Ball throwing device for petroleum drilling

Abstract

The invention provides a ball throwing device for petroleum drilling, and belongs to the technical field of petroleum drilling. Comprising a main flow pipeline and a ball throwing pipeline, one side of the ball throwing pipeline is fixedly connected with an isolation channel, the side, away from the ball throwing pipeline, of the isolation channel is fixedly connected with a ball feeding pipeline, ball storage channels are symmetrically installed on the outer wall of the ball feeding pipeline, and the end, away from the isolation channel, of the ball feeding pipeline is fixedly connected with an air pressure balance pipeline. According to the ball throwing device, the ball feeding assembly is arranged, so that the air pressure in the ball throwing cavity and the air pressure in the main flow pipeline can be balanced, and it is guaranteed that steel balls and the internal structure of the ball throwing device are not damaged by high-pressure gas before ball throwing; the high-pressure gas is fully buffered and absorbed before entering the ball throwing device, and it is guaranteed that the gas cannot generate too large impact force locally, so that the internal structure of the ball throwing device is protected, and the safety of ball throwing operation is improved.

Description

Technical Field

[0001] This invention relates to the field of oil drilling technology, and in particular to a ball-dropping device for oil drilling. Background Technology

[0002] Ball-dropping devices for oil drilling are crucial tool systems in oil and gas drilling operations. Their core function is to remotely and selectively activate or operate downhole tools. The specific operation involves using the ball-dropping device to drop a steel ball from the ball-dropper chamber into the high-pressure main pipeline. However, due to the high pressure within the main pipeline, when the valve connecting the ball-dropper chamber and the main pipeline is opened, high-pressure gas rushes instantly from the main pipeline into the ball-dropper chamber. This extreme pressure can damage the internal structure of the ball-dropper chamber and even shatter the steel ball, affecting the normal ball-dropping progress. Furthermore, during the movement of the steel ball into the main pipeline, the high-pressure gas can cause it to move unevenly, potentially deviating from its path and causing it to collide with the pipeline wall, damaging its structure and affecting its subsequent usability. Therefore, to ensure the steel ball can enter the high-pressure main pipeline smoothly and safely during the ball-dropping operation, this invention provides a ball-dropping device for oil drilling to meet these requirements. Summary of the Invention

[0003] The technical problem this invention aims to solve is to provide a ball-dropping device for oil drilling. By setting up a ball-feeding assembly, the gas pressure inside the ball-dropping chamber can be balanced with the gas pressure in the main pipeline, ensuring that the steel ball and the internal structure of the ball-dropping device are not damaged by high-pressure gas before ball dropping. By setting up structures such as connecting valves, baffles, and diverting fan blades, the high-pressure gas is sufficiently buffered and absorbed before entering the ball-dropping device, ensuring that the gas does not generate excessive impact force locally, thereby protecting the internal structure of the ball-dropping device and improving the safety of ball dropping operations. Through the above settings, the problem of poor stability of steel balls and easy collision with the inner wall of the pipeline during the current ball-dropping device can be solved.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A ball-dropping device for oil drilling includes a main pipeline and a ball-dropping pipeline. The ball-dropping pipeline is fixedly connected to the main pipeline by screws. An isolation channel is fixedly connected to one side of the ball-dropping pipeline. A first hydraulic cylinder is fixedly connected to the top of the isolation channel. An isolation plate is fixedly connected to the output end of the first hydraulic cylinder. A ball-feeding pipeline is fixedly connected to the side of the isolation channel away from the ball-dropping pipeline. Ball storage channels are symmetrically installed on the outer wall of the ball-feeding pipeline. A sealing door is rotatably connected to one side of the ball storage channel. A steel ball is placed inside the ball storage channel. A pressure balancing pipeline is fixedly connected to the end of the ball-feeding pipeline away from the isolation channel. A pressure relief pipe is fixedly connected to the outer wall of the pressure balancing pipeline. A pressure relief valve is fixedly connected to the end of the pressure relief pipe away from the pressure balancing pipeline. A ball-feeding assembly is used to feed the steel ball into the ball-dropping pipeline. The ball-feeding assembly is connected to the ball-feeding pipeline, the ball storage channel, and the pressure balancing pipeline.

[0005] Optionally, the ball delivery assembly includes a mounting base fixedly connected to the outer wall of the ball delivery pipe. Two connecting valves are fixedly connected to the mounting base. A connecting pipe and a balancing air supply pipe are fixedly connected to both ends of the connecting valves, respectively. The connecting pipe is fixed to the ball delivery pipe, and the balancing air supply pipe is fixed to the air pressure balancing pipe.

[0006] Optionally, a second hydraulic cylinder is fixedly connected to the mounting base, an adjusting plate is fixedly connected to the output end of the second hydraulic cylinder, and connecting shafts are fixedly connected to both sides of the adjusting plate. The connecting shafts on both sides of the second hydraulic cylinder are fixed to the valve core inside the connecting valve.

[0007] Optionally, the ball delivery assembly further includes a third hydraulic cylinder fixedly connected to the end of the air pressure balance pipe. The output end of the third hydraulic cylinder is fixedly connected to a push rod, and the end of the push rod is fixedly connected to a push head with an arc-shaped profile. A baffle plate and a mounting plate are fixedly connected to the inner wall of the air pressure balance pipe. A vent hood is fixedly connected to the bottom of the mounting plate. A base is fixedly connected to the bottom of the vent hood. A rotating shaft is fixedly connected to the inner wall of the base. A flow divider fan blade is rotatably connected to the outer wall of the rotating shaft. The baffle plate is installed on the bottom outer side of the base.

[0008] Optionally, the baffle is an arc-shaped profile recessed towards the bottom of the mounting plate, and there are gaps between the two ends of the baffle and the air pressure balancing pipe.

[0009] Optionally, the mounting plate is fixedly connected to the inner wall of the air pressure balancing pipe by screws, and the installation position of the mounting plate corresponds to the position of the port of the balancing air supply pipe.

[0010] Optionally, the ball feeding assembly further includes a fourth hydraulic cylinder fixedly connected to the top of the ball storage channel. The output end of the fourth hydraulic cylinder is fixedly connected to a plurality of ball positioning plates. The plurality of ball positioning plates are fixedly connected together by a connecting plate, and the steel ball is clamped and fixed inside the ball positioning plate.

[0011] Optionally, an expansion plate is fixedly connected to one side of the ball-throwing positioning plate, and a limit plate is fixedly connected to the other side of the ball-throwing positioning plate. The outline of the ball-throwing positioning plate is adapted to the outline of the steel ball.

[0012] Optionally, both the expansion plate and the limiting plate have outwardly flipped arc-shaped contours, the outer circumference of the expansion plate is larger than the outer circumference of the limiting plate, and the limiting plate has a segmented structure.

[0013] Optionally, a ball retainer is fixedly connected to the inner wall of both the ball delivery pipe and the isolation channel, and the cross-sectional profile of the ball retainer is arc-shaped.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a ball delivery assembly, the air pressure inside the ball-throwing chamber can be balanced with the air pressure in the main pipeline before the ball is thrown. This ensures that the steel ball and the internal structure of the ball-throwing device are not damaged by high-pressure gas before the ball is thrown. During the air pressure balancing process, by setting up structures such as connecting valves, baffles, and diverting fan blades, the high-pressure gas is sufficiently buffered and absorbed before entering the ball-throwing device, ensuring that the gas does not generate excessive impact force locally. This protects the internal structure of the ball-throwing device and improves the safety of the ball-throwing operation.

[0015] By incorporating a ball positioning plate and a ball holder within the ball delivery assembly, this ball-throwing device can deliver several steel balls of different sizes at once. Throughout the throwing process, the steel balls are completely contained by the ball positioning plate and the ball holder, improving the stability of the steel balls during the throwing process and preventing misalignment or collisions, thus ensuring the integrity of the steel balls. In addition, this ball-throwing device is simple to operate and highly safe when loading new steel balls. Attached Figure Description

[0016] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0017] Figure 1 A first-person perspective three-dimensional structural diagram of a ball-dropping device for oil drilling. Figure 2 A two-dimensional structural diagram of a ball-dropping device for oil drilling; Figure 3 Enlarged 3D structural diagram of the pitching conduit, isolation channel, and ball delivery conduit; Figure 4 A cross-sectional three-dimensional structural diagram showing the pitching conduit, isolation channel, and ball delivery conduit. Figure 5 An enlarged 3D structural diagram showing the combination of the pitching conduit, isolation channel, ball storage channel, and air pressure balance conduit. Figure 6 Enlarged 3D structural diagram of the mounting base, second hydraulic cylinder, adjusting plate and connecting valve; Figure 7 A cross-sectional three-dimensional structural diagram showing the coordination between the ball delivery channel and the air pressure balance pipeline; Figure 8 A cross-sectional three-dimensional structural diagram showing the combination of a pressure balancing pipeline, a pressure balancing gas delivery pipe, and a baffle. Figure 9 This is an enlarged three-dimensional structural diagram of the baffle. Figure 10 Enlarged 3D structural diagram of the mounting plate, vent hood, base, and splitter fan blades; Figure 11 A cross-sectional three-dimensional structural diagram showing the mounting plate, vent hood, base, and splitter fan blades in conjunction; Figure 12 A cross-sectional three-dimensional structural diagram of the ball delivery assembly; Figure 13 An enlarged three-dimensional structural diagram of the third hydraulic cylinder, the ball-throwing positioning plate, and the steel ball; Figure 14 An enlarged 3D structural diagram of the pitching positioning plate; Figure 15 A first-person perspective three-dimensional structural diagram showing the pitching conduit, pitch storage channel, and pitching positioning plate in conjunction with the pitching positioning plate; Figure 16 A cross-sectional second-view three-dimensional structural diagram showing the pitching conduit, pitch storage channel, and pitching positioning plate.

[0018] Figure label: 1. Mainstream pipe; 2. Ball-throwing pipe; 3. Isolation channel; 4. Isolation plate; 5. First hydraulic cylinder; 6. Ball delivery pipe; 7. Ball holder; 8. Ball storage channel; 9. Sealing door; 10. Air pressure balance pipe; 11. Connecting pipe; 12. Mounting base; 13. Second hydraulic cylinder; 14. Adjusting plate; 15. Connecting valve; 16. Balance air supply pipe; 17. Pressure relief pipe; 18. Pressure relief valve; 19. Third hydraulic cylinder; 20. Push rod; 21. Push head; 22. Baffle plate; 23. Mounting plate; 24. Vent hood; 25. Base; 26. Diverter fan blade; 27. Rotating shaft; 28. Fourth hydraulic cylinder; 29. ​​Ball-throwing positioning plate; 30. Expansion plate; 31. Limiting plate; 32. Connecting plate; 33. Steel ball.

[0019] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0020] The present invention provides a ball-dropping device for oil drilling, which is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0021] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0022] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0023] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0024] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0025] like Figures 1 to 5 and Figure 7 As shown, an embodiment of the present invention provides a ball-throwing device for oil drilling, including a main pipe 1 and a ball-throwing pipe 2. The ball-throwing pipe 2 is fixedly connected to the main pipe 1 by screws. An isolation channel 3 is fixedly connected to one side of the ball-throwing pipe 2, and a first hydraulic cylinder 5 is fixedly connected to the top of the isolation channel 3. An isolation plate 4 is fixedly connected to the output end of the first hydraulic cylinder 5. In this technical solution, the ball-throwing pipe 2 is a "T"-shaped pipe body. The main pipe 1 is interrupted at the position of the ball-throwing pipe 2. The two ends of the ball-throwing pipe 2 are fixed to the main pipe 1 by flanges and screws to ensure ball-throwing... When pipe 2 is not in use, the throwing pipe 2 and the main pipe 1 remain closed. An isolation channel 3 is set at the connection point of the throwing pipe 2 and the main pipe 1. An isolation plate 4 driven by a first hydraulic cylinder 5 is set in the isolation channel 3. The isolation plate 4 can be raised and lowered under the driving action of the first hydraulic cylinder 5, thereby blocking and sealing the throwing pipe 2. This ensures that the throwing pipe 2 is isolated from the main pipe 1 when it is not in use, and that the internal air pressure of the throwing pipe 2 is not disturbed by the high pressure environment inside the main pipe 1, thereby improving the safety of the throwing system.

[0026] A ball delivery pipe 6 is fixedly connected to the side of the isolation channel 3 away from the ball delivery pipe 2. Ball holders 7 are fixedly connected to the inner walls of both the ball delivery pipe 6 and the isolation channel 3. The cross-sectional profile of the ball holders 7 is arc-shaped. Ball storage channels 8 are symmetrically installed on the outer wall of the ball delivery pipe 6. A sealing door 9 is rotatably connected to one side of the ball storage channel 8. A steel ball 33 is placed inside the ball storage channel 8. An air pressure balancing pipe 10 is fixedly connected to the end of the ball delivery pipe 6 away from the isolation channel 3. A pressure relief pipe 17 is fixedly connected to the outer wall of the air pressure balancing pipe 10. The pressure relief pipe 17 is located away from the air pressure balancing pipe 10. One end of the device is fixedly connected to a pressure relief valve 18. After the ball-throwing device is started, the steel ball 33 in the ball storage channel 8 will move along the ball delivery pipe 6 toward the ball-throwing pipe 2 and will eventually be transported into the main channel 1. Since ball retainers 7 are installed on the inner walls of the ball delivery pipe 6 and the isolation channel 3, the arc-shaped ball retainers 7 can support and limit the steel ball 33, preventing the steel ball 33 from being misaligned in the ball delivery pipe 6 and the isolation channel 3 during the movement. This ensures that the steel ball 33 can move smoothly in the ball-throwing device and avoids collisions.

[0027] Furthermore, the air pressure balancing pipe 10, the ball storage channel 8, and the ball delivery pipe 6 are all interconnected pipes, which together form the core pipeline of the ball-throwing device. In this technical solution, a pressure relief pipe 17 and a pressure relief valve 18 are installed at the end of the air pressure balancing pipe 10. The pressure relief valve 18 is an electrically controlled valve. When the operator closes the isolation plate 4 and opens the pressure relief valve 18, the air pressure inside the air pressure balancing pipe 10 will be balanced with the external air pressure. At this time, the operator can open the sealing door 9 to add steel balls 33 into the ball storage channel 8. The purpose of this setting is to ensure that when the operator performs the "ball-adding" operation on the ball-throwing device, the external air pressure is completely consistent with the air pressure inside the ball-throwing device, preventing equipment damage caused by the difference between the air pressure of the ball-throwing device and the external air pressure when the operator opens the sealing door 9, or air pressure ruptures the equipment and causes injury to the operator, thereby improving the safety of the ball-throwing device.

[0028] Optionally, a pressure sensor is installed inside the pipe of the ball-throwing device to facilitate the operator's observation of the internal pressure of the device and to facilitate depressurization. In this technical solution, the working principle and installation method of the pressure sensor are disclosed as prior art and will not be described in detail here.

[0029] As one implementation method in this embodiment, such as Figures 5 to 8As shown, the ball delivery assembly is used to deliver the steel ball 33 into the ball-throwing pipe 2. The ball delivery assembly is connected to the ball delivery pipe 6, the ball storage channel 8, and the air pressure balancing pipe 10. The ball delivery assembly includes a mounting base 12 fixedly connected to the outer wall of the ball delivery pipe 6. Two connecting valves 15 are fixedly connected to the mounting base 12. Connecting pipes 11 and balancing air supply pipes 16 are fixedly connected to the two ends of each connecting valve 15. The connecting pipe 11 is fixed to the ball-throwing pipe 2, and the balancing air supply pipe 16 is fixed to the air pressure balancing pipe 10. The mounting base 12 is fixedly connected to... The second hydraulic cylinder 13 has an adjusting plate 14 fixedly connected to its output end. Both sides of the adjusting plate 14 are fixedly connected to a connecting shaft. The connecting shafts on both sides of the second hydraulic cylinder 13 are fixed to the valve core inside the connecting valve 15. Before the ball-throwing device is operated, it is necessary to ensure that the air pressure inside the ball-throwing chamber is exactly the same as the air pressure inside the main flow pipe 1. In this technical solution, by setting a ball-feeding assembly, it can be ensured that when the air pressure inside the ball-throwing chamber is balanced with that inside the main flow pipe 1, the internal structure of the ball-throwing chamber will not be damaged by the instantaneous entry of high-pressure gas, thus improving the safety of the ball-throwing operation.

[0030] Specifically, both connecting valves 15 are mounted on the outer wall of the ball delivery pipe 6 via mounting bases 12. The valve cores inside both connecting valves 15 are fixed to the connecting shafts on both sides of the adjusting plate 14. This arrangement allows the adjusting plate 14 to synchronously control the opening and closing of the two connecting valves 15. The adjusting plate 14 is connected to the output end of the second hydraulic cylinder 13. When the second hydraulic cylinder 13 is started, it drives the adjusting plate 14 to rotate, thereby causing the adjusting plate 14 to synchronously drive the two connecting valves 15 to open and close. Connecting pipes 11 and balancing air supply pipes 16 are respectively installed at both ends of the connecting valves 15. Connecting pipe 11 is connected to the ball delivery pipe 2, and balancing air supply pipe 16 is connected to the air pressure balancing pipe 10. This arrangement allows... After the connecting valve 15 is opened, the air pressure balancing pipe 10 is connected to the air pressure inside the ball-throwing pipe 2. In order to ensure that the high pressure environment inside the ball-throwing pipe 2 does not cause a strong impact when it enters the air pressure balancing pipe 10, two sets of connecting pipe 11 and balancing air supply pipe 16 are provided. The balancing air supply pipe 16 is symmetrically arranged on the air pressure balancing pipe 10. When the high pressure gas enters the air pressure balancing pipe 10 along the balancing air supply pipe 16, it will enter from both sides of the air pressure balancing pipe 10 at the same time. The two high pressures rush into the air pressure balancing pipe 10. This arrangement ensures that the high pressure will not form a large impact force locally in the air pressure balancing pipe 10, thus protecting the safety of the internal structure of the ball-throwing chamber.

[0031] As one implementation method in this embodiment, such as Figures 7 to 12As shown, the ball delivery assembly also includes a third hydraulic cylinder 19 fixedly connected to the end of the air pressure balance pipe 10. A push rod 20 is fixedly connected to the output end of the third hydraulic cylinder 19, and a push head 21 is fixedly connected to the end of the push rod 20. The push head 21 has an arc-shaped profile. A baffle plate 22 and a mounting plate 23 are fixedly connected to the inner wall of the air pressure balance pipe 10. A vent hood 24 is fixedly connected to the bottom of the mounting plate 23, and a base 25 is fixedly connected to the bottom of the vent hood 24. A rotating shaft 27 is fixedly connected to the inner wall of the base 25, and a flow divider fan blade 26 is rotatably connected to the outer wall of the rotating shaft 27. The baffle plate 22 is mounted on... Mounted on the bottom outer side of the base 25, the baffle 22 has a concave arc-shaped profile facing the bottom of the mounting plate 23. There are gaps between the two ends of the baffle 22 and the air pressure balancing pipe 10. The mounting plate 23 is fixedly connected to the inner wall of the air pressure balancing pipe 10 by screws. The installation position of the mounting plate 23 corresponds to the position of the port of the balancing air supply pipe 16. As mentioned above, the balancing air supply pipe 16 is symmetrically arranged on the air pressure balancing pipe 10. The high-pressure air in the ball-throwing pipe 2 will enter the air pressure balancing pipe 10 along the balancing air supply pipe 16. Since the mounting plate 23 is installed on the balancing air supply pipe 16... At the interface between the pressure balancing pipe 10 and the mounting plate 23, the high-pressure gas discharged from the pressure balancing pipe 16 directly acts on the mounting plate 23. A rotatable diverter fan blade 26 is installed inside the mounting plate 23. The diverter fan blade 26 is limited by a rotating shaft 27. When the high-pressure gas enters the mounting plate 23, it first drives the diverter fan blade 26 to rotate. During the rotation of the diverter fan blade 26, it disperses and absorbs a portion of the high-pressure airflow. After passing through the diverter fan blade 26, the gas enters the ventilation hood 24 and is ejected from the gaps in the ventilation hood 24. The gas ejected from the ventilation hood 24 will... The gas acts directly on the baffle plate 22. Since the baffle plate 22 is located at the bottom of the vent hood 24 and the connecting pipe 11 is recessed towards the bottom of the mounting plate 23, the gas acting on the baffle plate 22 will collide with the baffle plate 22 and change direction during the collision. The gas on the baffle plate 22 will eventually flow out from both ends of the baffle plate 22 under the guidance of the arc-shaped contour of the baffle plate 22. At this time, the high-pressure gas no longer has destructive force under the dispersion and absorption effect of the diverting fan blade 26 and the isolation and deflection effect of the baffle plate 22, so it will not damage the structure inside the ball-throwing chamber.

[0032] As one implementation method in this embodiment, such as Figures 12 to 16As shown, the ball feeding assembly also includes a fourth hydraulic cylinder 28 fixedly connected to the top of the ball storage channel 8. Several ball-feeding positioning plates 29 are fixedly connected to the output end of the fourth hydraulic cylinder 28. These ball-feeding positioning plates 29 are fixedly connected together by connecting plates 32. A steel ball 33 is clamped and fixed within the ball-feeding positioning plate 29. An expansion plate 30 is fixedly connected to one side of the ball-feeding positioning plate 29, and a limiting plate 31 is fixedly connected to the other side. The outline of the ball-feeding positioning plate 29 matches the outline of the steel ball 33. Both the expansion plate 30 and the limiting plate 31 are outwardly rotating arc-shaped outlines. The outer circumference of the expansion plate 30 is larger than the outer circumference of the limiting plate 31. The size of the ball is such that the limiting plate 31 is a segmented structure. As mentioned above, the steel ball 33 is placed in the ball storage channel 8. Specifically, the steel ball 33 is limited and fixed in the ball storage channel 8 by the ball positioning plate 29. Several ball positioning plates 29 are fixed together by connecting plates 32. The top ball positioning plate 29 is fixed to the output end of the fourth hydraulic cylinder 28. Therefore, the mounting plate 23 can control the relative height of the ball positioning plate 29 in the ball storage channel 8. The size of the several ball positioning plates 29 decreases from top to bottom. This setting allows the ball throwing device to throw multiple steel balls 33 of different sizes at the same time, which meets the current ball throwing requirements.

[0033] Furthermore, an expansion plate 30 and a limiting plate 31 are respectively installed at both ends of the pitching positioning plate 29. The expansion plate 30 is close to the pusher head 21 and is larger than the pusher head 21. This arrangement allows the pusher head 21 to directly contact the steel ball 33. Under the driving action of the third hydraulic cylinder 19, the pusher head 21 can push the steel ball 33 towards the limiting plate 31, and under the thrust of the pusher head 21, push the steel ball 33 out of the pitching positioning plate 29, so that the steel ball 33 enters the ball delivery pipe 6. The positioning plate 29 is adapted to the contour of the steel ball 33, and the limiting plate 31 has a segmented structure. Therefore, the ball positioning plate 29 can limit the steel ball 33, and the limiting plate 31 can clamp and fix the steel ball 33, so that the steel ball 33 can be stably clamped and limited within the ball positioning plate 29. This setting ensures that the steel ball 33 can be stably limited within the ball storage channel 8 before being thrown, and will not be misaligned due to air pressure or other forces, thus improving the accuracy of the steel ball 33's throwing.

[0034] The working principle of the technical solution provided by this invention is as follows: When a throwing operation is required, the operator first closes the pressure relief valve 18 and then starts the second hydraulic cylinder 13. After the second hydraulic cylinder 13 starts, it drives the regulating plate 14 to simultaneously open the valve cores inside the two connecting valves 15. After the connecting valves 15 open, the high-pressure gas inside the throwing pipe 2 will enter the balance air supply pipe 16 through the connecting pipe 11, and finally be injected into the air pressure balance pipe 10 from the port of the balance air supply pipe 16. The high-pressure gas entering the air pressure balance pipe 10 will first drive the diverter fan blades 26 to rotate. After being dispersed and absorbed by the diverter fan blades 26, the gas impacts the baffle plate 22. During the collision between the gas and the baffle plate 22, the gas will be redirected. The gas on the baffle plate 22 will eventually flow out from both ends of the baffle plate 22 under the guidance of the arc-shaped contour of the baffle plate 22. At this time, the high-pressure gas no longer has destructive force under the dispersion and absorption effect of the diversion fan blade 26 and the isolation and redirection effect of the baffle plate 22. At this time, the gas pressure inside the ball-throwing device and the gas pressure inside the main pipeline 1 gradually tend to reach a state of equilibrium. The operator judges the specific pressure value by observing the air pressure sensor inside the ball-throwing device. When the pressure inside the ball-throwing device is consistent with that inside the main pipeline 1, the connecting valve 15 is closed.

[0035] Once the internal pressure of the throwing device is the same as that of the main pipe 1, the operator activates the first hydraulic cylinder 5, causing it to drive the isolation plate 4 upwards. After the isolation plate 4 opens, the ball delivery pipe 6 and the main pipe 1 are in a state of interconnection. Then, the operator activates the fourth hydraulic cylinder 28, causing it to push the throwing positioning plate 29 towards the ball delivery pipe 6. When the bottom throwing positioning plate 29 moves to be flush with the ball delivery pipe 6, the pushing of the throwing positioning plate 29 stops. At this time, the third hydraulic cylinder 19 is activated, causing it to drive the push rod 20 towards the throwing positioning plate 29. When the push head 21 touches the surface of the steel ball 33, the push head 21 continues to push the steel ball 33, thus pushing the steel ball 33 out of the throwing positioning plate 29 and allowing the steel ball 33 to be pushed out. 3. The ball 33 enters the ball delivery pipe 6. Once inside the ball delivery pipe 6, the ball 33 continues to move towards the main pipe 1 under the pushing action of the pusher 21. During the movement of the ball 33, the ball holder 7 will support and limit the movement of the ball 33 to prevent misalignment. After the first ball 33 has completely entered the main pipe 1, the ball 33 will fall into the depth of the main pipe 1 under its own gravity. At this time, the third hydraulic cylinder 19 is activated to drive the push rod 20 to reset. After the push rod 20 has completely reset, the fourth hydraulic cylinder 28 is activated again to push the ball positioning plate 29 downward. When the next ball positioning plate 29 is flush with the ball delivery pipe 6, the pushing of the ball positioning plate 29 is stopped. The above operation is repeated to throw the next ball 33 into the main pipe 1.

[0036] When it is necessary to add a new steel ball 33 to the ball storage channel 8, the first hydraulic cylinder 5 is activated to drive the isolation plate 4 to seal the ball delivery pipe 6. At this time, the ball delivery pipe 6 is isolated from the main pipe 1. Then, the second hydraulic cylinder 13 is activated to drive the regulating plate 14 to close the connecting valve 15. At this time, the ball throwing device is completely isolated from the main pipe 1. The operator opens the pressure relief valve 18 to balance the air pressure inside the ball throwing device with the external air pressure. The operator judges the pressure inside the ball throwing device by observing the air pressure sensor inside the ball throwing device. After the pressure is balanced, the pressure relief valve 18 is closed. The operator opens the sealing door 9 and fills the ball throwing positioning plate 29 with the steel ball 33. After filling, the sealing door 9 is closed again.

[0037] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A ball-dropping device for oil drilling, comprising a main pipe (1) and a ball-dropping pipe (2), characterized in that, The ball-throwing pipe (2) is fixedly connected to the main pipe (1) by screws. An isolation channel (3) is fixedly connected to one side of the ball-throwing pipe (2). A first hydraulic cylinder (5) is fixedly connected to the top of the isolation channel (3). An isolation plate (4) is fixedly connected to the output end of the first hydraulic cylinder (5). A ball-feeding pipe (6) is fixedly connected to the side of the isolation channel (3) away from the ball-throwing pipe (2). Ball storage channels (8) are symmetrically installed on the outer wall of the ball-feeding pipe (6). A sealing door (9) is rotatably connected to one side of the ball storage channel (8). A steel ball (33) is placed inside the ball storage channel (8). A pressure balance pipe (10) is fixedly connected to the end of the ball-feeding pipe (6) away from the isolation channel (3). A pressure relief pipe (17) is fixedly connected to the outer wall of the pressure balance pipe (10). A pressure relief valve (18) is fixedly connected to the end of the pressure relief pipe (17) away from the pressure balance pipe (10). The ball delivery assembly is used to deliver the steel ball (33) into the ball delivery pipe (2). The ball delivery assembly is connected to the ball delivery pipe (6), the ball storage channel (8) and the air pressure balance pipe (10) respectively.

2. The ball-dropping device for oil drilling according to claim 1, characterized in that, The ball delivery assembly includes a mounting base (12) fixedly connected to the outer wall of the ball delivery pipe (6). Two connecting valves (15) are fixedly connected to the mounting base (12). A connecting pipe (11) and a balancing air supply pipe (16) are fixedly connected to both ends of the connecting valves (15). The connecting pipe (11) is fixed to the ball delivery pipe (2), and the balancing air supply pipe (16) is fixed to the air pressure balancing pipe (10).

3. The ball-dropping device for oil drilling according to claim 2, characterized in that, A second hydraulic cylinder (13) is fixedly connected to the mounting base (12). An adjusting plate (14) is fixedly connected to the output end of the second hydraulic cylinder (13). A connecting shaft is fixedly connected to both sides of the adjusting plate (14). The connecting shafts on both sides of the second hydraulic cylinder (13) are fixed to the valve core inside the connecting valve (15).

4. The ball-dropping device for oil drilling according to claim 2, characterized in that, The ball delivery assembly also includes a third hydraulic cylinder (19) fixedly connected to the end of the air pressure balance pipe (10). The output end of the third hydraulic cylinder (19) is fixedly connected to a push rod (20). The end of the push rod (20) is fixedly connected to a push head (21). The push head (21) has an arc-shaped profile. A baffle plate (22) and a mounting plate (23) are fixedly connected to the inner wall of the air pressure balance pipe (10). A vent hood (24) is fixedly connected to the bottom of the mounting plate (23). A base (25) is fixedly connected to the bottom of the vent hood (24). A rotating shaft (27) is fixedly connected to the inner wall of the base (25). A diverter fan blade (26) is rotatably connected to the outer wall of the rotating shaft (27). The baffle plate (22) is installed on the bottom outer side of the base (25).

5. The ball-dropping device for oil drilling according to claim 4, characterized in that, The baffle (22) has an arc-shaped profile that is recessed toward the bottom of the mounting plate (23), and there are gaps between the two ends of the baffle (22) and the air pressure balance pipe (10).

6. The ball-dropping device for oil drilling according to claim 4, characterized in that, The mounting plate (23) is fixedly connected to the inner wall of the air pressure balance pipe (10) by screws, and the installation position of the mounting plate (23) corresponds to the position of the port of the balance air supply pipe (16).

7. The ball-dropping device for oil drilling according to claim 1, characterized in that, The ball delivery assembly also includes a fourth hydraulic cylinder (28) fixedly connected to the top of the ball storage channel (8). The output end of the fourth hydraulic cylinder (28) is fixedly connected to several ball positioning plates (29). The several ball positioning plates (29) are fixedly connected together by a connecting plate (32). The steel ball (33) is clamped and fixed inside the ball positioning plate (29).

8. The ball-dropping device for oil drilling according to claim 7, characterized in that, An expansion plate (30) is fixedly connected to one side of the ball positioning plate (29), and a limit plate (31) is fixedly connected to the other side of the ball positioning plate (29). The outline of the ball positioning plate (29) is adapted to the outline of the steel ball (33).

9. The ball-dropping device for oil drilling according to claim 8, characterized in that, Both the expansion plate (30) and the limiting plate (31) are outwardly flipped arc-shaped contours. The outer circumference of the expansion plate (30) is larger than that of the outer circumference of the limiting plate (31). The limiting plate (31) is a segmented structure.

10. The ball-dropping device for oil drilling according to claim 1, characterized in that, Both the ball delivery pipe (6) and the isolation channel (3) are fixedly connected to a ball retainer (7), and the cross-sectional profile of the ball retainer (7) is arc-shaped.

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