Fracturing head device for fracturing wellhead

Abstract

The utility model relates to the technical field of fracturing heads for fracturing well mouths, and discloses a fracturing head device for a fracturing well mouth, which comprises a fracturing head, the outer surface of the fracturing head is fixedly connected with four fracturing pipes communicated with the inside of the fracturing head, and the four fracturing pipes are respectively provided with a connecting pipe. Flange plates are fixedly connected to the faces, opposite to the corresponding connecting pipes, of the four fracturing pipes in a sleeving mode, bolts are connected between the corresponding flange plates in a threaded mode, grooves are formed in the faces, away from the fracturing head, of the flange plates on the four fracturing pipes, and four circular grooves are annularly formed in the bottom ends of the interiors of the four grooves. The sealing devices are arranged in the sixteen circular grooves and used for sealing gaps between the two flange plates, the locking devices are arranged, it can be guaranteed that the bolts can still keep the fastening state when subjected to the high pressure and vibration effect, the stable structure and good operation of equipment are maintained, and the sealing effect is good. And the possibility of fault occurrence is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing heads for fracturing wellheads, and specifically relates to a fracturing head device for fracturing wellheads. Background Art

[0002] Fracturing refers to a method in the process of oil or gas production, which uses hydraulic action to form fractures in the oil and gas reservoir, also known as hydraulic fracturing. In the fracturing process of the oil and gas reservoir, a fracturing truck is used to squeeze a high-pressure, large-displacement liquid with a certain viscosity into the oil layer. When many fractures are formed in the oil layer, a proppant (such as quartz sand, etc.) is added to fill the fractures to improve the permeability of the oil and gas reservoir, so as to increase the water injection volume (injection well) or oil production volume (oil well).

[0003] Generally, the fracturing fluid flows into the fracturing head through a connecting pipe. Since the fracturing fluid is a high-pressure fracturing fluid, after the existing fracturing head device operates for a long time, due to the high pressure and vibration during the working process, the bolts between the flange plates are prone to loosen. The most direct impact of the bolt loosening is that it may lead to a decrease in the sealing performance of the fracturing head device, and then cause high-pressure liquid leakage, resulting in potential safety hazards. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the existing technology, the utility model provides a fracturing head device for fracturing wellheads, which has the advantages of improving the sealing performance, etc., and solves the problem that after the existing fracturing head device operates for a long time, due to the high pressure and vibration during the working process, the bolts between the flange plates are prone to loosen. The most direct impact of the bolt loosening is that it may lead to a decrease in the sealing performance of the fracturing head device, and then cause high-pressure liquid leakage, resulting in potential safety hazards.

[0006] (2) Technical Solutions

[0007] To achieve the above purpose of improving the sealing performance, the utility model provides the following technical solutions: A fracturing head device for fracturing wellheads includes a fracturing head. Four fracturing pipes communicating with the inside of the fracturing head are fixedly connected to the outer surface of the fracturing head. Connecting pipes are respectively arranged on the four fracturing pipes. Flange plates are fixedly sleeved on the opposite surfaces of the four fracturing pipes and the corresponding connecting pipes, and bolts are threadedly connected between the corresponding flange plates;

[0008] Among them, grooves are opened on the surfaces of the flange plates on the four fracturing pipes away from the fracturing head. Four circular grooves are annularly opened at the bottom ends of the four grooves. Sealing devices are arranged inside the sixteen circular grooves. The sealing devices are used to seal the gaps between the two flange plates;

[0009] Among them, four through holes are provided on the side of the flange plates on the four connecting pipes close to the fracturing head, and locking devices are arranged in the sixteen through holes for locking the two flange plates.

[0010] Preferably, the sealing device includes a first spring fixedly installed at the center of the inner bottom end of the circular groove. One side of the first spring away from the inner bottom end of the circular groove is fixedly connected with a sliding column, and the sliding column is slidably connected to the inside of the circular groove;

[0011] Among them, one end of the sliding column away from the first spring is fixedly installed with an annular baffle, and the annular baffle is slidably connected to the inner wall of the groove;

[0012] Among them, two sliding grooves are correspondingly provided on the inner wall of the circular groove, and a limiting device for restricting the sliding of the sliding column inside is arranged in each of the two sliding grooves.

[0013] Preferably, the limiting device includes two limiting blocks, both of which are slidably installed inside the sliding groove. The corresponding ends of the two limiting blocks are fixedly connected to both sides of the outer surface of the sliding column, and the two limiting blocks are arranged at one end of the sliding column close to the first spring.

[0014] Preferably, the locking device includes a fixed seat fixedly installed inside the through hole. A T-shaped connecting rod is rotatably connected to the middle position inside the fixed seat. One end of the T-shaped connecting rod close to the fixed seat is fixedly connected with a fixed ring, and the fixed ring is slidably connected to the inner wall of the fixed seat;

[0015] Among them, a flat knob is fixedly connected to the side of the fixed ring away from the T-shaped connecting rod.

[0016] Preferably, a second spring is sleeved on the outer surface of the T-shaped connecting rod and is located inside the fixed seat. One end of the second spring is fixedly connected to the inner bottom end of the fixed seat, and the end of the second spring away from the fixed seat is fixedly connected to the fixed ring;

[0017] Among them, limiting rings are fixedly installed on the outer surface of the T-shaped connecting rod and are located below the fixed seat;

[0018] Among them, a limiting groove is provided at the position of the flange plate of the fracturing pipe corresponding to the T-shaped connecting rod. The cross-sectional shape of the limiting groove is convex, and the T-shaped connecting rod is slidably connected to the inner wall of the limiting groove.

[0019] Preferably, sealing rubber strips are fixedly installed on the opposite surfaces of the two corresponding flange plates;

[0020] Among them, the same sealing rubber strip is fixedly installed on the side of the annular baffle away from the sliding column.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the utility model provides a fracturing head device for a fracturing wellhead, which has the following beneficial effects:

[0023] 1. For the fracturing head device for the fracturing wellhead, rotate the flat knob to rotate the T-shaped connecting rod by 90°. The second spring deforms and rebounds to restore its original state, locking the two flange plates. The locking device can ensure that the bolts can still maintain a tightened state under the action of high pressure and vibration, maintaining the stable structure and good operation of the equipment, reducing the possibility of faults. The locking device ensures the tight connection between the flange plates of the fracturing head device, helps prevent high-pressure liquid from leaking at the connection of the fracturing head device, ensures the normal flow of the working medium and the efficient progress of the fracturing operation.

[0024] 2. For the fracturing head device for the fracturing wellhead, the first spring drives the circular baffle to deform and rebound, sealing the gap between the two flange plates. The main function of the sealing device is to ensure that there is no liquid leakage during the operation of the fracturing head device, and it can also reduce or eliminate this waste, ensuring that the fracturing fluid can accurately and efficiently enter the target formation, thereby improving the efficiency and effect of the fracturing operation. The sealing device can effectively prevent leakage, thereby reducing the wear and corrosion of the equipment and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 is a schematic diagram of the partial sectional structure of the utility model;

[0027] Figure 3 is a schematic diagram of the sectional side view of the utility model;

[0028] Figure 4 is Figure 2 an enlarged schematic diagram of part A in;

[0029] Figure 5 is Figure 3 an enlarged schematic diagram of part B in.

[0030] In the figure: 1. Fracturing head; 2. Fracturing pipe; 3. Connecting pipe; 4. Flange plate; 5. Bolt; 6. Circular groove; 7. First spring; 8. Sliding column; 9. Circular baffle; 10. Limiting block; 11. Chute; 12. Groove; 13. Through hole; 14. Fixed seat; 15. T-shaped connecting rod; 16. Limiting ring; 17. Second spring; 18. Limiting groove; 19. Flat knob; 20. Fixed ring; 21. Sealing strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-5 , the present invention provides a new technical solution: a fracturing head device for a fracturing wellhead, including a fracturing head 1. Four fracturing pipes 2 communicating with the inside thereof are fixedly connected to the outer surface of the fracturing head 1. Connecting pipes 3 are respectively arranged on the four fracturing pipes 2. Flange plates 4 are fixedly sleeved on the opposite surfaces of the four fracturing pipes 2 and the corresponding connecting pipes 3, and bolts 5 are threadedly connected between the corresponding flange plates 4;

[0033] Among them, grooves 12 are opened on the surfaces of the flange plates 4 on the four fracturing pipes 2 away from the fracturing head 1. Four circular grooves 6 are annularly opened at the inner bottom ends of the four grooves 12. Sealing devices are arranged inside the sixteen circular grooves 6, and the sealing devices are used to seal the gap between the two flange plates 4;

[0034] Among them, four through holes 13 are opened on the surfaces of the flange plates 4 on the four connecting pipes 3 close to the fracturing head 1. Locking devices are arranged inside the sixteen through holes 13, and the locking devices are used to lock the two flange plates 4.

[0035] Furthermore, the sealing device includes a first spring 7. The first spring 7 is fixedly installed at the central position of the inner bottom end of the circular groove 6. One side of the first spring 7 away from the inner bottom end of the circular groove 6 is fixedly connected with a sliding column 8, and the sliding column 8 is slidably connected with the inside of the circular groove 6;

[0036] Among them, an annular baffle 9 is fixedly installed at the end of the sliding column 8 away from the first spring 7. The annular baffle 9 is slidably connected with the inner wall of the groove 12. The flange plate 4 on the connecting pipe 3 touches the annular baffle 9. The flange plate 4 presses the annular baffle 9, and the annular baffle 9 drives the sliding column 8 to press the first spring 7 backward. Since the first spring 7 needs to return to its original state, it presses the annular baffle 9 in the reverse direction to seal the gap between the two flange plates 4. By providing the sealing device, the main function of the sealing device is to ensure that there is no liquid leakage during the operation of the fracturing head device, and it can also reduce or eliminate this waste, ensure that the fracturing fluid can accurately and efficiently enter the target formation, thereby improving the efficiency and effect of the fracturing operation. The sealing device can effectively prevent leakage, thereby reducing the wear and corrosion of the equipment and extending the service life of the equipment;

[0037] Among them, two sliding grooves 11 are respectively formed on the inner walls of the circular grooves 6, and a limiting device for restricting the sliding of the sliding column 8 therein is arranged inside each of the two sliding grooves 11.

[0038] Furthermore, the limiting device includes two limiting blocks 10. Both of the two limiting blocks 10 are slidably installed inside the sliding grooves 11. The corresponding ends of the two limiting blocks 10 are fixedly connected to both sides of the outer surface of the sliding column 8, and the two limiting blocks 10 are arranged at one end of the sliding column 8 close to the first spring 7.

[0039] Furthermore, the locking device includes a fixed seat 14. The fixed seat 14 is fixedly installed inside the through hole 13. A T-shaped connecting rod 15 is rotatably connected to the middle position inside the fixed seat 14. One end of the T-shaped connecting rod 15 close to the fixed seat 14 is fixedly connected with a fixed ring 20. The fixed ring 20 is slidably connected to the inner wall of the fixed seat 14;

[0040] Among them, flat-shaped knobs 19 are fixedly connected to the surfaces of the fixed ring 20 away from the T-shaped connecting rod 15.

[0041] Furthermore, a second spring 17 is sleeved on the outer surface of the T-shaped connecting rod 15 and is located inside the fixed seat 14. One end of the second spring 17 is fixedly connected to the inner bottom end of the fixed seat 14, and the end of the second spring 17 away from the fixed seat 14 is fixedly connected to the fixed ring 20;

[0042] Among them, limiting rings 16 are fixedly installed on the outer surface of the T-shaped connecting rod 15 and are located below the fixed seat 14;

[0043] Among them, a limiting groove 18 is formed at the position of the flange 4 of the fracturing pipe 2 corresponding to the T-shaped connecting rod 15. The cross-sectional shape of the limiting groove 18 is convex. The T-shaped connecting rod 15 is slidably connected to the inner wall of the limiting groove 18. The limiting groove 18 on the flange 4 of the fracturing pipe 2 is correspondingly connected to the T-shaped connecting rod 15 on the flange 4 of the connecting pipe 3. By rotating the flat-shaped knob 19, the T-shaped connecting rod 15 is driven to rotate. When the T-shaped connecting rod 15 is rotated by 90°, the second spring 17 deforms and rebounds to restore its original state, connecting the flange 4 of the fracturing pipe 2 and the flange 4 of the connecting pipe 3 together. By providing the locking device, the locking device can ensure that the bolt 5 can still maintain a tightened state under the action of high pressure and vibration, maintain the stable structure and good operation of the equipment, reduce the possibility of faults occurring, and the locking device ensures the tight connection between the flanges 4 of the fracturing head device, which helps to prevent high-pressure liquid from leaking from the connection of the fracturing head device, ensures the normal flow of the working medium and the efficient progress of the fracturing operation.

[0044] Furthermore, sealing rubber strips 21 are fixedly installed on the opposite surfaces of the corresponding two flanges 4;

[0045] Among them, a similar sealing strip 21 is fixedly installed on the side of the annular baffle 9 away from the sliding column 8. The sealing strip 21 can effectively fill the tiny gaps between the flange plates, preventing liquid from leaking from the connection. This double-sealing design significantly enhances the sealing performance of the fracturing head device, ensuring a stable sealing effect under high-pressure or high-flow working conditions. The sealing strip 21 not only plays a sealing role but also enhances the connection stability between the flange plates to a certain extent. They can reduce loosening caused by vibration or impact, improving the structural stability and reliability of the entire fracturing head device.

[0046] Working principle: When using this device, the limiting groove 18 on the flange plate 4 of the fracturing pipe 2 is correspondingly connected to the T-shaped connecting rod 15 on the flange plate 4 of the connecting pipe 3. Rotate the flat knob 19 to drive the T-shaped connecting rod 15 to rotate. Rotate the T-shaped connecting rod 15 by 90°. The second spring 17 deforms and rebounds to its original state, connecting the flange plate 4 of the fracturing pipe 2 and the flange plate 4 of the connecting pipe 3 together. By setting a locking device, the locking device can ensure that the bolt 5 remains tightened under the action of high pressure and vibration, maintaining the stable structure and good operation of the equipment, reducing the possibility of faults. The locking device ensures the tight connection between the flange plates 4 of the fracturing head device, helping to prevent high-pressure liquid from leaking from the connection of the fracturing head device, ensuring the normal flow of the working medium and the efficient progress of the fracturing operation.

[0047] The flange plate 4 on the connecting pipe 3 touches the annular baffle 9. The flange plate 4 squeezes the annular baffle 9, and the annular baffle 9 drives the sliding column 8 to squeeze the first spring 7 backward. Since the first spring 7 wants to return to its original state, it reversely squeezes the annular baffle 9 to seal the gap between the two flange plates 4. By setting a sealing device, the main function of the sealing device is to ensure that no liquid leakage occurs during the operation of the fracturing head device, and it can also reduce or eliminate this waste, ensuring that the fracturing fluid can accurately and efficiently enter the target formation, thereby improving the efficiency and effect of the fracturing operation. The sealing device can effectively prevent leakage, thereby reducing the wear and corrosion of the equipment and extending the service life of the equipment.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fracturing head device for a fracturing wellhead, comprising a fracturing head (1), wherein four fracturing pipes (2) that communicate with the inside thereof are fixedly connected to the outer surface of the fracturing head (1), and connecting pipes (3) are respectively arranged on the four fracturing pipes (2), and the characteristics are as follows: Flanges (4) are fixedly sleeved on the opposite faces of the four fracturing pipes (2) and the corresponding connecting pipes (3), and bolts (5) are threadedly connected between the corresponding flanges (4); Among them, grooves (12) are formed on the side of the flanges (4) on the four fracturing pipes (2) away from the fracturing head (1). Four circular grooves (6) are annularly formed at the inner bottom ends of the four grooves (12). Sealing devices are arranged inside the sixteen circular grooves (6) for sealing the gap between the two flanges (4); Among them, four through holes (13) are formed on the side of the flanges (4) on the four connecting pipes (3) close to the fracturing head (1). Locking devices are arranged inside the sixteen through holes (13) for locking the two flanges (4).

2. The fracturing head device for a fracturing wellhead according to claim 1, wherein: The sealing device includes a first spring (7). The first spring (7) is fixedly installed at the center of the inner bottom end of the circular groove (6). One side of the first spring (7) away from the inner bottom end of the circular groove (6) is fixedly connected with a sliding column (8), and the sliding column (8) is slidably connected to the inside of the circular groove (6); Among them, a circular ring-shaped baffle (9) is fixedly installed at one end of the sliding column (8) away from the first spring (7), and the circular ring-shaped baffle (9) is slidably connected to the inner wall of the groove (12); Among them, two sliding grooves (11) are correspondingly formed on the inner wall of the circular groove (6). Limiting devices for restricting the sliding of the sliding column (8) inside are arranged inside the two sliding grooves (11).

3. The fracturing head device for a fracturing wellhead according to claim 2, characterized in that: The limiting device includes two limiting blocks (10). The two limiting blocks (10) are both slidably installed inside the sliding groove (11). The corresponding ends of the two limiting blocks (10) are fixedly connected to both sides of the outer surface of the sliding column (8), and the two limiting blocks (10) are arranged at one end of the sliding column (8) close to the first spring (7).

4. A fracturing head device for a fracturing wellhead according to claim 1, characterized in that: The locking device includes a fixed seat (14). The fixed seat (14) is fixedly installed inside the through hole (13). A T-shaped connecting rod (15) is rotatably connected to the middle position inside the fixed seat (14). One end of the T-shaped connecting rod (15) close to the fixed seat (14) is fixedly connected with a fixed ring (20), and the fixed ring (20) is slidably connected to the inner wall of the fixed seat (14); Among them, a flat knob (19) is fixedly connected to the side of the fixed ring (20) away from the T-shaped connecting rod (15).

5. The fracturing head device for a fracturing wellhead according to claim 4, characterized in that: A second spring (17) is sleeved on the outer surface of the T-shaped connecting rod (15) and is located inside the fixed seat (14). One end of the second spring (17) is fixedly connected to the inner bottom end of the fixed seat (14), and the end of the second spring (17) away from the fixed seat (14) is fixedly connected to the fixed ring (20); Among them, limiting rings (16) are fixedly installed on the outer surface of the T-shaped connecting rod (15) and are located below the fixed seat (14); Among them, a limiting groove (18) is formed at the position of the flange (4) of the fracturing pipe (2) corresponding to the T-shaped connecting rod (15). The cross-sectional shape of the limiting groove (18) is convex, and the T-shaped connecting rod (15) is slidably connected to the inner wall of the limiting groove (18).

6. The fracturing head device for a fracturing wellhead according to claim 2, characterized in that: Sealing rubber strips (21) are fixedly installed on the opposite surfaces of the two corresponding flange plates (4); Among them, a sealing rubber strip (21) of the same kind is fixedly installed on one side of the annular baffle (9) away from the sliding column (8).

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