Large-drift-diameter fracturing wellhead device

Abstract

The utility model discloses a large-drift-diameter fracturing wellhead device, and relates to the technical field of petroleum production. Comprising a fracturing unit used for controlling the pressure of a wellhead; the top of the quick connection assembly is fixedly connected with the bottom of the fracturing unit, and the quick connection assembly is used for being connected with a fracturing pipe of a wellhead; the outer wall of the sealing assembly is fixedly connected with the inner wall of the quick connecting assembly, the quick connecting assembly is arranged, and a main shell and an auxiliary shell of the quick connecting assembly are designed to be rotationally connected, so that quick opening and closing can be achieved, an operator can conveniently sleeve a wellhead fracturing pipe with the quick connecting assembly, the connecting speed is increased, and the connecting efficiency is improved; the threaded column, the rotating frame and the locking nut are used in cooperation, the main shell and the auxiliary shell can be rapidly tensioned and fixed, complex tools and long-time operation are not needed, the connecting time is saved, and the purpose of the large-drift-diameter fracturing wellhead device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production, in particular to a large-diameter fracturing wellhead device. Background Art

[0002] In the fracturing operation of oil and gas fields, the performance of the wellhead device is crucial for the smooth progress of the fracturing operation. However, the existing fracturing wellhead devices have some shortcomings in practical applications.

[0003] Connecting fracturing tubing to the wellhead is a complex and time-consuming process with traditional wellhead equipment. The connection process may require multiple tools and complex steps, which not only reduces efficiency but can also lead to loose connections due to improper operation, posing safety risks to fracturing operations. Utility Model Content

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the present invention to solve its technical problems is: a large-diameter fracturing wellhead device, comprising: a fracturing unit, the fracturing unit is used to control the pressure of the wellhead, and a wellhead fracturing pipe is arranged at the bottom of the fracturing unit; a quick-connect assembly, the top of the quick-connect assembly is fixedly connected to the bottom of the fracturing unit, and the quick-connect assembly is used to connect the fracturing pipe of the wellhead; a sealing assembly, the outer wall of the sealing assembly is fixedly connected to the inner wall of the quick-connect assembly, and the sealing assembly is used to seal the quick-connect assembly and the fracturing pipe of the wellhead; the quick-connect assembly includes a main shell, the outer wall of the main shell is rotatably connected to a secondary shell through a fixed column, and the outer wall of the fixed column is rotatably connected to the inner wall of the main shell, the inner wall of the top of the main shell is slidably connected to a positioning plate, and the inner wall of the top of the secondary shell is fixedly connected to a limiting rod.

[0005] Preferably, the outer wall of the fixed column is fixedly connected to the bottom of the fracturing unit, the inner wall of the auxiliary shell is rotatably connected to a threaded column, the outer wall of the threaded column is rotatably connected to the inner wall of the auxiliary shell through a rotating frame, and the outer wall of the rotating frame is rotatably connected to the inner wall of the auxiliary shell, the outer wall of the threaded column is threadedly connected to the rotating frame, the side of the threaded column close to the rotating frame is threadedly connected to a locking nut, and the bottom of the main shell is fixedly connected to a limiting plate.

[0006] Preferably, the outer wall of the locking nut contacts the outer wall of the rotating frame, the outer wall of the rotating frame is rotatably connected to the inner wall of the main shell, the outer wall of the positioning plate is fixedly connected with a protrusion, the bottom of the positioning plate contacts the outer wall of the fracturing unit, and the positioning plate limits the position of the fracturing unit.

[0007] Preferably, the outer wall of the protrusion is slidably connected to the outer wall of the limiting rod, the outer wall of the limiting rod is provided with an oblique groove, the outer wall of the positioning plate is fixedly connected to a top spring, and the side of the top spring away from the positioning plate is fixedly connected to the top of the main shell.

[0008] Preferably, the sealing assembly includes a soft tube, the material of the soft tube is soft material, the inner wall of the soft tube is fixedly connected to a guide ring, the inner wall of the soft tube is clamped with a sealing ring, and the sealing ring is linearly arrayed along the central axis of the soft tube, and the outer wall of the soft tube is fixedly connected to the inner wall of the bottom of the fracturing unit.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The utility model is provided with a quick-connect assembly. The main shell and the auxiliary shell of the quick-connect assembly are designed to be connected by rotation, which can be quickly opened and closed, making it convenient for operators to put it on the wellhead fracturing pipe, improving the speed and efficiency of the connection. The coordinated use of the threaded column, the rotating frame and the locking nut can quickly tighten the main shell and the auxiliary shell and fix them, without the need for complicated tools and long-term operation, saving connection time.

[0011] 2. The utility model provides a sealing assembly in which the sealing rings are distributed in a linear array, which can fit tightly against the outer wall of the wellhead fracturing pipe, preventing leakage of fracturing fluid, reducing environmental pollution and safety risks. Under the action of the flow of fracturing fluid, the guide ring pushes the soft tube to further fit against the inner wall of the fracturing pipe, thereby increasing the reliability of the seal and improving the overall sealing performance of the wellhead device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the main view of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 This is a schematic structural diagram of the quick-connect assembly of the utility model;

[0015] Figure 4 It is a structural diagram of the rotating frame of the utility model;

[0016] Figure 5 It is a structural diagram of the positioning plate of the utility model;

[0017] Figure 6 It is a structural diagram of the sealing component of the utility model.

[0018] In the figure: 1. Fracturing unit; 2. Quick-connect assembly; 3. Sealing assembly; 21. Fixing column; 22. Main housing; 23. Auxiliary housing; 24. Limit plate; 25. Positioning plate; 26. Limit rod; 27. Threaded column; 28. Rotating frame; 29. Locking nut; 210. Bump; 211. Top spring; 31. Flexible cylinder; 32. Sealing ring; 33. Guide ring. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications. Example

[0020] See also Figure 1 - Figure 6 The utility model provides a technical solution: a large-diameter fracturing wellhead device, comprising: a fracturing unit 1, the fracturing unit 1 is used to control the pressure of the wellhead; a quick-connect assembly 2, the top of the quick-connect assembly 2 is fixedly connected to the bottom of the fracturing unit 1, and the quick-connect assembly 2 is used to connect the fracturing pipe of the wellhead; a sealing assembly 3, the outer wall of the sealing assembly 3 is fixedly connected to the inner wall of the quick-connect assembly 2, and the sealing assembly 3 is used to seal the quick-connect assembly 2 and the fracturing pipe of the wellhead; the quick-connect assembly 2 includes a main shell 22, the outer wall of the main shell 22 is rotatably connected to the auxiliary shell 23 through a fixed column 21, and the outer wall of the fixed column 21 is rotatably connected to the inner wall of the main shell 22 The inner wall of the top of the main shell 22 is slidably connected to the positioning plate 25, the inner wall of the top of the auxiliary shell 23 is fixedly connected to the limiting rod 26, the outer wall of the fixed column 21 is fixedly connected to the bottom of the fracturing unit 1, the inner wall of the auxiliary shell 23 is rotatably connected to the threaded column 27, the outer wall of the threaded column 27 is threadedly connected to the rotating frame 28, and the side of the threaded column 27 close to the rotating frame 28 is threadedly connected to the locking nut 29. The bottom of the main shell 22 is fixedly connected to the limiting plate 24. When the rotating frame 28 is moved to the appropriate position, it is fixed with the locking nut 29 to further strengthen the connection firmness of the main shell 22 and the auxiliary shell 23 to the wellhead fracturing pipe.

[0021] The outer wall of the locking nut 29 contacts the outer wall of the rotating frame 28, and the outer wall of the rotating frame 28 is rotatably connected to the inner wall of the main shell 22. The outer wall of the positioning plate 25 is fixedly connected with a protrusion 210. When the limiting rod 26 approaches the protrusion 210, it will press the protrusion 210, thereby driving the positioning plate 25 to slide in the direction of the top spring 211. The positioning plate 25 contacts the outer wall of the wellhead fracturing pipe, which plays a role in positioning and fixing. The bottom of the positioning plate 25 contacts the outer wall of the fracturing unit 1, and the outer wall of the protrusion 210 is slidably connected to the outer wall of the limiting rod 26. The outer wall of the positioning plate 25 is fixedly connected with a top spring 211, and the side of the top spring 211 away from the positioning plate 25 is fixedly connected to the top of the main shell 22.

[0022] The sealing assembly 3 includes a soft tube 31, the inner wall of which is fixedly connected to a guide ring 33, the inner wall of which is clamped to a sealing ring 32, and the sealing ring 32 is linearly arrayed along the central axis of the soft tube 31, and the outer wall of the soft tube 31 is fixedly connected to the inner wall of the bottom of the fracturing unit 1.

[0023] Working principle:

[0024] The device mainly consists of a fracturing unit 1, a quick-connect assembly 2 and a sealing assembly 3. The fracturing unit 1 is used to control the pressure at the wellhead to ensure that the fracturing operation is carried out within an appropriate pressure range. It provides stable power for the entire fracturing process by adjusting parameters such as pressure and flow.

[0025] The quick-connect assembly 2 plays a key role in connecting the wellhead fracturing pipe. The quick-connect assembly 2 is mainly composed of a main shell 22, a sub-shell 23, a fixed column 21, a positioning plate 25, a limit rod 26, a threaded column 27, a rotating frame 28 and a locking nut 29. The main shell 22 is rotatably connected to the sub-shell 23 through the fixed column 21. This design allows the main shell 22 and the sub-shell 23 to be relatively opened and closed, which is convenient for connection with the wellhead fracturing pipe. When connection is required, the main shell 22 and the sub-shell 23 are first opened, and then put on the wellhead fracturing pipe. Then, by rotating the sub-shell 23, it is gradually closed with the main shell 22. During this process, the inner wall of the top of the sub-shell 23 is opened. The limiting rod 26 is slidably connected to the protrusion 210 on the positioning plate 25. When the limiting rod 26 approaches the protrusion 210, it will press the protrusion 210, thereby driving the positioning plate 25 to slide in the direction of the top spring 211. The positioning plate 25 contacts the outer wall of the wellhead fracturing pipe, which plays a role in positioning and fixing. At the same time, the threaded column 27 on the inner wall of the auxiliary shell 23 is threadedly connected to the rotating frame 28. By rotating the threaded column 27, the rotating frame 28 can be moved under the action of the thread, thereby pulling the main shell 22 and the auxiliary shell 23 closer. When the rotating frame 28 moves to the appropriate position, it is fixed with a locking nut 29 to further strengthen the connection between the main shell 22 and the auxiliary shell 23 to the wellhead fracturing pipe.

[0026] The sealing assembly 3 mainly includes a soft tube 31, a guide ring 33 and a sealing ring 32. The outer wall of the soft tube 31 is fixedly connected to the inner wall of the bottom of the fracturing unit 1. The sealing ring 32 clamped on the inner wall of the soft tube 31 is distributed in a linear array along the central axis of the soft tube 31. When the quick-connect assembly 2 is connected to the wellhead fracturing pipe, the sealing ring 32 can fit tightly on the outer wall of the wellhead fracturing pipe to prevent leakage of the fracturing fluid. Under the action of the flow of the fracturing fluid, the guide ring 33 will push the soft tube 31 to further fit on the inner wall of the fracturing pipe, which not only increases the sealing performance, but also ensures that the fracturing fluid can smoothly pass through the wellhead device into the formation.

[0027] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A large-diameter fracturing wellhead device, characterized in that: include: A fracturing unit (1), the fracturing unit (1) is used to control the pressure at a wellhead; A quick-connect assembly (2), the top of which is fixedly connected to the bottom of the fracturing unit (1), and the quick-connect assembly (2) is used to connect a fracturing pipe at a wellhead; A sealing assembly (3), the outer wall of the sealing assembly (3) being fixedly connected to the inner wall of the quick-connect assembly (2), and the sealing assembly (3) being used to seal the quick-connect assembly (2) and the fracturing pipe at the wellhead; The quick-connect assembly (2) includes a main housing (22), the outer wall of the main housing (22) is rotatably connected to the auxiliary housing (23) via a fixed column (21), and the outer wall of the fixed column (21) is rotatably connected to the inner wall of the main housing (22), the inner wall of the top of the main housing (22) is slidably connected to a positioning plate (25), and the inner wall of the top of the auxiliary housing (23) is fixedly connected to a limiting rod (26).

2. The large-diameter fracturing wellhead device according to claim 1, characterized in that: The outer wall of the fixed column (21) is fixedly connected to the bottom of the fracturing unit (1); the inner wall of the auxiliary housing (23) is rotatably connected to a threaded column (27); the outer wall of the threaded column (27) is threadedly connected to a rotating frame (28); a locking nut (29) is threadedly connected to the side of the threaded column (27) close to the rotating frame (28); and the bottom of the main housing (22) is fixedly connected to a limiting plate (24).

3. The large-diameter fracturing wellhead device according to claim 2, characterized in that: The outer wall of the locking nut (29) contacts the outer wall of the rotating frame (28), the outer wall of the rotating frame (28) is rotatably connected to the inner wall of the main housing (22), the outer wall of the positioning plate (25) is fixedly connected with a protrusion (210), and the bottom of the positioning plate (25) contacts the outer wall of the fracturing unit (1).

4. The large-diameter fracturing wellhead device according to claim 3, characterized in that: The outer wall of the protrusion (210) is slidably connected to the outer wall of the limiting rod (26), and the outer wall of the positioning plate (25) is fixedly connected to a top spring (211). The side of the top spring (211) away from the positioning plate (25) is fixedly connected to the top of the main shell (22).

5. The large-diameter fracturing wellhead device according to claim 1, characterized in that: The sealing assembly (3) comprises a soft cylinder (31), the inner wall of the soft cylinder (31) is fixedly connected to a guide ring (33), the inner wall of the soft cylinder (31) is clamped with a sealing ring (32), and the sealing ring (32) is linearly arrayed along the central axis of the soft cylinder (31).

6. The large-diameter fracturing wellhead device according to claim 5, characterized in that: The outer wall of the flexible cylinder (31) is fixedly connected to the inner wall of the bottom of the fracturing unit (1).

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