A sealing component and wellhead device

Abstract

This utility model relates to the field of oil extraction technology and discloses a sealing component and wellhead device, including a sealing chamber installed on an oil production pipeline. The sealing chamber is fixedly connected to the oil production pipeline via a flange. An inlet communicating with the oil production pipeline is provided on the sealing chamber. Symmetrically arranged electric telescopic rods are provided on the left side of the sealing chamber. The telescopic ends of the electric telescopic rods are located inside the sealing chamber and connected to a sealing movable plate that conforms to the inner wall of the sealing chamber. The sealing movable plate can slide left and right within the sealing chamber. By setting up a sealing chamber, in conjunction with the electric telescopic rods and the sealing movable plate, when the sealing movable plate slides to the inlet position, a superposition of dynamic and static sealing can be achieved, which can more effectively block the leakage path of high-pressure media in the oil production pipeline. By using symmetrically arranged electric telescopic rods to drive the sealing movable plate, the sealing movable plate can be subjected to uniform force, avoiding tilting or jamming due to unilateral force during sliding, and reducing frictional loss.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, specifically to a sealing component and wellhead device. Background Technology

[0002] Wellhead equipment is the core equipment installed at the wellhead after oil and gas drilling. It is used to control fluid pressure and direction, seal the wellhead, and ensure operational safety and production efficiency. It mainly consists of the casing head, tubing head, and Christmas tree: the casing head suspends and seals each layer of casing, the tubing head supports the tubing and connects to the Christmas tree, and the Christmas tree regulates wellhead pressure and flow through valves. This equipment also supports well control and acidizing operations, conforms to industry standards, and is the core of the well control system, directly affecting oil and gas well safety and production management efficiency.

[0003] The patent with publication number CN222141201U discloses a sealing component and an oil wellhead device, including an oil production pipeline. The outer end of the oil production pipeline is bolted to a bolt fastening mechanism, and the upper end of the bolt fastening mechanism is fixedly connected to a threaded pipe port with threads on the outside. A limiting sleeve is provided, and the inner end of the limiting sleeve has a partition groove. A rotating sealing device is provided inside the partition groove. This device, by setting a rotating sealing device, allows the sealing ring and the pipeline to be temporarily sealed by rotating the limiting sleeve when damaged, which can effectively prevent the leakage of oil and natural gas. The operation is relatively simple, and when restoring use, it is only necessary to rotate the limiting sleeve to open the sealing sleeve and allow the pipeline to flow.

[0004] While the aforementioned devices effectively prevent oil and natural gas leaks, they still have the following shortcomings:

[0005] When in use, the above-mentioned device achieves sealing by rotating the limiting sleeve to compress the sealing sleeve. It relies solely on the fit between the sealing sleeve and the partition groove to form a single seal. Furthermore, the compression force of manual rotation is uncontrollable. If the pressure is too low, leakage is likely to occur, while if the pressure is too high, the sealing sleeve is likely to be damaged. At the same time, this structure achieves sealing and opening by manually rotating the limiting sleeve. The operational precision depends entirely on human experience, making it difficult to accurately control the degree of sealing. This may result in over-sealing, which may damage the sealing sleeve, or under-sealing, which may still lead to leakage. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides a sealing component and wellhead device, which improves the sealing effect of the wellhead device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sealing assembly, including a sealing chamber installed on an oil production pipeline, the sealing chamber being fixedly connected to the oil production pipeline via a flange, an inlet communicating with the oil production pipeline being provided on the sealing chamber, and an electrically symmetrically arranged electric telescopic rod on the left side of the sealing chamber, the telescopic end of the electric telescopic rod being located inside the sealing chamber and connected to a sealing movable plate that fits against the inner wall of the sealing chamber, the sealing movable plate being able to slide left and right inside the sealing chamber.

[0008] Furthermore, sealing gaskets that fit against the inner walls of the sealing chamber are provided on the front and rear sides of the sealing moving plate, and a sealing ring that fits against the sealing gaskets is provided on the inner side of the sealing chamber at the feed inlet.

[0009] Furthermore, a positioning plate is provided extending from the middle of the left side of the sealing moving plate. The positioning plate is located between the two electric telescopic rods. A positioning rod is provided extending from the rear side of the positioning plate. A positioning port for the positioning rod to move left and right is opened on the rear side of the sealing chamber. A distance scale is provided on the outer side of the rear side of the sealing chamber.

[0010] Furthermore, a limiting bottom ring is provided on the outer surface of the positioning rod. The diameter of the limiting bottom ring is larger than the width of the positioning opening, and the bottom surface of the limiting bottom ring is attached to the outer side of the sealed cavity.

[0011] Furthermore, the upper and lower ends of the limiting bottom ring are provided with distance indicator needles that point parallel to the distance scale, and the bottom surface of the distance indicator needles is attached to the outside of the sealed cavity.

[0012] Furthermore, a flange sealing ring is provided on the inner side of the flange, and an installation sealing ring that fits against the flange sealing ring is provided on the outer side of the sealing cavity.

[0013] Furthermore, a wellhead device includes the aforementioned sealing assembly and also includes an oil production pipeline.

[0014] Furthermore, a connecting threaded sleeve is provided on the outer side of the sealed chamber at the feed inlet, and a connecting threaded groove that mates with the connecting threaded sleeve is provided on the inner side of the oil production pipeline.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By setting up a sealed chamber, in conjunction with an electric telescopic rod and a sealing moving plate, dynamic and static sealing can be superimposed when the sealing moving plate slides to the inlet position, which can more effectively block the leakage path of high-pressure media in the oil pipeline. Using symmetrical electric telescopic rods to drive the sealing moving plate ensures uniform force distribution, preventing tilting or jamming due to unilateral force during sliding and reducing frictional wear between the seal and the inner wall of the chamber. A sealing gasket layer forms a movable sealing surface that slides synchronously with the sealing moving plate, sealing gaps generated during sliding and engaging with the sealing ring, significantly improving sealing reliability. The use of a positioning plate and positioning rod, along with the sealing chamber's upper... The distance scale clearly reflects the real-time position of the sealing moving plate, allowing operators to accurately read its sliding distance. A limiting bottom ring ensures the positioning rod moves smoothly without wobbling. A distance indicator ensures a stable relative position between the indicator and the scale, further improving adjustment accuracy. Flange and installation sealing rings effectively seal the connection gaps between the flange and the sealing chamber / oil pipeline, enhancing the overall sealing system's reliability. Threaded sleeves and grooves provide a threaded connection, supplementing the flange connection and further improving connection stability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention after being disassembled as a whole;

[0019] Figure 3 This is a three-dimensional structural diagram of the oil production pipeline of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the sealing component of this utility model after it has been cut open;

[0021] Figure 5 This utility model Figure 4 A magnified three-dimensional structural diagram of point A in the middle.

[0022] In the diagram: 1. Oil production pipeline; 101. Connecting threaded groove; 2. Sealing chamber; 201. Inlet; 202. Fitting sealing ring; 203. Positioning port; 204. Distance scale; 205. Installing sealing ring; 206. Connecting threaded sleeve; 3. Flange; 301. Flange sealing ring; 4. Electric telescopic rod; 5. Sealing moving plate; 501. Sealing gasket; 502. Positioning plate; 503. Positioning rod; 504. Limiting bottom ring; 505. Distance indicator needle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] like Figures 1 to 5 As shown, a sealing assembly includes a sealing chamber 2 installed on an oil production pipeline 1. The sealing chamber 2 is fixedly connected to the oil production pipeline 1 via a flange 3. The sealing chamber 2 has an inlet 201 communicating with the oil production pipeline 1. A symmetrically arranged electric telescopic rod 4 is provided on the left side of the sealing chamber 2. The telescopic end of the electric telescopic rod 4 is located inside the sealing chamber 2 and is connected to a sealing movable plate 5 that fits against the inner wall of the sealing chamber 2. The sealing movable plate 5 can slide left and right inside the sealing chamber 2.

[0025] like Figure 1 As shown, the sealing component in this utility model is similar in structure to existing sealing components. For example, patent CN222141201U discloses a sealing component and an oil wellhead device. The main improvement of this utility model lies in enhancing the sealing effect of the wellhead device. Figures 1 to 5 As shown, in this utility model, a sealing component and wellhead device, during normal pipeline operation, the sealing movable plate 5 is located on the left side of the sealing chamber 2, ensuring that it does not cover the inlet 201, allowing the medium in the oil pipeline 1 to flow normally through the inlet 201. When sealing is required, the operator controls the electric telescopic rod 4 to move the sealing movable plate 5 to the right, gradually covering the inlet 201. Simultaneously, the sealing gaskets 501 on both sides of the sealing movable plate 5 move synchronously with the plate, always adhering to the inner walls of the sealing chamber 2 and in close contact with the sealing ring 202, forming a double seal and completely blocking the medium flow path. During the movement of the sealing movable plate 5, the positioning rod 503 on the positioning plate 502 moves within the positioning port 203. A distance scale 204 is provided on the rear side of the sealing chamber 2, and the distance indicator needle 505 points to the distance scale 204 on the outer side of the chamber in real time. The operator can directly read the sliding distance of the sealing movable plate 5 for precise adjustment.

[0026] like Figure 4 As shown, sealing gaskets 501 that fit the inner walls of the sealing chamber 2 are provided on the front and rear sides of the sealing moving plate 5. A sealing ring 202 that fits the sealing gaskets 501 is provided on the inner side of the sealing chamber 2 at the feed inlet 201.

[0027] Specifically, by providing sealing gaskets 501 that fit the inner walls of the sealing chamber 2 on both sides of the sealing moving plate 5, a movable sealing surface can be formed, which can slide synchronously with the sealing moving plate 5 to seal the gaps generated during the sliding process; and a fitting sealing ring 202 that cooperates with the sealing gasket 501 is provided at the feed inlet 201 on the inner side of the sealing chamber 2, which will cooperate with the sealing gasket 501 to greatly improve the sealing reliability.

[0028] like Figure 4 and Figure 5 As shown, a positioning plate 502 extends from the middle of the left side of the sealing moving plate 5. The positioning plate 502 is located between the two electric telescopic rods 4. A positioning rod 503 extends from the rear side of the positioning plate 502. A positioning port 203 for the positioning rod 503 to move left and right is opened on the rear side of the sealing chamber 2. A distance scale 204 is provided on the rear side of the sealing chamber 2.

[0029] Specifically, when the sealing moving plate 5 moves back and forth with the electric telescopic rod 4, the positioning rod 503 on the positioning plate 502 will move within the positioning port 203, and the rear side of the sealing chamber 2 is provided with a distance scale 204, which can intuitively reflect the real-time position of the sealing moving plate 5, so that the operator can accurately read the sliding distance of the sealing moving plate 5.

[0030] like Figure 5 As shown, a limiting bottom ring 504 is provided on the outer surface of the positioning rod 503. The diameter of the limiting bottom ring 504 is larger than the width of the positioning port 203, and the bottom surface of the limiting bottom ring 504 is attached to the outside of the sealing chamber 2.

[0031] Specifically, by providing a limiting bottom ring 504 on the outer surface of the positioning rod 503, and by ensuring that the diameter of the limiting bottom ring 504 is larger than the width of the positioning opening 203 and that its bottom surface is in contact with the outer side of the sealing chamber 2, the positioning rod 503 can be stably positioned without shaking when the sealing moving plate 5 slides.

[0032] like Figure 5 As shown, the upper and lower ends of the limiting bottom ring 504 are provided with distance indicator needles 505 that point parallel to the distance scale 204, and the bottom surface of the distance indicator needles 505 is attached to the outside of the sealed chamber 2.

[0033] Specifically, by setting distance indicator needles 505 parallel to the distance scale 204 at the upper and lower ends of the limiting bottom ring 504, the relative position of the distance indicator needles 505 and the distance scale 204 is stabilized, allowing the operator to read the position of the sealing moving plate 5 more accurately and further improve the adjustment accuracy; while the bottom surface of the distance indicator needles 505 is attached to the outside of the sealing chamber 2, which can eliminate the tilting of the positioning rod 503 caused by vibration and installation deviation, and improve the structural stability.

[0034] like Figures 2 to 4As shown, a flange sealing ring 301 is provided on the inner side of the flange 3, and an installation sealing ring 205 that fits with the flange sealing ring 301 is provided on the outer side of the sealing chamber 2.

[0035] Specifically, by providing a flange sealing ring 301 on the inner side of the flange 3 and an installation sealing ring 205 that fits the flange sealing ring 301 on the outer side of the sealing chamber 2, the connection gap between the flange 3 and the sealing chamber 2 and the oil pipeline 1 can be effectively sealed, thereby improving the reliability of the overall sealing system.

[0036] like Figures 1 to 3 As shown, a wellhead device includes the sealing assembly described in any one of the above-mentioned claims, and also includes an oil production pipeline 1.

[0037] like Figures 2 to 4 As shown, a connecting threaded sleeve 206 is provided on the outside of the sealed chamber 2 at the feed inlet 201, and a connecting threaded groove 101 that mates with the connecting threaded sleeve 206 is provided on the inside of the oil production pipeline 1.

[0038] Specifically, by providing a connecting threaded sleeve 206 at the feed inlet 201 on the outside of the sealed chamber 2, and a connecting threaded groove 101 that mates with the connecting threaded sleeve 206 on the inside of the oil pipeline 1, a threaded connection can be achieved, which, as a supplement to the flange connection, further improves the connection stability.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A seal assembly characterized by, It includes a sealed chamber (2) installed on the oil production pipeline (1), the sealed chamber (2) is fixedly connected to the oil production pipeline (1) by a flange (3), the sealed chamber (2) is provided with an inlet (201) communicating with the oil production pipeline (1), and the left side of the sealed chamber (2) is provided with an electric telescopic rod (4) symmetrically arranged vertically, the telescopic end of the electric telescopic rod (4) is set in the sealed chamber (2) and connected to a sealing moving plate (5) that fits against the inner wall of the sealed chamber (2), the sealing moving plate (5) can slide left and right in the sealed chamber (2).

2. A seal assembly according to claim 1, wherein, The sealing moving plate (5) is provided with sealing gaskets (501) on the front and rear sides that fit the inner walls of the sealing chamber (2). A sealing ring (202) that fits the sealing gaskets (501) is provided on the inner side of the sealing chamber (2) at the feed inlet (201).

3. A seal assembly according to claim 2, wherein, A positioning plate (502) extends from the middle of the left side of the sealing moving plate (5). The positioning plate (502) is located between the two electric telescopic rods (4). A positioning rod (503) extends from the rear side of the positioning plate (502). A positioning port (203) for the positioning rod (503) to move left and right is opened on the rear side of the sealing chamber (2). A distance scale (204) is provided on the rear side of the sealing chamber (2).

4. A seal assembly according to claim 3, wherein, The outer surface of the positioning rod (503) is provided with a limiting bottom ring (504), the diameter of the limiting bottom ring (504) is greater than the width of the positioning opening (203), and the bottom surface of the limiting bottom ring (504) is attached to the outside of the sealing chamber (2).

5. A seal assembly according to claim 4, wherein, The limiting bottom ring (504) is provided with distance indicator needles (505) that point parallel to the distance scale (204) at both the upper and lower ends, and the bottom surface of the distance indicator needles (505) is attached to the outside of the sealed chamber (2).

6. A seal assembly according to claim 1 wherein, A flange sealing ring (301) is provided on the inner side of the flange (3), and an installation sealing ring (205) that fits against the flange sealing ring (301) is provided on the outer side of the sealing chamber (2).

7. A wellhead installation, characterised in that The sealing assembly, including any one of claims 1-6, further includes an oil production pipeline (1).

8. A wellhead assembly according to claim 7, characterised in that A connecting threaded sleeve (206) is provided on the outside of the sealed chamber (2) at the feed inlet (201), and a connecting threaded groove (101) that mates with the connecting threaded sleeve (206) is provided on the inside of the oil pipeline (1).

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