Acid fracturing device

Abstract

The utility model provides an acidizing fracturing device, which relates to the technical field of oil field exploration and comprises an inclined ball storage pipeline, a temporary blocking ball is slidably connected in the inclined ball storage pipeline, a first through hole and a second through hole are formed in the outer wall of the inclined ball storage pipeline, a motor supporting box is fixedly connected to one side of the inclined ball storage pipeline, and a motor is fixedly connected to the other side of the inclined ball storage pipeline. Guide rails are fixedly connected to the top and the bottom of the motor supporting box, a servo motor is fixedly connected to the inner wall of the motor supporting box, a half gear is fixedly connected to the output end of the servo motor, a shell is arranged on one side of the servo motor, and a first rack and a second rack are fixedly connected to the inner wall of the shell; the half gear is connected with the first rack and the second rack in an engaged mode. A plurality of temporary plugging balls are prevented from sliding into a main pipeline, the process is simple, and daily maintenance and overhaul are facilitated; according to the utility model, when the speed of the ball is too high, the motion state possibly becomes unstable, so that shaking is generated, and the damage to the inner wall of the main pipeline and the branch perforation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field exploration, in particular to an acid fracturing device. Background Art

[0002] Acid fracturing device is a key equipment used in oil and gas field development. Its working principle is based on the high pressure application of liquid and the influence of chemical substances on the formation. In the fracturing operation, the acid fracturing device expands the cracks through high pressure liquid (usually water), thereby improving the permeability of underground rocks and promoting the flow of crude oil from the reservoir. In the acidizing operation, the formation is treated with acid to dissolve some minerals that are not easy to flow, further improving the permeability of the formation, making it easier for crude oil to flow to the wellhead. The combination of these two operation methods can significantly increase the production capacity of oil wells. Acid fracturing devices are mainly used in unconventional oil and gas development fields, such as shale gas, tight oil and water-containing gasoline.

[0003] After searching, the utility model with the announcement number CN212508244U discloses an acid fracturing device. Although the utility model patent solves the problem in the prior art that the gravity is not enough, the balls are blocked in the pipeline and cannot play the role of throwing balls. At the same time, the traditional addition of balls can only be added into the ball feeder by the staff one by one, which is troublesome to operate and wastes a lot of labor;

[0004] First, the utility model patent uses a push rod to speed up the ball so that the ball enters the main pipe. When the ball speed is too high, the motion state may become unstable, resulting in shaking, which may cause damage to the inner wall of the main pipe;

[0005] Second, the utility model patent achieves the purpose of pushing the ball into the main pipe to plug the hole through the cooperation of components such as the ball feeder, motor, transmission shaft, supercharger, push rod, protective pad and first spring. The process is cumbersome and troublesome, which is not conducive to daily maintenance and repair;

[0006] To this end, an acid fracturing device is proposed. Utility Model Content

[0007] In view of this, the utility model provides an acid fracturing device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0008] The technical solution of the utility model is achieved as follows: an acid fracturing device comprises an oblique ball storage pipeline, a temporary plugging ball is slidably connected in the oblique ball storage pipeline, a through hole 1 and a through hole 2 are opened on the outer wall of the oblique ball storage pipeline, a motor support box is fixedly connected to one side of the oblique ball storage pipeline, a guide rail is fixedly connected to the top and bottom of the motor support box, a servo motor is fixedly connected to the inner wall of the motor support box, a half gear is fixedly connected to the output end of the servo motor, a shell is provided on one side of the servo motor, a rack 1 and a rack 2 are fixedly connected to the inner wall of the shell, and the half gear is meshed with the rack 1 and the rack 2 respectively, a C-shaped support frame is fixedly connected to the side of the shell away from the servo motor, the C-shaped support frame is slidably connected to the guide rail and the inside of the motor support box, one end of the C-shaped support frame is fixedly connected to a limited baffle 1, the limited baffle 1 slides in the through hole 1, one end of the C-shaped support frame is fixedly connected to a limited baffle 2, the limited baffle 2 slides in the through hole 2, and one end of the oblique ball storage pipeline is connected to a main pipeline.

[0009] Further preferably, a hinged seat is fixedly connected to the inner wall of the main pipe, a speed limiting baffle is hinged inside the hinged seat, a damper is arranged below the speed limiting baffle, one end of the damper is fixedly connected to the inner wall of the main pipe, a spring is sleeved on the outside of the damper, and the spring is against the bottom surface of the speed limiting baffle.

[0010] Further preferably, a protective gasket 1 is fixedly connected to the inner wall of the main pipe away from the oblique ball storage pipe, and the protective gasket 1 is used to protect the inner wall of the main pipe to prevent the temporary blocking balls from causing wear to the inner wall of the main pipe.

[0011] Further preferably, a second protective gasket is fixedly connected to the surface of the speed limit baffle. The damper is used to protect the temporary blocking ball and the speed limit baffle to prevent the temporary blocking ball and the speed limit baffle from surface wear, which may easily cause loose blocking of the hole.

[0012] Further preferably, a triangular push block is fixedly connected to one side of the limiting baffle close to the main pipeline, and the triangular push block pushes the temporary blocking ball.

[0013] Further preferably, the articulated seat, speed limiting baffle and damper are provided in two groups, and the two groups of the articulated seat, speed limiting baffle and damper are located on both sides of the temporary plugging ball in the main pipe. The two groups of the articulated seat, speed limiting baffle and damper have a better buffering effect on the temporary plugging ball, preventing the temporary plugging ball from having an excessively high speed, causing a large impact on the acid fracturing pipe at the moment of plugging the hole, and causing damage to the acid fracturing pipe.

[0014] Further preferably, the two groups of speed limiting baffles are inclined downwardly away from one end of the main pipeline.

[0015] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0016] 1. When the utility model needs to put a temporary blocking ball into the main pipeline, the servo motor is started, the servo motor drives the half gear to rotate, the rotation of the half gear drives the C-shaped support frame to move upward, then the limit baffle plate 1 and the limit baffle plate 2 move upward, the limit baffle plate 1 moves upward so that the balls in the oblique ball storage pipeline move toward the main pipeline, the limit baffle plate 2 moves upward to prevent multiple temporary blocking balls from sliding into the main pipeline, so that there is a temporary blocking ball between the limit baffle plate 1 and the limit baffle plate 2, when the half gear rotates to drive the C-shaped support frame to move downward, the limit baffle plate 1 and the limit baffle plate 2 move downward, the limit baffle plate 1 moves downward so that the temporary blocking balls on both sides of the limit baffle plate 1 in the oblique ball storage pipeline are separated, the limit baffle plate 2 moves downward so that a temporary blocking ball on one side of the triangular push block is pushed into the main pipeline, preventing multiple temporary blocking balls from sliding into the main pipeline, the process has fewer components, the process is simple, and it is conducive to daily maintenance and overhaul;

[0017] 2. The temporary blocking ball in the main pipeline of the utility model is buffered by the protective gasket 1 to prevent damage to the inner wall of the main pipeline. The temporary blocking ball in the main pipeline presses the speed limit baffle downward, and the buffering speed of the temporary blocking ball is reduced by the spring to prevent the movement state from becoming unstable when the ball speed is too high, thereby preventing shaking and causing damage to the inner wall of the main pipeline and the sub-perforations.

[0018] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 It is a partial structural schematic diagram of the utility model;

[0022] Figure 3 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 4 It is a partial cross-sectional structural schematic diagram of the utility model.

[0024] Figure numerals: 1. oblique ball storage pipe; 2. through hole one; 3. through hole two; 4. motor support box; 5. servo motor; 6. half gear; 7. housing; 8. rack one; 9. rack two; 10. C-shaped support frame; 11. limit baffle one; 12. limit baffle two; 13. triangular push block; 14. temporary blocking ball; 15. guide rail; 16. main pipeline; 17. protective gasket one; 18. hinged seat; 19. speed limit baffle; 20. damper; 21. spring; 22. protective gasket two. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0026] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-4 As shown, the embodiment of the utility model provides an acid fracturing device: comprising an inclined ball storage pipeline 1, a temporary plugging ball 14 is slidably connected in the inclined ball storage pipeline 1, a through hole 1 2 and a through hole 2 3 are opened on the outer wall of the inclined ball storage pipeline 1, a motor support box 4 is fixedly connected to one side of the inclined ball storage pipeline 1, a guide rail 15 is fixedly connected to the top and bottom of the motor support box 4, a servo motor 5 is fixedly connected to the inner wall of the motor support box 4, a half gear 6 is fixedly connected to the output end of the servo motor 5, a shell 7 is provided on one side of the servo motor 5, and a Rack 1 8 and rack 2 9, the half gear 6 is meshed with rack 1 8 and rack 2 9 respectively, a C-shaped support frame 10 is fixedly connected to the side of the shell 7 away from the servo motor 5, the C-shaped support frame 10 is slidably connected to the guide rail 15 and the inside of the motor support box 4, one end of the C-shaped support frame 10 is fixedly connected to a limited baffle 1 11, the limited baffle 1 11 slides in the through hole 1 2, one end of the C-shaped support frame (10) is fixedly connected to a limited baffle 2 12, the limited baffle 2 12 slides in the through hole 2 3, and one end of the oblique ball storage pipeline 1 is connected to the main pipeline 16.

[0028] In one embodiment, the inner wall of the main pipe 16 is fixedly connected with an articulated seat 18, and a speed limit baffle 19 is hinged inside the articulated seat 18. A damper 20 is arranged below the speed limit baffle 19. One end of the damper 20 is fixedly connected with the inner wall of the main pipe 16, and a spring 21 is sleeved on the outside of the damper 20. The spring 21 abuts against the bottom surface of the speed limit baffle 19. A protective gasket 17 is fixedly connected to the inner wall of the main pipe 16 away from the oblique ball storage pipe 1. The protective gasket 17 is used to protect the inner wall of the main pipe 16 and prevent the temporary blocking ball 14 from causing wear on the inner wall of the main pipe 16.

[0029] In one embodiment, a protective gasket 22 is fixedly connected to the surface of the speed limit baffle 19. The damper 20 is used to protect the temporary blocking ball 14 and the speed limit baffle 19 to prevent the temporary blocking ball 14 and the speed limit baffle 19 from wearing. The wear of the temporary blocking ball 14 easily causes the plugging hole to be loose. The side of the limit baffle 11 close to the main pipeline 16 is fixedly connected with a triangular push block 13, and the triangular push block 13 pushes the temporary blocking ball 14. There are two sets of articulated seats 18, speed limit baffles 19 and dampers 20, and the two sets of articulated seats 18, speed limit baffles 19 and dampers 20 are located on both sides of the temporary blocking ball 14 in the main pipeline 16. The two sets of articulated seats 18, speed limit baffles 19 and dampers 20 have a better buffering effect on the temporary blocking ball 14, preventing the temporary blocking ball 14 from having too high a speed, causing a greater impact on the acid fracturing pipe at the moment of plugging the hole, and causing damage to the acid fracturing pipe. The two sets of speed limit baffles 19 are tilted downward away from the end of the main pipeline 16.

[0030] When the utility model is working, a plurality of temporary blocking balls 14 are pre-placed in the oblique ball storage pipeline 1. Under the action of gravity, the temporary blocking balls 14 in the oblique ball storage pipeline 1 move toward the direction close to the limiting baffle 11, and the temporary blocking balls 14 are close to the limiting baffle 11. When it is necessary to put the temporary blocking balls 14 into the main pipeline 16, the staff starts the servo motor 5, and the servo motor 5 drives the half gear 6 to rotate. When the half gear 6 rotates to mesh with the rack 2 9, the rack 2 9 rotates with the rotation of the half gear 6. When moving upward, the housing 7 moves upward, thereby driving the C-shaped support frame 10 to move upward, and the limit baffle 1 11 and the limit baffle 2 12 move upward. The limit baffle 1 11 moves upward to make the balls in the oblique ball storage pipe 1 move toward the main pipe 16, and the limit baffle 2 12 moves upward to prevent multiple temporary blocking balls 14 from sliding into the main pipe 16. At this time, there is a temporary blocking ball 14 between the limit baffle 1 11 and the limit baffle 2 12. When the half gear 6 rotates to mesh with the rack 1 8, the gear When the bar 18 moves downward with the rotation of the half gear 6, the shell 7 moves downward, thereby driving the C-shaped support frame 10 to move downward, and the limit baffle 1 11 and the limit baffle 2 12 move downward. The limit baffle 1 11 moves downward so that the temporary blocking balls 14 on both sides of the limit baffle 1 1 in the oblique ball storage pipe 1 are separated, and the limit baffle 2 12 moves downward so that a temporary blocking ball 14 on one side of the triangular push block 13 is pushed into the main pipe 16 to prevent multiple temporary blocking balls 14 from sliding into the main pipe 16. The process has fewer components, a simple process, and is conducive to daily maintenance and overhaul; the temporary blocking ball 14 in the main pipe 16 is buffered by the protective gasket 17 to prevent damage to the inner wall of the main pipe 16. The temporary blocking ball 14 in the main pipe 16 presses the speed limit baffle 19 downward, and the temporary blocking ball 14 is reduced by the buffering speed of the spring 21 to prevent the movement state from becoming unstable when the ball speed is too large, thereby causing shaking and damaging the inner wall of the main pipe 16 and the sub-perforations.

[0031] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An acid fracturing device, characterized in that: The invention comprises an oblique ball storage pipe (1), wherein a temporary blocking ball (14) is slidably connected inside the oblique ball storage pipe (1), a through hole 1 (2) and a through hole 2 (3) are opened on the outer wall of the oblique ball storage pipe (1), a motor support box (4) is fixedly connected to one side of the oblique ball storage pipe (1), a guide rail (15) is fixedly connected to the top and bottom of the motor support box (4), a servo motor (5) is fixedly connected to the inner wall of the motor support box (4), a half gear (6) is fixedly connected to the output end of the servo motor (5), a housing (7) is provided on one side of the servo motor (5), a rack 1 (8) and a rack 2 (9) are fixedly connected to the inner wall of the housing (7), and the The half gear (6) is meshed with rack one (8) and rack two (9) respectively; a C-shaped support frame (10) is fixedly connected to the side of the housing (7) away from the servo motor (5); the C-shaped support frame (10) is slidably connected to the guide rail (15) and the inside of the motor support box (4); one end of the C-shaped support frame (10) is fixedly connected to a limited baffle plate one (11); the limited baffle plate one (11) slides in a through hole one (2); one end of the C-shaped support frame (10) is fixedly connected to a limited baffle plate two (12); the limited baffle plate two (12) slides in a through hole two (3); one end of the oblique ball storage pipe (1) is connected to a main pipe (16).

2. The acid fracturing device according to claim 1, characterized in that: The inner wall of the main pipe (16) is fixedly connected with a hinge seat (18), a speed limit baffle (19) is hingedly connected inside the hinge seat (18), a damper (20) is arranged below the speed limit baffle (19), one end of the damper (20) is fixedly connected to the inner wall of the main pipe (16), a spring (21) is sleeved on the outside of the damper (20), and the spring (21) is against the bottom surface of the speed limit baffle (19).

3. The acid fracturing device according to claim 1, characterized in that: A protective gasket (17) is fixedly connected to the inner wall of the main pipeline (16) on one side away from the oblique ball storage pipeline (1).

4. The acid fracturing device according to claim 2, characterized in that: A second protective gasket (22) is fixedly connected to the surface of the speed limit baffle (19).

5. The acid fracturing device according to claim 1, characterized in that: A triangular push block (13) is fixedly connected to one side of the limiting baffle plate 1 (11) close to the main pipeline (16), and the triangular push block (13) pushes the temporary blocking ball (14).

6. The acid fracturing device according to claim 2, characterized in that: The hinged seat (18), the speed limiting baffle (19) and the damper (20) are provided in two groups, and the two groups of the hinged seat (18), the speed limiting baffle (19) and the damper (20) are located on both sides of the temporary blocking ball (14) in the main pipeline (16).

7. The acid fracturing device according to claim 2, characterized in that: The two groups of speed limiting baffles (19) are inclined downward at one end away from the main pipeline (16).

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