Underwater vertical Christmas tree
By designing a protective shell and cleaning mechanism on the underwater vertical wellhead, and using a servo motor to drive a scraper to remove debris, the problem of underwater debris adhesion is solved, ensuring the normal operation and cleanliness of the wellhead.
Patent Information
- Application Number
- CN202520240031.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-16
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-16
AI Technical Summary
Existing oil wellheads are prone to debris buildup in underwater environments, which affects their performance.
An underwater vertical wellhead was designed, employing a protective shell and a cleaning mechanism. A servo motor drives a reciprocating screw to move an L-shaped scraper to remove debris, combined with a rubber elastic tube and filter structure to prevent debris from adhering.
It effectively prevents underwater debris from adhering, maintains the normal operation of the oil well tree, and improves the usability and cleanliness of the oil well tree.
Smart Images
Figure CN223647774U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil wellhead technology, and more specifically, to an underwater vertical oil wellhead. Background Technology
[0002] Subsea production trees are core equipment used in offshore oil and gas development. They are primarily used to suspend the tubing string lowered into the well, seal the annular space between the casing and tubing, control and regulate well production, ensure operational safety, record oil and casing pressure data, conduct testing, and perform dewaxing and other routine production management tasks. As one of the core pieces of equipment in offshore oil and gas development, they serve as a crucial hub connecting oil and gas production lines thousands of meters below the seabed with tens of kilometers of subsea oil and gas transportation pipelines. Like an intelligent "faucet" at the wellhead, they control the rate of oil and gas extraction and monitor and adjust production in real time. Production trees are mainly available in vertical and horizontal types. However, when existing production trees are installed underwater, the complex underwater environment allows debris to easily adhere to them, affecting their operation. Therefore, we have proposed a vertical subsea production tree. Utility Model Content
[0003] In view of the problems mentioned in the background art above, the purpose of this utility model is to provide an underwater vertical oil production tree.
[0004] To solve the above problems, the present invention adopts the following technical solution:
[0005] An underwater vertical wellhead includes a wellhead body with multiple mounting brackets on its side. A lower support plate is placed on the top surface of each mounting bracket. A protective shell is fixedly connected to the top surface of the lower support plate, located outside the wellhead body. A top support plate is fixedly connected to the top of the protective shell. Four cleaning mechanisms are provided between the top and lower support plates. Multiple screw holes are formed on the bottom surface of the lower support plate. Mounting holes are formed on each mounting bracket. Fastening bolts are fitted into the inner cavities of the mounting holes, with the ends of the fastening bolts threaded into the inner cavities of the screw holes. Multiple filter holes and multiple through holes are formed on the outer side of the protective shell. An elastic rubber ring is fixedly fitted into the inner cavity of each through hole, and an elastic ring is fixedly connected to the inner side of the elastic rubber ring.
[0006] As a preferred embodiment of this utility model, the cleaning mechanism includes a lower support fixedly connected to the corner of the lower support plate and an upper support fixedly connected to the corner of the top support plate. A reciprocating screw is rotatably connected between the upper support and the lower support. An L-shaped scraper is threaded onto the outer side of the reciprocating screw. The inner side of the L-shaped scraper is in contact with the outer side of the protective shell. A servo motor is fixedly installed on the top surface of the upper support. The output shaft of the servo motor is connected to the top end of the reciprocating screw.
[0007] As a preferred embodiment of this utility model, the side of the oil well tree body is provided with multiple connecting pipes, and the positions of the connecting pipes correspond to the positions of the perforations.
[0008] As a preferred embodiment of this utility model, the top and bottom surfaces of the L-shaped scraper are fixedly connected with rubber elastic tubes, the ends of the two rubber elastic tubes are respectively connected to the upper support and the lower support, and the rubber elastic tubes are sleeved on the outside of the reciprocating screw.
[0009] As a preferred embodiment of this utility model, a protective cover is fixedly connected to the top surface of the upper support and located outside the servo motor.
[0010] As a preferred embodiment of this utility model, the top of the oil well tree body is provided with multiple lifting rings.
[0011] The advantages of this utility model are:
[0012] (1) In this utility model, the lower support plate, protective shell and top support plate are supported by the mounting frame on the side of the oil production tree body. The protective shell is installed on the outside of the oil production tree body by the cooperation of the mounting holes, screw holes and fastening bolts. The protective shell is used to protect the outside of the oil production tree body to prevent debris in the water from adhering to the outside of the oil production tree body.
[0013] (2) In this utility model, the reciprocating screw and the L-shaped scraper can be driven to move up and down reciprocally through the threaded connection. The L-shaped scraper is used to scrape the outside of the protective shell so as to remove the impurities filtered from the outside of the protective shell and prevent impurities in the water from adhering to the outside of the protective shell. It is practical. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is an exploded view of the overall structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the protective shell of this utility model;
[0017] Figure 4 This is a schematic diagram of the structure of the elastic rubber ring of this utility model.
[0018] Explanation of the labels in the diagram:
[0019] 1. Oil well body; 2. Connecting pipe; 3. Mounting frame; 4. Lower support plate; 5. Protective shell; 6. Top support plate; 7. Cleaning mechanism; 8. Filter hole; 9. Mounting hole; 10. Screw hole; 11. Fastening bolt; 12. Upper support; 13. Lower support; 14. Reciprocating screw; 15. L-shaped scraper; 16. Servo motor; 17. Protective cover; 18. Rubber elastic tube; 19. Lifting ring; 20. Perforation; 21. Elastic rubber ring; 22. Elastic ring. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.
[0023] Example:
[0024] Please see Figure 1-4An underwater vertical wellhead includes a wellhead body 1. Multiple mounting brackets 3 are provided on the side of the wellhead body 1. A lower support plate 4 is placed on the top surface of the mounting brackets 3. A protective shell 5 is fixedly connected to the top surface of the lower support plate 4, located outside the wellhead body 1. A top support plate 6 is fixedly connected to the top of the protective shell 5. Four cleaning mechanisms 7 are provided between the top support plate 6 and the lower support plate 4. Multiple screw holes 10 are provided on the bottom surface of the lower support plate 4. Mounting holes 9 are provided on each mounting bracket 3. Fastening bolts 11 are fitted into the inner cavity of the mounting holes 9. The ends of the fastening bolts 11 are threaded into the inner cavity of the screw holes 10. Multiple filter holes 8 are provided on the outer side of the protective shell 5. Multiple through holes 20 are provided on the outer side of the protective shell 5. An elastic rubber ring 21 is fixedly fitted into the inner cavity of the through hole 20. An elastic ring 22 is fixedly connected to the inner side of the elastic rubber ring 21.
[0025] In this embodiment, the perforation 20 allows the external connecting pipe to extend into the inner side of the protective shell 5 and connect with the tree body 1. The inner cavity of the perforation 20 is sealed by the cooperation of the elastic rubber ring 21 and the elastic ring 22, so as to prevent the perforation 20 from being in a blocked state when it does not pass through the pipe, thus preventing impurities in the water from entering.
[0026] For details, please refer to Figures 1 to 3 The cleaning mechanism 7 includes a lower support 13 fixedly connected to the corner of the lower support plate 4 and an upper support 12 fixedly connected to the corner of the top support plate 6. A reciprocating screw 14 is rotatably connected between the upper support 12 and the lower support 13. An L-shaped scraper 15 is threaded onto the outer side of the reciprocating screw 14. The inner side of the L-shaped scraper 15 is in contact with the outer side of the protective shell 5. A servo motor 16 is fixedly installed on the top surface of the upper support 12. The output shaft of the servo motor 16 is connected to the top end of the reciprocating screw 14.
[0027] In this embodiment, the L-shaped scraper 15 is limited by the fit between the outer side of the protective shell 5 and the inner side of the L-shaped scraper 15, so that the L-shaped scraper 15 can only move along the axial direction of the reciprocating screw 14.
[0028] For details, please refer to Figures 1 to 3 Multiple connecting pipes 2 are provided on the side of the oil well body 1, and the positions of the connecting pipes 2 correspond to the positions of the perforations 20.
[0029] In this embodiment, the oil well body 1 and the external pipeline are connected by the connecting pipe 2.
[0030] For details, please refer to Figures 1 to 3 The top and bottom surfaces of the L-shaped scraper 15 are fixedly connected with rubber elastic tubes 18. The ends of the two rubber elastic tubes 18 are connected to the upper support 12 and the lower support 13 respectively. The rubber elastic tubes 18 are sleeved on the outside of the reciprocating screw 14.
[0031] In this embodiment, a rubber elastic tube 18 is used to protect the reciprocating screw 14, preventing the reciprocating screw 14 from being affected by impurities in the water. At the same time, the rubber elastic tube 18 can expand and contract to ensure that the L-shaped scraper 15 can move up and down smoothly. Meanwhile, there is a space gap between the rubber elastic tube 18 and the reciprocating screw 14, so that the rubber elastic tube 18 will not come into contact with the reciprocating screw 14 during the contraction process.
[0032] For details, please refer to Figure 1 and Figure 3 A protective cover 17 is fixedly connected to the top surface of the upper support 12 and to the outside of the servo motor 16.
[0033] In this embodiment, the servo motor 16 is protected by the protective cover 17 to prevent the servo motor 16 from being affected by water.
[0034] For details, please refer to Figure 1 The top of the oil well tree body 1 is equipped with multiple lifting rings 19.
[0035] In this embodiment, the device is hoisted using the lifting ring 19 so that it can be installed in the water.
[0036] Working principle: In use, first, install the tree body 1 onto the underwater oil production pipeline. Then, place the lower support plate 4, protective shell 5, and top support plate 6 over the outside of the tree body 1. The mounting bracket 3 supports the lower support plate 4, protective shell 5, and top support plate 6. Simultaneously, the lower support plate 4 and mounting bracket 3 are connected through the mounting holes 9, screw holes 10, and fastening bolts 11. This prevents debris in the water from contacting the outside of the tree body 1 through the protective shell 5 and filter holes 8. Then, the tree body... The pipe connected to the main body 1 extends into the inner cavity of the protective shell 5 through the perforation 20, so that the pipe is connected to the connecting pipe 2 on the side of the main body 1. Finally, the servo motor 16 is controlled by the external controller. The servo motor 16 drives the reciprocating screw 14 to rotate. Through the threaded engagement between the reciprocating screw 14 and the L-shaped scraper 15, the L-shaped scraper 15 moves up and down. The L-shaped scraper 15 scrapes off the debris attached to the outside of the protective shell 5, thus preventing the debris from adhering to the outside of the protective shell 5.
[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.
Claims
1. A submersible vertical wellhead, comprising a wellhead body (1), characterized in that: The side of the tree body (1) is provided with multiple mounting brackets (3), and a lower support plate (4) is placed on the top surface of the multiple mounting brackets (3). A protective shell (5) is fixedly connected to the top surface of the lower support plate (4) and located on the outside of the tree body (1). A top support plate (6) is fixedly connected to the top of the protective shell (5). Four cleaning mechanisms (7) are provided between the top support plate (6) and the lower support plate (4). Multiple screw holes (10) are opened on the bottom surface of the lower support plate (4). Mounting holes (9) are provided on the frame (3). Fastening bolts (11) are fitted into the inner cavity of the mounting holes (9). The end of the fastening bolts (11) is threaded into the inner cavity of the screw hole (10). Multiple filter holes (8) are provided on the outer side of the protective shell (5). Multiple through holes (20) are provided on the outer side of the protective shell (5). An elastic rubber ring (21) is fixedly fitted into the inner cavity of the through hole (20). An elastic ring (22) is fixedly connected to the inner side of the elastic rubber ring (21).
2. The underwater vertical wellhead according to claim 1, characterized in that: The cleaning mechanism (7) includes a lower support (13) fixedly connected to the corner of the lower support plate (4) and an upper support (12) fixedly connected to the corner of the top support plate (6). A reciprocating screw (14) is rotatably connected between the upper support (12) and the lower support (13). An L-shaped scraper (15) is threaded onto the outer side of the reciprocating screw (14). The inner side of the L-shaped scraper (15) is in contact with the outer side of the protective shell (5). A servo motor (16) is fixedly installed on the top surface of the upper support (12). The output shaft of the servo motor (16) is connected to the top end of the reciprocating screw (14).
3. The underwater vertical wellhead according to claim 1, characterized in that: The side of the oil well body (1) is provided with multiple connecting pipes (2), and the positions of the connecting pipes (2) correspond to the positions of the perforations (20).
4. The underwater vertical wellhead according to claim 2, characterized in that: The top and bottom surfaces of the L-shaped scraper (15) are fixedly connected with rubber elastic tubes (18), and the ends of the two rubber elastic tubes (18) are respectively connected to the upper support (12) and the lower support (13). The rubber elastic tubes (18) are sleeved on the outside of the reciprocating screw (14).
5. The underwater vertical wellhead according to claim 2, characterized in that: A protective cover (17) is fixedly connected to the top surface of the upper support (12) and to the outside of the servo motor (16).
6. The underwater vertical wellhead according to claim 1, characterized in that: The top of the tree body (1) is provided with multiple lifting rings (19).