A technology for monitoring and preventing oilfield wastewater corrosion

Abstract

The present invention relates to the field of pipeline maintenance, and specifically to a process for monitoring and preventing oilfield sewage corrosion, including a pipeline, a pipe cleaner, a magnetic sensor, and a transmission medium for driving the pipe cleaner to move: the pipe cleaner is provided with a cleaning mechanism speed limiting component. The technical solution uses a pipe cleaner, an electromagnetic transmitting device, and a magnetic sensor to monitor whether corrosion occurs on the pipe wall, and then the cleaning mechanism is used to clean the pipe wall. During this process, the operator opens the second valve to allow part of the transmission medium to enter between the casing and the transmission pipeline. Once the speed of the pipe cleaner is too fast, the transmission volume at the output end of the transmission pipeline will decrease. At this time, the hydraulic pressure of the transmission medium between the casing and the transmission pipeline will increase, so that the movable block overcomes the first elastic member to move, and the transmission rod drives the abutment block to contact the inside of the pipeline, thereby realizing the speed reduction function of the pipe cleaner.

Description

Technical Field

[0001] The invention relates to the field of pipeline maintenance, and in particular to a process for monitoring and preventing oilfield sewage corrosion. Background Art

[0002] There are a large number of pipelines in the oilfield gathering and transportation system, and the corrosion conditions are different in different environments. The corrosion of pipelines brings great difficulties to the production and operation of oilfields. Pipeline corrosion and perforation can cause environmental pollution, explosion and other personal injuries and property losses. Therefore, it is particularly important to monitor the corrosion of pipelines and grasp the corrosion conditions in time, so as to control the management of pipelines and reduce safety hazards. Existing pipeline monitoring usually saturates the pipe wall of the pipeline, and then the gas, liquid or pipeline transmission medium pushes the pig to move to clean the inner wall of the pipeline. The pig will be connected to the electromagnetic launch device to form a magnetic circuit with the measured pipe wall. When there are no defects in the pipe wall, the magnetic lines are constrained within the pipe wall, and the magnetic flux is parallel to the material surface, and almost no magnetic lines pass through the surface; when there are defects in the pipe wall or the material organization state changes, the magnetic permeability will change. Since the magnetic lines in the pipe wall are saturated, the magnetic flux is distorted, and the magnetic lines at the defect are repelled and pass through the pipe wall to produce leakage magnetic. The leaked part of the magnetic sensor probe is used to collect the corrosion of the inner wall of the pipeline.

[0003] When the existing intelligent pipe cleaner performs internal inspection on the pipeline, the speed of the pipe cleaner needs to be limited to a lower range; otherwise, it is easy to cause inaccurate pipeline inspection and affect the moving speed of the pipe cleaner. The existing solution is to achieve real-time speed control by installing a closed-loop controlled discharge valve inside the pipe cleaner. The principle is to adjust the discharge area of ​​the discharge valve driven by the motor to change the front and rear pressure difference of the pipe cleaner, thereby controlling the speed of the pipe cleaner. However, once this method changes the input amount of gas, liquid or pipeline conveying medium, the pipe cleaner will be unable to slow down in the first time due to inertia during this process, thereby affecting the detection of pipe wall corrosion. Summary of the invention

[0004] Aiming at the problems existing in the prior art, a technology for monitoring and preventing oilfield wastewater corrosion is provided.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] An oilfield sewage corrosion monitoring device comprises a pipeline, a pipe cleaner, a magnetic sensor and a transmission medium for pushing the pipe cleaner to move. The pipe wall of the pipeline is magnetized, and an electromagnetic transmitting device is arranged on the pipe cleaner. The magnetic sensor is located outside the pipeline and is used to detect the signal generated by the electromagnetic transmitting device: the pipe cleaner is provided with two cleaning mechanisms and a speed limiting component located between the two cleaning mechanisms, the cleaning mechanism is provided with a transmission pipeline penetrating the pipe cleaner, the input end and the output end of the transmission pipeline are both provided with a first valve, the transmission pipeline is also provided with a flow selection port and a second valve installed at the flow selection port, the speed limiting component comprises a sleeve, a movable block, a transmission adjustment mechanism and abutment block, the sleeve is used to be connected with the two cleaning mechanisms, the movable block is slidably arranged between the sleeve and the transmission pipeline, the end of the movable block away from the flow selection port is provided with a first elastic member connected with the cleaning mechanism, the transmission adjustment mechanism is located outside the sleeve, the transmission adjustment mechanism is connected with the abutment block, the transmission adjustment mechanism is used to adjust the position of the abutment block, the abutment block is used to abut against the inner wall of the pipeline, and the cleaning component is used to clean the pipe wall of the pipeline.

[0007] Preferably, the cleaning mechanism includes a ring plate, a brush body, a connecting block and a connecting rod. Two ring plates are provided, and the two ring plates are respectively arranged at the left and right ends of the sleeve; a plurality of evenly distributed first slide grooves are provided on the ring plate, and the brush body is provided with a slide rod, which is slidably connected to the first slide groove, and a second elastic member is provided between the slide rod and the first slide groove; the connecting block is provided between two adjacent brush bodies, and the top of the connecting block is lower than the top of the slide rod, and the connecting rod is used to connect the brush body and the connecting block.

[0008] Preferably, a plurality of evenly distributed second slide grooves are provided on the surface of the sleeve, a second slider slidably connected to the second slide groove is provided on the movable block, the transmission adjustment mechanism includes a support plate and a transmission rod, the support plate is sleeved on two ring plates, the middle part of the transmission rod is hinged to the support plate, the bottom end of the transmission rod is provided with a guide slide groove slidably connected to the second slider, and the top end of the transmission rod is used to install a support block.

[0009] Preferably, a blocking plate is provided in the middle portion of the second sliding block, and a third sliding groove for sliding of the blocking plate is provided on the second sliding groove.

[0010] Preferably, a plurality of evenly distributed hinge interfaces are provided in the middle part of the transmission rod, and the transmission adjustment mechanism also includes a guide rail and a connecting block, the guide rail is height-adjustably arranged on the support plate, the connecting block is slidably arranged on the guide rail, the connecting block is provided with a shaft rod rotatably connected to the hinge interface, and a nut is sleeved on the shaft rod.

[0011] Preferably, the guide rail is also provided with a plurality of evenly distributed limiting holes, the connecting block is provided with a supporting plate that fits with the guide rail, the supporting plate is provided with a third slide groove and a dial plate, the dial plate is provided with a third slider slidably connected with the third slide groove, the dial plate is provided with a limiting block corresponding to the limiting hole, and a third elastic member is provided between the third slider and the third slide groove, and the third elastic member makes the third slider have a tendency to move toward the limiting groove.

[0012] Preferably, the support plate is provided with a protrusion for abutting against the connecting block and the brush body, the protrusion is provided with a limiting slide groove and a clamping plate slidably connected to the limiting slide groove, and the clamping plate is used to connect with the connecting block and to adjust the position of the connecting block.

[0013] An oilfield sewage corrosion prevention and control process comprises the following steps:

[0014] Step 1: The operator adjusts the position of the clamping plate on the limiting slide according to the pipe diameter, so that the brush body moves in an orderly manner through the guide rod, which makes it easier for the pipe cleaner to be inserted into the pipe and fit with the inner wall of the pipe, thereby increasing the application range of the pipe cleaner;

[0015] Step 2: The operator closes the second valve and opens the first valve at the input end of the transmission pipeline;

[0016] Step 3: The operator introduces the transmission medium into the pipeline, and controls the pressure difference before and after the pig through the first valve at the output end of the transmission pipeline to move the pig;

[0017] Step 4: The operator opens the second valve to allow part of the transmission medium to enter between the casing and the transmission pipeline. Once the speed of the pig is too fast, the transmission volume at the output end of the transmission pipeline will decrease. At this time, the hydraulic pressure of the transmission medium between the casing and the transmission pipeline will increase, so that the movable block overcomes the first elastic member to move, and the transmission rod drives the abutment block to contact the inside of the pipeline, thereby realizing the speed reduction function of the pig;

[0018] Step 5: The pipe cleaner will clean the pipe wall with a brush during the process. The electromagnetic transmitter on the pipe cleaner will cooperate with the magnetic sensor to detect whether the pipeline has magnetic leakage. If magnetic leakage occurs, it means that the pipeline is corroded and leaking, and the pipeline needs to be replaced urgently. If there is no magnetic leakage, it means that the pipeline is not corroded or leaking.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present application uses a pipe cleaner, an electromagnetic transmitting device and a magnetic sensitive sensor to monitor whether corrosion occurs on the pipe wall, and then completes the cleaning of the pipe wall through a cleaning mechanism. During this process, the operator opens the second valve to allow part of the transmission medium to enter between the casing and the transmission pipeline. Once the speed of the pipe cleaner is too fast, the transmission volume at the output end of the transmission pipeline will decrease. At this time, the hydraulic pressure of the transmission medium between the casing and the transmission pipeline will increase, causing the movable block to overcome the first elastic member to move, so that the transmission rod drives the abutment block to contact the inside of the pipeline, thereby realizing the speed reduction function of the pipe cleaner.

[0021] 2. The present application uses the raised portion to abut against the brush body and the connecting block to prevent the brush body from tilting when cleaning the pipe wall. When the pipe diameter is small, the position of the clamping plate can be adjusted to allow the connecting block to drive the brush body to move toward the axis of the pipe cleaner, thereby reducing the diameter of the circle formed between the multiple brush bodies, making it easier for the pipe cleaner to be inserted into different pipes, thereby increasing the scope of application of the pipe cleaner.

[0022] 3. The present application uses the position of the guide rail and the connecting block to connect the two with different hinge interfaces of the transmission rod, which is convenient for adjusting the transmission effect of the lever formed by the transmission rod and the friction effect of the abutment block on the pipe wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 for Figure 1 A local enlarged view of point A;

[0025] Figure 3 for Figure 1 A local enlarged view of point B;

[0026] Figure 4 It is a front view of the present invention;

[0027] Figure 5 for Figure 4 A cross-sectional view at the CC section of FIG.

[0028] Figure 6 for Figure 5 A local enlarged view of point E;

[0029] Figure 7 for Figure 5 A local enlarged view of point F;

[0030] Figure 8 for Figure 4 Partial cross-sectional view at section DD.

[0031] The numbers in the figure are:

[0032] 1-cleaning mechanism; 11-transmission pipeline; 111-selective flow port; 12-ring plate; 121-first chute; 13-brush body; 131-slide rod; 132-second elastic member; 14-connecting block; 15-connecting rod; 2-speed limit assembly; 21-casing; 211-second chute; 2111-third chute; 22-movable block; 221-first elastic member; 222-second slider; 2221-blocking plate; 23-transmission adjustment mechanism; 231 - support plate; 2311- raised portion; 2312- limiting slide groove; 2313- clamping plate; 232- transmission rod; 2321- guide slide groove; 2322- hinge interface; 233- guide rail; 2331- limiting hole; 234- connecting block; 2341- shaft rod; 2342- support plate; 2343- fourth slide groove; 2344- dial plate; 2345- third slider; 2346- limiting block; 2347- third elastic member; 24- support block. DETAILED DESCRIPTION

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0034] like Figures 1 to 8 As shown; an oilfield sewage corrosion monitoring device, including a pipeline, a pipe cleaner, a magnetic sensor and a transmission medium for pushing the pipe cleaner to move, the pipe wall of the pipeline is magnetized, the pipe cleaner is provided with an electromagnetic transmitting device, the magnetic sensor is located outside the pipeline and is used to detect the signal generated by the electromagnetic transmitting device: the pipe cleaner is provided with two cleaning mechanisms and a speed limiting component 2 located between the two cleaning mechanisms, the cleaning mechanism is provided with a transmission pipeline that passes through the pipe cleaner, the input end and the output end of the transmission pipeline are both provided with a first valve, the transmission pipeline is also provided with a flow selection port 111 and a speed limiting component 2 installed at the flow selection port 111 The second valve, the speed limiting assembly 2 includes a sleeve 21, a movable block 22, a transmission adjustment mechanism 23 and abutment block 24, the sleeve 21 is used to connect with two cleaning mechanisms, the movable block 22 is slidably arranged between the sleeve 21 and the transmission pipeline, and the end of the movable block 22 away from the flow selection port 111 is provided with a first elastic member 221 connected with the cleaning mechanism, the transmission adjustment mechanism 23 is located on the outside of the sleeve 21, the transmission adjustment mechanism 23 is connected with the abutment block 24, the transmission adjustment mechanism 23 is used to adjust the position of the abutment block 24, the abutment block 24 is used to abut against the inner wall of the pipeline, and the cleaning assembly is used to clean the pipe wall of the pipeline.

[0035] It should be noted that the pipeline, the first valve, the second valve, the electromagnetic transmitting device and the magnetic sensor are all existing technologies, so they are not drawn in the figure. The transmission medium is gas or liquid. First, the staff inserts the pipe cleaner into the pipeline and pushes the pipe cleaner to move inside the pipeline through the transmission medium. During this process, the electromagnetic transmitting device will form a magnetic circuit with the pipe wall. When there are no defects in the pipe wall, the magnetic lines are constrained within the pipe wall, and the magnetic flux is parallel to the material surface. There is almost no magnetic line of force passing through the surface; when there are defects in the pipe wall or the material organization state changes, the magnetic permeability will change. Since the magnetic lines of force in the pipe wall are saturated, the magnetic flux is distorted, and the magnetic lines of force at the defect are repelled and pass through the pipe wall to produce leakage magnetic field. The leaked part of the magnetic field is collected by a magnetic sensor probe, thereby detecting the corrosion of the inner wall of the pipeline. During this process, the second valve is in a closed state. The operator changes the pressure difference between the front and rear of the pig through the control of the first valve, thereby controlling the movement of the pig. Thereafter, the second valve is opened to allow part of the transmission medium to enter between the casing 21 and the transmission pipeline. Once the speed of the pig is too fast, the transmission volume at the output end of the transmission pipeline will decrease. At this time, the hydraulic pressure of the transmission medium between the casing 21 and the transmission pipeline will increase, so that the movable block 22 overcomes the first elastic member 221 to move, and the transmission rod 232 drives the abutment block 24 to contact the inside of the pipeline, thereby realizing the speed reduction function of the pig and preventing the pig from speeding too fast.

[0036] The cleaning mechanism includes a ring plate 12, a brush body 13, a connecting block 14 and a connecting rod 15. Two ring plates 12 are provided, and the two ring plates 12 are respectively arranged at the left and right ends of the sleeve 21; a plurality of evenly distributed first slide grooves 121 are provided on the ring plate 12, and the brush body 13 is provided with a sliding rod 131, which is slidably connected to the first slide groove 121, and a second elastic member 132 is provided between the sliding rod 131 and the first slide groove 121. The connecting block 14 is arranged between two adjacent brush bodies 13, and the top of the connecting block 14 is lower than the top of the sliding rod 131. The connecting rod 15 is used to connect the brush body 13 and the connecting block 14.

[0037] like Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown; when the pipe cleaner moves into the interior of the pipeline, due to the different diameters of the existing pipelines, the position of the brush body 13 is also different, so the slide bar 131 and the first slide groove 121 facilitate the change of the position of the brush body 13, thereby increasing the applicable scope of the pipe cleaner, and the connecting block 14 and the connecting rod 15 connect two adjacent brush bodies 13 to prevent part of the brush body 13 from abutting against the dirt inside the pipeline, thereby causing the slide bar 131 to tilt, affecting the extension and retraction of the brush body 13, and further affecting the movement of the pipe cleaner.

[0038] A plurality of evenly distributed second slide grooves 211 are provided on the surface of the sleeve 21, a second slider 222 slidably connected to the second slide groove 211 is provided on the movable block 22, the transmission adjustment mechanism 23 includes a support plate 231 and a transmission rod 232, the support plate 231 is sleeved on the two ring plates 12, the middle part of the transmission rod 232 is hinged to the support plate 231, the bottom end of the transmission rod 232 is provided with a guide slide groove 2321 slidably connected to the second slider 222, and the top end of the transmission rod 232 is used to install the abutment block 24.

[0039] like Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown; when the movable block 22 moves due to the pressure, the second slider 222 will move stably on the second slide groove 211 during this process, and the bottom end of the transmission rod 232 will move with the second slider 222, so that the top end of the transmission rod 232 that forms a lever with the support plate 231 is displaced, so that the abutment block 24 at the top end of the transmission rod 232 gradually approaches the pipe wall. Since the movement of the transmission rod 232 is an arc, the bottom end of the transmission rod 232 will gradually extend toward the second slider 222 during the movement. Therefore, it is necessary to facilitate the movement of the transmission rod 232 through the guide slide groove 2321 to prevent the transmission rod 232 from getting stuck, thereby affecting the contact between the abutment block 24 and the baffle.

[0040] A blocking plate 2221 is disposed in the middle portion of the second sliding block 222 , and a third sliding groove 2111 for sliding of the blocking plate 2221 is disposed on the second sliding groove 211 .

[0041] like Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown; the sealing plate 2221 and the third slide groove 2111 make the sleeve and the transmission pipeline in a sealed state, preventing a gap from appearing between the second slide groove 211 and the second slider 222, causing the transmission medium to flow out of the opening, affecting the movement and deceleration effect of the customs clearance device.

[0042] A plurality of evenly distributed hinge ports 2322 are arranged in the middle portion of the transmission rod 232. The transmission adjustment mechanism 23 also includes a guide rail 233 and a connecting block 234. The guide rail 233 is height-adjustably arranged on the support plate 231. The connecting block 234 is slidably arranged on the guide rail 233. The connecting block 234 is provided with a shaft rod 2341 rotatably connected to the hinge port 2322, and a nut is sleeved on the shaft rod 2341.

[0043] like Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 8 As shown; it should be noted that the support plate 231 is provided with a guide groove for adjusting the height of the guide rail 233, and both ends of the guide rail 233 are provided with sliding blocks connected to the guide groove, and threaded holes are provided on the sliding blocks and the guide groove. By adjusting the height of the guide rail 233 on the support plate 231 and the position of the connecting block 234 on the guide rail 233, the connecting block 14 can be connected to the hinge interface 2322 at different positions on the transmission rod 232, so as to facilitate the adjustment of the transmission effect of the lever formed by the transmission rod 232.

[0044] The guide rail 233 is also provided with a plurality of evenly distributed limiting holes 2331, the connecting block 234 is provided with a supporting plate 2342 which fits with the guide rail 233, the supporting plate 2342 is provided with a fourth slide groove 2343 and a dial plate 2344, the dial plate 2344 is provided with a third slider 2345 which is slidably connected with the fourth slide groove 2343, the dial plate 2344 is provided with a limiting block 2346 corresponding to the limiting hole 2331, a third elastic member 2347 is provided between the third slider 2345 and the fourth slide groove 2343, and the third elastic member 2347 makes the third slider 2345 tend to move toward the limiting groove.

[0045] like Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 8 As shown; the third elastic member 2347 causes the third slider 2345 to move toward the guide rail 233, so that the limit block 2346 is inserted into the limit groove, so that the connecting block 234 is fixed to the guide rail 233, to prevent the position of the connecting rod 15 from changing during the movement and affecting the deceleration effect, and the dial plate 2344 is convenient for grabbing, thereby adjusting the position of the connecting block 234 on the guide rail 233.

[0046] The support plate 231 is provided with a protrusion 2311 for abutting against the connecting block 14 and the brush body 13. The protrusion 2311 is provided with a limiting slide groove 2312 and a clamping plate 2313 slidably connected to the limiting slide groove 2312. The clamping plate 2313 is used to connect with the connecting block 14 and to adjust the position of the connecting block 14.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8As shown; the raised portion 2311 abuts against the brush body 13 and the connecting block 14 to prevent the brush body 13 from tilting when cleaning the pipe wall. When the pipe diameter is small, the position of the clamping plate 2313 can be adjusted to allow the connecting block 14 to drive the brush body 13 to move toward the axis of the pipe cleaner, thereby reducing the diameter of the circle formed between the multiple brush bodies 13, making it easier for the pipe cleaner to be inserted into the pipe. It should be noted that a threaded hole for fixing the position of the clamping plate 2313 is also provided between the clamping plate 2313 and the limiting slide groove 2312.

[0048] An oilfield sewage corrosion prevention and control process comprises the following steps:

[0049] Step 1: The operator adjusts the position of the clamping plate 2313 on the limiting slide groove 2312 according to the pipe diameter, so that the brush body 13 moves in an orderly manner through the guide rod, which facilitates the pipe cleaner to be inserted into the pipe and fit with the inner wall of the pipe, thereby increasing the application range of the pipe cleaner;

[0050] Step 2: The operator closes the second valve and opens the first valve at the input end of the transmission pipeline;

[0051] Step 3: The operator introduces the transmission medium into the pipeline, and controls the pressure difference before and after the pig through the first valve at the output end of the transmission pipeline to move the pig;

[0052] Step 4: The operator opens the second valve to allow part of the transmission medium to enter between the casing 21 and the transmission pipeline. Once the speed of the pig is too fast, the transmission volume at the output end of the transmission pipeline will decrease. At this time, the hydraulic pressure of the transmission medium between the casing 21 and the transmission pipeline will increase, so that the movable block 22 overcomes the first elastic member 221 to move, and the transmission rod 232 drives the abutment block 24 to contact the inside of the pipeline, thereby realizing the speed reduction function of the pig;

[0053] Step 5: The pipe cleaner will clean the pipe wall through the brush body 13 during the process. The electromagnetic transmitting device on the pipe cleaner will cooperate with the magnetic sensor to detect whether the pipeline generates magnetic leakage. If magnetic leakage occurs, it means that the pipeline is corroded and leaking, and the pipeline needs to be replaced urgently. If no magnetic leakage occurs, it means that the pipeline is not corroded and leaking.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An oilfield sewage corrosion monitoring device, comprising a pipeline, a pig, a magnetic sensor and a transmission medium for driving the pig to move, the pipe wall of the pipeline is magnetized, an electromagnetic transmitting device is provided on the pig, the magnetic sensor is located outside the pipeline and is used to detect the signal generated by the electromagnetic transmitting device: characterized in that, The pipe cleaner is provided with two cleaning mechanisms and a speed limiting assembly (2) located between the two cleaning mechanisms. The cleaning mechanism is provided with a transmission pipeline that passes through the pipe cleaner. The input end and the output end of the transmission pipeline are both provided with a first valve. The transmission pipeline is also provided with a flow selection port (111) and a second valve installed at the flow selection port (111). The speed limiting assembly (2) comprises a sleeve (21), a movable block (22), a transmission adjustment mechanism (23) and a stop block (24). The sleeve (21) is used to connect with the two cleaning mechanisms. The movable block (22) is slidably arranged between the sleeve (21) and the transmission pipeline. , a first elastic member (221) connected to a cleaning mechanism is provided at one end of the movable block (22) away from the flow selection port (111), the transmission adjustment mechanism (23) is located outside the sleeve (21), the cleaning mechanism comprises a ring plate (12), the transmission adjustment mechanism (23) is respectively connected to the abutment block (24) and the ring plate (12), two ring plates (12) are provided, and the two ring plates (12) are respectively provided at the left and right ends of the sleeve (21), the transmission adjustment mechanism (23) is used to adjust the position of the abutment block (24), the abutment block (24) is used to abut against the inner wall of the pipeline, and the cleaning assembly is used to clean the pipe wall of the pipeline; The surface of the sleeve (21) is provided with a plurality of evenly distributed second slide grooves (211); the movable block (22) is provided with a second slider (222) slidably connected to the second slide groove (211); the transmission adjustment mechanism (23) comprises a support plate (231) and a transmission rod (232); the support plate (231) is sleeved on the two ring plates (12); the middle portion of the transmission rod (232) is hinged to the support plate (231); the bottom end of the transmission rod (232) is provided with a guide slide groove (2321) slidably connected to the second slider (222); the top end of the transmission rod (232) is used for mounting abutment block (24); A blocking plate (2221) is provided in the middle portion of the second sliding block (222), and a third sliding groove (2111) for sliding the blocking plate (2221) is provided on the second sliding groove (211).

2. The oilfield wastewater corrosion monitoring device according to claim 1 is characterized in that: The cleaning mechanism comprises a brush body (13), a connecting block (14) and a connecting rod (15); a plurality of evenly distributed first slide grooves (121) are provided on the ring plate (12); the brush body (13) is provided with a sliding rod (131); the sliding rod (131) is slidably connected to the first slide groove (121); a second elastic member (132) is provided between the sliding rod (131) and the first slide groove (121); the connecting block (14) is provided between two adjacent brush bodies (13); the top end of the connecting block (14) is lower than the top end of the sliding rod (131); and the connecting rod (15) is used to connect the brush body (13) and the connecting block (14).

3. The oilfield wastewater corrosion monitoring device according to claim 1 is characterized in that: The middle portion of the transmission rod (232) is provided with a plurality of evenly distributed hinge interfaces (2322). The transmission adjustment mechanism (23) further comprises a guide rail (233) and a connecting block (234). The guide rail (233) is arranged on the support plate (231) in a height-adjustable manner. The connecting block (234) is slidably arranged on the guide rail (233). The connecting block (234) is provided with a shaft rod (2341) rotatably connected to the hinge interface (2322). A nut is sleeved on the shaft rod (2341).

4. The oilfield wastewater corrosion monitoring device according to claim 3 is characterized in that: The guide rail (233) is also provided with a plurality of evenly distributed limiting holes (2331); the connecting block (234) is provided with a supporting plate (2342) that fits the guide rail (233); the supporting plate (2342) is provided with a fourth sliding groove (2343) and a shifting plate (2344); the shifting plate (2344) is provided with a third sliding block (2345) that is slidably connected to the fourth sliding groove (2343); the shifting plate (2344) is provided with a limiting block (2346) corresponding to the limiting hole (2331); a third elastic member (2347) is provided between the third sliding block (2345) and the fourth sliding groove (2343); the third elastic member (2347) enables the third sliding block (2345) to have a tendency to move toward the limiting groove.

5. The oilfield wastewater corrosion monitoring device according to claim 4 is characterized in that: The support plate (231) is provided with a protrusion (2311) for abutting against the connection block (14) and the brush body (13); the protrusion (2311) is provided with a limit slide groove (2312) and a clamping plate (2313) slidably connected to the limit slide groove (2312); the clamping plate (2313) is used to connect to the connection block (14) and to adjust the position of the connection block (14).

6. A process for preventing and controlling oilfield wastewater corrosion, using the oilfield wastewater corrosion monitoring device according to claim 5, characterized in that: The following steps are included: Step 1: The operator adjusts the position of the clamping plate (2313) on the limiting slide groove (2312) according to the pipe diameter, so that the brush body (13) moves in an orderly manner through the guide rod, which facilitates the pipe cleaner to be inserted into the pipe and fit with the inner wall of the pipe, thereby increasing the application range of the pipe cleaner; Step 2: The operator closes the second valve and opens the first valve at the input end of the transmission pipeline; Step 3: The operator introduces the transmission medium into the pipeline, and controls the pressure difference before and after the pig through the first valve at the output end of the transmission pipeline to move the pig; Step 4: The operator opens the second valve to allow part of the transmission medium to flow into the space between the casing (21) and the transmission pipeline. Once the speed of the pipe cleaner is too fast, the transmission volume at the output end of the transmission pipeline will decrease. At this time, the hydraulic pressure of the transmission medium between the casing (21) and the transmission pipeline will increase, causing the movable block (22) to overcome the first elastic member (221) and move, so that the transmission rod (232) drives the abutment block (24) to contact the inside of the pipeline, thereby realizing the speed reduction function of the pipe cleaner. Step 5: During the process, the pipe cleaner will clean the pipe wall through the brush body (13). The electromagnetic transmitting device on the pipe cleaner will cooperate with the magnetic sensor to detect whether the pipeline has magnetic leakage. If magnetic leakage occurs, it means that the pipeline is corroded and leaking, and the pipeline needs to be replaced urgently. If no magnetic leakage occurs, it means that the pipeline is not corroded and leaking.

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