A shale gas fracturing wellhead device

Abstract

The application discloses a shale gas fracturing wellhead device, a bypass pipeline is arranged on one side of a main pipeline and communicates with the main pipeline, a safety assembly is arranged on the bypass pipeline, the safety assembly comprises an outer shell body, one end of the outer shell body communicates with the main pipeline, a sealing convex groove is arranged in the outer shell body, a first sealing block is arranged on the side, away from the main pipeline, of the sealing convex groove, a top mounting rack is arranged on one side of the first sealing block, and a first spring is arranged between the first sealing block and the top mounting rack. The bypass pipeline is arranged and the safety assembly is arranged on the bypass pipeline; when the pressure in the fracturing well is too large, the pressure is released through the bypass pipeline, the continuous excessive pressure is prevented from acting on the fracturing device, the fracturing device is prevented from being damaged, the excessive pressure pushes the first sealing block, the first spring is extruded, the first sealing block is separated from the sealing convex groove, and the pressure is released; when the pressure is below the upper limit, the pressure cannot open the sealing convex groove and the first sealing block, and the fracturing operation in the fracturing well can be stably performed.

Description

Technical Field

[0001] This invention relates to the field of shale gas extraction technology, specifically to a shale gas fracturing wellhead device. Background Technology

[0002] Fracturing, also known as hydraulic fracturing, is a method used in oil or gas production to create fractures in oil and gas reservoirs using hydraulic force. It artificially creates fractures in the formation, improving the underground flow environment for oil and increasing well production. Fracturing plays a crucial role in improving bottomhole flow conditions, mitigating inter-layer flow, and enhancing reservoir dynamics.

[0003] During the process of delivering fracturing fluid to the underground through a fracturing well, it is necessary to maintain the pressure of the fracturing fluid in the fracturing well at a normal value to ensure the fracturing effect. However, due to the complexity of the underground environment, the pressure in the fracturing well is constantly changing. When the pressure is too high, it is necessary to stop fracturing and release some pressure to prevent the pressure from acting on the fracturing device and causing damage to it. Summary of the Invention

[0004] This invention provides a shale gas fracturing wellhead device to solve the problems mentioned in the background art.

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

[0006] A shale gas fracturing wellhead device includes a main pipeline and a bypass pipeline. The bypass pipeline is located on one side of the main pipeline and is connected to the main pipeline. A safety component is installed on the bypass pipeline. The safety component includes an outer shell. One end of the outer shell is connected to the main pipeline. A sealing groove is provided inside the outer shell. A first sealing block is provided on the side of the sealing groove away from the main pipeline. A top mounting bracket is provided on one side of the first sealing block. A first spring is provided between the first sealing block and the top mounting bracket.

[0007] Preferably, a first sealing gasket is provided on the sealing groove;

[0008] A second sealing gasket is provided on the first sealing block;

[0009] The first sealing gasket and the second sealing gasket are arranged opposite to each other.

[0010] Preferably, a second sealing block is rotatably connected to the first sealing block, a sliding rod is fixedly connected to the second sealing block, a second rotating ring is rotatably connected to the sliding rod, one end of a support rod is rotatably connected to the second rotating ring, and the other end of the support rod is rotatably connected to the cleaning shell.

[0011] The cleaning shell is slidably connected to the connecting rod, the connecting rod is fixedly connected to the rotating frame, and the rotating frame is rotatably connected to the sealing protrusion.

[0012] A third spring is provided between the cleaning shell and the rotating frame, and the third spring is sleeved on the connecting rod.

[0013] Preferably, a trigger rod is slidably connected to the end of the cleaning shell away from the mounting rod, the trigger rod passes through the cleaning shell, a trigger block is fixedly connected to the end of the trigger rod located on the outside of the cleaning shell, and a second spring is provided between the trigger block and the cleaning shell, the second spring being sleeved on the trigger rod;

[0014] The cleaning shell has an opening, and a cleaning head is provided at the opening. The cleaning head is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected inside the cleaning shell. A first torsion spring is provided on the rotating shaft, and the two ends of the first torsion spring are fixedly connected to the cleaning shell and the cleaning head, respectively.

[0015] One end of a second pull rope is fixedly wound around the rotating shaft, and the other end of the second pull rope is fixedly connected to the trigger rod.

[0016] Preferably, the first sealing block is provided with a storage groove.

[0017] Preferably, a bottom mounting bracket is provided inside the outer casing, a sleeve is fixedly connected to the bottom mounting bracket, a first rotating ring is rotatably connected to the sleeve, an impeller is fixedly connected to the first rotating ring, a sliding rod is movably connected inside the sleeve, and the sliding rod is fixedly connected to the second sealing block;

[0018] A plurality of tubes are fixedly connected to the first rotating ring sleeve, and a rod is inserted into each tube. A fourth spring is connected between the end of the rod and the tube, and the rod is fixedly connected to the second rotating ring sleeve.

[0019] Preferably, a sliding ring is rotatably connected to the second rotating ring sleeve, and the sliding ring sleeve is fixedly connected to the sliding rod.

[0020] Preferably, a first movable rod is fixedly connected to the second sealing block, the first movable rod is slidably connected to the top mounting bracket, and the first spring is sleeved on the first movable rod;

[0021] The first sealing block is provided with a toothed disc, which meshes with a gear. The gear is connected to a first rotating rod, and a ratchet assembly that enables the gear to rotate in one direction is provided between the first rotating rod and the gear. The first rotating rod is rotatably connected to a mounting rod, and the mounting rod is fixedly connected to the second sealing block.

[0022] A second torsion spring is provided on the first rotating rod, and the two ends of the second torsion spring are fixedly connected to the mounting rod and the first rotating rod, respectively.

[0023] One end of a first pull rope is fixedly wound around the first rotating rod, and the other end of the first pull rope is fixedly connected to the top mounting bracket.

[0024] Preferably, the main pipeline and the bypass pipeline are both fixed to the pipeline to be connected by fixing components, and a first fixing plate is provided on the main pipeline and the bypass pipeline, and a second fixing plate is provided on the pipeline to be connected;

[0025] A rotating shaft is fixedly connected to the first fixed plate, a rotating mounting block is rotatably connected to the rotating shaft, a handle is rotatably connected to the rotating mounting block, a second rotating rod is rotatably connected to the handle, and a locking component is bolted to the second rotating rod;

[0026] The handle is provided with a limit rod, which is located on one side of the rotating shaft, and the rotating shaft is provided with a hole corresponding to the limit rod.

[0027] Preferably, a sealing gasket is provided between the first fixing plate and the second fixing plate.

[0028] Compared with the prior art, the present invention has at least the following beneficial effects:

[0029] This application, by setting up a bypass pipeline and installing a safety component on the bypass pipeline, allows excessive pressure to be released through the bypass pipeline when the pressure inside the fracturing well becomes too high. This prevents the continuous excessive pressure from acting on the fracturing device and causing damage. The excessive pressure pushes the first sealing block and squeezes the first spring, causing the first sealing block to separate from the sealing groove, thereby releasing the pressure. When the pressure is below the upper limit, the pressure cannot open the sealing groove or the first sealing block, thus enabling stable fracturing operations inside the fracturing well. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0031] Figure 2 This is a schematic cross-sectional view of the safety component structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the internal structure of the safety component of the present invention;

[0033] Figure 4 This is a schematic diagram of the cleaning shell driving structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the mating structure of the first sealing block and the second sealing block of the present invention;

[0035] Figure 6 This is a schematic diagram of the cleaning head drive structure of the present invention;

[0036] Figure 7This is a schematic diagram of the second rotating ring drive structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the gear connection structure of the present invention;

[0038] Figure 9 This is a schematic diagram of the fixed component structure of the present invention;

[0039] Figure 10 This is a partial structural diagram of the fixing component of the present invention.

[0040] In the diagram: 1. Main pipe; 2. Bypass pipe; 3. Safety component; 4. Housing; 5. Sealing groove; 6. First sealing block; 7. Top mounting bracket; 8. First spring; 9. First moving rod; 10. First sealing gasket; 11. Second sealing gasket; 12. Bottom mounting bracket; 13. Sleeve; 14. Impeller; 15. Maintenance access; 16. First rotating ring; 17. Mounting rod; 18. First rotating rod; 19. Gear; 20. Gear disc; 21. First pull rope; 22. Cleaning shell; 23. Sliding rod; 24. Second sealing block; 25. Second rotating... 26. Ring sleeve; 27. Support rod; 28. Connecting rod; 29. ​​Rotating frame; 30. Sliding ring sleeve; 31. Storage slot; 32. Trigger rod; 33. Second spring; 34. Trigger block; 35. Rotating shaft; 36. Cleaning head; 37. First torsion spring; 38. Second pull rope; 39. Insert tube; 40. Insert rod; 41. Ratchet assembly; 42. Second torsion spring; 43. Pipe to be connected; 44. First fixing plate; 45. Second fixing plate; 46. Handle; 47. Rotating mounting block; 48. Second rotating rod; 49. Locking component; 50. Limiting insert rod. Detailed Implementation

[0041] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the invention. They are merely used to distinguish protective components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0042] Example 1:

[0043] Please refer to Figures 1-2A shale gas fracturing wellhead device includes a main pipeline 1 and a bypass pipeline 2. The bypass pipeline 2 is located on one side of the main pipeline 1 and is connected to the main pipeline 1. A safety component 3 is provided on the bypass pipeline 2. The safety component 3 includes an outer shell 4. One end of the outer shell 4 is connected to the main pipeline 1. A sealing groove 5 is provided inside the outer shell 4. A first sealing block 6 is provided on the side of the sealing groove 5 away from the main pipeline 1. A top mounting bracket 7 is provided on one side of the first sealing block 6. A first spring 8 is provided between the first sealing block 6 and the top mounting bracket 7.

[0044] A maintenance channel 15 is provided on one side of the first sealing block 6;

[0045] A first sealing gasket 10 is provided on the sealing groove 5;

[0046] A second sealing gasket 11 is provided on the first sealing block 6;

[0047] The first sealing gasket 10 and the second sealing gasket 11 are arranged opposite to each other.

[0048] The working principle and beneficial effects of the above scheme are as follows:

[0049] This application sets up a bypass pipe 2 and a safety component 3 on the bypass pipe 2. When the pressure in the fracturing well is too high, the excessive pressure will be released through the bypass pipe 2 to prevent the continuous excessive pressure from acting on the fracturing device and causing damage to the fracturing device. The excessive pressure pushes the first sealing block 6 and squeezes the first spring 8, causing the first sealing block 6 to be separated from the sealing groove 5, thereby releasing the pressure. When the pressure is below the upper limit, the pressure cannot open the sealing groove 5 and the first sealing block 6, so that the fracturing operation in the fracturing well can be carried out stably.

[0050] Example 2:

[0051] Please refer to Figures 2-8 Based on Embodiment 1, a second sealing block 24 is rotatably connected to the first sealing block 6, a sliding rod 23 is fixedly connected to the second sealing block 24, a second rotating ring 25 is rotatably connected to the sliding rod 23, one end of a support rod 26 is rotatably connected to the second rotating ring 25, and the other end of the support rod 26 is rotatably connected to the cleaning shell 22.

[0052] The cleaning shell 22 is slidably connected to the connecting rod 27, the connecting rod 27 is fixedly connected to the rotating frame 28, and the rotating frame 28 is rotatably connected to the sealing groove 5;

[0053] A third spring is provided between the cleaning shell 22 and the rotating frame 28, and the third spring is sleeved on the connecting rod 27.

[0054] A trigger rod 31 is slidably connected to the end of the cleaning shell 22 away from the mounting rod 17. The trigger rod 31 passes through the cleaning shell 22. A trigger block 33 is fixedly connected to the end of the trigger rod 31 located outside the cleaning shell 22. A second spring 32 is provided between the trigger block 33 and the cleaning shell 22. The second spring 32 is sleeved on the trigger rod 31.

[0055] The cleaning shell 22 is provided with an opening, and a cleaning head 35 is provided at the opening. The cleaning head 35 is fixedly connected to a rotating shaft 34, and the rotating shaft 34 is rotatably connected inside the cleaning shell 22. A first torsion spring 36 is provided on the rotating shaft 34, and the two ends of the first torsion spring 36 are respectively fixedly connected to the cleaning shell 22 and the cleaning head 35.

[0056] One end of the second pull rope 37 is fixedly wound on the rotating shaft 34, and the other end of the second pull rope 37 is fixedly connected to the trigger rod 31.

[0057] The first sealing block 6 is provided with a storage groove 30.

[0058] A bottom mounting bracket 12 is provided inside the outer casing 4. A sleeve 13 is fixedly connected to the bottom mounting bracket 12. A first rotating ring 16 is rotatably connected to the sleeve 13. An impeller 14 is fixedly connected to the first rotating ring 16. A sliding rod 23 is movably connected inside the sleeve 13. The sliding rod 23 is fixedly connected to the second sealing block 24.

[0059] A plurality of insertion tubes 38 are fixedly connected to the first rotating ring sleeve 16. Insertion rods 39 are inserted into the insertion tubes 38. A fourth spring is connected between the end of the insertion rods 39 and the insertion tubes 38. The insertion rods 39 are fixedly connected to the second rotating ring sleeve 25.

[0060] A sliding ring 29 is rotatably connected to the second rotating ring 25, and the sliding ring 29 is fixedly connected to the sliding rod 23.

[0061] A first moving rod 9 is fixedly connected to the second sealing block 24. The first moving rod 9 is slidably connected to the top mounting bracket 7. The first spring 8 is sleeved on the first moving rod 9.

[0062] The first sealing block 6 is provided with a toothed disc 20, which meshes with a gear 19. The gear 19 is connected to a first rotating rod 18, and a ratchet assembly 40 that enables the gear 19 to rotate in one direction is provided between the first rotating rod 18 and the gear 19. The first rotating rod 18 is rotatably connected to a mounting rod 17, and the mounting rod 17 is fixedly connected to the second sealing block 24.

[0063] A second torsion spring 41 is provided on the first rotating rod 18, and the two ends of the second torsion spring 41 are fixedly connected to the mounting rod 17 and the first rotating rod 18 respectively.

[0064] One end of the first pull rope 21 is fixedly wound on the first rotating rod 18, and the other end of the first pull rope 21 is fixedly connected to the top mounting bracket 7.

[0065] The working principle and beneficial effects of the above scheme are as follows:

[0066] When excessive pressure is released, the liquid pushes the first sealing block 6 away from the sealing groove 5. The liquid flows out from the gap between the sealing groove 5 and the first sealing block 6, reducing the pressure in the fracturing well. When the first sealing block 6 moves away from the sealing groove 5, it will drive the sliding ring 29 and the second rotating ring 25 to move through the second sealing block 24 and the sliding rod 23. The cleaning shell 22 is separated from the receiving groove 30, which drives the support rod 26 to push the cleaning shell 22 until the trigger block 33 contacts the inner wall of the outer shell 4 and continues to squeeze. The trigger rod 31 retracts into the cleaning shell 22 and pulls the second pull rope 37 so that the cleaning head 35 overcomes the resistance of the first torsion spring 36 and moves out and contacts the first sealing gasket 10. When the liquid flows through the impeller 14, it will drive the impeller 14 to rotate, which will then drive the second rotating ring 25 to rotate through the insertion tube 38 and the insertion rod 39. The rotation of the second rotating ring 25 will drive the cleaning shell 22 to rotate through the support rod 26, that is, the cleaning head 35 will rotate and continuously sweep the surface of the first sealing gasket 10 to keep the surface of the first sealing gasket 10 clean.

[0067] As the first sealing block 6 moves away from the sealing groove 5, the first pull rope 21 is wound onto the first rotating rod 18 under the action of the second torsion spring 41. During this process, the first rotating rod 18 rotates while the gear 19 remains stationary due to the action of the ratchet assembly 40. After the pressure is released, the first sealing block 6 approaches the sealing groove 5, the first pull rope 21 extends, causing the first rotating rod 18 to rotate and drive the gear 19 to rotate, thereby causing the first sealing block 6 to rotate. The relative position between the second sealing gasket 11 on the first sealing block 6 and the first sealing gasket 10 on the sealing groove 5 changes, avoiding the problem of the second sealing gasket 11 not being able to seal tightly with the first sealing gasket 10 due to different wear levels caused by different liquid flow settings in the maintenance channel 15.

[0068] Example 3:

[0069] Please refer to Figure 9 , Figure 10 Based on embodiments 1-2, the main pipe 1 and the bypass pipe 2 are both fixed to the pipe to be connected 42 by fixing components. The main pipe 1 and the bypass pipe 2 are each provided with a first fixing plate 43, and the pipe to be connected 42 is provided with a second fixing plate 44.

[0070] A rotating shaft 46 is fixedly connected to the first fixed plate 43. A rotating mounting block 47 is rotatably connected to the rotating shaft 46. A handle 45 is rotatably connected to the rotating mounting block 47. A second rotating rod 48 is rotatably connected to the handle 45. A locking piece 49 is bolted to the second rotating rod 48.

[0071] The handle 45 is provided with a limiting rod 50, which is located on one side of the rotating shaft 46. The rotating shaft 46 is provided with a hole corresponding to the limiting rod 50.

[0072] A sealing gasket is provided between the first fixing plate 43 and the second fixing plate 44.

[0073] The working principle and beneficial effects of the above scheme are as follows:

[0074] When connecting the pipe to be connected 42 to the main pipe 1 and the bypass pipe 2, the first fixing plate 43 and the second fixing plate 44 are attached together, and the handle 45 is rotated so that the locking piece 49 is engaged with the surface of the second fixing plate 44. The handle 45 is rotated again to return the handle 45 to its original position, and the limiting rod 50 is inserted into the hole on the rotating shaft 46 to limit the rotation of the handle 45. This completes the connection of the pipe to be connected 42 to the main pipe 1 and the bypass pipe 2, which is convenient and quick.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A shale gas fracturing wellhead device, characterized in that, It includes a main pipe (1) and a bypass pipe (2). The bypass pipe (2) is located on one side of the main pipe (1) and is connected to the main pipe (1). A safety component (3) is provided on the bypass pipe (2). The safety component (3) includes an outer shell (4). One end of the outer shell (4) is connected to the main pipe (1). A sealing groove (5) is provided inside the outer shell (4). A first sealing block (6) is provided on the side of the sealing groove (5) away from the main pipe (1). A top mounting bracket (7) is provided on the side of the first sealing block (6). A first spring (8) is provided between the first sealing block (6) and the top mounting bracket (7). A first sealing gasket (10) is provided on the sealing groove (5); A second sealing gasket (11) is provided on the first sealing block (6); The first sealing gasket (10) and the second sealing gasket (11) are arranged opposite to each other; A second sealing block (24) is rotatably connected to the first sealing block (6), a sliding rod (23) is fixedly connected to the second sealing block (24), a second rotating ring (25) is rotatably connected to the sliding rod (23), one end of a support rod (26) is rotatably connected to the second rotating ring (25), and the other end of the support rod (26) is rotatably connected to the cleaning shell (22). The cleaning shell (22) is slidably connected to the connecting rod (27), the connecting rod (27) is fixedly connected to the rotating frame (28), and the rotating frame (28) is rotatably connected to the sealing groove (5); A third spring is provided between the cleaning shell (22) and the rotating frame (28), and the third spring is sleeved on the connecting rod (27); A trigger rod (31) is slidably connected to the end of the cleaning shell (22) away from the mounting rod (17). The trigger rod (31) passes through the cleaning shell (22). A trigger block (33) is fixedly connected to the end of the trigger rod (31) located outside the cleaning shell (22). A second spring (32) is provided between the trigger block (33) and the cleaning shell (22). The second spring (32) is sleeved on the trigger rod (31). The cleaning shell (22) has an opening, and a cleaning head (35) is provided at the opening. The cleaning head (35) is fixedly connected to the rotating shaft (34), and the rotating shaft (34) is rotatably connected inside the cleaning shell (22). A first torsion spring (36) is provided on the rotating shaft (34), and the two ends of the first torsion spring (36) are fixedly connected to the cleaning shell (22) and the cleaning head (35) respectively. One end of a second pull rope (37) is fixedly wound on the rotating shaft (34), and the other end of the second pull rope (37) is fixedly connected to the trigger rod (31). A bottom mounting bracket (12) is provided inside the outer casing (4). A sleeve (13) is fixedly connected to the bottom mounting bracket (12). A first rotating ring (16) is rotatably connected to the sleeve (13). An impeller (14) is fixedly connected to the first rotating ring (16). A sliding rod (23) is movably connected inside the sleeve (13). The sliding rod (23) is fixedly connected to the second sealing block (24). A number of tubes (38) are fixedly connected to the first rotating ring (16). A rod (39) is inserted into the tube (38). A fourth spring is connected between the end of the rod (39) and the tube (38). The rod (39) is fixedly connected to the second rotating ring (25). The second rotating ring (25) is rotatably connected to a sliding ring (29), which is fixedly connected to the sliding rod (23). The second sealing block (24) is fixedly connected to the first moving rod (9), the first moving rod (9) is slidably connected to the top mounting bracket (7), and the first spring (8) is sleeved on the first moving rod (9). A toothed disc (20) is provided on the first sealing block (6). The toothed disc (20) meshes with the gear (19). The gear (19) is connected to the first rotating rod (18). A ratchet assembly (40) that enables the gear (19) to rotate in one direction is provided between the first rotating rod (18) and the gear (19). The first rotating rod (18) is rotatably connected to the mounting rod (17). The mounting rod (17) is fixedly connected to the second sealing block (24). A second torsion spring (41) is provided on the first rotating rod (18), and the two ends of the second torsion spring (41) are fixedly connected to the mounting rod (17) and the first rotating rod (18) respectively. One end of the first pull rope (21) is fixedly wound on the first rotating rod (18), and the other end of the first pull rope (21) is fixedly connected to the top mounting bracket (7).

2. The shale gas fracturing wellhead device according to claim 1, characterized in that, The first sealing block (6) is provided with a storage groove (30).

3. The shale gas fracturing wellhead device according to claim 1, characterized in that, The main pipeline (1) and the bypass pipeline (2) are both fixed to the pipeline to be connected (42) by fixing components. The main pipeline (1) and the bypass pipeline (2) are both equipped with a first fixing plate (43), and the pipeline to be connected (42) is equipped with a second fixing plate (44). A rotating shaft (46) is fixedly connected to the first fixed plate (43), a rotating mounting block (47) is rotatably connected to the rotating shaft (46), a handle (45) is rotatably connected to the rotating mounting block (47), a second rotating rod (48) is rotatably connected to the handle (45), and a locking piece (49) is bolted to the second rotating rod (48). A limit rod (50) is provided on the handle (45). The limit rod (50) is located on one side of the rotating shaft (46). The rotating shaft (46) is provided with a hole corresponding to the limit rod (50).

4. A shale gas fracturing wellhead device according to claim 3, characterized in that, A sealing gasket is provided between the first fixing plate (43) and the second fixing plate (44).

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