A flow-disturbing, long-term anti-corrosion and anti-scaling device for underground and surface pipelines

Abstract

The present invention relates to the technical field of oil well pipeline protection, and specifically to a flow-turbulating, long-term anti-corrosion and anti-scaling device for underground and ground pipelines, comprising a support pipe installed at the lower part of the oil well pipeline, the oil outlet end of the oil well pipeline being connected to the oil pump, and also comprising: a pressure pipe, the pressure pipe being in the shape of an hourglass as a whole, the middle part being cylindrical and provided with a first through hole, the first through holes being provided in a plurality of shapes and being evenly distributed in a circular shape in the middle part of the pressure pipe, the outer walls of the two end parts being fixed to the inner wall of the support pipe, and under the action of a metering mechanism and a dislocation mechanism, as the amount of oil production increases, the contact area between the oil layer output fluid and the compressed corrosion and scale inhibition blocks increases synchronously, that is, when the oil well pipeline is in a good state in the early stage of production, only a small amount of compressed corrosion and scale inhibition blocks will be consumed to protect the oil well pipeline, and when the oil well pipeline is in a poor state in the later stage of production, a large amount of compressed corrosion and scale inhibition blocks will be consumed to protect the oil well pipeline, and the compressed corrosion and scale inhibition blocks will be efficiently utilized.

Description

Technical Field

[0001] The invention relates to the technical field of oil well pipeline protection, in particular to a flow-turbulating long-term anti-corrosion and anti-scaling device applied to underground and ground pipelines. Background Art

[0002] Crude oil contains certain corrosive substances, such as sulfides, cyclohexane acid, alkali metal salts, etc. These substances will corrode the inner wall of the pipeline under the influence of factors such as temperature, pressure, flow rate and alternating stress. At the same time, the dissolved salts contained in the oil well water may precipitate and adhere to the inner wall of the pipeline to form a scale layer when the temperature, pressure and other conditions change. This is an unavoidable factor in the oil extraction process. Pipeline corrosion and scaling will shorten its service life. How to extend the service life of the pipeline is a goal that industry insiders have been pursuing.

[0003] There are three main ways to protect pipelines:

[0004] 1. Choose high-strength and corrosion-resistant pipe materials, such as nickel-based alloys, titanium alloys, etc. However, the cost of pipes made of such materials is high, especially for some oil fields that are several thousand meters deep and require multiple pipelines for transportation at the same time, which will be a great burden on the production costs of enterprises;

[0005] 2. Cathodic protection technology: This technology is mainly applicable to specific metal corrosion environments, and has large initial investment and obvious limitations;

[0006] 3. Inject corrosion and scale inhibitors into the oil well to form a protective layer on the inner wall of the pipeline, thereby achieving the purpose of protecting the inner wall of the pipeline.

[0007] Among them, method 3 has a wide range of applications and low cost, and is a frequently used method in existing oil field production. However, this method is generally manually operated, with high labor intensity and high operating requirements. For this reason, we propose a long-term anti-corrosion and anti-scaling device for underground and ground pipelines. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a flow disturbance long-term anti-corrosion and anti-scaling device for underground and surface pipelines, comprising a support pipe installed at the lower part of the oil well pipeline, the oil outlet end of the oil well pipeline is connected to the oil pump, and also includes:

[0009] A pressure tube, the pressure tube is in an hourglass shape as a whole, the middle part is cylindrical and has a first through hole, there are a plurality of first through holes, and the first through holes are evenly distributed in a ring shape in the middle of the pressure tube, and the outer walls of the two end parts are fixed to the inner wall of the support tube;

[0010] A sleeve, wherein the sleeve is sleeved at the middle position of the pressurized tube and is provided with a second through hole, wherein the second through holes are provided in a plurality and are evenly distributed in an annular shape and are staggered with the first through holes, wherein the sleeve is rotatably connected to the pressurized tube;

[0011] A sealing cover, which is sleeved on the sleeve, is cylindrical, and is fixedly connected to the sleeve;

[0012] A compressed corrosion and scale inhibition block, which is arranged in the space between the sealing cover and the sleeve and is cylindrical in shape as a whole;

[0013] A pressurizing mechanism, which is installed inside the pressurizing pipe, and which increases the flow rate of the oil layer produced liquid in the lower section of the pressurizing pipe, realizes the stable flow of the oil layer produced liquid in the middle section of the pressurizing pipe, and slows down the flow rate of the oil layer produced liquid in the upper section of the pressurizing pipe;

[0014] A metering mechanism, wherein the metering mechanism is mounted on the pressurized pipe;

[0015] The dislocation mechanism is installed on the pressure pipe and connected to the sleeve. The metering mechanism counts the flow rate of the oil layer production fluid of the support pipe, and as the production volume of the oil layer production fluid increases, the dislocation mechanism is driven to gradually overlap the first through hole and the second through hole.

[0016] In some embodiments, the pressurizing mechanism includes support frames relatively installed at both ends of the pressurizing tube, an auger rod is installed in the pressurizing tube, both ends of the auger rod are respectively supported by the support frames, the auger rod and the support frame are rotatably connected, the auger blades on the auger rod are in contact with the inner wall of the pressurizing tube, and a turbine is sleeved on the auger rod.

[0017] In some embodiments, the metering mechanism includes a first pipe connecting the two ends of the pressurized pipe, the first pipe is located in the space between the support pipe and the pressurized pipe, a power supply is installed on the pressurized pipe, a flow control valve is connected to the first pipe, the flow control valve is connected to the power supply through a wire, the flow control valve is electrically connected to the monitoring and control system of the oil well, a Roots flowmeter is connected to the first pipe, and the Roots flowmeter is located above the flow control valve.

[0018] In some embodiments, the misalignment mechanism includes a first spur gear rotatably connected to the Roots flowmeter, the first pipe is sleeved with a fixed seat, a gear reduction group is installed on the fixed seat, a second spur gear is sleeved on the input shaft of the gear reduction group, the second spur gear and the first spur gear are meshed with each other, a disc is fixed on the output shaft of the gear reduction group, and also includes a first cylindrical rod fixed on one side of the sleeve, there are a plurality of the first cylindrical rods in a circular array, a second cylindrical rod is fixed on the disc, there are a plurality of the second cylindrical rods in a circular array, and the second cylindrical rod and the first cylindrical rod are in a gear meshing state.

[0019] In some embodiments, the space between the pressurized tube and the support tube is filled with sulfur hexafluoride gas.

[0020] In some embodiments, the surfaces of the support tube, pressure tube, support frame, auger rod, turbine, sleeve, and sealing cover are all plated with chromium of not less than 0.2 mm.

[0021] In some embodiments, conical heads are fixed at both ends of the auger rod.

[0022] In some embodiments, the support tube, pressure tube, support frame, auger rod, turbine, sleeve, sealing cover, and conical head are all made of titanium alloy.

[0023] The present invention has at least the following beneficial effects:

[0024] 1. Under the action of the metering mechanism and the dislocation mechanism, as the amount of oil production increases, the contact area between the oil layer output fluid and the compressed corrosion and scale inhibition blocks increases synchronously, that is, when the oil well pipeline is in good condition in the early stage of production, only a small amount of compressed corrosion and scale inhibition blocks will be consumed to protect the oil well pipeline. When the oil well pipeline is in poor condition in the later stage of production, a large amount of compressed corrosion and scale inhibition blocks will be consumed to protect the oil well pipeline, and the compressed corrosion and scale inhibition blocks are used efficiently;

[0025] 2. After the device is installed once, it can be used for a long time, which greatly reduces the labor intensity of workers;

[0026] 3. Compared with the traditional method of selecting high-strength and corrosion-resistant oil well pipes, this device has lower costs. Compared with cathodic protection technology, it has low costs and a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the installation of the device of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the cross section of the sealing cover and the structure of the dislocation mechanism of the present invention;

[0031] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at A in the middle;

[0032] Figure 6 It is a schematic diagram of the internal decomposition structure of the present invention.

[0033] In the figure: 1. support tube; 2. pressurizing tube; 21. first through hole; 3. sleeve; 31. second through hole; 4. sealing cover; 5. compressed corrosion and scale inhibition block; 6. pressurizing mechanism; 61. support frame; 62. auger rod; 621. conical head; 63. turbine; 7. metering mechanism; 71. first pipeline; 72. power supply; 73. flow control valve; 74. Roots flowmeter; 8. offset mechanism; 81. first spur gear; 82. fixed seat; 83. gear reduction group; 84. second spur gear; 85. disc; 86. first cylindrical rod; 87. second cylindrical rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1-6 The present invention provides a technical solution: a flow-turbulating long-term anti-corrosion and anti-scaling device for underground and surface pipelines, comprising a support pipe 1 installed at the lower part of an oil well pipeline, the oil outlet end of the oil well pipeline being connected to an oil pump, and further comprising:

[0037] The pressure tube 2 is hourglass-shaped as a whole, and the middle part is cylindrical and has a first through hole 21. There are a plurality of first through holes 21, which are evenly distributed in the middle of the pressure tube 2 in an annular shape, and the outer walls of the two end parts are fixed to the inner wall of the support tube 1;

[0038] The sleeve 3 is sleeved at the middle position of the pressurized tube 2 and is provided with a second through hole 31. The second through holes 31 are provided in a plurality and are evenly distributed in an annular shape and are staggered with the first through hole 21. The sleeve 3 is rotatably connected to the pressurized tube 2.

[0039] The sealing cover 4 is sleeved on the sleeve 3, is cylindrical, and is fixedly connected to the sleeve 3;

[0040] A compressed corrosion and scale inhibition block 5 is arranged in the space between the sealing cover 4 and the sleeve 3, and is cylindrical in shape as a whole. The compressed corrosion and scale inhibition block 5 is an existing product;

[0041] The pressurizing mechanism 6 is installed inside the pressurizing pipe 2. The pressurizing mechanism 6 increases the flow rate of the oil layer produced liquid in the lower section of the pressurizing pipe 2, realizes the stable flow of the oil layer produced liquid in the middle section of the pressurizing pipe 2, and slows down the flow rate of the oil layer produced liquid in the upper section of the pressurizing pipe 2;

[0042] A metering mechanism 7, which is mounted on the pressurized pipe 2;

[0043] The dislocation mechanism 8 is installed on the pressure pipe 2 and connected to the sleeve 3. The metering mechanism 7 counts the partial flow of the oil layer production fluid of the support pipe 1, and as the production volume of the oil layer production fluid increases, the dislocation mechanism 8 is driven to gradually overlap the first through hole 21 and the second through hole 31.

[0044] The pressurizing mechanism 6 includes a support frame 61 relatively installed at both ends of the pressurizing tube 2, an auger rod 62 is installed in the pressurizing tube 2, both ends of the auger rod 62 are respectively supported by the support frame 61, the auger rod 62 and the support frame 61 are rotatably connected, the auger blades on the auger rod 62 are in contact with the inner wall of the pressurizing tube 2, a turbine 63 is sleeved on the auger rod 62, and the auger rod 62 and the turbine 63 are fixedly connected.

[0045] The metering mechanism 7 includes a first pipe 71 connecting the two ends of the pressurized pipe 2. The first pipe 71 is located in the space between the support pipe 1 and the pressurized pipe 2. A power supply 72 is installed on the pressurized pipe 2. A flow control valve 73 is connected to the first pipe 71. The flow control valve 73 is connected to the power supply 72 through a wire. The flow control valve 73 is electrically connected to the monitoring and control system of the oil well. A Roots flowmeter 74 is connected to the first pipe 71. The Roots flowmeter 74 is located above the flow control valve 73.

[0046] The dislocation mechanism 8 includes a first spur gear 81 mounted on the Roots flowmeter 74, the first spur gear 81 is rotatably connected to the Roots flowmeter 74, specifically, it is sleeved on the rotating shaft of the gear of the Roots flowmeter 74, the gear in the Roots flowmeter 74 and the rotating shaft of the fixed gear are all parts of the existing Roots flowmeter 74, the first pipe 71 is sleeved with a fixed seat 82, the fixed seat 82 is mounted with a gear reduction group 83, the input shaft of the gear reduction group 83 is sleeved with a second spur gear 84, the second spur gear 84 and the first spur gear 81 are meshed with each other, a disc 85 is fixed on the output shaft of the gear reduction group 83, and also includes a first cylindrical rod 86 fixed on one side of the sleeve 3, there are a plurality of first cylindrical rods 86, and they are in a circular array, a second cylindrical rod 87 is fixed on the disc 85, there are a plurality of second cylindrical rods 87, and they are in a circular array, and the second cylindrical rod 87 and the first cylindrical rod 86 are in a gear meshing state.

[0047] The space between the pressurized tube 2 and the support tube 1 is filled with sulfur hexafluoride gas. As an insulating medium, sulfur hexafluoride gas not only has good chemical stability, but also can play an arc extinguishing role when the equipment fails due to various conditions (such as short circuit of the electronic part, etc.), thereby ensuring the safety of the device.

[0048] The surfaces of the support tube 1, the pressure tube 2, the support frame 61, the auger rod 62, the turbine 63, the sleeve 3 and the sealing cover 4 are all plated with chromium of not less than 0.2 mm.

[0049] The chromium layer can effectively isolate the oil from direct contact with the device part, preventing the corrosive substances in the oil from corroding the device. The surface of the chromium layer is smooth and burr-free, which reduces fluid resistance and improves the oil transportation efficiency. At the same time, it has high hardness and can effectively resist the wear and scratches caused during the oil transportation process.

[0050] Working principle: During the exploitation of the oil well, with the operation of the oil pump, the oil layer produced fluid is extracted upward from the bottom end of the pressure pipe 2. As the oil layer produced fluid rises, the turbine 63 drives the auger rod 62 to rotate. Since the auger rod 62 and the pressure pipe 2 are both hourglass-shaped as a whole, and the middle part is cylindrical, when the oil layer produced fluid passes through the lower part of the pressure pipe 2, the opening of the pressure pipe 2 gradually decreases, and the flow rate of the oil layer produced fluid increases. The auger blades of the auger rod 62 and the corresponding part of the pressure pipe 2 are conical, which also has a positive effect on the flow rate.

[0051] When the oil layer produced liquid is in the middle part of the pressurized pipe 2, it is accelerated by the lower end part. At this time, the impact force of the oil layer produced liquid is relatively large, and it can fully contact with the compressed corrosion and scale inhibition block 5 and dissolve the compressed corrosion and scale inhibition block 5. At this time, the oil layer produced liquid is mixed with effective ions after the compressed corrosion and scale inhibition block 5 is dissolved;

[0052] When the effective ions dissolved in the compressed corrosion and scale inhibition block 5 enter the upper part of the pressure pipe 2 together with the oil layer production fluid, the opening of the pressure pipe 2 gradually increases, and the flow rate of the oil layer production fluid decreases. Under the action of the upper blades of the auger rod 62, the effective ions dissolved in the compressed corrosion and scale inhibition block 5 are fully mixed with the oil layer production fluid so that they can be evenly applied through the oil well pipeline, and the anti-corrosion and anti-scale effect is better.

[0053] It should be noted that before the installation of oil well pipelines, some low-cost means are often used to treat the pipelines, such as coating anti-corrosion, hot-dip galvanizing, etc., to extend the service life of the pipelines. In the early stage of oil well exploitation, since the oil well pipelines used for oil production have not been used for a long time, the protective effect of the inner surface layer still exists. If a large amount of corrosion and scale inhibitors are still used for protection at this time, it will undoubtedly cause a waste of resources. The metering mechanism 7 and the dislocation mechanism 8 proposed by the device solve this problem;

[0054] After the oil layer produced fluid enters the pressure pipe 2, part of it will enter the flow control valve 73 through the first pipeline 71, and then be pumped out from the other end of the pressure pipe 2 through the Roots flowmeter 74. In this process, the flow control valve 73 controls the flow of the oil layer produced fluid in the first pipeline 71. When the oil layer produced fluid passes through the Roots flowmeter 74, the shaft of the gear on the Roots flowmeter 74 will rotate, and use this as a driving force to drive the first spur gear 81, the second spur gear 84, and the gear reduction group 83. The disc 85 is driven to rotate. The rotation of the second cylindrical rod 87 on the disc 85 drives the sleeve 3 to rotate through the first cylindrical rod 86. The rotation of the sleeve 3 increases the overlap area of ​​the second through hole 31 and the first through hole 21, and the contact area between the oil layer production fluid and the compressed corrosion and scale inhibition block 5 increases, thereby increasing the dissolution rate of the compressed corrosion and scale inhibition block 5. The gear reduction group 83 has the effect of reducing speed and increasing torque, and the force of rotating the shaft of the gear on the Roots flowmeter 74 can finally drive the sleeve 3 to rotate.

[0055] In the early stage of oilfield exploitation, when the inner wall protection of the pipeline is still in place, the usage of the compressed corrosion and scale inhibition block 5 is relatively low. As the progress of oilfield exploitation increases, the usage of the compressed corrosion and scale inhibition block 5 is gradually increased.

[0056] In the early stage of oil well exploitation, the staff controls the flow control valve 73 according to the data of the daily output and exploitation cycle of a single oil well. For the convenience of understanding, an example is given: assuming that the total oil content of the oil field is 10 million tons, the exploitation requirement of a single oil well is 1 million tons, and it is expected to be completed in 100 days, that is, the daily production of a single oil well is 1 ton. Every day, the oil layer output fluid passes through the flow control valve 73 and the Roots flowmeter 74, and the rotation of the shaft of the gear on the Roots flowmeter 74 is used as the driving force to drive the sleeve 3 to rotate. The total rotation amplitude per day is one seventieth to one eightieth of the total area of ​​a single first through hole 21, that is, a 100-day exploitation cycle. If the daily standard is met and the production volume is 1 ton, the contact area between the oil layer production fluid and the compressed corrosion and scale inhibition block 5 will increase by one-seventieth to one-eightieth every day, and the contact area is proportional to the actual oil field production volume, until the oil field production progress reaches 70%-80%, the first through hole 21 and the second through hole 31 completely overlap, at this time the compressed corrosion and scale inhibition block 5 and the oil layer production fluid The contact area is the largest, the protection effect on the pipeline is the best, and the compressed corrosion and scale inhibition block 5 is efficiently utilized. The above effect can be achieved by changing the valve port size of the flow control valve 73, and the valve port size of the flow control valve 73 can be precisely controlled according to calculations and in conjunction with finite element analysis software.

[0057] Embodiment 2:

[0058] Based on Example 1, this application further optimizes this solution:

[0059] A conical head 621 is fixed to one end of the auger rod 62 away from the oil pump. The conical head 621 guides the oil layer produced fluid to reduce the impact force directly caused by the oil layer produced fluid to the end of the auger rod 62.

[0060] The support pipe 1, the pressure pipe 2, the support frame 61, the auger rod 62, the turbine 63, the sleeve 3, the sealing cover 4 and the conical head 621 are all made of titanium alloy. Even if the surface layer of the titanium alloy is damaged, it can still transmit the oil layer production fluid relatively stably.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flow-disturbing, long-term anti-corrosion and anti-scaling device for underground and surface pipelines, comprising a support pipe (1) installed at the lower part of an oil well pipeline, wherein the oil outlet end of the oil well pipeline is connected to an oil pump, and characterized in that: Also includes: A pressure tube (2), the pressure tube (2) being in an hourglass shape as a whole, the middle part being cylindrical and provided with a first through hole (21), the first through holes (21) being in a plurality and evenly distributed in a ring shape in the middle of the pressure tube (2), the outer walls of the two end parts being fixed to the inner wall of the support tube (1); A sleeve (3), the sleeve (3) being sleeved at a middle position of the pressurized tube (2) and having a second through hole (31), the second through holes (31) being provided in a plurality and evenly distributed in an annular shape and being staggered with the first through hole (21), wherein the sleeve (3) and the pressurized tube (2) are rotatably connected; A sealing cover (4), the sealing cover (4) is sleeved on the sleeve (3), is cylindrical in shape, and is fixedly connected to the sleeve (3); A compressed corrosion and scale inhibition block (5), wherein the compressed corrosion and scale inhibition block (5) is arranged in the space between the sealing cover (4) and the sleeve (3) and is cylindrical in shape as a whole; A pressurizing mechanism (6), the pressurizing mechanism (6) being installed inside the pressurizing pipe (2), the pressurizing mechanism (6) increasing the flow rate of the oil layer output fluid in the lower section of the pressurizing pipe (2), achieving a stable flow of the oil layer output fluid in the middle section of the pressurizing pipe (2), and slowing down the flow rate of the oil layer output fluid in the upper section of the pressurizing pipe (2); A metering mechanism (7), wherein the metering mechanism (7) is mounted on the pressurized pipe (2); A dislocation mechanism (8), the dislocation mechanism (8) being mounted on the pressure pipe (2) and connected to the sleeve (3), the metering mechanism (7) counting the flow rate of the oil layer output fluid portion of the support pipe (1), and driving the dislocation mechanism (8) to gradually overlap the first through hole (21) and the second through hole (31) as the production volume of the oil layer output fluid increases; The metering mechanism (7) comprises a first pipe (71) connecting the two ends of the pressurized pipe (2), the first pipe (71) being located in the space between the support pipe (1) and the pressurized pipe (2), a power source (72) being installed on the pressurized pipe (2), a flow control valve (73) being connected to the first pipe (71), the flow control valve (73) being connected to the power source (72) via a wire, the flow control valve (73) being electrically connected to a monitoring control system of the oil well, a Roots flow meter (74) being connected to the first pipe (71), the Roots flow meter (74) being located above the flow control valve (73); The dislocation mechanism (8) comprises a first spur gear (81) rotatably connected to a Roots flowmeter (74); a fixing seat (82) is sleeved on the first pipe (71); a gear reduction group (83) is mounted on the fixing seat (82); a second spur gear (84) is sleeved on the input shaft of the gear reduction group (83); the second spur gear (84) and the first spur gear (81) are meshed with each other; a disk (85) is fixed on the output shaft of the gear reduction group (83); and the mechanism further comprises a first cylindrical rod (86) fixed to one side of the sleeve (3); a plurality of the first cylindrical rods (86) are arranged in a circular array; a second cylindrical rod (87) is fixed on the disk (85); a plurality of the second cylindrical rods (87) are arranged in a circular array; and the second cylindrical rod (87) and the first cylindrical rod (86) are meshed with each other in a gear-meshing state.

2. The long-term anti-corrosion and anti-scaling device for underground and surface pipelines according to claim 1 is characterized by: The pressurizing mechanism (6) comprises a support frame (61) relatively mounted at two ends of the pressurizing tube (2), an auger rod (62) being mounted in the pressurizing tube (2), two ends of the auger rod (62) being respectively supported by the support frame (61), the auger rod (62) and the support frame (61) being rotatably connected, the auger blades on the auger rod (62) being in contact with the inner wall of the pressurizing tube (2), and a turbine (63) being sleeved on the auger rod (62).

3. The long-term anti-corrosion and anti-scaling device for underground and surface pipelines according to claim 2 is characterized by: The space between the pressure tube (2) and the support tube (1) is filled with sulfur hexafluoride gas.

4. The long-term anti-corrosion and anti-scaling device for underground and surface pipelines according to claim 3 is characterized by: The surfaces of the support tube (1), the pressure tube (2), the support frame (61), the auger rod (62), the turbine (63), the sleeve (3), and the sealing cover (4) are all plated with chromium of not less than 0.2 mm.

5. The long-term anti-corrosion and anti-scaling device for underground and surface pipelines according to claim 4 is characterized by: Conical heads (621) are fixed to both ends of the auger rod (62).

6. The long-term anti-corrosion and anti-scaling device for underground and surface pipelines according to claim 5 is characterized by: The support tube (1), the pressure tube (2), the support frame (61), the auger rod (62), the turbine (63), the sleeve (3), the sealing cover (4), and the conical head (621) are all made of titanium alloy.

Images