Long service life fatigue-resistant fracturing pump for oil drilling and production

Abstract

This invention belongs to the field of petroleum drilling and production technology, and discloses a long-life, fatigue-resistant fracturing pump for petroleum drilling and fracturing equipment. It includes a fracturing pump body, with side covers movably mounted on both sides of the pump body. Support components are fixedly mounted on the outer surfaces of the side covers, and a frame is fixedly mounted on the front of the pump body. This invention achieves self-entry and self-exit of lubricating oil through the reciprocating motion of the fracturing pump combined with the fluidity of the lubricating oil, achieving dynamic balance. The flow of lubricating oil effectively lubricates the continuous piston movement, reducing friction and avoiding excessive wear caused by prolonged use or excessive loads in traditional equipment. It not only achieves piston self-lubrication but also realizes dynamic balance of the lubricating oil, preventing the lubricating oil from affecting piston movement, improving piston efficiency, and extending the service life of the equipment. It is suitable for use under long-term high-load conditions.

Description

Technical Field

[0001] This invention belongs to the field of petroleum drilling and production technology, specifically a fracturing pump for long-life, fatigue-resistant petroleum drilling and fracturing equipment. Background Technology

[0002] In the petroleum industry, fracturing refers to a method of creating fractures in oil and gas reservoirs using hydraulic force during oil or gas production; it is also known as hydraulic fracturing. Fracturing artificially creates fractures in the formation, improving the underground flow environment for oil and increasing well production. It plays a crucial role in improving bottomhole flow conditions, mitigating inter-layer flow, and improving reservoir dynamics. During fracturing, fracturing pumps are typically used as fracturing tools in oil drilling and production. The key function of the fracturing pump is to transport fracturing fluid to the bottom of the well under high pressure, causing the rock at the bottom to fracture, creating numerous fractures. This method increases oil and gas permeability and accelerates the flow of oil and gas beneath the formation, thereby increasing oil and gas production. Therefore, fracturing pumps hold a significant position in oil extraction and are an indispensable part of the process.

[0003] Common fracturing pumps have a relatively complex structure. Their main principle is to use an external motor or internal combustion engine to drive the rotation of the internal main shaft. The crankshaft on the outer side of the main shaft drives the connecting rod on the front to reciprocate, and the piston reciprocates to provide a certain pressure. Depending on the number of cylinders, they are mainly divided into three-cylinder and five-cylinder pumps. However, in actual operation, the continuous rotation of the main shaft will inevitably drive the reciprocating motion of the connecting rod, and the piston will continuously reciprocate inside the cylinder wall. This will cause continuous friction between the piston and the cylinder wall. Over time or under excessive load, this can easily lead to excessive wear of the piston, which will damage the piston and affect the actual operation.

[0004] Since fracturing pumps mainly utilize continuous rotational motion to convert it into continuous reciprocating motion, obviously, during the entire mechanical motion process, a certain eccentric force will be generated due to the crankshaft movement. At this time, the eccentric force will directly act on the valve body of the fracturing pump itself, causing the fracturing pump to vibrate. In the existing technology, buffer devices are installed to reduce the impact of the pressure pump on the ground to eliminate the impact of vibration. However, the buffer device itself will cause excessive shaking, which in turn will increase the shaking of the pressure pump, causing a significant impact on the operation of the pressure pump. Summary of the Invention

[0005] The purpose of this invention is to provide a long-life, fatigue-resistant fracturing pump for oil drilling and fracturing equipment, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment, comprising a fracturing pump body, side covers movably mounted on both the left and right sides of the fracturing pump body, support components fixedly mounted on the outer surfaces of the side covers, a frame fixedly mounted on the front of the fracturing pump body, an oil storage tank fixedly mounted on the top of the frame, a plunger assembly fixedly mounted on the front of the frame, a fracturing chamber provided on the front of the plunger assembly, the back of the fracturing chamber connected to the front of the plunger assembly, a heat spreader fixedly mounted on the top of the oil storage tank, a main shaft movably mounted in the middle of the fracturing pump body, drive shafts fixedly mounted on both the left and right ends of the main shaft, one end of the drive shaft penetrating one side of the side cover, the drive shaft being connected to an external transmission device, a drive gear located inside the side cover fixedly sleeved on the outer surface of the main shaft, and a driven gear meshing with the lower right side of the drive gear.

[0007] Before using the device, it is necessary to connect it to the external transmission device, that is, connect the drive shaft to the external motor or internal combustion engine, place the device on a flat surface, connect it to the external accessories, and fill the oil tank with lubricating oil. The lubricating oil should be a fluid lubricating oil with good fluidity at room temperature. This completes the preparation work.

[0008] As a further technical solution of the present invention, there are three plunger assemblies in total, which are evenly distributed on the front side of the fracturing pump body. The front side of the fracturing pump body is provided with through holes located behind the plunger assemblies at equal intervals. Cranks are evenly installed on the outer side of the main shaft, and one end of the crank passes through the through hole and is connected to the back side of the plunger assembly.

[0009] When the external transmission device drives the main shaft to rotate through the transmission shaft, it can also drive the crank on its outer side to rotate. In turn, the crank drives one end of the plunger assembly to reciprocate, and the reciprocating motion acts on the inside of the fracturing chamber on the front side of the device. It works in conjunction with the device inside the fracturing chamber to complete the fracturing operation. The three plunger assemblies can achieve continuous reciprocating motion to improve fracturing efficiency.

[0010] As a further technical solution of the present invention, the plunger assembly includes a connecting rod connected to the front side of the crank, the plunger assembly also includes a lubrication pipe connected to the back side of the lubrication pipe connected to the front side of the frame, a piston located inside the lubrication pipe is fixedly sleeved on the outer side of the connecting rod, the piston is movably sleeved with the lubrication pipe, and the front end of the connecting rod passes through the front end of the lubrication pipe and is movably sleeved with the interior of the fracturing chamber.

[0011] As a further technical solution of the present invention, a temporary storage tank is fixedly connected to the top of the lubrication pipe near the rear. The front of the temporary storage tank is fixedly connected to the front of the oil storage tank. A drip hole is opened at the bottom of the temporary storage tank. The drip hole is connected to the inside of the lubrication pipe. An impeller is movably installed inside the recovery pipe.

[0012] As a further technical solution of the present invention, the plunger assembly also includes a recovery tube, which is fixedly sleeved on the lubrication pipe near the front end. A recovery hole is opened at the bottom end of the lubrication pipe near the front end. The recovery hole is connected to the interior of the recovery tube. A return pipe is fixedly connected to the rear of the bottom end of the recovery tube. The return pipe is connected to one side of the temporary storage tank.

[0013] As a further technical solution of the present invention, the drip hole, the recovery hole and the return pipe are all equipped with one-way valves, and the valves are respectively open inward and closed outward, and open outward and closed inward.

[0014] During fracturing, the lubricating oil inside the reservoir can directly enter the temporary storage tank in front of it. When the connecting rod is in the return stroke, the piston is located at the left end of the temporary storage tank. At this time, the hydraulic oil inside the temporary storage tank will fall with gravity, driving the impeller to rotate, and being discharged through the drip hole into the lubrication pipe below to lubricate the contact surface between the piston and the lubrication pipe. When the connecting rod is in the stroke, the piston moves forward, pushing the hydraulic oil inside the lubrication pipe forward and dripping from the recovery hole into the recovery pipe. It then flows back into the temporary storage tank through the return pipe behind the recovery pipe to complete the cycle. Due to the continuous reciprocating motion of the connecting rod, the injection and ejection of lubricating oil can be realized, achieving effective lubrication.

[0015] By utilizing the reciprocating motion of the fracturing pump itself in conjunction with the fluidity of the lubricating oil, self-entry and self-exit of the lubricating oil can be achieved, and dynamic balance can be realized. The flow of lubricating oil can effectively lubricate the continuous piston movement, reduce friction, and avoid excessive wear caused by prolonged use or excessive load in traditional equipment. It not only achieves self-lubrication of the piston, but also achieves dynamic balance of the lubricating oil, avoiding the influence of lubricating oil on piston movement, improving piston movement efficiency, and extending the service life of the equipment. It is suitable for use under long-term high-load conditions.

[0016] As a further technical solution of the present invention, the support assembly includes a three-way valve, one end of which is connected to the left and right ends of the oil storage tank, the bottom end of which is fixedly connected to a connecting pipe, and the bottom end of the connecting pipe is fixedly connected to a flexible hose. The support assembly also includes a fixing plate, one end of which is fixedly connected to the side of the fracturing pump body, and an oil storage cylinder is provided below the fixing plate. The bottom end of the oil storage cylinder is fixedly installed with a base located below the fracturing pump body.

[0017] As a further technical solution of the present invention, a movable rod is fixedly installed at the bottom end of the fixed plate, the movable rod passes through the top end of the oil storage cylinder and a movable plug is fixedly installed thereon, the movable plug is movably connected to the inside of the oil storage cylinder, and an oil inlet pipe is opened inside the movable rod, passing through the bottom end of the movable plug.

[0018] As a further technical solution of the present invention, the top end of the fixed plate is fixedly connected to the other end of the hose, the oil inlet pipe is connected to the inside of the hose, and a return spring is movably sleeved on the outer side of the movable rod. The upper and lower ends of the return spring are fixedly connected to the top end of the inner cavity of the oil storage cylinder and the top end of the movable plug, respectively.

[0019] When the rotational motion of the main shaft inside the device is converted into the piston motion, it will cause a certain vibration of the device itself. At this time, the vibration will be transmitted to the fixed plate through the side cover and drive the displacement of the movable rod and the movable plug relative to the oil reservoir. At this time, the return spring located on the outer side of the movable rod can buffer the impact. At the same time, when the lubricating oil falls inside the temporary storage tank, it will drive the impeller to rotate. The rotation of the impeller can drive the flow of lubricating oil in the opposite direction. The flowing lubricating oil will enter the interior of the oil reservoir through the three-way valve, the connecting pipe, the hose and the oil inlet pipe. At this time, the lubricating oil will fill the position between the movable plug and the oil reservoir, and the pressure of the lubricating oil will counteract the continuous vibration from the return spring, reduce the harmonic motion and improve the stability of the fracturing pump body.

[0020] By utilizing the piston movement of the fracturing pump to cause the lubricating oil to flow, and using the flowing lubricating oil to act as a buffer for the device, excessive vibration during buffering is reduced, and intermittent movement is decreased. This avoids the problem that while installing a buffer device in traditional devices can reduce the impact on the ground, it can also increase the excessive vibration of the device. This not only reduces the impact on the ground but also suppresses excessive vibration, thus improving the stability of the device. The use of lubricating oil not only achieves self-lubrication but also provides stable support, significantly improving the practicality of the device.

[0021] As a further technical solution of the present invention, a sealed bearing is fixedly sleeved on the outer side of the spindle, and a sealing cover located inside the side cover is fixedly sleeved on the outer side of the sealed bearing. The left end of the sealing cover is fixedly connected to the inner side of the side cover. An oil inlet hole is opened on the front side of the spindle, and the oil inlet hole is connected to the inside of the sealing cover. An oil supply pipe is fixedly connected to the front side of the sealing cover, and the other end of the oil supply pipe is connected to the back of the three-way valve.

[0022] When the lubricating oil enters and exits due to the piston's action, the impeller inside the storage tank rotates, which in turn drives the flow of lubricating oil. The flowing lubricating oil then enters the three-way valve through the oil reservoir, and then enters the oil supply pipe through the three-way valve. It then enters the sealing cover through the oil supply pipe, and finally enters the main shaft through the oil inlet hole. Inside the main shaft, the lubricating oil flows and generates heat as it rotates. The lubricating oil inside the oil reservoir can be cooled by the heat dissipation plate at the top of the oil reservoir to prevent overheating, thus completing the circulation and cooling process.

[0023] By utilizing the piston movement of the fracturing pump to drive the flow of lubricating oil, and using the flowing lubricating oil to dissipate the heat of the main shaft, overheating caused by continuous rotation of the main shaft is avoided. At the same time, after absorbing the heat of the main shaft, the temperature of the lubricating oil itself increases, further increasing the fluidity of the lubricating oil and acting in the opposite direction to the lubrication process, thereby improving lubrication efficiency. This avoids the overheating problem that is prone to occur when traditional equipment operates under continuous high load. The device can also assist in cooling by using its own power. It not only achieves self-lubrication and stable support, but also has a strong heat dissipation capacity, making it suitable for widespread use.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention utilizes the reciprocating motion of the fracturing pump itself in conjunction with the fluidity of the lubricating oil to achieve self-entry and self-exit of the lubricating oil, and can achieve dynamic balance. The flow of the lubricating oil can effectively lubricate the continuous piston movement, reduce friction, and avoid excessive wear caused by prolonged use or excessive load of traditional devices. It not only achieves self-lubrication of the piston, but also achieves dynamic balance of the lubricating oil, avoiding the influence of the lubricating oil on the piston movement, improving the efficiency of piston movement, and extending the service life of the device. It is suitable for use under long-term high-load conditions.

[0026] 2. This invention utilizes the piston movement of the fracturing pump to cause the lubricating oil to flow, and uses the flowing lubricating oil to buffer the device, reducing excessive vibration during buffering and reducing intermittent movement. This avoids the problem that while installing a buffer device in traditional devices can reduce the impact on the ground, it can also increase the excessive vibration of the device. This invention not only reduces the impact on the ground but also suppresses excessive vibration, thus improving the stability of the device. The lubricating oil not only achieves self-lubrication but also provides stable support, significantly improving the practicality of the device.

[0027] 3. This invention utilizes the piston movement of the fracturing pump to drive the flow of lubricating oil, and uses the flowing lubricating oil to dissipate the heat of the main shaft, thus avoiding overheating caused by continuous rotation of the main shaft. At the same time, after absorbing the heat of the main shaft, the temperature of the lubricating oil itself increases, further increasing the fluidity of the lubricating oil and acting in the opposite direction to the lubrication process, improving lubrication efficiency. This avoids the overheating problem that is prone to occur when traditional devices operate under continuous high loads. The invention also uses its own power to assist the device in cooling down, achieving not only self-lubrication and stable support but also strong heat dissipation capacity, making it suitable for widespread use. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the side structure of the present invention;

[0030] Figure 3 This is an exploded view of the fracturing cavity structure of the present invention;

[0031] Figure 4 This is a separate schematic diagram of the supporting component structure of the present invention;

[0032] Figure 5 This is a separate internal exploded view of the supporting component structure of the present invention;

[0033] Figure 6 This is an exploded view of the side cover structure of the present invention;

[0034] Figure 7 This is an exploded view of the sealing cap structure of the present invention;

[0035] Figure 8 This is a schematic diagram showing the fit between the oil reservoir and the plunger assembly structure of the present invention;

[0036] Figure 9 This is a separate exploded view of the internal structure of the plunger assembly of the present invention.

[0037] In the diagram: 1. Fracturing pump body; 2. Side cover; 3. Main shaft; 4. Drive shaft; 5. Sealing cover; 6. Sealed bearing; 7. Oil inlet; 8. Drive gear; 9. Driven gear; 10. Oil delivery pipe; 11. Oil reservoir; 12. Heat exchanger plate; 13. Frame; 14. Fracturing chamber; 15. Plunger assembly; 151. Connecting rod; 152. Piston; 153. Lubrication pipe; 154. Temporary storage tank; 155. Impeller; 156. Drip hole; 157. Recovery pipe; 158. Recovery hole; 159. Return pipe; 16. Support assembly; 161. Three-way valve; 162. Connecting pipe; 163. Hose; 164. Fixing plate; 165. Movable rod; 166. Movable plug; 167. Oil reservoir cylinder; 168. Return spring; 169. Oil inlet pipe; 1610. Base. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1 and Figure 2 as well as Figure 3 and Figure 6 As shown in the embodiment of the present invention, a fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment includes a fracturing pump body 1. Side covers 2 are movably installed on both the left and right sides of the fracturing pump body 1. Support components 16 are fixedly installed on the outer sides of the side covers 2. A frame 13 is fixedly installed on the front of the fracturing pump body 1. An oil storage tank 11 is fixedly installed on the top of the frame 13. A plunger assembly 15 is fixedly installed on the front of the frame 13. A fracturing chamber 14 is provided on the front of the plunger assembly 15. The back of the fracturing chamber 14 is connected to the front of the plunger assembly 15. A heat spreader 12 is fixedly installed on the top of the oil storage tank 11. A main shaft 3 is movably installed in the middle of the fracturing pump body 1. A drive shaft 4 is fixedly installed on both the left and right ends of the main shaft 3. One end of the drive shaft 4 passes through one side of the side cover 2. The drive shaft 4 is connected to an external transmission device. A drive gear 8 located inside the side cover 2 is fixedly sleeved on the outer side of the main shaft 3. A driven gear 9 is meshed with the lower right side of the drive gear 8.

[0040] Before using the device, it is necessary to connect the device to the external transmission device, that is, connect the drive shaft 4 to the external motor or internal combustion engine, place the device on a flat surface, connect it to the external accessories, and fill the oil tank 11 with lubricating oil. The lubricating oil should be a lubricating oil with strong fluidity at room temperature. This completes the preparation work.

[0041] like Figure 3 As shown, there are three plunger assemblies 15, which are evenly distributed on the front of the fracturing pump body 1. The front of the fracturing pump body 1 has through holes at equal intervals located behind the plunger assemblies 15. Cranks are evenly installed on the outer side of the main shaft 3, and one end of the crank passes through the through hole and is connected to the back of the plunger assembly 15.

[0042] When the external transmission device drives the main shaft 3 to rotate through the transmission shaft 4, it can also drive the crank on its outer side to rotate. Then, through the rotation of the crank, one end of the plunger assembly 15 reciprocates, and the reciprocating motion is applied to the inside of the fracturing chamber 14 on the front side of the device. It works in conjunction with the device inside the fracturing chamber 14 to complete the fracturing operation. The three plunger assemblies 15 can achieve continuous reciprocating motion to improve fracturing efficiency.

[0043] like Figure 7 and Figure 8 as well as Figure 9 As shown, the plunger assembly 15 includes a connecting rod 151, which is connected to the front of the crank. The plunger assembly 15 also includes a lubrication pipe 153, the back of which is connected to the front of the frame 13. A piston 152 located inside the lubrication pipe 153 is fixedly sleeved on the outer side of the connecting rod 151. The piston 152 and the lubrication pipe 153 are movably sleeved together. The front end of the connecting rod 151 passes through the front end of the lubrication pipe 153 and is movably sleeved inside the fracturing chamber 14. A temporary storage tank 154 is fixedly connected to the top of the lubrication pipe 153 near the rear. The front of the temporary storage tank 154 is fixedly connected to the front of the oil reservoir 11. A drip hole 156 is provided at the bottom of the temporary storage tank 154. 56 is connected to the interior of the lubrication pipe 153. An impeller 155 is movably installed inside the recovery pipe 157. The plunger assembly 15 also includes a recovery pipe 157. The recovery pipe 157 is fixedly sleeved on the lubrication pipe 153 near the front end. A recovery hole 158 is opened at the bottom end of the lubrication pipe 153 near the front end. The recovery hole 158 is connected to the interior of the recovery pipe 157. A return pipe 159 is fixedly connected to the rear of the bottom end of the recovery pipe 157. The return pipe 159 is connected to one side of the temporary storage tank 154. One-way valves are installed inside the drip hole 156, the recovery hole 158, and the return pipe 159. The valves are respectively open inward and closed outward, and open outward and closed inward.

[0044] First embodiment:

[0045] During fracturing, the lubricating oil inside the oil reservoir 11 can directly enter the temporary storage tank 154 in front of it. When the connecting rod 151 is in the return stroke, the piston 152 is located at the left end of the temporary storage tank 154. At this time, the hydraulic oil inside the temporary storage tank 154 will fall with gravity, driving the impeller 155 to rotate, and being discharged through the drip hole 156 and entering the lubrication pipe 153 below to lubricate the contact surface between the piston 152 and the lubrication pipe 153. When the connecting rod 151 is in the stroke, the piston 152 moves forward, pushing the hydraulic oil inside the lubrication pipe 153 forward, and dripping from the recovery hole 158 into the recovery pipe 157. It then flows back into the temporary storage tank 154 through the return pipe 159 behind the recovery pipe 157 to complete the cycle. Due to the continuous reciprocating motion of the connecting rod 151, the injection and ejection of lubricating oil can be realized, achieving effective lubrication.

[0046] By utilizing the reciprocating motion of the fracturing pump itself in conjunction with the fluidity of the lubricating oil, self-entry and self-exit of the lubricating oil can be achieved, and dynamic balance can be realized. The flow of lubricating oil can effectively lubricate the continuous piston movement of piston 152, reduce friction, and avoid excessive wear caused by prolonged use or excessive load of traditional equipment. Not only is self-lubricating of piston 152 achieved, but dynamic balance of lubricating oil can also be achieved, avoiding the influence of lubricating oil on piston movement, improving piston movement efficiency, and extending the service life of the equipment. It is suitable for use under long-term high-load conditions.

[0047] like Figure 3 and Figure 4 as well as Figure 5 As shown, the support assembly 16 includes a three-way valve 161, one end of which is connected to the left and right ends of the oil storage tank 11. A connecting pipe 162 is fixedly connected to the bottom end of the three-way valve 161, and a flexible hose 163 is fixedly connected to the bottom end of the connecting pipe 162. The support assembly 16 also includes a fixing plate 164, one end of which is fixedly connected to the side of the fracturing pump body 1. An oil storage cylinder 167 is located below the fixing plate 164, and a base 1610 located below the fracturing pump body 1 is fixedly installed at the bottom end of the oil storage cylinder 167. A movable rod 16 is fixedly installed at the bottom end of the fixing plate 164. 5. The movable rod 165 passes through the top of the oil reservoir 167 and is fixedly installed with a movable plug 166. The movable plug 166 is movably connected to the inside of the oil reservoir 167. An oil inlet pipe 169 is opened inside the movable rod 165, passing through the bottom of the movable plug 166. The top of the fixed plate 164 is fixedly connected to the other end of the hose 163. The oil inlet pipe 169 is connected to the inside of the hose 163. A return spring 168 is movably sleeved on the outer side of the movable rod 165. The upper and lower ends of the return spring 168 are fixedly connected to the top of the inner cavity of the oil reservoir 167 and the top of the movable plug 166, respectively.

[0048] Second embodiment:

[0049] When the rotational motion of the main shaft 3 inside the device is converted into the piston motion of the piston 152, it will cause a certain vibration of the device itself. At this time, the vibration will be transmitted to the fixed plate 164 through the side cover 2 and drive the displacement of the movable rod 165 and the movable plug 166 relative to the oil storage cylinder 167. At this time, the return spring 168 located on the outer side of the movable rod 165 can buffer the impact. At the same time, when the lubricating oil falls inside the temporary storage tank 154, it will drive the impeller 155 to rotate. While the impeller 155 rotates, it can drive the flow of lubricating oil in the opposite direction. The flowing lubricating oil will enter the interior of the oil storage cylinder 167 through the three-way valve 161, the connecting pipe 162, the hose 163 and the oil inlet pipe 169. At this time, the lubricating oil will fill the position between the movable plug 166 and the oil storage cylinder 167, and the pressure of the lubricating oil will counteract the continuous vibration from the return spring 168, reduce the simple harmonic motion, and improve the stability of the fracturing pump body 1.

[0050] By utilizing the piston movement of the fracturing pump to cause the lubricating oil to flow, and using the flowing lubricating oil to act as a buffer for the device, excessive vibration during buffering is reduced, and intermittent movement is decreased. This avoids the problem that while installing a buffer device in traditional devices can reduce the impact on the ground, it can also increase the excessive vibration of the device. This not only reduces the impact on the ground but also suppresses excessive vibration, thus improving the stability of the device. The use of lubricating oil not only achieves self-lubrication but also provides stable support, significantly improving the practicality of the device.

[0051] like Figure 3 and Figure 7 As shown, a sealed bearing 6 is fixedly sleeved on the outer side of the main shaft 3, and a sealing cover 5 located inside the side cover 2 is fixedly sleeved on the outer side of the sealed bearing 6. The left end of the sealing cover 5 is fixedly connected to the inner side of the side cover 2. An oil inlet hole 7 is opened on the front side of the main shaft 3. The oil inlet hole 7 is connected to the inside of the sealing cover 5. An oil supply pipe 10 is fixedly connected to the front side of the sealing cover 5. The other end of the oil supply pipe 10 is connected to the back of the three-way valve 161.

[0052] Third embodiment:

[0053] When the lubricating oil enters and exits due to the action of the piston 152, the impeller 155 inside the temporary storage tank 154 rotates, thereby driving the flow of lubricating oil. The flowing lubricating oil then enters the three-way valve 161 through the oil reservoir 11, and enters the oil supply pipe 10 through the three-way valve 161. It then enters the sealing cover 5 through the oil supply pipe 10, and enters the main shaft 3 through the oil inlet 7 through the sealing cover 5. The lubricating oil flows inside the main shaft 3, driving the main shaft 3 to continuously rotate and dissipate heat. The lubricating oil inside the oil reservoir 11 can be cooled by the heat dissipation plate 12 at the top of the oil reservoir 11 to prevent the lubricating oil from overheating, thus completing the circulation and cooling.

[0054] By utilizing the piston movement of the fracturing pump to drive the flow of lubricating oil, and using the flowing lubricating oil to dissipate the heat of the main shaft 3, overheating caused by continuous rotation of the main shaft 3 is avoided. At the same time, after absorbing the heat of the main shaft 3, the temperature of the lubricating oil itself increases, further increasing the fluidity of the lubricating oil and acting in the opposite direction to the lubrication process, thereby improving lubrication efficiency. This avoids the overheating problem that is prone to occur when traditional devices operate under continuous high loads. The device can also assist in cooling by utilizing its own power. It not only achieves self-lubrication and stable support, but also has a strong heat dissipation capacity, making it suitable for widespread use.

[0055] Working principle and usage process:

[0056] During fracturing, the lubricating oil inside the oil reservoir 11 can directly enter the temporary storage tank 154 in front of it. When the connecting rod 151 is in the return stroke, the piston 152 is located at the left end of the temporary storage tank 154. At this time, the hydraulic oil inside the temporary storage tank 154 will fall with gravity, driving the impeller 155 to rotate, and being discharged through the drip hole 156 and entering the lubrication pipe 153 below to lubricate the contact surface between the piston 152 and the lubrication pipe 153. When the connecting rod 151 is in the stroke, the piston 152 moves forward, pushing the hydraulic oil inside the lubrication pipe 153 forward, and dripping from the recovery hole 158 into the recovery pipe 157. It then flows back into the temporary storage tank 154 through the return pipe 159 behind the recovery pipe 157 to complete the cycle. Due to the continuous reciprocating motion of the connecting rod 151, the lubricating oil injection and ejection process can be realized, achieving effective lubrication.

[0057] When the rotational motion of the main shaft 3 inside the device is converted into the piston motion of the piston 152, it will cause a certain vibration of the device itself. At this time, the vibration will be transmitted to the fixed plate 164 through the side cover 2 and drive the displacement of the movable rod 165 and the movable plug 166 relative to the oil storage cylinder 167. At this time, the return spring 168 located on the outer side of the movable rod 165 can buffer the impact. At the same time, when the lubricating oil falls inside the temporary storage tank 154, it will drive the impeller 155 to rotate. While the impeller 155 rotates, it can drive the flow of lubricating oil in the opposite direction. The flowing lubricating oil will enter the oil storage cylinder 167 through the three-way valve 161, the connecting pipe 162, the hose 163 and the oil inlet pipe 169. At this time, the lubricating oil will fill the position between the movable plug 166 and the oil storage cylinder 167, and use the pressure of the lubricating oil to counteract the continuous vibration from the return spring 168, reduce the simple harmonic motion, and improve the stability of the fracturing pump body 1.

[0058] When the lubricating oil enters and exits due to the action of the piston 152, the impeller 155 inside the temporary storage tank 154 rotates, thereby driving the flow of lubricating oil. The flowing lubricating oil then enters the three-way valve 161 through the oil reservoir 11, and enters the oil supply pipe 10 through the three-way valve 161. It then enters the sealing cover 5 through the oil supply pipe 10, and enters the main shaft 3 through the oil inlet 7 through the sealing cover 5. The lubricating oil flows inside the main shaft 3, driving the main shaft 3 to continuously rotate and dissipate heat. The lubricating oil inside the oil reservoir 11 can be cooled by the heat dissipation plate 12 at the top of the oil reservoir 11 to prevent the lubricating oil from overheating, thus completing the circulation and cooling.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment, comprising a fracturing pump body (1), characterized in that: Side covers (2) are movably installed on both the left and right sides of the fracturing pump body (1). Support components (16) are fixedly installed on the outer surfaces of the side covers (2). A frame (13) is fixedly installed on the front of the fracturing pump body (1). An oil storage tank (11) is fixedly installed on the top of the frame (13). A plunger assembly (15) is fixedly installed on the front of the frame (13). A fracturing chamber (14) is provided on the front of the plunger assembly (15). The back of the fracturing chamber (14) is connected to the front of the plunger assembly (15). A heat spreader plate (12) is fixedly installed at the top of the oil storage tank (11). A main shaft (3) is movably installed in the middle of the fracturing pump body (1). A drive shaft (4) is fixedly installed at both ends of the main shaft (3). One end of the drive shaft (4) passes through one side of the side cover (2). The drive shaft (4) is connected to an external transmission device. A drive gear (8) located inside the side cover (2) is fixedly sleeved on the outer side of the main shaft (3). A driven gear (9) is meshed with the lower right side of the drive gear (8). The plunger assembly (15) includes a connecting rod (151) connected to the front of a crank. The plunger assembly (15) also includes a lubrication conduit (153) connected to the back of a frame (13). A piston (152) located inside the lubrication conduit (153) is fixedly sleeved on the outer side of the connecting rod (151). The piston (152) is movably sleeved with the lubrication conduit (153). The front end of the connecting rod (151) passes through the front end of the lubrication conduit (153) and is movably sleeved with the interior of the fracturing chamber (14). A temporary storage tank (154) is fixedly connected to the top of the lubrication pipe (153) near the rear. The front of the temporary storage tank (154) is fixedly connected to the front of the oil storage tank (11). A drip hole (156) is opened at the bottom of the temporary storage tank (154). The drip hole (156) is connected to the inside of the lubrication pipe (153). An impeller (155) is movably installed inside the temporary storage tank (154). The plunger assembly (15) also includes a recovery pipe (157), which is fixedly sleeved on the lubrication pipe (153) near the front end. A recovery hole (158) is provided at the bottom end of the lubrication pipe (153) near the front end. The recovery hole (158) is connected to the interior of the recovery pipe (157). A return pipe (159) is fixedly connected to the rear of the bottom end of the recovery pipe (157). The return pipe (159) is connected to one side of the temporary storage tank (154). During fracturing, the lubricating oil inside the reservoir (11) can directly enter the temporary storage tank (154) in front of it. When the connecting rod (151) is in the return stroke, the piston (152) is located at the left end of the temporary storage tank (154). At this time, the hydraulic oil inside the temporary storage tank (154) will fall with gravity, driving the impeller (155) to rotate, and at the same time, it will be discharged through the drip hole (156) and enter the lubrication pipe (153) below, which will affect the piston (152) and the lubrication pipe. The contact surface of the lubrication pipe (153) is lubricated. When the connecting rod (151) is in the stroke, the piston (152) moves forward and pushes the hydraulic oil inside the lubrication pipe (153) forward. The oil drips from the recovery hole (158) into the recovery pipe (157) and flows back to the storage tank (154) through the return pipe (159) behind the recovery pipe (157) to complete the cycle. The continuous reciprocating motion of the connecting rod (151) enables the injection and ejection of lubricating oil.

2. The fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment according to claim 1, characterized in that: There are three plunger assemblies (15) in total, which are evenly distributed on the front of the fracturing pump body (1). The front of the fracturing pump body (1) is provided with through holes located behind the plunger assemblies (15) at equal intervals. Cranks are installed at equal intervals on the outer side of the main shaft (3), and one end of the crank passes through the through hole and is connected to the back of the plunger assembly (15).

3. The fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment according to claim 1, characterized in that: The drip hole (156), the recovery hole (158), and the return pipe (159) are all equipped with one-way valves, and the valves are respectively open inward and closed outward, and open outward and closed inward.

4. The fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment according to claim 1, characterized in that: The support assembly (16) includes a three-way valve (161), one end of which is connected to the left and right ends of the oil storage tank (11). The bottom end of the three-way valve (161) is fixedly connected to a connecting pipe (162), and the bottom end of the connecting pipe (162) is fixedly connected to a flexible hose (163). The support assembly (16) also includes a fixing plate (164), one end of which is fixedly connected to the side of the fracturing pump body (1). An oil storage cylinder (167) is provided below the fixing plate (164), and a base (1610) located below the fracturing pump body (1) is fixedly installed at the bottom end of the oil storage cylinder (167).

5. A fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment according to claim 4, characterized in that: A movable rod (165) is fixedly installed at the bottom end of the fixed plate (164). The movable rod (165) passes through the top end of the oil reservoir (167) and is fixedly installed with a movable plug (166). The movable plug (166) is movably connected to the inside of the oil reservoir (167). An oil inlet pipe (169) is opened inside the movable rod (165) and passes through the bottom end of the movable plug (166).

6. A fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment according to claim 5, characterized in that: The top end of the fixed plate (164) is fixedly connected to the other end of the hose (163), the oil inlet pipe (169) is connected to the inside of the hose (163), and a return spring (168) is movably sleeved on the outer side of the movable rod (165). The upper and lower ends of the return spring (168) are fixedly connected to the top end of the inner cavity of the oil reservoir (167) and the top end of the movable plug (166), respectively.

7. The fracturing pump for long-life, fatigue-resistant oil drilling and fracturing equipment according to claim 1, characterized in that: A sealed bearing (6) is fixedly sleeved on the outer side of the main shaft (3). A sealing cover (5) located inside the side cover (2) is fixedly sleeved on the outer side of the sealed bearing (6). The left end of the sealing cover (5) is fixedly connected to the inner side of the side cover (2). An oil inlet hole (7) is opened on the front side of the main shaft (3). The oil inlet hole (7) is connected to the inside of the sealing cover (5). An oil supply pipe (10) is fixedly connected to the front side of the sealing cover (5). The other end of the oil supply pipe (10) is connected to the back of the three-way valve (161).

Images