A forming device for high-grade seamless steel pipes for oil and gas wells

Abstract

The application relates to the technical field of seamless steel pipe processing, and discloses a forming device for high-steel-grade seamless steel pipes for oil and gas wells, which comprises a box body, a conveying mechanism is arranged at the left end of the box body, a water cooling mechanism is arranged in the box body, and an air cooling mechanism is arranged in the box body; the conveying mechanism comprises a first fixing base, a first motor is fixedly connected to the front face of the first fixing base, a first rotating shaft is fixedly connected to the output end of the first motor, and a first conveying roller is fixedly connected to the outer wall of the first rotating shaft. When the first rotating shaft rotates, the synchronous wheel and the synchronous belt drive the crankshaft to rotate, then the connecting rod drives the piston to make reciprocating motion in the barrel, automatic suction and pressurized injection of cooling water are realized, the water cooling mechanism and the conveying mechanism share the same power source, an independent water pump power equipment does not need to be additionally arranged, and the equipment energy consumption and manufacturing cost are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of seamless steel pipe processing technology, specifically to a forming device for high-grade seamless steel pipes for oil and gas wells. Background Technology

[0002] In the production and forming process of high-grade seamless steel pipes for oil and gas wells, the water cooling process is a crucial step that determines the final microstructure and surface quality of the steel pipe. After hot rolling, high-grade seamless steel pipes are in a high-temperature state, and their internal microstructure is not yet stable, with significant residual stress. If cooling is not performed promptly and uniformly, it can easily lead to problems such as coarse grains, uneven microstructure, and substandard mechanical properties, severely affecting the pipe's strength, toughness, and corrosion resistance. Water cooling, as a highly efficient and rapid cooling method, can utilize the high specific heat capacity and latent heat of vaporization of water to quickly remove a large amount of heat from the steel pipe surface, allowing the pipe to cool from a high-temperature state to the target temperature in a short time. This refines the grains, homogenizes the microstructure, and eliminates residual stress, ensuring that the high-grade seamless steel pipes meet the requirements for use in complex conditions such as deep and ultra-deep wells.

[0003] Currently, the water cooling treatment of high-grade seamless steel pipes for oil and gas wells usually adopts a spray-type water cooling method. The specific operation process is as follows: the high-temperature seamless steel pipe is placed on the conveyor roller, which drives the steel pipe through the water cooling box at a uniform speed. Multiple spray heads are arranged above or on the side of the water cooling box. Cooling water is pressurized by a water pump and then transported to each spray head through pipeline. The water column or water mist sprayed from the spray head directly washes the outer wall of the steel pipe. The heat of the steel pipe is removed by the convection heat transfer and vaporization heat absorption of the water, so as to achieve rapid cooling of the steel pipe.

[0004] In practical use, existing water-cooling devices for high-grade seamless steel pipes used in oil and gas wells require a separate high-power water pump to provide high-pressure cooling water to the spray heads. The water pump and the conveying mechanism are driven by their own independent power sources, which not only increases the overall energy consumption and manufacturing cost of the equipment, but also makes it impossible to achieve synchronous linkage between the water cooling flow rate and the steel pipe conveying speed. When the conveying speed changes, the water cooling intensity cannot be automatically matched and adjusted accordingly, which can easily lead to over- or under-cooling of the steel pipe, affecting the forming quality of the high-grade seamless steel pipe. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a forming device for high-grade seamless steel pipes for oil and gas wells. It aims to solve the problems of existing water-cooling devices requiring independent water pump power sources, high equipment energy consumption, and the inability to synchronize and match water cooling intensity with steel pipe conveying speed, resulting in unstable cooling and forming quality of high-grade seamless steel pipes.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a forming device for high-grade seamless steel pipes for oil and gas wells, comprising a box body, a conveying mechanism provided at the left end of the box body, a water cooling mechanism provided inside the box body, and an air cooling mechanism provided inside the box body; The conveying mechanism includes a first fixed base, a first motor is fixedly connected to the front of the first fixed base, a first rotating shaft is fixedly connected to the output end of the first motor, a first conveying roller is fixedly connected to the outer wall of the first rotating shaft, and a pressure roller is provided directly above the first conveying roller. The water-cooling mechanism includes a crankshaft, a connecting rod rotatably connected to the outer wall of the crankshaft via a bearing, a piston hinged to the lower end of the connecting rod, a barrel fixedly connected to the inner wall of the housing, the piston slidably connected to the inner wall of the barrel, a first synchronous pulley fixedly connected to the rear end of the crankshaft, a first synchronous belt drivingly connected to the outer wall of the first synchronous pulley, a second synchronous pulley fixedly connected to the rear end of the first rotating shaft, the left end of the first synchronous belt drivingly connected to the outer wall of the second synchronous pulley, a delivery pipe connected to the barrel, a water plate connected to the other end of the delivery pipe, and a nozzle fixedly connected to the front of the water plate.

[0007] Preferably, a hydraulic cylinder is fixedly connected to the top of the first fixed seat, and a roller frame is fixedly connected to the telescopic end of the hydraulic cylinder. The pressure roller is rotatably connected to the inner wall of the roller frame through a bearing.

[0008] Preferably, the first fixing base is fixedly connected to the left end of the box, the top of the box is fixedly connected to the shell, and a drain outlet is provided at the lower right corner of the front of the box.

[0009] Preferably, the lower end of the outer wall of the barrel is provided with a water inlet, and a one-way water inlet valve is fixedly connected to the water inlet. The outer wall of the barrel is provided with a water outlet, and a one-way water outlet valve is fixedly connected to the water outlet. The left end of the conveying pipe is fixedly connected to the one-way water outlet valve.

[0010] Preferably, a crossbar is fixedly connected to the inner wall of the tank, and the water plate is fixedly connected to the upper surface of the crossbar.

[0011] Preferably, a second fixed base is fixedly connected to the right end of the housing, a second motor is fixedly connected to the front of the second fixed base, a fourth rotating shaft is fixedly connected to the output end of the second motor, and a second conveying roller is fixedly connected to the outer wall of the fourth rotating shaft.

[0012] Preferably, the air-cooling mechanism includes a fixed frame, and a second rotating shaft is rotatably connected to the inner wall of the fixed frame via a bearing. A fan blade is fixedly connected to the left end of the second rotating shaft, and a first bevel gear is fixedly connected to the right end of the second rotating shaft.

[0013] Preferably, the inner wall of the housing is rotatably connected to a third rotating shaft via a bearing, and the outer wall of the third rotating shaft is fixedly connected to a second bevel gear, wherein the outer wall of the first bevel gear meshes with the outer wall of the second bevel gear.

[0014] Preferably, a driven wheel is fixedly connected to the rear end of the third rotating shaft, and a second synchronous belt is driven to the outer wall of the driven wheel.

[0015] Preferably, the rear end of the fourth rotating shaft is fixedly connected to a drive wheel, and the right end of the second synchronous belt is driven to the outer wall of the drive wheel.

[0016] This invention provides a forming apparatus for high-grade seamless steel pipes used in oil and gas wells. It has the following beneficial effects: 1. This invention utilizes the rotation of the first rotating shaft to drive the crankshaft through the synchronous pulley and synchronous belt, which in turn drives the piston to reciprocate within the barrel via the connecting rod. This achieves automatic suction and pressurized spraying of cooling water, allowing the water cooling mechanism and the conveying mechanism to share the same power source. This eliminates the need for a separate water pump power unit, effectively reducing equipment energy consumption and manufacturing costs. Simultaneously, the water cooling pumping frequency is directly linked to the steel pipe conveying speed. The faster the conveying speed, the higher the piston reciprocating frequency and the larger the cooling water spray flow rate. This allows the water cooling intensity to automatically match and adjust with the steel pipe conveying speed, ensuring the consistency and stability of the steel pipe cooling effect under different conveying speeds, and improving the cooling and forming quality of high-grade seamless steel pipes.

[0017] 2. This invention utilizes the rotation of the fourth rotating shaft to drive the third rotating shaft through the driving wheel, the second synchronous belt, and the driven wheel. The airflow is then generated by the rotation of the second rotating shaft and the fan blades via the bevel gear transmission pair. This allows the air-cooling mechanism and the right-end conveying mechanism to share the same power source, further reducing the overall energy consumption of the equipment. The air-cooling mechanism can force-cool seamless steel pipes in water cooling, which can not only accelerate the cooling speed of the steel pipes, shorten the cooling time, and improve production efficiency, but also promptly blow away residual cooling water stains on the surface of the steel pipes, avoiding watermarks and local temperature differences on the surface of the steel pipes, and ensuring the surface quality and cooling uniformity of the steel pipes.

[0018] 3. This invention uses a hydraulic cylinder to drive the roller frame to move up and down, thereby adjusting the distance between the pressure roller and the first conveying roller. This allows the conveying mechanism to adaptably clamp and convey seamless steel pipes of different diameters, expanding the applicability of the device and meeting the forming and cooling requirements of various specifications of high-grade seamless steel pipes. At the same time, the clamping and conveying method of the upper and lower rollers can ensure the stability of the steel pipe during the conveying process, avoiding the steel pipe from shifting or jumping during water cooling and air cooling, thus improving the versatility and production adaptability of the device. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic diagram of the rear structure of the housing of the present invention; Figure 4 This is a schematic diagram of the conveying mechanism structure of the present invention; Figure 5 This is a schematic diagram of the water cooling mechanism of the present invention; Figure 6 This is a schematic diagram of the first rotating shaft structure of the present invention; Figure 7 This is a schematic diagram of the air-cooling mechanism of the present invention; Figure 8 This is a schematic diagram of the third rotating shaft structure of the present invention.

[0020] The components are as follows: 1. Box body; 2. Conveying mechanism; 201. First fixed seat; 202. First motor; 203. First rotating shaft; 204. First conveying roller; 205. Hydraulic cylinder; 206. Roller frame; 207. Pressure roller; 3. Water cooling mechanism; 301. Crankshaft; 302. First synchronous pulley; 303. First synchronous belt; 304. Second synchronous pulley; 305. Barrel body; 306. One-way water outlet valve; 307. Conveying pipe; 308. Water plate; 309. Connecting rod. 310. Piston; 311. Nozzle; 312. One-way water inlet valve; 4. Air cooling mechanism; 401. Fixing frame; 402. Second rotating shaft; 403. Fan blade; 404. First bevel gear; 405. Third rotating shaft; 406. Second bevel gear; 407. Driven wheel; 408. Second synchronous belt; 409. Driving wheel; 5. Second fixing seat; 6. Second motor; 7. Fourth rotating shaft; 8. Second conveyor roller; 9. Housing; 10. Drain outlet; 11. Cross frame. Detailed Implementation

[0021] The technical solutions in 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.

[0022] Example: Please see the appendix Figure 1 -Appendix Figure 3 This invention provides a forming device for high-grade seamless steel pipes for oil and gas wells, including a box body 1. A conveying mechanism 2 is provided at the left end of the box body 1 for conveying the seamless steel pipe. A water cooling mechanism 3 is provided inside the box body 1 for water cooling the seamless steel pipe. An air cooling mechanism 4 is provided inside the box body 1 for air cooling the seamless steel pipe during the water cooling process. Please see the appendix Figure 4 -Appendix Figure 6 The conveying mechanism 2 includes a first fixed base 201, a first motor 202 fixedly connected to the front of the first fixed base 201, a first rotating shaft 203 fixedly connected to the output end of the first motor 202, a first conveying roller 204 fixedly connected to the outer wall of the first rotating shaft 203, and a pressure roller 207 arranged directly above the first conveying roller 204. By starting the first motor 202, the first rotating shaft 203 is driven to rotate, so that the first conveying roller 204 cooperates with the pressure roller 207 to convey the seamless steel pipe. The water-cooling mechanism 3 includes a crankshaft 301. A connecting rod 309 is rotatably connected to the outer wall of the crankshaft 301 via bearings. A piston 310 is hinged to the lower end of the connecting rod 309. A barrel 305 is fixedly connected to the inner wall of the housing 1. The piston 310 is slidably connected to the inner wall of the barrel 305. A first synchronous pulley 302 is fixedly connected to the rear end of the crankshaft 301. A first synchronous belt 303 is drivenly connected to the outer wall of the first synchronous pulley 302. A second synchronous pulley 304 is fixedly connected to the rear end of the first rotating shaft 203. The left end of the first synchronous belt 303 is drivenly connected to the second synchronous pulley 304. The outer wall of 04, the barrel 305 is connected to the conveying pipe 307, the other end of the conveying pipe 307 is connected to the water plate 308, the front of the water plate 308 is fixedly connected to the nozzle 311. During the rotation of the first rotating shaft 203, the crankshaft 301 can be driven to rotate through the synchronous wheel and the first synchronous belt 303, thereby driving the connecting rod 309 to drive the piston 310 to reciprocate in the barrel 305, so that the barrel 305 draws in the cooling water inside the box 1, and delivers it to the water plate 308 through the conveying pipe 307, and sprays it onto the seamless steel pipe through the nozzle 311.

[0023] A hydraulic cylinder 205 is fixedly connected to the top of the first fixed seat 201. A roller frame 206 is fixedly connected to the telescopic end of the hydraulic cylinder 205. The pressure roller 207 is rotatably connected to the inner wall of the roller frame 206 through a bearing. By starting the hydraulic cylinder 205, the position and height of the roller frame 206 can be adjusted, so that the pressure roller 207 can press down on the outer wall of the seamless steel pipe, which is convenient for conveying steel pipes of different diameters.

[0024] The first fixed base 201 is fixedly connected to the left end of the box body 1. The top of the box body 1 is fixedly connected to the shell 9. A drain outlet 10 is opened at the lower right corner of the front of the box body 1. Wastewater inside the box body 1 can be discharged through the drain outlet 10.

[0025] A water inlet is provided at the lower end of the outer wall of the barrel 305, and a one-way water inlet valve 312 is fixedly connected to the water inlet. A water outlet is provided on the outer wall of the barrel 305, and a one-way water outlet valve 306 is fixedly connected to the water outlet. The left end of the conveying pipe 307 is fixedly connected to the one-way water outlet valve 306. With the setting of the one-way water inlet valve 312, when the piston 310 moves upward, the cooling water enters the interior of the barrel 305 through the water inlet via the one-way water inlet valve 312. When the piston 310 moves downward, the cooling water in the barrel 305 can enter the conveying pipe 307 through the water outlet via the one-way water outlet valve 306.

[0026] A crossbeam 11 is fixedly connected to the inner wall of the housing 1, and a water plate 308 is fixedly connected to the upper surface of the crossbeam 11. The crossbeam 11 can support and fix the water plate 308.

[0027] Please see the appendix Figure 7 -Appendix Figure 8 The right end of the housing 1 is fixedly connected to a second fixed seat 5, the front of the second fixed seat 5 is fixedly connected to a second motor 6, the output end of the second motor 6 is fixedly connected to a fourth rotating shaft 7, and the outer wall of the fourth rotating shaft 7 is fixedly connected to a second conveying roller 8. By starting the second motor 6, the fourth rotating shaft 7 can be driven to rotate, thereby the second conveying roller 8 conveys the seamless steel pipe.

[0028] The air-cooling mechanism 4 includes a fixed frame 401. The inner wall of the fixed frame 401 is rotatably connected to a second rotating shaft 402 via bearings. A fan blade 403 is fixedly connected to the left end of the second rotating shaft 402, and a first bevel gear 404 is fixedly connected to the right end of the second rotating shaft 402. The inner wall of the housing 1 is rotatably connected to a third rotating shaft 405 via bearings. A second bevel gear 406 is fixedly connected to the outer wall of the third rotating shaft 405. The outer walls of the first bevel gear 404 and the second bevel gear 406 mesh. When the third rotating shaft 405 rotates, the first bevel gear 404 can be driven to rotate by the second bevel gear 406, thereby driving the second rotating shaft 402 to rotate, so that the fan blade 403 can air-cool the seamless pipe.

[0029] The rear end of the third rotating shaft 405 is fixedly connected to a driven wheel 407, and the outer wall of the driven wheel 407 is driven by a second synchronous belt 408. The rear end of the fourth rotating shaft 7 is fixedly connected to a driving wheel 409, and the right end of the second synchronous belt 408 is driven by a driving connection to the outer wall of the driving wheel 409. The second motor 6 is started to drive the fourth rotating shaft 7 to rotate. The fourth rotating shaft 7 drives the third rotating shaft 405 to rotate through the driving wheel 409, the second synchronous belt 408 and the driven wheel 407.

[0030] Working principle: Before use, an appropriate amount of cooling water needs to be injected into the inside of the housing 1. During use, the seamless steel pipe in a high-temperature state is fed into the housing 1 from the left end. At the same time, the first motor 202 and the second motor 6 are started. The first motor 202 drives the first rotating shaft 203 to rotate, so that the first conveying roller 204 cooperates with the pressure roller 207 to clamp and convey the seamless steel pipe. The hydraulic cylinder 205 can be started to adjust the position and height of the roller frame 206, so that the pressure roller 207 can press down on the outer wall of the seamless steel pipe, which can adapt to the conveying needs of steel pipes with different diameters.

[0031] During the rotation of the first rotating shaft 203, the first synchronous pulley 302 is driven to rotate via the second synchronous pulley 304 and the first synchronous belt 303, which in turn drives the crankshaft 301 to rotate. When the crankshaft 301 rotates, it drives the piston 310 to reciprocate within the barrel 305 via the connecting rod 309. When the piston 310 moves upward, cooling water enters the interior of the barrel 305 through the inlet via the one-way inlet valve 312. When the piston 310 moves downward, the cooling water in the barrel 305 is forced into the delivery pipe 307 through the outlet via the one-way outlet valve 306. The cooling water is then delivered to the water plate 308 via the delivery pipe 307 and then evenly sprayed onto the outer wall of the seamless steel pipe through the nozzle 311 to achieve water cooling.

[0032] Simultaneously, the second motor 6 drives the fourth rotating shaft 7 to rotate, thereby allowing the second conveying roller 8 to continue conveying the seamless steel pipe. While the fourth rotating shaft 7 rotates, it drives the third rotating shaft 405 to rotate via the driving wheel 409, the second synchronous belt 408, and the driven wheel 407. The rotation of the third rotating shaft 405 drives the first bevel gear 404 to rotate via the second bevel gear 406, which in turn drives the second rotating shaft 402 to rotate. This causes the fan blades 403 to generate airflow that blows onto the surface of the seamless steel pipe, further accelerating the cooling process and removing residual water stains from the pipe surface. Finally, the cooled and formed seamless steel pipe is output from the right end of the housing 1, completing the entire forming and cooling process.

[0033] 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 forming device for high-grade seamless steel pipes for oil and gas wells, comprising a housing (1), characterized in that, The left end of the box (1) is provided with a conveying mechanism (2), the inside of the box (1) is provided with a water cooling mechanism (3), and the inside of the box (1) is provided with an air cooling mechanism (4). The conveying mechanism (2) includes a first fixed base (201), a first motor (202) is fixedly connected to the front of the first fixed base (201), a first rotating shaft (203) is fixedly connected to the output end of the first motor (202), a first conveying roller (204) is fixedly connected to the outer wall of the first rotating shaft (203), and a pressure roller (207) is provided directly above the first conveying roller (204). The water cooling mechanism (3) includes a crankshaft (301), the outer wall of the crankshaft (301) is rotatably connected to a connecting rod (309) via a bearing, the lower end of the connecting rod (309) is hinged to a piston (310), the inner wall of the housing (1) is fixedly connected to a barrel (305), the piston (310) is slidably connected to the inner wall of the barrel (305), the rear end of the crankshaft (301) is fixedly connected to a first synchronous pulley (302), the outer wall of the first synchronous pulley (302) is drivenly connected to a first synchronous belt (303), the rear end of the first rotating shaft (203) is fixedly connected to a second synchronous pulley (304), the left end of the first synchronous belt (303) is drivenly connected to the outer wall of the second synchronous pulley (304), the barrel (305) is connected to a conveying pipe (307), the other end of the conveying pipe (307) is connected to a water plate (308), and the front of the water plate (308) is fixedly connected to a nozzle (311).

2. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 1, characterized in that, A hydraulic cylinder (205) is fixedly connected to the top of the first fixed seat (201), and a roller frame (206) is fixedly connected to the telescopic end of the hydraulic cylinder (205). The pressure roller (207) is rotatably connected to the inner wall of the roller frame (206) through a bearing.

3. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 1, characterized in that, The first fixing seat (201) is fixedly connected to the left end of the box (1), the top of the box (1) is fixedly connected to the shell (9), and a drain outlet (10) is opened at the lower right corner of the front of the box (1).

4. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 1, characterized in that, The lower end of the outer wall of the barrel (305) is provided with a water inlet, and a one-way water inlet valve (312) is fixedly connected to the water inlet. The outer wall of the barrel (305) is provided with a water outlet, and a one-way water outlet valve (306) is fixedly connected to the water outlet. The left end of the conveying pipe (307) is fixedly connected to the one-way water outlet valve (306).

5. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 1, characterized in that, The inner wall of the box (1) is fixedly connected to a crossbeam (11), and the water plate (308) is fixedly connected to the upper surface of the crossbeam (11).

6. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 1, characterized in that, The right end of the housing (1) is fixedly connected to a second fixed seat (5), the front of the second fixed seat (5) is fixedly connected to a second motor (6), the output end of the second motor (6) is fixedly connected to a fourth rotating shaft (7), and the outer wall of the fourth rotating shaft (7) is fixedly connected to a second conveying roller (8).

7. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 6, characterized in that, The air-cooling mechanism (4) includes a fixed frame (401), and the inner wall of the fixed frame (401) is rotatably connected to a second rotating shaft (402) via a bearing. A fan blade (403) is fixedly connected to the left end of the second rotating shaft (402), and a first bevel gear (404) is fixedly connected to the right end of the second rotating shaft (402).

8. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 7, characterized in that, The inner wall of the housing (1) is rotatably connected to a third rotating shaft (405) via a bearing. The outer wall of the third rotating shaft (405) is fixedly connected to a second bevel gear (406). The outer wall of the first bevel gear (404) meshes with the outer wall of the second bevel gear (406).

9. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 8, characterized in that, The rear end of the third rotating shaft (405) is fixedly connected to a driven wheel (407), and the outer wall of the driven wheel (407) is connected to a second synchronous belt (408).

10. The forming apparatus for high-grade seamless steel pipes for oil and gas wells according to claim 9, characterized in that, The rear end of the fourth rotating shaft (7) is fixedly connected to the drive wheel (409), and the right end of the second synchronous belt (408) is driven to the outer wall of the drive wheel (409).

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