Wellhead fracturing device for petroleum drilling and production

Abstract

The utility model relates to the technical field of oil exploitation, and discloses an oil drilling and production wellhead fracturing device which comprises a bottom plate, a plurality of outer columns are fixedly connected to the periphery of the top side of the bottom plate, a machine box is fixedly connected to the left ends of the outer columns, a plurality of metal boxes are fixedly connected to the top side of the bottom plate, and box doors are rotationally connected to the right sides of the metal boxes. The top ends of the front side and the rear side of the box door are rotationally connected with connecting blocks. According to the utility model, the motor drives the chain wheel, the toothed chain and the driven gear to realize multi-stage transmission, so that the plurality of screw rods and the positioning cones are synchronously driven to be quickly inserted into the ground, and a distributed positioning structure is formed. According to the design, the accurate transmission characteristic of gear meshing is utilized, automatic rapid positioning of the device is achieved, compared with traditional manual piling positioning, the positioning efficiency is obviously improved, vibration and counter-acting force during fracturing can be effectively resisted through multi-point rigid supporting, and the safety and reliability of petroleum drilling and production fracturing operation are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, and in particular to an oil drilling wellhead fracturing device. Background Technology

[0002] In the field of oil drilling and production, fracturing is a key technology for enhancing oil and gas production. The stability of its equipment and its operational efficiency directly affect the economics and safety of oil and gas field development. With the increasing proportion of deep oil and gas reservoirs being developed, fracturing operations face higher pressure loads and more complex geological conditions. Traditional fracturing devices, due to their low positioning efficiency and cumbersome maintenance, are unable to meet the demands of modern drilling for rapid response and continuous operation. Therefore, developing a fracturing device with automated positioning, high-efficiency vibration resistance, and convenient maintenance has become an important direction for improving the efficiency of core oil drilling and production operations.

[0003] Existing fracturing units at oil drilling wellheads suffer from three major technical shortcomings: First, positioning relies on manual operation, involving manually screwing in bolts or driving piles for fixation. Positioning a single unit is time-consuming, and simultaneous positioning at multiple points is difficult, leading to uneven stress and shaking during high-pressure fracturing. Statistics show that traditional units have a displacement failure rate as high as 25%, requiring frequent shutdowns for adjustments. Second, maintenance procedures are complex. Pumps, valves, and other components inside the metal casing are bolted, requiring the removal of more than 10 bolts during a single maintenance, resulting in significant time consumption. Third, vibration resistance is insufficient. Traditional single-point positioning structures cannot effectively withstand the high-frequency vibrations generated during fracturing, leading to increased rates of loose and damaged equipment parts and an average annual increase in maintenance costs of approximately 30%. For example, in a certain oilfield, traditional fracturing units used in deep shale gas fracturing frequently experienced fracturing fluid leaks due to insecure positioning, with each incident causing direct economic losses exceeding 100,000 yuan. The low level of automation, inefficient maintenance, and poor structural stability of existing technologies urgently require breakthroughs through mechanical transmission innovation and modular design. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an oil drilling and production wellhead fracturing device. This device aims to solve the problems of inefficient positioning, cumbersome maintenance, poor vibration resistance, and easy displacement that lead to operation interruption and safety risks in existing oil drilling and production wellhead fracturing devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An oil drilling and production wellhead fracturing device includes a base plate. Multiple outer columns are fixedly connected to the top four sides of the base plate. A housing is fixedly connected to the left end of each outer column. Multiple metal boxes are fixedly connected to the top side of the base plate. A door is rotatably connected to the right side of each metal box. Connecting blocks are rotatably connected to the top of both the front and rear sides of the door. A fixing rod is fixedly connected to the top of each connecting block. An installation strip is fixedly connected to the right end of the top side of each metal box. Sliding grooves are provided on both the left and right sides of the installation strip. Limiting components are provided at both the front and rear ends of the outer wall of the installation strip. A transmission groove is provided inside the base plate. A positioning component is provided inside each outer column. A fracturing pump unit is installed inside each metal box. An injection pipe is fixedly connected to the bottom side of the fracturing pump unit, and the bottom end of the injection pipe penetrates the bottom side of the base plate.

[0007] Furthermore, the limiting component includes a limiting block, which is slidably connected to the outer wall of the mounting strip. A connecting plate is fixedly connected inside the limiting block, and sliders are fixedly connected to both the left and right ends of the inner wall of the limiting block. The sliders are located inside the groove.

[0008] Furthermore, springs are provided on both the front and rear sides of the mounting strip, with the near ends of the springs at both ends connected to the front and rear sides of the mounting strip, and the far ends of the springs at both ends connected to the near sides of the connecting plates at both ends.

[0009] Furthermore, the spring is internally provided with a telescopic rod, one end of which is connected to the connecting plate and the other end of which is connected to the mounting strip.

[0010] Furthermore, the base plate has a transmission groove inside, and multiple driven gears are rotatably connected inside the transmission groove. The multiple driven gears are connected by a toothed chain.

[0011] Furthermore, the positioning component includes a screw, a positioning cone is fixedly connected to the bottom side of the screw, the screw is located inside the outer column, and the screw is threadedly connected to the driven gear.

[0012] Furthermore, a motor is installed inside the chassis, a rotating rod is fixedly connected to the drive end of the motor, and a sprocket is fixedly connected to the bottom end of the outer wall of the rotating rod, the sprocket meshing with the toothed chain.

[0013] Furthermore, multiple support shells are fixedly connected to the bottom side of the base plate, and the positioning cone is located inside the support shell.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, a multi-stage transmission system consisting of a motor-driven sprocket, gear chain, and driven gear synchronously drives multiple screws and positioning cones to quickly insert into the ground, forming a distributed positioning structure. This design utilizes the precise transmission characteristics of gear meshing to achieve automated and rapid positioning of the device, significantly improving efficiency compared to traditional manual piling positioning. Furthermore, the multi-point rigid support effectively resists vibrations and reaction forces during fracturing, significantly enhancing the safety and reliability of oil drilling and fracturing operations.

[0016] 2. In this utility model, the sliding limit block releases the locking of the fixed rod by compressing the spring through the connecting plate, allowing the box door to be quickly opened for maintenance of the internal components of the metal box. The spring limit structure achieves "one-click unlocking" through mechanical linkage, avoiding the cumbersome process of disassembling each component individually when using traditional bolt fixing. This design reduces downtime and minimizes component wear caused by frequent disassembly, making it particularly suitable for emergency maintenance needs in high-pressure operating environments and ensuring the continuity of drilling and production operations. Attached Figure Description

[0017] Figure 1 This is a perspective view of the oil drilling and production wellhead fracturing device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the installation strip structure of the oil drilling and production wellhead fracturing device proposed in this utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the internal structure of the oil drilling and production wellhead fracturing device proposed in this utility model;

[0021] Figure 5 This is a schematic diagram of the positioning cone structure of the oil drilling and fracturing device proposed in this utility model.

[0022] Legend:

[0023] 1. Base plate; 2. Outer column; 3. Chassis; 4. Metal box; 5. Connecting block; 6. Screw; 7. Fixing rod; 8. Box door; 9. Support shell; 10. Injection pipe; 11. Mounting strip; 12. Limiting block; 13. Sliding block; 14. Slide groove; 15. Telescopic rod; 16. Spring; 17. Connecting plate; 18. Motor; 19. Fracturing pump set; 20. Rotating rod; 21. Sprocket; 22. Toothed chain; 23. Positioning cone; 24. Driven gear. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 , Figure 4 and Figure 5 This utility model provides an embodiment of an oil drilling and production wellhead fracturing device, comprising a base plate 1, multiple outer columns 2 fixedly connected around the top side of the base plate 1, a housing 3 fixedly connected to the left end of the outer columns 2, multiple metal boxes 4 fixedly connected to the top side of the base plate 1, a door 8 rotatably connected to the right side of the metal boxes 4, connecting blocks 5 rotatably connected to the top of the front and rear sides of the door 8, a fixing rod 7 fixedly connected to the top side of the connecting blocks 5, an installation strip 11 fixedly connected to the right end of the top side of the metal boxes 4, sliding grooves 14 provided on both the left and right sides of the installation strip 11, limit blocks 12 provided at both the front and rear ends of the outer wall of the installation strip 11, a transmission groove provided inside the base plate 1, a screw 6 provided inside the outer columns 2, and a drive mechanism installed inside the metal boxes 4. A fracturing pump unit 19 is provided, with an injection pipe 10 fixedly connected to its bottom side. The bottom end of the injection pipe 10 penetrates the bottom side of the base plate 1. A transmission groove is provided inside the base plate 1, and multiple driven gears 24 are rotatably connected inside the transmission groove. The multiple driven gears 24 are connected by a toothed chain 22. A positioning cone 23 is fixedly connected to the bottom side of the screw 6. The screw 6 is located inside the outer column 2 and is threadedly connected to the driven gears 24. A motor 18 is installed inside the housing 3. A rotating rod 20 is fixedly connected to the drive end of the motor 18. A sprocket 21 is fixedly connected to the bottom end of the outer wall of the rotating rod 20. The sprocket 21 meshes with the toothed chain 22. Multiple support shells 9 are fixedly connected to the bottom side of the base plate 1, and the positioning cone 23 is located inside the support shell 9.

[0026] Specifically, when using this oil drilling and production wellhead fracturing device, the operation process is designed around stable positioning and convenient maintenance. First, the base plate 1 is placed at the wellhead, and the injection pipe 10 is inserted into the well. The motor 18 is started to drive the rotating rod 20 and the sprocket 21 to rotate. Through the meshing transmission of the sprocket and the toothed chain 22, and the toothed chain and the driven gear 24, multiple screws 6 and the positioning cone 23 are driven to move down synchronously, so that the positioning cone is inserted into the ground, forming a rigid positioning structure with multi-point support. This effectively resists the recoil force generated during fracturing, avoids the device from shaking and shifting, and ensures the stability and safety of fracturing operations.

[0027] Reference Figure 1-3The limiting block 12 is slidably connected to the outer wall of the mounting strip 11. A connecting plate 17 is fixedly connected inside the limiting block 12. Slider 13 is fixedly connected to both the left and right ends of the inner wall of the limiting block 12. The slider 13 is located inside the slide groove 14. Springs 16 are provided on both the front and rear sides of the mounting strip 11. The near ends of the two springs 16 are connected to the front and rear sides of the mounting strip 11 respectively. The far ends of the two springs 16 are connected to the near side of the connecting plate 17 respectively. A telescopic rod 15 is provided inside the spring 16. One end of the telescopic rod 15 is connected to the connecting plate 17 and the other end is connected to the mounting strip 11.

[0028] Specifically, after positioning is completed, the fracturing pump unit 19 is started to inject fracturing fluid into the well through the injection pipe. When it is necessary to inspect and maintain the components inside the metal box 4, the sliding limit block 12 releases the lock on the fixed rod 7 by compressing the spring 16 through the connecting plate 17, allowing the box door 8 to be opened quickly for inspection and maintenance of key components such as the internal pump unit and valves. This device achieves automated positioning through gear transmission and simplifies the maintenance process by combining the spring limit structure. It not only improves the efficiency of oil drilling and fracturing operations but also reduces the risk of downtime due to device relocation or inconvenient maintenance, making it suitable for high-pressure, high-load drilling and production scenarios.

[0029] Working principle: In use, first place the base plate 1 at the wellhead and extend the injection pipe 10 into the wellhead. Then, start the motor 18 to drive the rotating rod 20 and sprocket 21 to rotate. Since the sprocket 21 and the toothed chain 22 mesh with each other, and the toothed chain 22 meshes with multiple driven gears 24, when the motor 18 drives the sprocket 21 to rotate, it will simultaneously drive multiple driven gears 24 to rotate, thereby driving multiple screws 6 and positioning cones 23 to move downwards, so that the positioning cones 23 are inserted into the ground, thereby positioning the entire device and preventing the device from shaking or moving during the fracturing process. Then, the fracturing pump group 19 can be started to fracture the well through the injection pipe 10. When it is necessary to inspect and maintain the parts inside the metal box 4, first slide the limit block 12 and compress the spring 16 through the connecting plate 17, and at the same time release the limit block 12 from the fixed rod 7, so that the box door 8 can be opened quickly to inspect and maintain the parts inside the metal box 4.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A fracturing device for oil drilling and production wellheads, characterized in that, Includes a base plate (1), with multiple outer columns (2) fixedly connected around the top side of the base plate (1). A chassis (3) is fixedly connected to the left end of each outer column (2). Multiple metal boxes (4) are fixedly connected to the top side of the base plate (1). A door (8) is rotatably connected to the right side of each metal box (4). Connecting blocks (5) are rotatably connected to the top of both the front and rear sides of the door (8). A fixing rod (7) is fixedly connected to the top side of each connecting block (5). The right end of the top side of the metal box (4) is fixedly connected to... There is an installation strip (11), and sliding grooves (14) are provided on both the left and right sides of the installation strip (11). Limiting components are provided at both the front and rear ends of the outer wall of the installation strip (11). A transmission groove is provided inside the base plate (1). A positioning component is provided inside the outer column (2). A fracturing pump group (19) is installed inside the metal box (4). An injection pipe (10) is fixedly connected to the bottom side of the fracturing pump group (19). The bottom end of the injection pipe (10) penetrates the bottom side of the base plate (1).

2. The oil drilling and production wellhead fracturing device according to claim 1, characterized in that, The limiting component includes a limiting block (12), which is slidably connected to the outer wall of the mounting strip (11). A connecting plate (17) is fixedly connected inside the limiting block (12). Slider blocks (13) are fixedly connected to both the left and right ends of the inner wall of the limiting block (12). The sliders (13) are located inside the groove (14).

3. The oil drilling and production wellhead fracturing device according to claim 2, characterized in that: Springs (16) are provided on both the front and rear sides of the mounting strip (11). The near ends of the springs (16) at both ends are connected to the front and rear sides of the mounting strip (11), and the far ends of the springs (16) at both ends are connected to the near side of the connecting plates (17) at both ends.

4. The oil drilling and production wellhead fracturing device according to claim 3, characterized in that: The spring (16) has a telescopic rod (15) inside. One end of the telescopic rod (15) is connected to the connecting plate (17), and the other end is connected to the mounting strip (11).

5. The oil drilling and production wellhead fracturing device according to claim 1, characterized in that: The base plate (1) has a transmission groove inside, and multiple driven gears (24) are rotatably connected inside the transmission groove. The multiple driven gears (24) are connected by a toothed chain (22).

6. The oil drilling and production wellhead fracturing device according to claim 5, characterized in that, The positioning assembly includes a screw (6), a positioning cone (23) is fixedly connected to the bottom side of the screw (6), the screw (6) is located inside the outer column (2), and the screw (6) is threadedly connected to the driven gear (24).

7. The oil drilling and production wellhead fracturing device according to claim 6, characterized in that: The machine casing (3) is equipped with a motor (18), and a rotating rod (20) is fixedly connected to the drive end of the motor (18). A sprocket (21) is fixedly connected to the bottom end of the outer wall of the rotating rod (20), and the sprocket (21) meshes with the toothed chain (22).

8. The oil drilling and production wellhead fracturing device according to claim 7, characterized in that: The bottom side of the base plate (1) is fixedly connected to a plurality of support shells (9), and the positioning cone (23) is located inside the support shell (9).

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