Pressurizing safety equipment for oil exploitation

Abstract

The invention relates to the technical field of oil exploitation equipment, and discloses oil exploitation pressurization safety equipment which comprises a pressurization assembly, a driving assembly and a cleaning assembly, the pressurization assembly comprises two pressurization cylinder sleeves and a piston, a pressurization cavity is formed in the middle of the pressurization cylinder sleeves, and the pressurization cavity is of an open structure; the piston is installed between the pressurizing cavities of the two pressurizing cylinder sleeves in a sealed and sliding mode, when the piston conducts sliding pressurizing in one pressurizing cavity, negative pressure is synchronously formed in the other pressurizing cavity to suck a pressurizing medium, the driving assembly is connected with the piston, the driving assembly comprises a first lead screw, and the first lead screw is rotationally installed between the two pressurizing cavities. The first lead screw can drive the piston to slide, the cleaning assembly is connected with the piston, and the cleaning assembly can synchronously clean the inner wall of the pressurizing cylinder sleeve when the piston slides. According to the invention, the rotating speed can be effectively reduced, and the effects of reducing noise, vibration and abrasion are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil production equipment, and more specifically to oil production pressurization safety equipment. Background Art

[0002] During the oil extraction process, high-pressure air or water is generally injected into the rock formation through pressurized equipment to ensure that the rock formation can produce more cracks or maintain underground pressure, so that the oil and natural gas in the rock formation can quickly flow from the cracks into the drilled mine, ultimately improving the extraction efficiency.

[0003] In the prior art, the Chinese patent publication number CN114352245B discloses the related technology of pressurized equipment for oil extraction, which mainly includes a machine body, the machine body is provided with a pressurized channel, the pressurized channel includes a first pressurized pipe and a second pressurized pipe; the machine body is provided with a linkage lifting mechanism and a driver, the linkage lifting mechanism includes a first rotating rod driven by the driver to rotate and rotatably connected to the machine body, a cam connected to the first rotating rod, a frame driven to lift and lower by the cam, a return spring connected between the frame and the machine body, and an intermittent pressurization system connected to the frame and used for intermittently pressurizing the first pressurized pipe and the second pressurized pipe; the machine body is provided with a guide groove, the frame is slidably connected in the guide groove along the vertical direction, the return spring is arranged in the guide groove, one end of the return spring is connected to the bottom wall of the guide groove and the other end is connected to the frame, and the application has the effect of improving the stability of the operation of the mechanism during the pressurization process.

[0004] The above-mentioned existing technology mainly relies on the mutual linkage and coordination of multiple groups of pressurizing structures to achieve more stable pressurizing work. However, its linkage structure is mainly connected to the same crankshaft and transmits power. Under this structure, the main shaft of the crankshaft will need to bear a huge reaction torque, which places extremely high requirements on the mechanical properties of the crankshaft (requiring excellent materials or a large crankshaft diameter). Therefore, in order to reduce the instantaneous torque, the crankshaft on the crankshaft needs to have a smaller size to reduce the lever arm, which will result in a shorter piston movement stroke. Therefore, the crankshaft needs to rotate at a high speed to ensure sufficient pressure output at the rear end, and high-speed rotation will bring greater noise, vibration and wear. Overall, the structure still has a lot of room for optimization. Summary of the invention

[0005] In order to overcome the above defects of the prior art, the present invention provides an oil production pressurization safety device to solve the problem in the above background technology that the existing oil production pressurization safety device is prone to noise, vibration and fixture wear during use due to the need for high-speed rotation.

[0006] The present invention provides the following technical solutions: a kind of oil extraction pressurized safety equipment, including a pressurizing component, a driving component and a cleaning component, the pressurizing component including two pressurized cylinder sleeves and a piston, a pressurizing chamber is provided in the middle of the pressurized cylinder sleeve, and the pressurizing chamber is an open structure, the piston is slidingly installed between the pressurized chambers of the two pressurized cylinder sleeves, and when the piston slides and pressurizes in one pressurized chamber, it will synchronously form a negative pressure in the other pressurized chamber to absorb the pressurized medium, the driving component is connected to the piston, the driving component includes a first screw rod, the first screw rod is rotatably installed in the middle of the two pressurized chambers, and the first screw rod can drive the piston to slide, the cleaning component is connected to the piston, and the cleaning component can synchronously clean the inner wall of the pressurized cylinder sleeve when the piston slides.

[0007] Furthermore, the pressurizing component also includes a connecting seat, a connecting port is provided in the middle of the connecting seat, the openings of the two pressurizing chambers are respectively connected to the connecting ports, and the piston can slide in the connecting port. A wedge-shaped socket is provided on the edge of the connecting port, and a wedge-shaped insert is fixedly installed on the opening edge of the pressurizing chamber, and the insert can be tightly inserted into the socket.

[0008] Furthermore, the pressurizing assembly also includes a locking screw and a nut. The surfaces of the pressurizing cylinder sleeve and the connecting seat are both provided with mounting holes. When the pressurizing chamber is aligned with the connecting port, the locking screw can be simultaneously inserted into the mounting holes on the surfaces of the pressurizing cylinder sleeve and the connecting seat. The nut is threadedly installed at both ends of the locking screw. After the nut is tightened, the pressurizing cylinder sleeve and the connecting seat remain fixed.

[0009] Furthermore, the pressurizing component also includes an inlet and outlet pipe and a transfer pipe. The inlet and outlet pipes are installed on the surface of the pressurizing cylinder sleeve, and the inlet and outlet pipes are connected to the pressurizing chamber. The two ends of the transfer pipe can be connected to the external pressurized medium and the underground oil reservoir respectively. The end of the inlet and outlet pipe away from the pressurized cylinder sleeve is connected to the middle of the transfer pipe. Two sets of one-way valves are installed on the transfer pipe, and the two sets of one-way valves are respectively located at the two ends of the connection between the inlet and outlet pipes and the transfer pipe. At the same time, under the action of the two sets of one-way valves, the external pressurized medium entering the transfer pipe can only flow from the transfer pipe to the underground oil reservoir.

[0010] Furthermore, the driving assembly includes a guide rod, a motor and a transmission assembly. The guide rod is fixedly installed in the two pressurized chambers, the piston seal is slidably installed on the surface of the guide rod, the bottom surface of the pressurized cylinder sleeve is installed with a base plate, the motor is fixedly installed on the base plate, and the transmission assembly is installed between the motor and the first screw rod. The motor can drive the first screw rod to reciprocate through the transmission assembly. The surface of the first screw rod is provided with a foldable first protective cover, and the first protective cover is connected between the piston and the inner wall of the pressurized chamber.

[0011] Furthermore, the transmission assembly includes a turntable, a connecting rod, a first gear, a rack and a gearbox. The turntable is fixedly mounted on the output shaft of the motor, a guide rail is fixedly mounted on the surface of the base plate, the rack is slidably mounted on the guide rail, one end of the connecting rod is eccentrically connected to the surface of the turntable for rotation, and the other end is connected to the surface of the rack for rotation, the first gear is coaxially connected to the output end of the gearbox, and the first gear is meshed with the rack, and the output end of the gearbox is coaxially connected to the first screw rod.

[0012] Furthermore, the cleaning assembly includes a cleaning block, which is installed on the side of the piston and is in close contact with the inner wall of the pressurized chamber. The cleaning block is equipped with a power assembly, and the cleaning block can rotate around the inner wall of the pressurized chamber under the action of the power assembly.

[0013] Furthermore, the power assembly includes a second screw, a second gear and a ring gear. The second screw is fixedly installed in the two pressurized chambers. The piston is slidably sleeved on the surface of the second screw. The second gear is rotatably installed on the side of the piston. At the same time, the second gear and the second screw are threadedly connected without self-locking properties. The ring gear is rotatably installed on the side of the piston, and the ring gear is meshed with the second gear. The cleaning block is fixedly installed on the side of the ring gear. The surface of the second screw is sleeved with a foldable second protective cover, and the second protective cover is connected between the second gear and the inner wall of the pressurized chamber.

[0014] Furthermore, the cleaning block includes an outer shell, a contact block and a compression spring. The outer shell is fixedly connected to the gear ring. The surface of the outer shell close to the inner wall of the pressurized chamber is an open structure. The contact block is slidably installed in the outer shell. The compression spring is connected between the contact block and the inner wall of the outer shell. Under the action of the compression spring, the contact block remains in close contact with the inner wall of the pressurized chamber.

[0015] Technical effects and advantages of the present invention:

[0016] 1. In the present invention, during use, the first screw in the driving assembly is used to drive the piston to slide, thereby achieving the effect of multiple groups of pressurization. Under this structure, the reaction force fed back by the piston is parallel to the axis of the first screw, that is, the main force-bearing component (the first screw) bears the axial force. In this way, under the same size, it will be able to withstand a larger load, and the axial length of the first screw is sufficient, thereby effectively ensuring that the piston stroke is sufficient. Therefore, the rotation speed can be effectively reduced, thereby reducing noise, vibration and wear.

[0017] 2. In the present invention, during use, the sliding of the piston will also synchronously drive the cleaning component to clean the inner wall of the pressurized chamber, which will effectively reduce the entry of tiny particles in the pressurized medium through the gap between the piston and the pressurized chamber, thereby protecting the seal between the piston and the pressurized chamber.

[0018] 3. In the present invention, under the action of the cleaning component, when the equipment stops operating and causes the liquid pressurized medium in the pressurized chamber to precipitate, the continuously rotating cleaning block in the cleaning component can form stirring in the pressurized chamber, thereby ensuring that the pressurized medium is uniform and stable, and can also prevent the large amount of sediment generated at the bottom of the pressurized chamber from causing greater damping to the sliding of the piston, thereby further enhancing the protection of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0020] Figure 2 A schematic diagram of the second viewing angle of the three-dimensional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the pressurized chamber of the present invention from a first viewing angle;

[0022] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0023] Figure 5 This is a schematic diagram of the internal structure of the pressurized chamber of the present invention from a second viewing angle;

[0024] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0025] Figure 7 This is a schematic structural diagram of the internal structure of the pressurized chamber of the present invention from a third viewing angle;

[0026] Figure 8 For the present invention Figure 7 The enlarged structural diagram at C in the middle;

[0027] Fig. 9 Schematic diagram of the internal structure of the cleaning block of the present invention.

[0028] The accompanying drawings are marked as follows: 1. pressurized cylinder sleeve; 2. piston; 3. pressurized chamber; 4. connecting seat; 5. socket; 6. insert tube; 7. locking screw; 8. nut; 9. inlet and outlet pipes; 10. transfer pipe; 11. one-way valve; 12. first screw rod; 13. guide rod; 14. motor; 15. bottom plate; 16. first protective cover; 17. turntable; 18. connecting rod; 19. first gear; 20. rack; 21. gearbox; 22. guide rail; 23. cleaning block; 2301, housing; 2302, contact block; 2303, compression spring; 24. second screw rod; 25. second gear; 26. gear ring; 27. second protective cover. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative and are not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Reference Figure 1-9 The present invention provides a safety device for pressurizing oil production, including a pressurizing component, a driving component and a cleaning component. The pressurizing component includes two pressurizing cylinder sleeves 1 and a piston 2. A pressurizing chamber 3 is provided in the middle of the pressurizing cylinder sleeve 1, and the pressurizing chamber 3 is an open structure. The piston 2 is sealed and slidably installed between the pressurizing chambers 3 of the two pressurizing cylinder sleeves 1, and when the piston 2 slides and pressurizes in one pressurizing chamber 3, a negative pressure will be synchronously formed in the other pressurizing chamber 3 to absorb the pressurized medium. The driving component is connected to the piston 2, and the driving component includes a first screw rod 12, which is rotatably installed in the middle of the two pressurizing chambers 3, and the first screw rod 12 can drive the piston 2 to slide. The cleaning component is connected to the piston 2, and the cleaning component can synchronously clean the inner wall of the pressurizing cylinder sleeve 1 when the piston 2 slides.

[0031] When in use, it is only necessary to drive the piston 2 to slide back and forth in the two pressurized chambers 3 through the first screw 12 in the driving assembly. During this process, when the piston 2 slides toward one pressurized chamber 3, the pressurized medium inside the pressurized chamber 3 will be squeezed out into the underground oil reservoir. At the same time, the piston 2 will also form a negative pressure in the other pressurized chamber 3, and the negative pressure will absorb the external pressurized medium into it. This reciprocating process can continuously input pressure to the underground oil reservoir, thereby ensuring the efficiency of oil and natural gas extraction.

[0032] The pressurizing assembly also includes a connecting seat 4, which has a connecting port extending therethrough in the middle. The openings of the two pressurizing chambers 3 are respectively connected to the connecting ports, and the piston 2 can slide in the connecting port. A wedge-shaped socket 5 is provided on the edge of the connecting port. A wedge-shaped insert 6 is fixedly installed on the opening edge of the pressurizing chamber 3, and the insert 6 can be tightly inserted into the socket 5.

[0033] Thus, during installation, the opening of the pressurizing chamber 3 can be aligned with the connecting port of the connecting seat 4 by simply aligning the inserting tube 6 with the socket 5 and inserting it tightly, thereby achieving the communication between the two pressurizing chambers 3 .

[0034] The pressurizing assembly also includes a locking screw 7 and a nut 8. The surfaces of the pressurizing cylinder sleeve 1 and the connecting seat 4 are both provided with mounting holes. When the pressurizing chamber 3 is aligned with the connecting port, the locking screw 7 can be simultaneously inserted into the mounting holes on the surfaces of the pressurizing cylinder sleeve 1 and the connecting seat 4. The nut 8 is threadedly installed at both ends of the locking screw 7. After the nut 8 is tightened, the pressurizing cylinder sleeve 1 and the connecting seat 4 remain fixed.

[0035] In this way, it is only necessary to keep the mounting holes of the connecting seat 4 and the pressurized cylinder sleeve 1 aligned when the insert pipe 6 is inserted into the socket 5, and then insert the locking screw 7 into the mounting holes of the two, and then tighten the nuts 8 at both ends of the locking screw 7 to complete the fixation of the pressurized cylinder sleeve 1 and the connecting seat 4.

[0036] The pressurizing component also includes an inlet and outlet pipe 9 and a transfer pipe 10. The inlet and outlet pipe 9 is installed on the surface of the pressurizing cylinder sleeve 1, and the inlet and outlet pipe 9 is connected to the pressurizing chamber 3. The two ends of the transfer pipe 10 can be connected to the external pressurized medium and the underground oil reservoir respectively. The end of the inlet and outlet pipe 9 away from the pressurized cylinder sleeve 1 is connected to the middle of the transfer pipe 10. Two groups of one-way valves 11 are installed on the transfer pipe 10, and the two groups of one-way valves 11 are respectively located at the two ends of the connection between the inlet and outlet pipe 9 and the transfer pipe 10. At the same time, under the action of the two groups of one-way valves 11, the external pressurized medium entering the transfer pipe 10 can only flow from the transfer pipe 10 to the underground oil reservoir.

[0037] In this way, when the piston 2 slides back and forth in the two pressurizing chambers 3, when the piston 2 slides toward one pressurizing chamber 3, the pressurized medium inside the pressurizing chamber 3 will be squeezed out from the inlet and outlet pipes 9, and then flow out from the transfer pipe 10 to the underground oil reservoir. At the same time, the piston 2 will also form a negative pressure in the other pressurizing chamber 3, and the negative pressure will absorb the external pressurized medium through the inlet and outlet pipes 9, and so on.

[0038] The driving assembly includes a guide rod 13, a motor 14 and a transmission assembly. The guide rod 13 is fixedly installed in the two pressurizing chambers 3. The piston 2 is sealingly and slidably installed on the surface of the guide rod 13. The bottom surface of the pressurized cylinder sleeve 1 is installed with a base plate 15. The motor 14 is fixedly installed on the base plate 15. The transmission assembly is installed between the motor 14 and the first screw rod 12. The motor 14 can drive the first screw rod 12 to reciprocate through the transmission assembly. The surface of the first screw rod 12 is provided with a foldable first protective cover 16, and the first protective cover 16 is connected between the piston 2 and the inner wall of the pressurizing chamber 3.

[0039] In this way, the motor 14 only needs to be started, and the motor 14 will drive the first screw rod 12 to rotate through the transmission assembly. At this time, the piston 2 will slide along the axis of the first screw rod 12 under the driving of the first screw rod 12 and the limiting effect of the guide rod 13.

[0040] The transmission assembly includes a turntable 17, a connecting rod 18, a first gear 19, a rack 20 and a gearbox 21. The turntable 17 is fixedly mounted on the output shaft of the motor 14. A guide rail 22 is fixedly mounted on the surface of the base plate 15. The rack 20 is slidably mounted on the guide rail 22. One end of the connecting rod 18 is eccentrically connected to the surface of the turntable 17 for rotation, and the other end is connected to the surface of the rack 20 for rotation. The first gear 19 is coaxially connected to the output end of the gearbox 21, and the first gear 19 is meshed with the rack 20. The output end of the gearbox 21 is coaxially connected to the first screw rod 12.

[0041] In this way, after the motor 14 is started, it will drive the turntable 17 to rotate, and the turntable 17 will drive the rack 20 to slide back and forth on the guide rail 22 through the connecting rod 18, thereby driving the first gear 19 to reciprocate, and then drive the first screw rod 12 to reciprocate through the gearbox 21.

[0042] The cleaning assembly includes a cleaning block 23, which is installed on the side of the piston 2, and the cleaning block 23 is in close contact with the inner wall of the pressurized chamber 3. The cleaning block 23 is equipped with a power assembly, and the cleaning block 23 can rotate around the inner wall of the pressurized chamber 3 under the action of the power assembly. In this way, the inner wall of the pressurized chamber 3 on the side of the piston 2 can be cleaned, thereby preventing debris attached to the inner wall of the pressurized chamber 3 from entering the gap between the piston 2 and the inner wall of the pressurized chamber 3, thereby protecting the sealing of the piston 2 and the pressurized chamber 3.

[0043] The power assembly includes a second screw rod 24, a second gear 25 and a ring gear 26. The second screw rod 24 is fixedly installed in the two pressurizing chambers 3. The piston 2 is slidably sleeved on the surface of the second screw rod 24. The second gear 25 is rotatably installed on the side of the piston 2. At the same time, the second gear 25 and the second screw rod 24 are threadedly connected without self-locking properties. The ring gear 26 is rotatably installed on the side of the piston 2, and the ring gear 26 is meshed with the second gear 25. The cleaning block 23 is fixedly installed on the side of the ring gear 26. The surface of the second screw rod 24 is sleeved with a foldable second protective cover 27, and the second protective cover 27 is connected between the second gear 25 and the inner wall of the pressurizing chamber 3 (it should be noted that the contact part between the second protective cover 27 and the second gear 25 is a rotationally connected relationship, thereby ensuring that the second gear 25 can protect the surface of the second screw rod 24 when it rotates continuously).

[0044] In this way, the piston 2 will drive the second gear 25 to move synchronously during the reciprocating sliding process. Since the threaded connection between the second gear 25 and the second screw rod 24 is not self-locking, the second gear 25 will rotate by the reaction force of the second screw rod 24 during the synchronous movement, which will drive the ring gear 26 to rotate, and the ring gear 26 will drive the cleaning block 23 to rotate.

[0045] The cleaning block 23 includes a shell 2301, a contact block 2302 and a compression spring 2303. The shell 2301 is fixedly connected to the gear ring 26. The surface of the shell 2301 close to the inner wall of the pressurized chamber 3 is an open structure. The contact block 2302 is slidably installed in the shell 2301. The compression spring 2303 is connected between the contact block 2302 and the inner wall of the shell 2301. The contact block 2302 is kept in close contact with the inner wall of the pressurized chamber 3 under the action of the compression spring 2303. In this way, it can be ensured that when a small amount of wear occurs, the contact block 2302 automatically compensates for the wear gap to ensure the cleaning effect of the inner wall of the pressurized chamber 3.

[0046] Therefore, the complete usage process is to first connect the feed port of the transfer pipe 10 with the external pressurized medium, and connect the discharge port of the transfer pipe 10 with the connecting pipe of the underground oil reservoir, and then start the motor 14. The motor 14 will drive the turntable 17 to rotate, and the turntable 17 will drive the rack 20 to slide back and forth on the guide rail 22 through the connecting rod 18, thereby driving the first gear 19 to rotate back and forth, and then drive the first screw rod 12 to rotate back and forth through the gearbox 21. The first screw rod 12 will drive the piston 2 to slide back and forth in the two pressurized chambers 3. In this process, when the piston 2 slides toward one pressurized chamber 3, the pressurized medium inside the pressurized chamber 3 will be squeezed out from the inlet and outlet pipes 9, and then flow out from the transfer pipe 10 to the underground oil reservoir. At the same time, the piston 2 will also form a negative pressure in the other pressurized chamber 3, and the negative pressure will absorb the external pressurized medium through the inlet and outlet pipes 9. In this way, pressure can be continuously input to the underground oil reservoir, thereby ensuring the efficiency of oil and natural gas extraction.

[0047] Among them, the piston 2 will drive the second gear 25 to move synchronously during the reciprocating sliding process. Since the threaded connection between the second gear 25 and the second screw rod 24 is not self-locking, the second gear 25 will rotate by the reaction force of the second screw rod 24 during the synchronous movement, which will drive the ring gear 26 to rotate, and the ring gear 26 will drive the cleaning block 23 to rotate. The cleaning block 23 will continuously clean the inner wall of the pressurized chamber 3 on the side of the piston 2, thereby preventing debris attached to the inner wall of the pressurized chamber 3 from entering the gap between the piston 2 and the inner wall of the pressurized chamber 3, thereby protecting the sealing of the piston 2 and the pressurized chamber 3.

[0048] In summary, during use, the first screw rod 12 in the driving assembly is used to drive the piston 2 to slide, thereby achieving the effect of multiple groups of pressurization. Under this structure, the reaction force fed back by the piston 2 is parallel to the axis of the first screw rod 12, that is, the main force-bearing component (the first screw rod 12) bears the axial force. In this way, at the same size, it will be able to withstand a larger load, and the axial length of the first screw rod 12 is sufficient, so as to effectively ensure that the piston 2 has sufficient stroke, therefore, the rotation speed can be effectively reduced, thereby reducing noise, vibration and wear.

[0049] At the same time, during use, the sliding of the piston 2 will also synchronously drive the cleaning component to clean the inner wall of the pressurized chamber 3, which will effectively reduce the entry of tiny particles in the pressurized medium from the gap between the piston 2 and the pressurized chamber 3, thereby protecting the seal between the piston 2 and the pressurized chamber 3.

[0050] Moreover, under the action of the cleaning component, when the equipment stops operating and causes the liquid pressurized medium in the pressurized chamber 3 to precipitate, the continuously rotating cleaning block 23 in the cleaning component can form stirring in the pressurized chamber 3, thereby ensuring that the pressurized medium is uniform and stable, and can also prevent the sediment at the bottom of the pressurized chamber 3 from causing a large damping to the sliding of the piston 2, further enhancing the protection of the piston 2.

[0051] Finally, it should be noted that: the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the present invention can be combined with each other;

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety device for oil extraction pressurization, Features: The invention comprises a pressurizing component, a driving component and a cleaning component. The pressurizing component comprises two pressurizing cylinder sleeves (1) and a piston (2). A pressurizing chamber (3) is provided in the middle of the pressurizing cylinder sleeves (1), and the pressurizing chamber (3) is an open structure. The piston (2) is sealingly slidably installed between the pressurizing chambers (3) of the two pressurizing cylinder sleeves (1). When the piston (2) slides and pressurizes in one pressurizing chamber (3), negative pressure is synchronously formed in the other pressurizing chamber (3) to absorb the pressurized medium. The driving component is connected to the piston (2). The driving component comprises a first screw rod (12). The first screw rod (12) is rotatably installed in the middle of the two pressurizing chambers (3), and the first screw rod (12) can drive the piston (2) to slide. The cleaning component is connected to the piston (2), and the cleaning component can synchronously clean the inner wall of the pressurizing cylinder sleeve (1) when the piston (2) slides.

2. A petroleum production pressurization safety device according to claim 1, Features: The pressurizing assembly also includes a connecting seat (4), a connecting port extending through the middle of the connecting seat (4), the openings of the two pressurizing chambers (3) are respectively connected to the connecting ports, and the piston (2) can slide in the connecting ports. A wedge-shaped socket (5) is provided at the edge of the connecting port, and a wedge-shaped insert (6) is fixedly installed at the opening edge of the pressurizing chamber (3), and the insert (6) can be tightly inserted into the socket (5).

3. A petroleum production pressurization safety device according to claim 2, Features: The pressurizing assembly further comprises a locking screw (7) and a nut (8). The surfaces of the pressurizing cylinder sleeve (1) and the connecting seat (4) are both provided with mounting holes. When the pressurizing chamber (3) is aligned with the connecting port, the locking screw (7) can be simultaneously inserted into the mounting holes on the surfaces of the pressurizing cylinder sleeve (1) and the connecting seat (4). The nut (8) is threadedly mounted on both ends of the locking screw (7). After the nut (8) is tightened, the pressurizing cylinder sleeve (1) and the connecting seat (4) remain fixed.

4. A petroleum production pressurization safety device according to any one of claims 1 to 3, Features: The pressurizing assembly further comprises an inlet and outlet pipe (9) and a transfer pipe (10). The inlet and outlet pipe (9) is mounted on the surface of the pressurizing cylinder sleeve (1), and the inlet and outlet pipe (9) is connected to the pressurizing chamber (3). The two ends of the transfer pipe (10) can be respectively connected to the external pressurized medium and the underground oil reservoir. The end of the inlet and outlet pipe (9) away from the pressurizing cylinder sleeve (1) is connected to the middle of the transfer pipe (10). Two groups of one-way valves (11) are mounted on the transfer pipe (10), and the two groups of one-way valves (11) are respectively located at the two ends of the connection between the inlet and outlet pipe (9) and the transfer pipe (10). At the same time, under the action of the two groups of one-way valves (11), the external pressurized medium entering the transfer pipe (10) can only flow from the transfer pipe (10) to the underground oil reservoir.

5. A petroleum production pressurization safety device according to claim 1, Features: The driving assembly comprises a guide rod (13), a motor (14) and a transmission assembly. The guide rod (13) is fixedly mounted in two pressurizing chambers (3). The piston (2) is sealingly and slidably mounted on the surface of the guide rod (13). A bottom plate (15) is mounted on the bottom surface of the pressurizing cylinder sleeve (1). The motor (14) is fixedly mounted on the bottom plate (15). The transmission assembly is mounted between the motor (14) and the first screw rod (12). The motor (14) can drive the first screw rod (12) to reciprocate through the transmission assembly. A foldable first protective cover (16) is mounted on the surface of the first screw rod (12), and the first protective cover (16) is connected between the piston (2) and the inner wall of the pressurizing chamber (3).

6. A petroleum production pressurization safety device according to claim 5, Features: The transmission assembly comprises a rotating disk (17), a connecting rod (18), a first gear (19), a rack (20) and a gearbox (21); the rotating disk (17) is fixedly mounted on the output shaft of the motor (14); a guide rail (22) is fixedly mounted on the surface of the bottom plate (15); the rack (20) is slidably mounted on the guide rail (22); one end of the connecting rod (18) is eccentrically connected to the surface of the rotating disk (17) for rotation, and the other end is connected to the surface of the rack (20) for rotation; the first gear (19) is coaxially connected to the output end of the gearbox (21), and the first gear (19) is meshed with the rack (20); and the output end of the gearbox (21) is coaxially connected to the first screw rod (12).

7. A petroleum production pressurization safety device according to claim 1, Features: The cleaning assembly comprises a cleaning block (23), which is mounted on the side of the piston (2) and is in close contact with the inner wall of the pressurizing chamber (3). The cleaning block (23) is provided with a power assembly, and the cleaning block (23) can rotate around the inner wall of the pressurizing chamber (3) under the action of the power assembly.

8. A petroleum production pressurization safety device according to claim 7, Features: The power assembly comprises a second screw rod (24), a second gear (25) and a gear ring (26); the second screw rod (24) is fixedly mounted in the two pressurizing chambers (3); the piston (2) is slidably sleeved on the surface of the second screw rod (24); the second gear (25) is rotatably mounted on the side of the piston (2); the second gear (25) and the second screw rod (24) are threadedly connected without self-locking properties; the gear ring (26) is rotatably mounted on the side of the piston (2); the gear ring (26) is meshed with the second gear (25); the cleaning block (23) is fixedly mounted on the side of the gear ring (26); the surface of the second screw rod (24) is sleeved with a foldable second protective cover (27); and the second protective cover (27) is connected between the second gear (25) and the inner wall of the pressurizing chamber (3).

9. A petroleum production pressurization safety device according to claim 7 or 8, Features: The cleaning block (23) comprises a shell (2301), a contact block (2302) and a compression spring (2303); the shell (2301) is fixedly connected to the gear ring (26); the surface of the shell (2301) close to the inner wall of the pressurized chamber (3) is an open structure; the contact block (2302) is slidably installed in the shell (2301); the compression spring (2303) is connected between the contact block (2302) and the inner wall of the shell (2301); and the contact block (2302) is kept in close contact with the inner wall of the pressurized chamber (3) under the action of the compression spring (2303).

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