Acid fracturing ball guide device

Abstract

The invention discloses an acid fracturing ball throwing guide device, comprising a fracturing pipe, a storage tank and a shell, wherein a motor is fixedly connected to the back of the storage tank, and a fixed rod is fixedly connected to the output end of the motor, and the invention relates to the technical field of oilfield fracturing. The acid fracturing ball throwing guide device stores balls in the storage tank, and does not require manual single throwing, which facilitates the flexible storage and throwing of balls, reduces the need for staff to repeatedly throw balls into the fracturing pipe, increases the workload of staff, and improves the throwing efficiency of the acid fracturing ball throwing guide device during use to a certain extent. In addition, a shell is provided above the fracturing pipe, and a sealing plug with a through hole is provided inside the shell. The ball is thrown into the fracturing pipe by using the descending sealing plug, and the fracturing pump can be kept for throwing, avoiding the switch of the pressure valve each time the ball is thrown, and improving the safety of the ball throwing.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield fracturing, in particular to an acidizing fracturing ball-throwing guide device. Background Art

[0002] The acid treatment process of squeezing acid from the formation under a pressure sufficient to crack the formation or open the existing cracks in the formation is called fracturing acidizing. It can be divided into pre-fluid acid fracturing and ordinary acid fracturing. Fracturing acidizing is mainly used to plug oil and gas wells in deep or low permeability areas. Fracturing acidizing with an injection pressure higher than the oil layer fracture pressure is usually called acid fracturing. Acidizing hydraulic pressure is a widely used measure for increasing production and injection in limestone reservoirs in oil fields at home and abroad. It has now begun to become an important means of well completion. With the large-scale application of horizontal well staged fracturing technology in China, horizontal well fracturing transformation technology in low permeability reservoirs has made significant progress. The breakthrough has significantly improved the development efficiency and recovery rate of shale gas. At present, the oil production and collection method of each oil field is to use a single well pipeline to transport oil to a gathering station or a centralized processing station. Due to the large temperature difference between the ground and the underground, after the crude oil is pumped out of the ground, a large amount of wax will soon precipitate and adhere to the inner wall of the oil pipeline. If it is not cleaned in time, the oil pipeline will be blocked. The current wax cleaning method is to put a cleaning ball with a diameter slightly smaller than the pipe diameter into the pipeline, and rely on the pressure of the fluid in the pipeline to push the cleaning ball away. As the ball moves, the wax attached to the pipe wall that hinders the passage of the fluid will be pushed away, thereby keeping the pipeline unobstructed.

[0003] At present, the domestic horizontal well staged fracturing technology is mainly operated by manual high-pressure wellhead tools. The efficiency of manual ball throwing is low, the workload is large, and there are problems such as cumbersome operation, high labor intensity, low reliability, and great safety hazards. Especially in the process of ball throwing, due to the lack of good sealing and guiding measures in the conveying pipeline, it is easy to cause the ball to stay or the pipeline to be damaged, affecting work efficiency and causing economic losses. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an acid fracturing ball-dropping guide device, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an acid fracturing ball-casting guide device, comprising a fracturing pipe, a storage tank and a shell, the back of the storage tank is fixedly connected to a motor, and the output end of the motor is fixedly connected to a fixing rod, the output end of the fixing rod penetrates the storage tank and extends to the outside of the storage tank, the surface of the fixing rod is fixedly connected to a pushing plate, and the bottom of the inner wall of the storage tank is fixedly connected to a U-shaped plate, a curved plate is rotatably connected between the two sides of the inner wall of the U-shaped plate, and one side of the storage tank is connected to one side of the shell through an inclined pipe;

[0006] The top of the shell is fixedly connected with a vertical plate, the surface of the vertical plate is provided with a circular plate, and the two sides of the inner wall of the circular plate are fixedly connected with first teeth, the middle part of the vertical plate is rotatably connected with a movable rod, and one end of the movable rod is fixedly connected with a half gear meshing with the first teeth, the bottom of the circular plate is fixedly connected with a first vertical rod, the bottom of the first vertical rod penetrates the shell and extends to the interior of the shell, the side of the first vertical rod extending to the interior of the shell is fixedly connected with a sealing plug, and a through hole is provided in the interior of the sealing plug, the end of the fixed rod extending to the outside of the storage tank and the other end of the movable rod are fixedly connected with pulleys, and the surfaces of the two pulleys are connected by a belt drive.

[0007] Preferably, the top of the circular plate is fixedly connected to a second vertical rod, and the top and bottom of the vertical plate surface are fixedly connected to positioning rings, and the surfaces of the first vertical rod and the second vertical rod are slidably connected to a positioning ring respectively.

[0008] Preferably, a through groove is provided at the top of the surface of the fracturing pipe and at a position corresponding to the outer shell, and the diameter of the through hole is consistent with the diameter of the inclined pipe.

[0009] Preferably, both sides of the top of the inner wall of the fracturing pipe are fixedly connected with connecting blocks, and a cross bar is rotatably connected between the two connecting blocks, and a spiral plate is fixedly connected to the surface of the cross bar.

[0010] Preferably, a feed hopper is fixedly connected to the top of the storage tank, and a spring is fixedly connected between one side of the curved plate and the bottom of the inner wall of the storage tank, and there are three push plates.

[0011] Preferably, a support seat is fixedly connected to the bottom of the storage tank, and the bottom of the support seat is fixedly connected to the top of the surface of the fracturing pipe.

[0012] Preferably, one end of the cross bar is fixedly connected to a gear, and grooves are provided inside the sealing plug and in front and behind the through hole, and one side of the inner wall of the groove is fixedly connected to a second tooth meshing with the gear.

[0013] Preferably, the half gear is located in the middle of the circular plate, the number of the cross bars is two, and the number of the spiral plates on a single cross bar is five.

[0014] The present invention provides an acid fracturing ball-dropping guide device. Compared with the prior art, it has the following beneficial effects:

[0015] The acid fracturing ball-dropping guide device is fixedly connected to a motor through the back of the storage tank, and the output end of the motor is fixedly connected to a fixing rod, the output end of the fixing rod penetrates the storage tank and extends to the outside of the storage tank, the surface of the fixing rod is fixedly connected to a pushing plate, and the bottom of the inner wall of the storage tank is fixedly connected to a U-shaped plate, a curved plate is rotatably connected between the two sides of the inner wall of the U-shaped plate, one side of the storage tank is connected to one side of the outer shell through an inclined pipe, the balls are stored in the storage tank, no manual single-time dropping of the balls is required, the flexible storage and dropping of the balls is facilitated, the need for staff to repeatedly drop the balls into the fracturing pipe is reduced, and the workload of the staff is increased, and the dropping efficiency of the acid fracturing ball-dropping guide device during use is improved to a certain extent, and above the fracturing pipe, a A shell is provided, and a sealing plug with a through hole is arranged inside the shell. The ball is dropped into the interior of the fracturing pipe by means of the descending sealing plug. The ball dropping is reliable and the fracturing pump can be kept dropping the ball, thus avoiding the need to switch the pressurized valve each time the ball is dropped, thereby improving the safety of the ball dropping, reducing the labor intensity and the operation time, and reducing the safety risk of the ball dropping operation. The pushing plate inside the storage tank continuously pushes the curved plate, which will discharge the balls inside the storage tank one by one out of the storage tank. At the same time, the sealing plug can intermittently send the balls to the interior of the fracturing pipe by moving up and down. When the sealing plug descends to the interior of the fracturing pipe, it can drive the spiral plate inside the fracturing pipe to rotate, thereby accelerating the flow rate of the fluid inside the fracturing pipe, so that the fluid inside the fracturing pipe brings the ball at the through hole inside the sealing plug into the formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the structure of the present invention;

[0017] Figure 2 is a cross-sectional view of the structure of the present invention;

[0018] Figure 3 It is a state diagram of the present invention when delivering a ball;

[0019] Figure 4 is a cross-sectional view of the storage tank structure of the present invention;

[0020] Figure 5 It is a rear view of the storage tank structure of the present invention;

[0021] Figure 6 A side view of the internal structure of the piston of the present invention;

[0022] Figure 7 It is a side view of the return plate structure of the present invention;

[0023] Figure 8 For the present invention Figure 3 A magnified view of the part in the middle.

[0024] In the figure: 1. fracturing pipe; 2. storage tank; 3. shell; 4. motor; 5. fixing rod; 6. pushing plate; 7. U-shaped plate; 8. curved plate; 9. inclined tube; 10. vertical plate; 11. return plate; 12. first tooth; 13. movable rod; 14. half gear; 15. first vertical rod; 16. sealing plug; 17. through hole; 18. pulley; 19. belt; 20. second vertical rod; 21. positioning ring; 22. through groove; 23. connecting block; 24. cross bar; 25. spiral plate; 26. feed hopper; 27. spring; 28. support seat; 29. ​​gear; 30. groove; 31. second tooth. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-8 The present invention provides a technical solution: an acid fracturing ball pitching guide device, comprising a fracturing pipe 1, a storage tank 2 and a shell 3, a motor 4 is fixedly connected to the back of the storage tank 2, and a fixing rod 5 is fixedly connected to the output end of the motor 4, the output end of the fixing rod 5 passes through the storage tank 2 and extends to the outside of the storage tank 2, a pushing plate 6 is fixedly connected to the surface of the fixing rod 5, and a U-shaped plate 7 is fixedly connected to the bottom of the inner wall of the storage tank 2, a curved plate 8 is rotatably connected between the two sides of the inner wall of the U-shaped plate 7, and one side of the storage tank 2 is connected to one side of the shell 3 through an inclined pipe 9;

[0027] Specifically, initially, the feed port of the inclined tube 9 is connected to the through hole 17 inside the sealing plug 16, and the sphere inside the storage tank 2 enters the through hole 17 inside the sealing plug 16 through the inclined tube 9;

[0028] Specifically, the curved plate 8 is provided to prevent the ball from being discharged from the storage tank 2 all the time, and the three push plates 6 are provided to indirectly push the push plates 6 so that the ball inside the storage tank 2 is intermittently discharged from the storage tank 2, facilitating subsequent pitching operations.

[0029] A vertical plate 10 is fixedly connected to the top of the shell 3, a circular plate 11 is provided on the surface of the vertical plate 10, and first teeth 12 are fixedly connected to both sides of the inner wall of the circular plate 11, a movable rod 13 is rotatably connected to the middle of the vertical plate 10, and one end of the movable rod 13 is fixedly connected to a half gear 14 meshing with the first teeth 12, a first vertical rod 15 is fixedly connected to the bottom of the circular plate 11, the bottom of the first vertical rod 15 passes through the shell 3 and extends to the interior of the shell 3, a sealing plug 16 is fixedly connected to one side of the first vertical rod 15 extending to the interior of the shell 3, and a through hole 17 is opened inside the sealing plug 16, one end of the fixed rod 5 extending to the outside of the storage tank 2 and the other end of the movable rod 13 are fixedly connected to a pulley 18, and the surfaces of the two pulleys 18 are connected by a belt 19.

[0030] Specifically, the spheres are stored in the storage tank 2, and there is no need for manual single-time throwing of the spheres, which facilitates the flexible storage and throwing of the spheres, reduces the need for workers to repeatedly throw the spheres into the fracturing pipe 1, and increases the workload of the workers, and to a certain extent improves the throwing efficiency of the acid fracturing ball throwing guide device during use.

[0031] Specifically, a shell 3 is provided above the fracturing pipe 1, and a sealing plug 16 with a through hole 17 is provided inside the shell 3. The ball is dropped into the interior of the fracturing pipe 1 by utilizing the descending sealing plug 16. The ball dropping is reliable and the fracturing pump can be kept continuously for dropping the ball, thus avoiding the switching of the pressurized valve every time the ball is dropped, improving the safety of the ball dropping, reducing the labor intensity and operation time, and reducing the safety risk of the ball dropping operation.

[0032] Specifically, the push plate 6 inside the storage tank 2 continuously pushes the curved plate 8, which will discharge the spheres inside the storage tank 2 individually to the outside of the storage tank 2. At the same time, the sealing plug 16 can intermittently send the spheres to the inside of the fracturing pipe 1 by moving up and down.

[0033] Specifically, the motor 4 drives the fixed rod 5 to drive the pulley 18 to rotate, and through the transmission of the belt 19, the pulley 18 on the vertical plate 10 is driven to rotate, the movable rod 13 drives the half gear 14 to rotate, and the half gear 14 drives the return plate 11 to move downward, and the first vertical rod 15 pushes the sealing plug 16 to move downward, and the sealing plug 16 moves toward the inside of the fracturing pipe 1 until the through hole 17 enters the inside of the fracturing pipe 1.

[0034] Specifically, the half gear 14 is a gear with only half teeth. Its unique shape can intermittently mesh with the first teeth 12 on the inner wall of the circular plate 11, thereby driving the circular plate 11 to move up and down, and driving the sealing plug 16 inside the shell 3 to move up and down.

[0035] In the present invention, the top of the circular plate 11 is fixedly connected to the second vertical rod 20, and the top and bottom of the vertical plate 10 are fixedly connected to positioning rings 21, and the surfaces of the first vertical rod 15 and the second vertical rod 20 are slidably connected to a positioning ring 21 respectively.

[0036] Specifically, the positioning ring 21 is provided to limit the movement of the first vertical rod 15 and the second vertical rod 20 to prevent the return plate 11 from being offset when moving.

[0037] In the present invention, a through groove 22 is provided at the top of the surface of the fracturing pipe 1 and at a position corresponding to the outer shell 3 , and the diameter of the through hole 17 is consistent with the diameter of the inclined pipe 9 .

[0038] In the present invention, both sides of the top of the inner wall of the fracturing pipe 1 are fixedly connected with connecting blocks 23 , and a cross bar 24 is rotatably connected between the two connecting blocks 23 , and a spiral plate 25 is fixedly connected to the surface of the cross bar 24 .

[0039] In the present invention, a feed hopper 26 is fixedly connected to the top of the storage tank 2, and a spring 27 is fixedly connected between one side of the curved plate 8 and the bottom of the inner wall of the storage tank 2, and the number of the push plates 6 is three.

[0040] In the present invention, the bottom of the storage tank 2 is fixedly connected to a support seat 28 , and the bottom of the support seat 28 is fixedly connected to the top of the surface of the fracturing pipe 1 .

[0041] In the present invention, a gear 29 is fixedly connected to one end of the crossbar 24 , and grooves 30 are provided inside the sealing plug 16 and before and after the through hole 17 , and a second tooth 31 meshing with the gear 29 is fixedly connected to one side of the inner wall of the groove 30 .

[0042] Specifically, when the sealing plug 16 descends into the fracturing pipe 1, it can drive the spiral plate 25 inside the fracturing pipe 1 to rotate, thereby accelerating the flow rate of the fluid inside the fracturing pipe 1, so that the fluid inside the fracturing pipe 1 brings the ball at the internal through hole 17 of the sealing plug 16 into the formation.

[0043] In the present invention, the half gear 14 is located in the middle of the circular plate 11 , the number of the cross bars 24 is two, and the number of the spiral plates 25 on a single cross bar 24 is five.

[0044] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0045] When in use, the sphere is poured into the storage tank 2 through the feed hopper 26 in advance. When the sphere needs to be thrown, the motor 4 is started through the external switch, and the motor 4 drives the fixed rod 5 to rotate. The rotation of the fixed rod 5 drives the push plate 6 to rotate. The push plate 6 rotates to intermittently push the curved plate 8, and the curved plate 8 rotates on the U-shaped plate 7. When the curved plate 8 rotates, the sphere inside the storage tank 2 enters the inside of the housing 3 through the inclined tube 9. After the push plate 6 moves past the curved plate 8, the curved plate 8 returns to its original position under the elastic force of the spring 27, and the sphere in the inclined tube 9 enters the through hole 17 inside the sealing plug 16;

[0046] Driven by the motor 4, the fixed rod 5 drives the pulley 18 to rotate, and through the transmission of the belt 19, the pulley 18 on the vertical plate 10 is driven to rotate, and the movable rod 13 drives the half gear 14 to rotate, and the half gear 14 drives the return plate 11 to move downward, and the first vertical rod 15 pushes the sealing plug 16 to move downward, and the sealing plug 16 moves toward the inside of the fracturing pipe 1 until the through hole 17 enters the inside of the fracturing pipe 1. When the sealing plug 16 descends, the second tooth 31 of the internal groove 30 of the sealing plug 16 meshes with the gear 29 on the cross bar 24, driving the cross bar 24 to rotate, and the cross bar 24 drives the spiral plate 25 to rotate, so that the spiral plate 25 accelerates the flow of the fluid nearby, and the fluid inside the fracturing pipe 1 flushes the ball inside the through hole 17 out of the sealing plug 16. Under the continuous drive of the motor 4, the half gear 14 drives the return plate 11 to move upward, and brings the sealing plug 16 back to the inside of the shell 3, and repeats the ball throwing operation.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An acid fracturing ball-dropping guide device, comprising a fracturing pipe (1), a storage tank (2) and a housing (3), characterized in that: The back of the storage tank (2) is fixedly connected to a motor (4), and the output end of the motor (4) is fixedly connected to a fixing rod (5), the output end of the fixing rod (5) passes through the storage tank (2) and extends to the outside of the storage tank (2), the surface of the fixing rod (5) is fixedly connected to a pushing plate (6), and the bottom of the inner wall of the storage tank (2) is fixedly connected to a U-shaped plate (7), and a curved plate (8) is rotatably connected between the two sides of the inner wall of the U-shaped plate (7), and one side of the storage tank (2) is connected to one side of the outer shell (3) through an inclined tube (9); The top of the housing (3) is fixedly connected to a vertical plate (10), a return plate (11) is provided on the surface of the vertical plate (10), and first teeth (12) are fixedly connected to both sides of the inner wall of the return plate (11), a movable rod (13) is rotatably connected to the middle of the vertical plate (10), and one end of the movable rod (13) is fixedly connected to a half gear (14) meshing with the first teeth (12), the bottom of the return plate (11) is fixedly connected to a first vertical rod (15), and the first teeth (12) are fixedly connected to the bottom of the return plate (11). The bottom of a vertical rod (15) passes through the outer shell (3) and extends to the inside of the outer shell (3); a sealing plug (16) is fixedly connected to one side of the first vertical rod (15) extending to the inside of the outer shell (3); a through hole (17) is opened inside the sealing plug (16); one end of the fixed rod (5) extending to the outside of the storage tank (2) and the other end of the movable rod (13) are both fixedly connected to a pulley (18), and the surfaces of the two pulleys (18) are connected by a belt (19) for transmission.

2. The acid fracturing ball-dropping guide device according to claim 1, characterized in that: The top of the circular plate (11) is fixedly connected to a second vertical rod (20), and the top and bottom of the surface of the vertical plate (10) are fixedly connected to positioning rings (21), and the surfaces of the first vertical rod (15) and the second vertical rod (20) are respectively slidably connected to a positioning ring (21).

3. The acid fracturing ball-dropping guide device according to claim 1, characterized in that: A through groove (22) is provided at the top of the surface of the fracturing pipe (1) and at a position corresponding to the outer shell (3); the diameter of the through hole (17) is consistent with the diameter of the inclined pipe (9).

4. The acid fracturing ball-dropping guide device according to claim 1, characterized in that: Both sides of the top of the inner wall of the fracturing pipe (1) are fixedly connected with connection blocks (23), and a cross bar (24) is rotatably connected between the two connection blocks (23), and a spiral plate (25) is fixedly connected to the surface of the cross bar (24).

5. The acid fracturing ball-dropping guide device according to claim 1, characterized in that: A feed hopper (26) is fixedly connected to the top of the storage tank (2), and a spring (27) is fixedly connected between one side of the curved plate (8) and the bottom of the inner wall of the storage tank (2), and there are three push plates (6).

6. The acid fracturing ball-dropping guide device according to claim 1, characterized in that: The bottom of the storage tank (2) is fixedly connected to a support seat (28), and the bottom of the support seat (28) is fixedly connected to the top of the surface of the fracturing pipe (1).

7. The acid fracturing ball-dropping guide device according to claim 4, characterized in that: One end of the cross bar (24) is fixedly connected to a gear (29), and grooves (30) are provided inside the sealing plug (16) and located before and after the through hole (17), and one side of the inner wall of the groove (30) is fixedly connected to a second tooth (31) meshing with the gear (29).

8. The acid fracturing ball-dropping guide device according to claim 4, characterized in that: The half gear (14) is located in the middle of the return plate (11), the number of the cross bars (24) is two, and the number of the spiral plates (25) on a single cross bar (24) is five.

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