, characterized in that: The scraper ring (5) is sleeved with the polished rod (2), the outer side of the polished rod (2) near the top of the first cylinder (3) is sleeved with a sealing member (15), the interior of the second cylinder (13) is provided with a sealing filler (14), and the sealing filler (14) is sleeved with the polished rod (2).
3. The multi-stage sealing assembly of an oil wellhead device according to claim 2, characterized in that: The two ends of the second barrel (13) close to the bare rod (2) are equipped with limiting mechanisms (7), and the side of the first barrel (3) close to the second barrel (13) is connected to a reinforcement mechanism (10), and one side of the reinforcement mechanism (10) is connected to the second barrel (13).
4. The multi-stage sealing assembly of an oil wellhead device according to claim 3, characterized in that: The limiting mechanism (7) comprises a limiting plate (701), a connecting rod (702), a screw (703), a movable plate (704) and an elastic sealing ring (705); the screws (703) penetrate through both ends of the second cylinder (13) close to the light rod (2); and the movable plate (704) is connected to one end of the screw (703) close to the light rod (2) via a bearing.
5. The multi-stage sealing assembly for an oil wellhead device according to claim 4, characterized in that: The two ends of the movable plate (704) are slidably connected to the reserved groove on the inner wall of the second cylinder (13); the end of the movable plate (704) away from the screw rod (703) is connected to a connecting rod (702); and the end of the connecting rod (702) close to the light rod (2) is connected to a limiting plate (701).
6. The multi-stage sealing assembly for an oil wellhead device according to claim 5, characterized in that: An elastic sealing ring (705) is installed on the inner wall of the second cylinder (13) close to the connecting rod (702), and the elastic sealing ring (705) is sleeved on the outer side of the connecting rod (702).
7. The multi-stage sealing assembly for an oil wellhead device according to claim 3, characterized in that: The reinforcement mechanism (10) comprises a docking ring (1001), a limiting groove (1002), a limiting block (1003), a supporting spring (1004) and a docking groove (1005); the docking ring (1001) is fixed on a side of the first barrel (3) close to the second barrel (13).
8. The multi-stage sealing assembly of an oil wellhead device according to claim 7, characterized in that: A docking groove (1005) is provided on one side of the second cylinder (13) close to the docking ring (1001), a support spring (1004) is provided in the built-in groove of the docking ring (1001), and a limit block (1003) is provided on one side of the support spring (1004).
9. The multi-stage sealing assembly of an oil wellhead device according to claim 8, characterized in that: The limit block (1003) is slidably connected to the built-in groove of the docking ring (1001), and a limit groove (1002) is provided on the inner wall of the second cylinder (13) close to the limit block (1003), and the limit groove (1002) is located on one side of the docking groove (1005).