Corrosion resistance testing device for horizontal well oil pipe

Abstract

The invention discloses a horizontal well oil pipe corrosion resistance testing device which comprises a testing main body and a weighing mechanism fixedly connected with the upper surface of the testing main body, a stretching mechanism is arranged at the position, close to the upper portion, in the testing main body, a mounting groove is formed in the position, below the stretching mechanism, of the rear side of the testing main body, and a circulating mechanism is arranged in the mounting groove. A motor is arranged on one side of the circulating mechanism, a PLC control module is fixedly installed on the surface of one side of the testing body, the circulating mechanism comprises a circulating bin and a driving wheel arranged in one side of the interior of the circulating bin, the driving wheel is connected with two symmetrically-distributed rotating discs in a meshed mode, and first meshing teeth are fixedly arranged on the opposite inner sides of the two rotating discs; a rotating cylinder is arranged between the two rotating discs, and second meshing teeth are arranged at the two ends of the rotating cylinder. According to the invention, by arranging the circulating mechanism, a circulating corrosion resistance test can be carried out, so that the effects of high test efficiency, circulating test, synchronous test and accurate test are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of horizontal well tubing, and particularly relates to a horizontal well tubing corrosion resistance testing device. BACKGROUND

[0002] The horizontal well tubing corrosion resistance testing device is a special device for simulating the complex downhole environment of a horizontal well, scientifically evaluating the corrosion resistance of tubing materials or anticorrosive coatings in a laboratory.

[0003] The core function of the horizontal well tubing corrosion resistance testing device is to reproduce the downhole corrosion conditions, accelerate the corrosion process, and quickly obtain key data such as the corrosion rate and cracking resistance of the tubing, thereby providing experimental basis for tubing selection and anticorrosion process optimization. However, there is no horizontal well tubing corrosion resistance testing device on the market, and the current testing of horizontal well tubing is to sequentially introduce different corrosive substances into the pipeline and then discharge them through the pipeline to complete the testing. However, this testing method cannot accurately simulate the use environment of the horizontal well tubing, resulting in inaccurate test data and very low testing efficiency. Moreover, testing the horizontal well tubing only with corrosive substances can only test the corrosion rate of the horizontal well tubing under stress-free conditions, which may also lead to inaccurate test results. If only corrosive substances or tensile testing is performed, the use of the horizontal well cannot be truly restored, and therefore, a device capable of tensile testing and corrosion testing is needed.

[0004] Therefore, we provide a horizontal well tubing corrosion resistance testing device. SUMMARY

[0005] The present application aims to solve the above technical problems and provides a horizontal well tubing corrosion resistance testing device, which has the effects of high testing efficiency, cyclic testing, synchronous testing, and accurate testing.

[0006] Therefore, the present application provides a horizontal well tubing corrosion resistance testing device, which includes a testing body, a weighing mechanism fixedly connected to the upper surface of the testing body, a tensile mechanism arranged inside the testing body near the upper side, an installation slot arranged on the rear side of the testing body below the tensile mechanism, a circulation mechanism arranged inside the installation slot, a motor arranged on one side of the circulation mechanism, and a PLC control module fixedly installed on one side surface of the testing body. The circulating mechanism comprises a circulating bin, a driving wheel arranged inside one side of the circulating bin, two symmetrical rotating discs connected with the driving wheel, engagement teeth I fixedly arranged on the opposite inner sides of the two rotating discs, a rotating cylinder arranged between the two rotating discs, engagement teeth II arranged on both ends of the rotating cylinder, a rotating rod fixedly and penetratingly arranged inside the rotating cylinder, a screw thread arranged on the middle part of the rotating rod, two symmetrical fixed blocks rotatably connected with both ends of the screw thread, springs fixedly arranged on the opposite sides of the two fixed blocks, a moving block threadedly connected with the screw thread surface, a magnet fixedly connected with one end of the moving block, a moving cylinder rotatably connected with the end of the rotating rod, a limiting groove arranged on the circumference of the moving cylinder, a supporting block slidably connected with the circumference of the limiting groove, and a first spring arranged inside the supporting block with a limiting ball rotatably connected with one end of the first spring.

[0007] Preferably, the stretching mechanism comprises two symmetrical fixed plates I and an electric sliding rail I fixedly connected with the lower end of the two fixed plates I, two symmetrical fixed plates II arranged on one side of the fixed plate I, an electric sliding rail II fixedly connected with the lower end of the two fixed plates II, anti-skid strips fixedly arranged on the inner walls of the upper halves of the fixed plates I and the fixed plates II, a shunt bin arranged between the two fixed plates II, taper-shaped speed-changing pipes fixedly arranged on the surfaces of the two sides of the shunt bin, sealing rings fixedly arranged on the circumferences of the speed-changing pipes, and a concentrated conveying pipe fixedly arranged on one side of the shunt bin.

[0008] Preferably, a conveying pipe is arranged above the magnet, a plugging mechanism is arranged inside the conveying pipe, the plugging mechanism comprises a second spring and a telescopic rod arranged inside the second spring, a plugging block is fixedly connected with the upper end of the second spring and the telescopic rod, the lower end of the second spring and the telescopic rod is fixedly connected with the inner wall of the conveying pipe, and the conveying pipe is in communication with the concentrated conveying pipe.

[0009] Preferably, the rotating rod is rotatably connected with the inner wall of the rotating disc, the supporting block is two and symmetrical, one end of the rotating rod extends into the supporting block, and the other end of the rotating rod extends to the outside of the other supporting block.

[0010] Preferably, the weighing mechanism comprises a weighing table and a weighing sensor fixedly connected with the upper surface of the weighing table, and a fixed frame is arranged on the upper end of the weighing sensor.

[0011] Preferably, the side surface of the driving wheel is fixedly connected with the output shaft of the motor, and the motor is fixedly connected with the outside of the test body.

[0012] Preferably, sliding grooves are arranged on the opposite sides of the inner wall of the circulating bin, sliding rods are fixedly arranged on the two sides of the moving block, the sliding rods are slidably connected with the inner wall of the sliding grooves, and the sliding rods are two groups, each group having two sliding rods.

[0013] Preferably, the limiting grooves are two groups, and each group has two limiting grooves, the first spring and the limiting ball are two, and are distributed in an upper and lower manner.

[0014] Preferably, the length of the rotating drum is less than the distance between the two rotating discs, and the engaging teeth two are engaged with the engaging teeth one.

[0015] Preferably, the inner wall of the mounting groove is fixedly provided with a gas-liquid treatment box and a conveying box, and the conveying box is fixedly connected with the lower end of the conveying pipe and is in internal communication.

[0016] Compared with the prior art, the horizontal well oil pipe corrosion resistance testing device has the following beneficial effects: The circulating mechanism is arranged, the circulating corrosion resistance testing can be performed, the testing efficiency is high, the circulating testing, the synchronous testing and the testing accuracy are achieved.

[0017] The weighing mechanism is arranged, the horizontal well oil pipe can be accurately tested, and the testing accuracy is achieved.

[0018] The stretching mechanism is arranged, the horizontal well oil pipe can be docked and stretched at the same time, the separate stretching testing step is saved, and the testing efficiency is high.

[0019] The rotating drum, the rotating disc, the engaging teeth two and the engaging teeth one are combined, power can be provided when the rotating rod rotates, and the rotating rod can also be reversed, the accurate operation of the circulating mechanism is ensured, and the accurate operation of the circulating mechanism is achieved.

[0020] The sealing mechanism is arranged, the conveying pipe can be controlled, and the accuracy of the circulating testing and the accurate control of the circulating testing are ensured.

[0021] The parts not involved in the device are the same as or can be realized by the prior art, the device has the advantages of simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The horizontal well oil pipe corrosion resistance testing device is provided with an overall structure schematic view; Figure 2 The horizontal well oil pipe corrosion resistance testing device is provided with a cross-sectional structure schematic view; Figure 3 The horizontal well oil pipe corrosion resistance testing device is provided with an enlarged schematic view of the structure at A; Figure 4A rear view structure schematic view of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 5 A tensile mechanism structure schematic view of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 6 An enlarged schematic view of the structure at B of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 7 An enlarged schematic view of the structure at C of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 8 A weighing mechanism structure schematic view of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 9 A cross-sectional structure schematic view of a circulating mechanism of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 10 An enlarged schematic view of the structure at D of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 11 An enlarged schematic view of the structure at E of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 12 A circulating mechanism structure schematic view of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 13 An enlarged schematic view of the structure at F of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application; Figure 14 An enlarged schematic view of the structure at G of a horizontal well oil pipe corrosion-resistant testing device is provided in the present application.

[0023] In the figure: 1, test main body; 2, tensile mechanism; 3, weighing mechanism; 4, circulating mechanism; 5, gas-liquid treatment box; 6, plugging mechanism; 7, conveying box; 8, mounting groove; 9, motor; 10, PLC control module; 20, fixed plate one; 21, fixed plate two; 22, electric sliding rail one; 23, electric sliding rail two; 24, shunt bin; 25, variable speed pipe; 26, sealing ring; 27, anti-skid strip; 28, centralized conveying pipe; 31, fixed frame; 32, weighing sensor; 33, weighing table; 40, circulating bin; 41, support block; 42, rotating rod; 43, conveying pipe; 44, driving wheel; 45, rotating disc; 46, screw thread; 47, fixed block; 48, spring; 49, sliding rod; 410, moving cylinder; 411, magnet; 412, moving block; 413, rotating cylinder; 414, first spring; 415, limiting groove; 416, engagement tooth one; 417, engagement tooth two; 418, limiting ball; 419, sliding groove; 61, second spring; 62, telescopic rod; 63, plugging block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0026] Example: A horizontal well oil pipe corrosion resistance testing device, such as Figure 1 - Figure 14 As shown, it includes a test body 1 and a weighing mechanism 3 fixedly connected to the upper surface of the test body 1. A stretching mechanism 2 is provided near the top of the test body 1. A mounting slot 8 is provided on the rear side of the test body 1 below the stretching mechanism 2. A circulation mechanism 4 is provided inside the mounting slot 8. A motor 9 is provided on one side of the circulation mechanism 4. A PLC control module 10 is fixedly installed on one side of the test body 1. The circulation mechanism 4 includes a circulation chamber 40 and a driving wheel 44 built into one side of the circulation chamber 40. The driving wheel 44 is meshed and connected with two symmetrically distributed turntables 45. The opposite inner sides of the two turntables 45 are fixedly provided with meshing teeth 1 416. A rotating drum 413 is provided between the two turntables 45. Both ends of the rotating drum 413 are provided with meshing teeth 2 417. A rotating rod 42 is fixedly installed through the rotating drum 413. The middle circumference of the rotating rod 42 is provided with a thread 46. The circumference of the rotating rod 42 is located at both ends of the thread 46 and is rotatably connected with two symmetrically distributed turntables 45. The fixed blocks 47 are distributed, and springs 48 are fixedly installed on the opposite sides of the two fixed blocks 47. The surface of the thread 46 is threadedly connected to the moving block 412, and one end of the moving block 412 is fixedly connected to the magnet 411. The end of the rotating rod 42 is rotatably connected to the moving cylinder 410, and a limiting groove 415 is provided on the circumference of the moving cylinder 410. The circumference of the limiting groove 415 is slidably connected to the support block 41. A first spring 414 is provided inside the support block 41, and one end of the first spring 414 is rotatably connected to the limiting ball 418, and the limiting ball 418 slides in the limiting groove 415.

[0027] The connection and control of the PLC control module 10 and the motor 9 are prior art, and will not be described here. The upper end of the weighing sensor 32 is fixedly connected with a horizontal plate, and the fixing frame 31 is fixedly installed on the horizontal plate. The weighing sensor 32 is prior art, and will not be described here. The conveying pipes 43 are a plurality of pipes and are arranged in sequence. The loss of weight method is to accurately weigh the sample mass before and after the test, calculate the weight loss per unit area, and convert it into the corrosion rate. The principle is that the essence of metal corrosion is anodic dissolution. The dissolved metal ions enter the medium, resulting in a decrease in the weight of the sample. The weight loss is proportional to the corrosion rate. The internal surface area of the horizontal well pipe exposed to the corrosive environment is calculated by the formula: internal surface area = inner wall circumference x effective length. The largest sealing ring 26 occupies a certain area, so the outer surface area of the sealing ring 26 needs to be subtracted. The outer surface area of the sealing ring 26 is calculated by the formula: annular outer surface area = outer circumference x axial length. The conveying box 7 is internally divided into a plurality of conveying pipes 43, which sequentially contain carbon dioxide gas, hydrogen sulfide gas, carbon dioxide and hydrogen sulfide mixed gas, and high-chloride salt water, etc. The above-mentioned gases and liquids are conveyed by magnetic drive centrifugal pumps and fluorine-lined plastic pumps. The magnetic drive centrifugal pump and the fluorine-lined plastic pump are prior art, and will not be described here and are not shown in the figure. The driving wheel 44 is provided with a groove on the side, and the rotating disc 45 is fixedly installed with a lever on the side. The driving wheel 44 is connected with the rotating disc 45 through the groove and the lever.

[0028] When the horizontal well pipe is tested, first, the produced horizontal well pipe is randomly cut into two sections, and the cutting end is a horizontal and vertical smooth cutting surface. Then, the exposed area of the horizontal well pipe in the corrosive environment is measured manually using a measuring ruler, and then recorded. Then, the horizontal well pipe to be tested is placed on the weighing mechanism 3 in turn by manual taking. Then, the weight of the initial horizontal well pipe before testing is recorded. When the horizontal well pipe is weighed, the horizontal well pipe is placed on the stretching mechanism 2 by manual taking. The horizontal well pipe should be taken manually to avoid direct contact with the hands, thereby reducing the influence of sweat or other corrosive substances on the hands on the horizontal well pipe, thereby increasing the detection accuracy of the device. At the same time, the horizontal well pipe should be avoided from being knocked during the taking process, so as to avoid the surface from being uneven, which may cause the clamping of the horizontal well pipe to be unable to achieve clamping. Then, the cover is closed, and the stretching mechanism 2 is started. The stretching of the stretching mechanism 2 can test the horizontal well pipe. During the testing process of the stretching mechanism 2, the horizontal well pipe can be connected with the variable speed pipe 25. At this time, the start switch on the operation table is turned on, and the motor 9 is controlled by the PLC control module 10. As Figure 14As shown, the motor 9 starts to start, the rotation of the motor 9 output shaft can drive the driving wheel 44, the initial state of rotation is the meshing tooth two 417 on the left side of the rotating drum 413 and the meshing tooth one 416 on the rotating disc 45 on the left side of the rotating drum 413 meshing rotation, the rotation of the driving wheel 44 can rotate the rotating disc 45, then the meshing tooth one 416 starts to rotate, the meshing tooth one 416 drives the meshing tooth two 417, so that the meshing tooth two 417 rotates the rotating drum 413, when the rotating drum 413 starts to rotate, the rotating rod 42 can rotate under the support of the fixed block 47, the fixed block 47 can ensure the stable rotation of the rotating rod 42, at the same time, the moving block 412 cooperates with the screw 46 to move on the rotating rod 42, when the moving block 412 moves to the lower side of the conveying pipe 43, the magnet 411 on the rotating rod 42 can attract the plugging mechanism 6, the plugging mechanism 6 attracted by the magnet 411 moves towards the magnet 411, at the same time, the plugging mechanism 6 releases the plugging state of the conveying pipe 43, at this time, the carbon dioxide gas flows into the stretching mechanism 2 through the conveying pipe 43, and enters the horizontal well pipe through the acceleration of the stretching mechanism 2, at the same time, the PLC control module 10 controls the motor 9 to stop running, so that the rotating rod 42 stops rotating at this time, and the moving block 412 also stops rotating, the carbon dioxide gas continues to enter the horizontal well pipe, after the motor 9 stops for a period of time, the PLC control module 10 controls the motor 9 again, starts the motor 9, the moving block 412 starts to move, and the distance between the magnet 411 and the plugging mechanism 6 starts to increase, the plugging mechanism 6 loses the attraction and starts to return to the initial position, at the same time, the conveying pipe 43 is again plugged by the plugging mechanism 6, and the carbon dioxide gas stops flowing, when the moving block 412 drives the magnet 411 to move to the lower side of another conveying pipe 43, the magnet 411 again attracts the plugging mechanism 6 in the conveying pipe 43, the plugging mechanism 6 again releases the plugging of the conveying pipe 43, at this time, the hydrogen sulfide gas starts to flow, the conveying pipe 43 is a plurality of carbon dioxide gas conveying pipes, hydrogen sulfide gas conveying pipes, carbon dioxide and hydrogen sulfide mixed gas conveying pipes, high chloride salt water conveying pipes and the like, as described above, the moving block 412 can attract the plugging mechanism 6 in the conveying pipe 43 in turn, so that the above-mentioned various gases and high chloride salt water and the like liquid can be tested in sequence in one device, compared with the separate test mode, the plurality of conveying pipes 43 are used for concentrated test in sequence, which can achieve the effect of high test efficiency, and the timing start time of the motor 9 controlled by the PLC control module 10 can measure the corrosion severity of one gas or liquid to the horizontal well pipe respectively, and the corrosion prevention scheme can be made according to the corrosion condition, which can achieve the effect of accurate test, at this time, when the moving block 412 moves to one side of the fixed block 47 and contacts the spring 48, the moving block 412 can extrude the spring 48, the spring 48 starts to contract, and the extrusion force is transmitted to the rotating rod 42 through the moving block 412, the extrusion force is converted into thrust,The rotating rod 42 can transmit the thrust force to the moving cylinder 410, and through the force borne by the moving cylinder 410, the moving cylinder 410 can move, while the limiting groove 415 extrudes the limiting ball 418, the limiting ball 418 is extruded to move close to the first spring 414, the first spring 414 performs a contraction action, the limiting ball 418 moves to the outside of the limiting groove 415, so that the moving cylinder 410 drives the rotating rod 42 to move, then another limiting groove 415 can move to the limiting ball 418, the first spring 414 and the limiting ball 418 lose the extrusion force of the moving cylinder 410 on them, the first spring 414 performs an extension action, the limiting ball 418 is pushed and enters the inside of the limiting groove 415, so as to complete the position limitation of the rotating rod 42, at the same time, the moving rotating rod 42 drives the rotating cylinder 413, and then the other meshing teeth two 417 on the rotating cylinder 413 are engaged with the meshing teeth one 416 on the rotating disc 45 on the other side, through the rotation of the rotating disc 45, the rotating rod 42 starts to reverse, and at the same time can make the moving block 412 move reversely, and the reverse movement of the moving block 412 reaches the lower side of the conveying pipe 43 in turn again, so as to attract the plugging mechanism 6 again, because the corrosion of the horizontal well tubing is not a simple superposition of single medium action, but a complex process under the alternating action of different media, therefore, the cyclic gas and high-chlorine salt water conversion test can be closer to the use and environment of the horizontal well tubing, so that the corrosion resistance test of the horizontal well tubing can be accurately evaluated and accurate data can be obtained, and the cyclic test can accelerate the expansion of potential defects and expose the corrosion risk in advance, therefore, the cyclic test can achieve the effects of high test efficiency, cyclic test, synchronous test and accurate test precision, when the test is completed, the horizontal well tubing is taken out and placed on the fixing frame 31 in turn, through the weight comparison before and after the test, then calculation can be carried out, so as to obtain the corrosion resistance of the horizontal well tubing.

[0029] As shown in Figure 1 Figure 14 The stretching mechanism 2 includes two fixed plates one 20 which are symmetrically distributed, and an electric sliding rail one 22 fixedly connected with the lower ends of the two fixed plates one 20, one side of the fixed plate one 20 is provided with two fixed plates two 21 which are symmetrically distributed, the lower ends of the two fixed plates two 21 are fixedly connected with an electric sliding rail two 23, the inner walls of the upper halves of the fixed plate one 20 and the fixed plate two 21 are fixedly installed with anti-skid strips 27, a shunt bin 24 is arranged between the two fixed plates two 21, taper-shaped speed change pipes 25 are fixedly installed on the surfaces of the two sides of the shunt bin 24, sealing rings 26 are fixedly installed on the circumferences of the speed change pipes 25, and a concentrated conveying pipe 28 is fixedly installed on one side of the shunt bin 24.

[0030] ​The electric slide rail 22 and the electric slide rail 23 are two and symmetrically distributed, the moving speed of the electric slide rail 23 is greater than that of the electric slide rail 22, the sealing ring 26 is several, the anti-skid strip 27 is several, one side of the fixed plate 20 is provided with a corrugated pipe, the corrugated pipe is made of nickel-copper alloy material, and one side of the upper end of the fixed plate 20 is openable and the other side is fixed. The fixed side is fixedly connected with the corrugated pipe, and the corrugated pipe is connected with the horizontal well oil pipe. There is a sealing gasket at the connection position of the corrugated pipe and the horizontal well oil pipe, so that the sealing property can be ensured. The open side is fixed through a nut, so that the sliding or non-sealing condition can not occur in the stretching process. The sealing gasket is a prior art and will not be described here. The concentrated conveying pipe 28 is in communication with the conveying pipe 43 inside, so that the concentrated testing effect can be achieved.

[0031] The sealing ring 26 is made of ceramic material.

[0032] The horizontal well oil pipe is fixed on the fixed plate 20 and the fixed plate 21, and can be moved by the movement of the electric slide rail 23 and the electric slide rail 22. Due to the difference in moving speed between the electric slide rail 23 and the electric slide rail 22, the horizontal well oil pipe body can be stretched, so that the stretching test can be completed. At the same time, one end of the horizontal well oil pipe is in contact with the variable speed pipe 25, the sealing ring 26 can enter the inside of the horizontal well oil pipe, and the sealing ring 26 is in close contact with the inner wall of the horizontal well oil pipe. The taper of the variable speed pipe 25 can accelerate the above-mentioned gas or high-chlorine salt water reaching this position, so that the above-mentioned gas and high-chlorine salt water with different flow rates in the use process of the horizontal well oil pipe can be simulated. At the same time, due to the existence of the stepped gap at the connection position of the variable speed pipe 25 and the horizontal well oil pipe, the high-chlorine salt water or the above-mentioned gas reaching this position will be disturbed to cause the occurrence of turbulence, so that the real use condition of the horizontal well oil pipe can be simulated further, the testing precision effect can be achieved, and the sealing ring 26 can adapt to the curved surface structure of the tapered variable speed pipe 25, so that the sealing ring 26 is closely attached to the contact surface. The first sealing ring 26 bears the main impact pressure, and the subsequent sealing ring 26 bears the residual pressure, so that the effect of dispersing the sealing pressure can be achieved, the sealing effect in the testing process can be achieved, and the testing stability and safety effect can be achieved. The multi-stage and sequentially arranged anti-skid strips 27 can prevent the pipeline from slipping, ensure the stability and precision of the stretching process, and also can protect the surface of the pipeline to avoid damage during clamping, so that the testing process stability effect can be achieved.

[0033] As Figure 1 - Figure 14As shown, the magnet 411 is provided above the conveying pipe 43, the conveying pipe 43 is internally provided with a blocking mechanism 6, the blocking mechanism 6 comprises a second spring 61 and a telescopic rod 62 arranged in the second spring 61, the upper ends of the second spring 61 and the telescopic rod 62 are fixedly connected with a blocking block 63, the lower ends of the second spring 61 and the telescopic rod 62 are fixedly connected with the inner wall of the conveying pipe 43, and the conveying pipe 43 is in communication with the inside of the centralized conveying pipe 28.

[0034] The magnet is fixedly installed on the lower side of the blocking block 63, compared with the mode that the whole blocking block 63 is a magnet, the mode of arranging the magnet on the lower side of the blocking block 63 can avoid that the impurities in the high-chloride salt water are adsorbed by the magnet to cause blockage and lead to the operation jam of the blocking mechanism 6, therefore the whole blocking block 63 cannot be a magnet, only the lower side is a magnet, and meanwhile the accurate attraction of the magnet 411 can be ensured, the conveying pipe 43 is U-shaped, and the second spring 61 and the telescopic rod 62 are located at one end of the conveying pipe 43 close to the circulating mechanism 4.

[0035] The magnet on the lower side of the blocking block 63 is attracted to the magnet 411 and can approach the magnet 411, the pulling force generated by the attraction force can extrude the telescopic rod 62, so that the second spring 61 performs a compression action, and meanwhile the telescopic rod 62 performs a compression action, the blocking block 63 enters the inside of the lower side of the conveying pipe 43, when the magnet 411 is away from the blocking block 63, the attraction force of the magnet 411 disappears, the second spring 61 performs an unfolding action, and the blocking block 63 can enter the inside of the conveying pipe 43 again to block the conveying pipe 43, the arrangement of the blocking block 63 can control the conveying of the high-chloride salt water or gas of the conveying pipe 43, and the accuracy of the conveying of the gas or the high-chloride salt water during the test is ensured.

[0036] As shown in the figure, Figure 1 - Figure 14 The rotating rod 42 is rotatably connected with the inner wall of the rotating disc 45, the supporting blocks 41 are two and are symmetrically distributed, one end of the rotating rod 42 extends to the inside of the supporting block 41, and the other end of the rotating rod 42 extends to the outside of the other supporting block 41.

[0037] The surface on one side of the driving wheel 44 is fixedly connected with the output shaft of the motor 9, and the motor 9 is fixedly connected with the outside of the test main body 1.

[0038] The sliding grooves 419 are arranged on the opposite sides of the inner wall of the circulating bin 40, the sliding rods 49 are fixedly installed on the two sides of the moving block 412, one end of the sliding rod 49 is slidably connected with the inner wall of the sliding groove 419, and the sliding rod 49 is two groups, each group has two sliding rods.

[0039] The limiting grooves 415 are two groups, each group has two limiting grooves, the first springs 414 and the limiting balls 418 are two and are arranged in an upper-lower distribution mode.

[0040] The rotating disc 45 is rotatably connected to one side of the supporting block 41, and the other rotating disc 45 is rotatably connected to the inner wall of the circulating bin 40, and the inner walls of the two rotating discs 45 are rotatably connected to the circumferential side of the rotating rod 42, so that the rotating rod 42 can move and rotate, at the same time, the sliding rods 49 on both sides of the moving block 412 are in sliding connection with the sliding grooves 419 of the circulating bin 40, which can support and limit the movement of the moving block 412, avoid the rotation of the moving block 412, cause the unstable operation of the plugging mechanism 6, and the symmetrically distributed sliding rods 49 can balance the lateral force of the moving block 412 during movement, prevent the inclination or deviation of the moving block 412, ensure the smooth sliding of the moving block 412 along the preset track, and ensure the accuracy during the reciprocating movement of the circulating test.

[0041] As shown in Figure 1 - Figure 14 The weighing mechanism 3 includes a weighing table 33 and a weighing sensor 32 fixedly connected to the upper surface of the weighing table 33, and the upper end of the weighing sensor 32 is provided with a fixing frame 31.

[0042] The artificial picking method is used to place the measured horizontal well tubing on the fixing frame 31 in turn, at this time the weighing sensor 32 is subjected to pressure, and the weight of the horizontal well tubing can appear on the display screen on the weighing table 33, and compared with the traditional mechanical lever type weighing mechanism, the weighing sensor 32 can measure accurately and stably.

[0043] As shown in Figure 1 - Figure 14 The length of the rotating drum 413 is less than the distance between the two rotating discs 45, and the meshing teeth two 417 are meshingly connected with the meshing teeth one 416.

[0044] The length of the rotating drum 413 can ensure the sliding space of itself between the two rotating discs 45, and at the same time, when one of the meshing teeth two 417 and the meshing teeth one 416 are meshed, the other meshing teeth two 417 and the meshing teeth one 416 maintain a certain distance, so that the mis-meshing does not occur, thereby ensuring the accurate rotating direction of the rotating rod 42.

[0045] As shown in Figure 1 - Figure 14 Figure 1 Figure 14 Figure 1 Figure 14 Figure 1 Figure 14 Figure 1 Figure 14 Figure 1 Figure 14 Figure 1 Figure 14 Figure 1 Figure 14 Figure 1 The gas-liquid treatment tank 5 and the conveying tank 7 are fixedly installed on the inner wall of the mounting groove 8, and the conveying tank 7 is fixedly connected with the lower end of the conveying pipe 43 and is in internal communication.

[0046] The gas-liquid treatment tank 5 can collect and store the tested gas or high-chlorine salt water, and the conveying tank 7 can provide the required gas and high-chlorine salt water for the test.

[0047] Working principle: when carrying out horizontal well tubing corrosion resistance test, first, the area of horizontal well tubing is measured, then the horizontal well tubing is placed on the fixed frame 31, the weight of the horizontal well tubing can be obtained through the action of the weighing sensor 32, then the horizontal well tubing is placed on the fixed plate one 20 and the fixed plate two 21, the fixed plate one 20 and the electric sliding rail one 22 start to run, the variable speed pipe 25 enters the inside of the horizontal well tubing, at this time, the PLC control module 10 controls the motor 9 to run, the driving wheel 44 rotates, the rotating disc 45 rotates, the rotating cylinder 413 rotates, the rotating rod 42 rotates, the moving block 412 moves, the magnet 411 attracts the blocking block 63, the telescopic rod 62 contracts, the second spring 61 contracts, the blocking block 63 moves, the blocking block 63 unblocks the conveying pipe 43, the PLC control module 10 controls the motor 9 to stop running, the moving block 412 stops moving, after a period of time, the PLC control module 10 controls the motor 9 to continue to rotate, the moving block 412 moves again, the magnet 411 moves away from the blocking block 63, the telescopic rod 62 expands, the second spring 61 expands, the blocking block 63 moves, the blocking block 63 blocks the conveying pipe 43 again, when the conveying pipe 43 contacts with the spring 48, the spring 48 contracts, the conveying pipe 43 stops moving, the rotating rod 42 moves, the limiting ball 418 moves out of the limiting groove 415, the first spring 414 contracts, the limiting ball 418 enters another limiting groove 415, the first spring 414 expands, the meshing tooth two 417 meshes with another meshing tooth one 416, the rotating rod 42 reverses, so as to complete reciprocating movement and cycle test.

[0048] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent substitutions or changes to the technical scheme and the inventive concept of the present application within the technical scope disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A horizontal well oil pipe corrosion resistance testing device, comprising a testing body (1), and a weighing mechanism (3) fixedly connected to the upper surface of the testing body (1), characterized in that: A stretching mechanism (2) is provided near the top of the test body (1), a mounting slot (8) is provided on the rear side of the test body (1) below the stretching mechanism (2), a circulation mechanism (4) is provided inside the mounting slot (8), a motor (9) is provided on one side of the circulation mechanism (4), and a PLC control module (10) is fixedly installed on the surface of one side of the test body (1); The circulation mechanism (4) includes a circulation chamber (40) and a driving wheel (44) built into one side of the circulation chamber (40). The driving wheel (44) is meshedly connected with two symmetrically distributed turntables (45). The opposite inner sides of the two turntables (45) are fixedly provided with meshing teeth (416). A rotating drum (413) is provided between the two turntables (45). Both ends of the rotating drum (413) are provided with meshing teeth (417). A rotating rod (42) is fixedly installed through the rotating drum (413). The middle circumference of the rotating rod (42) is provided with a thread (46). The circumference of the rotating rod (42) is located at both ends of the thread (46) and is rotatably connected to two symmetrically distributed turntables (45). The fixed blocks (47) are distributed, and springs (48) are fixedly installed on opposite sides of the two fixed blocks (47). The surface of the thread (46) is threadedly connected to a moving block (412), one end of the moving block (412) is fixedly connected to a magnet (411), the end of the rotating rod (42) is rotatably connected to the moving cylinder (410), a limiting groove (415) is provided on the circumference of the moving cylinder (410), and the circumference of the limiting groove (415) is slidably connected to the support block (41), a first spring (414) is provided inside the support block (41), one end of the first spring (414) is rotatably connected to the limiting ball (418), and the limiting ball (418) is slidably connected to the limiting groove (415).

2. A horizontal well oil pipe corrosion resistance testing device according to claim 1, characterized in that: The stretching mechanism (2) includes two symmetrically distributed fixed plates (20) and an electric slide rail (22) fixedly connected to the lower ends of the two fixed plates (20). Two symmetrically distributed fixed plates (21) are provided on one side of the fixed plate (20). The lower ends of the two fixed plates (21) are fixedly connected to the electric slide rail (23). Anti-slip strips (27) are fixedly installed on the inner walls of the upper halves of the fixed plates (20) and the fixed plates (21). A diversion bin (24) is provided between the two fixed plates (21). Conical speed change tubes (25) are fixedly installed on both sides of the diversion bin (24). A sealing ring (26) is fixedly installed on the peripheral side of the speed change tube (25). A centralized delivery pipe (28) is fixedly installed on one side of the diversion bin (24).

3. The horizontal well oil pipe corrosion resistance testing device according to claim 2, characterized in that: A delivery tube (43) is provided above the magnet (411), and a blocking mechanism (6) is provided inside the delivery tube (43). The blocking mechanism (6) includes a second spring (61) and a telescopic rod (62) provided inside the second spring (61). The upper ends of the second spring (61) and the telescopic rod (62) are fixedly connected to a blocking block (63), and the lower ends of the second spring (61) and the telescopic rod (62) are fixedly connected to the inner wall of the delivery tube (43), and the delivery tube (43) is communicated with the interior of the centralized delivery tube (28).

4. The horizontal well oil pipe corrosion resistance testing device according to claim 1, characterized in that: The rotating rod (42) is rotatably connected to the inner wall of the rotating disk (45). There are two supporting blocks (41) that are symmetrically distributed. One end of the rotating rod (42) extends to the inside of the supporting block (41), and the other end of the rotating rod (42) extends to the outside of the other supporting block (41).

5. The horizontal well oil pipe corrosion resistance testing device according to claim 1, characterized in that: The weighing mechanism (3) comprises a weighing platform (33) and a weighing sensor (32) fixedly connected to the upper surface of the weighing platform (33), wherein a fixing frame (31) is provided at the upper end of the weighing sensor (32).

6. The horizontal well oil pipe corrosion resistance testing device according to claim 1, characterized in that: One side surface of the driving wheel (44) is fixedly connected to the output shaft of the motor (9), and the motor (9) is fixedly connected to the outer side of the test body (1).

7. The horizontal well oil pipe corrosion resistance testing device according to claim 1, characterized in that: Slide grooves (419) are provided on opposite sides of the inner wall of the circulation bin (40), and slide rods (49) are fixedly installed on both sides of the moving block (412). One end of the slide rod (49) is slidably connected to the inner wall of the slide groove (419), and the slide rods (49) are divided into two groups, with two in each group.

8. The horizontal well oil pipe corrosion resistance testing device according to claim 1, characterized in that: The limiting grooves (415) are in two groups, with two in each group; the first springs (414) and the limiting balls (418) are in two groups, and are distributed vertically.

9. The horizontal well oil pipe corrosion resistance testing device according to claim 1, characterized in that: The length of the rotating drum (413) is smaller than the distance between the two rotating disks (45), and the second meshing tooth (417) is meshedly connected with the first meshing tooth (416).

10. The horizontal well oil pipe corrosion resistance testing device according to claim 3, characterized in that: A gas-liquid processing box (5) and a delivery box (7) are fixedly mounted on the inner wall of the mounting groove (8); the delivery box (7) is fixedly connected to the lower end of the delivery pipe (43) and is internally communicated with the delivery pipe (43).

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