Corrosion monitoring device

Abstract

The utility model discloses corrosion monitoring equipment, including corrosion monitoring device and first connecting piece, corrosion monitoring equipment includes insulating shell, at least one for monitoring corrosion's sample to be measured, first fixed structure and the second fixed structure of setting corresponding each sample to be measured, the shell is the hollow structure of two end portions closed, and the upper side is equipped with a plurality of intercommunication holes, the sample to be measured is located the inside of shell and is fixed through the second fixed structure, and the intercommunication hole is connected with the outside in the inside of shell, the lateral surface of shell is equipped with the accommodation groove, and the first connecting piece part is located in the accommodation groove and is fixed through the first fixed structure. The porous insulating shell of the corrosion monitoring device can form flowing bin, can guarantee sample to be measured and outside fluid full contact, can prevent sample to be measured and shell contact and take place galvanic corrosion simultaneously, and corrosion monitoring effect is reliable. And, the corrosion monitoring equipment is integral type detachable structure, can be used repeatedly, saves manual and material cost.

Description

Technical Field

[0001] This utility model relates to the field of corrosion monitoring technology, and in particular to a corrosion monitoring device. Background Technology

[0002] In the oil and gas field sector, solid corrosion inhibitors are commonly used to protect structures such as the annulus of oil wells. To evaluate the effectiveness of solid corrosion inhibitors, a corrosion monitoring device is needed to assess or monitor the corrosion status of the oilfield production system. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a corrosion monitoring device, which addresses at least one defect in the related technologies mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a corrosion monitoring device, including a corrosion monitoring device and a first connector. The corrosion monitoring device includes an insulating shell, at least one test sample for monitoring corrosion, a first fixing structure, and a second fixing structure corresponding to each test sample.

[0005] The outer shell is a hollow structure with closed ends and multiple connecting holes on the sides; the sample to be tested is placed inside the outer shell and fixed by the second fixing structure, and the connecting holes connect the inside of the outer shell with the outside.

[0006] The outer casing has a receiving groove on its side, and the first connecting part is disposed in the receiving groove and fixed by the first fixing structure.

[0007] In some embodiments, the housing includes an insulating body and end caps detachably connected to both ends of the body;

[0008] Multiple connecting holes are provided on the side of the main body;

[0009] The side of the end cap and the side of the main body are respectively provided with axial U-shaped grooves in the circumferential position to form the receiving groove.

[0010] In some embodiments, the sample to be tested is a sheet-like or needle-like structure.

[0011] In some embodiments, the sample to be tested has a via;

[0012] The second fixing structure includes a pair of corresponding mounting holes on both sides of the housing, a second connector, and a locking element;

[0013] The second connector passes through the mounting hole on one side of the housing, the through hole on the sample to be tested, and the mounting hole on the other side of the housing. One end of the second connector is engaged in the mounting hole on one side of the housing, and the other end of the second connector protrudes from the other side of the housing. The other end of the second connector cooperates with the locking member to lock the sample to be tested inside the housing.

[0014] In some embodiments, the first fixing structure includes a binding member and a limiting member;

[0015] The binding member is arranged around the side of the outer shell, and the limiting member is located at both ends of the receiving groove and fixed to the first connecting member.

[0016] In some embodiments, the outer casing has a binding groove on its side, and the binding member is disposed within the binding groove.

[0017] In some embodiments, the first fixing structure includes a binding member and a limiting member;

[0018] The binding member surrounds the side of the housing, and the limiting member is located at both ends of the receiving groove and fixed to the first connecting member; the binding member covers at least part of the locking member and at least part of the mounting hole.

[0019] In some embodiments, the corrosion monitoring device further includes a counterweight located at the end of the first connector.

[0020] In some embodiments, the corrosion monitoring device further includes a suspension member for fixing to an external fastener, the suspension member having multiple holes for the corrosion monitoring device and the first connector to pass through.

[0021] In some embodiments, the corrosion monitoring device further includes a counterweight located at the end of the first connector.

[0022] By implementing this utility model, the following beneficial effects can be achieved:

[0023] The porous insulating shell of this corrosion monitoring device forms a flow chamber, ensuring full contact between the sample and the external fluid to simulate a corrosive environment. Simultaneously, it prevents galvanic corrosion caused by the sample contacting the shell, resulting in reliable corrosion monitoring. Furthermore, the corrosion monitoring device can be integrated into a detachable structure via a first and second fixing structure, facilitating disassembly, reusability, and saving labor and material costs. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0025] Figure 1 This diagram shows a structural diagram of an embodiment of the corrosion monitoring device and the first connecting member in the corrosion monitoring equipment of this utility model;

[0026] Figure 2 A cross-sectional view of an embodiment of the corrosion monitoring device in the corrosion monitoring equipment of this utility model is shown;

[0027] Figure 3 A structural diagram of one embodiment of the suspension component in the corrosion monitoring device of this utility model is shown;

[0028] Figure 4 A schematic diagram of one embodiment of the corrosion monitoring device, first connecting member, counterweight and suspension member in the corrosion monitoring equipment of this utility model is shown. Detailed Implementation

[0029] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "located in," and "located in" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections, mechanical connections or chemical connections, direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] like Figure 1 As shown, some embodiments of this utility model disclose a corrosion monitoring device that can be used for corrosion monitoring in environments such as oil well pipelines or oil well annulus. The corrosion monitoring device includes a corrosion monitoring unit 1 and a first connector 2. The device includes an insulating shell 11, at least one sample 12 for monitoring corrosion, a first fixing structure, and a second fixing structure corresponding to each sample 12. The number of second fixing structures is the same as the number of samples 12. It can be understood that at least one can be one, two, three, or any number, as detailed below:

[0034] The outer shell 11 is a hollow structure with closed ends and multiple connecting holes 1111 on the side. The sample 12 to be tested is placed inside the outer shell 11 and fixed by a second fixing structure. The connecting holes 1111 connect the inside of the outer shell 11 to the outside. The side of the outer shell 11 is provided with a receiving groove 1112. The first connecting member 2 is placed in the receiving groove 1112 and fixed by the first fixing structure.

[0035] In this embodiment, the porous insulating outer shell 11 of the corrosion monitoring device 1 can form a flow chamber, ensuring that the sample 12 under test is in full contact with the external fluid, simulating a corrosive environment. Simultaneously, it prevents galvanic corrosion caused by contact between the sample 12 and the outer shell 11, ensuring reliable corrosion monitoring. Furthermore, the corrosion monitoring device 1 can be integrated into a detachable structure through a first fixing structure and a second fixing structure, facilitating disassembly, reusability, and saving labor and material costs.

[0036] In addition, the two ends of the outer casing 11 are closed, which can ensure that the corrosion products of the sample 12 to be tested will not fall into the test environment (such as underground), and other media in the test environment will not fall into the interior of the outer casing 11.

[0037] In some embodiments, such as Figure 1 and Figure 4 As shown, the first connecting member 2 is a rope, with distance markers on the rope at regular intervals for easy recording of the descent distance. For example, the rope may be a stainless steel corrosion-resistant alloy cable. However, the use of stainless steel corrosion-resistant alloy cable here is merely an example and is not intended to limit this application; other types of cables may also be used.

[0038] In some embodiments, the corrosion monitoring device 1 includes at least two test samples 12, which are evenly spaced along the axial direction of the housing 11. Understandably, the at least two can be two, three, or any number.

[0039] In some embodiments, such as Figure 1The corrosion monitoring device 1 includes at least one set of test samples, each set of test samples including three test samples 12. The three test samples 12 are evenly spaced along the axial direction of the housing 11. Understandably, at least one set can be one set, two sets, three sets, or any number. When at least two sets of test samples are included, the at least two sets of test samples can also be evenly spaced along the axial direction of the housing 11.

[0040] In some embodiments, the number of first fixing structures is at least one; however, to improve fixation, there may be multiple structures. In other embodiments, such as... Figure 1 The number of the first fixed structures can also correspond to the number of the test samples 12.

[0041] In some embodiments, the entire housing 11 is made of an insulating material (such as polytetrafluoroethylene). In other embodiments, the insulating housing 11 is not required to be entirely made of insulating material, but rather its overall structure is functionally capable of providing the necessary insulating protection. Figure 1 As shown, the outer casing 11 includes an insulating body 111 and end caps 112 detachably connected to both ends of the body 111. Multiple connecting holes 1111 are provided on the side of the body 111. The side of the end caps 112 and the side of the body 111 are respectively provided with axial U-shaped grooves corresponding in the circumferential position to form a receiving groove 1112, that is, the receiving groove 1112 extends along the axial direction of the outer casing 11. The circumferential and axial directions mentioned throughout the text refer to the circumferential direction c and the axial direction a of the outer casing 11.

[0042] For example, the insulating body 111 is a cylinder made of polytetrafluoroethylene (PTFE) material, and the end cap 112 is a cap made of stainless steel material. The end cap 112 and the body 111 are sealed and fixed together by four M4 bolts. The PTFE, stainless steel and four M4 bolts mentioned here are just examples and are not intended to limit this application. Other materials may also be used.

[0043] In some embodiments, the sample 12 to be tested is a sheet-like or needle-like structure made of metallic or non-metallic materials, wherein the metallic or non-metallic materials are the same as the materials of the environment to be tested. For example, metallic materials are carbon steel (A3, 20#, 45#), stainless steel (304, 316L), brass (H59, H62), copper (T2 copper), aluminum, etc., and non-metallic materials are fiberglass, polyethylene, polypropylene, etc. The sheet shape is rectangular, etc. This is only an example and is not intended to limit this application. Other materials may also be used.

[0044] In some embodiments, such as Figure 2As shown, the sample 12 to be tested has a through hole 121, for example, the through hole 121 is located at the top. The second fixing structure includes a pair of corresponding mounting holes 1113 on both sides of the housing 11, a second connector 13, and a locking member (not shown). The second connector 13 passes through the mounting hole 1113 on one side of the housing 11, the through hole 121 on the sample 12 to be tested, and the mounting hole 1113 on the other side of the housing 11. One end of the second connector 13 is engaged in the mounting hole 1113 on one side of the housing 11, and the other end of the second connector 13 protrudes from the other side of the housing 11. The other end of the second connector 13 cooperates with the locking member to lock the sample 12 to be tested inside the housing 11.

[0045] For example, mounting hole 1113 is a hole with an internal step, second connector 13 is a bolt with a nut at one end, and locking element is a nut. When the bolt passes through mounting hole 1113 on one side of housing 11, through hole 121 on sample 12, and mounting hole 1113 on the other side of housing 11, the nut at one end engages with the step of mounting hole 1113, and the other end of the bolt is threaded into the nut on the other side of housing 11 for locking. It should be noted that the bolt and nut mentioned here are merely examples and are not intended to limit this application; other types are also possible.

[0046] In some embodiments, such as Figure 1 As shown, the first fixing structure includes a binding member 14 and a limiting member 15. The binding member 14 surrounds the side of the outer shell 11, and the limiting member 15 is located at both ends of the receiving groove 1112 and fixed to the first connecting member 2. For example, the binding member 14 is a strap, and the limiting member 15 is a clip. The strap and clip here are just examples and are not intended to limit this application. Other types are also possible.

[0047] When the first connector 2 (e.g., a rope) is placed in the receiving groove 1112, in order to restrict the first connector 2 from moving in the circumferential direction of the outer shell 11 within the receiving groove 1112, the first connector 2 can be tied by the binding member 14 (strap). At the same time, in order to restrict the first connector 2 from moving in the axial direction of the outer shell 11, it can be limited by the limiting members 15 (clamps) at both ends of the receiving groove 1112.

[0048] In some embodiments, for ease of binding, a binding groove 1114 is provided on the side of the housing 11, and the binding member 14 is arranged in the binding groove 1114. In some embodiments, the binding groove 1114 and the binding member 14 are located in the circumferential direction of the housing 11.

[0049] In some embodiments, to prevent the second connector 13 and the locking member from falling into the test environment due to loosening, the binding member 14 blocks at least part of the locking member and at least part of the mounting hole 1113. Understandably, "at least part" can be partial or complete.

[0050] In some embodiments, the structure of the connecting hole 1111 can be the same as that of the mounting hole 1113, and the connecting hole 1111 also corresponds on both sides of the housing 11.

[0051] In some embodiments, the inner diameter of the connecting hole 1111 on the outer shell 11 is 6mm, and it is symmetrically distributed 180 degrees around the outer shell 11. It should be noted that the 6mm and 180 degrees here are just examples and are not intended to limit this application. Others may also be used.

[0052] In some embodiments, the corrosion monitoring device also includes a roller (not shown) for fixing to an external fastener. The first connector 2 is a rope, and the suspension member 4 has the rope wound around the roller. The rope is released through the roller, thereby adjusting the lowering depth of the corrosion monitoring device 1.

[0053] In some embodiments, such as Figure 4 As shown, to ensure the verticality of the extension and retraction, the corrosion monitoring equipment also includes a counterweight 3. The counterweight 3 is located at the end of the first connecting member 2. For example, the counterweight is made of stainless steel. The weight of the counterweight 3 can be adjusted according to the lowering depth. Stainless steel is just an example and is not intended to limit this application. Other materials may also be used.

[0054] In some embodiments, such as Figure 3 As shown, the corrosion monitoring equipment also includes a suspension member 4, which is used to fix it to an external fastener. The suspension member 4 has multiple holes 41, which are respectively used for the corrosion monitoring device 1 and the first connecting member 2 to pass through. When the corrosion monitoring equipment is used for corrosion monitoring of oil well pipelines or oil well annulus, the suspension member 4 is fixed above the oil well pipeline or oil well annulus. The annulus refers to the annular space between the tubing string (such as casing, tubing) and the well wall or other tubing strings in the oil well. The holes 41 at the corresponding positions can be selected according to the position of the oil well pipeline or oil well annulus, allowing the corrosion monitoring device 1 and the first connecting member 2 to pass through and be lowered into the oil well pipeline or oil well annulus. For example, the suspension member 4 is a steel plate with multiple holes 41 along its length. The steel plate here is only an example and is not intended to limit this application; other types are also possible.

[0055] The specific steps are as follows:

[0056] First, the sample 12 to be tested is inserted into one end of the main body 111 and fixed inside the main body 111 with bolts and nuts. Then, the end caps 112 are installed. Next, part of the rope is placed into the receiving groove 1112, and after being fixed axially with clamps, it is fixed circumferentially with straps. After assembly, a counterweight 3 of a certain weight is installed at the end of the rope.

[0057] Finally, based on the location of the oil well pipeline or annulus, a suitable hole 41 is selected on the porous suspension component 4 to lower the corrosion monitoring device 1, the first connecting component 2, and the counterweight 3 into the well. The corrosion monitoring device 1 is set vertically, with the vertical direction being the axial direction of the outer casing 11. According to the distance markings on the rope, rollers are used to lower the rope to the determined lowering depth. After a period of time, the sample 12 to be tested can be taken out, and the corrosion rate can be calculated by measuring the corrosion status of the surface area or the weight loss, thus ultimately understanding the corrosion process and status of the oil well pipeline or annulus.

[0058] By implementing this utility model, the following beneficial effects can be achieved:

[0059] The porous insulating shell 11 of this corrosion monitoring device 1 forms a flow chamber, ensuring that the sample 12 under test is in full contact with the external fluid, simulating a corrosive environment. Simultaneously, it prevents galvanic corrosion caused by contact between the sample 12 and the shell 11, ensuring reliable corrosion monitoring. Furthermore, the corrosion monitoring device 1 can be integrated into a detachable structure through a first fixing structure and a second fixing structure, facilitating disassembly, reusability, and saving labor and material costs.

[0060] It is understood that the above embodiments only illustrate some implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can freely combine the above embodiments or technical features without departing from the concept of this utility model, and can also make several modifications and improvements, all of which fall within the protection scope of this utility model. That is, the embodiments described "in some embodiments" can be freely combined with any of the preceding and following embodiments. Therefore, all equivalent transformations and modifications made within the scope of the claims of this utility model should fall within the coverage of the claims of this utility model.

Claims

1. A corrosion monitoring device, characterized in that, The corrosion monitoring device includes a corrosion monitoring device (1) and a first connector (2). The corrosion monitoring device includes an insulating shell (11), at least one test sample (12) for monitoring corrosion, a first fixing structure, and a second fixing structure corresponding to each of the test samples (12). The outer shell (11) is a hollow structure with closed ends and multiple connecting holes (1111) on the side; the sample to be tested (12) is placed inside the outer shell (11) and fixed by the second fixing structure, and the connecting holes (1111) connect the inside of the outer shell (11) with the outside. The outer shell (11) has a receiving groove (1112) on its side, and the first connector (2) is partially disposed in the receiving groove (1112) and fixed by the first fixing structure.

2. The corrosion monitoring equipment according to claim 1, characterized in that, The outer casing (11) includes an insulating body (111) and end caps (112) detachably connected to both ends of the body (111); A plurality of the aforementioned connecting holes (1111) are provided on the side of the main body (111); The side of the end cap (112) and the side of the main body (111) are respectively provided with axial U-shaped grooves corresponding in the circumferential position to form the receiving groove (1112).

3. The corrosion monitoring equipment according to claim 1, characterized in that, The sample to be tested (12) has a sheet-like or needle-like structure.

4. The corrosion monitoring equipment according to claim 1, characterized in that, The sample to be tested (12) is provided with a through hole (121); The second fixing structure includes a pair of corresponding mounting holes (1113) on both sides of the housing (11), a second connector (13), and a locking element; The second connector (13) passes through the mounting hole (1113) on one side of the housing (11), the through hole (121) on the sample to be tested (12), and the mounting hole (1113) on the other side of the housing (11). One end of the second connector (13) is engaged in the mounting hole (1113) on one side of the housing (11), and the other end of the second connector (13) protrudes from the other side of the housing (11). The other end of the second connector (13) cooperates with the locking member to lock the sample to be tested (12) inside the housing (11).

5. The corrosion monitoring equipment according to claim 1, characterized in that, The first fixing structure includes a binding member (14) and a limiting member (15); The binding member (14) surrounds the side of the outer shell (11), and the limiting member (15) is located at both ends of the receiving groove (1112) and fixed to the first connecting member (2).

6. The corrosion monitoring equipment according to claim 5, characterized in that, The outer shell (11) has a binding groove (1114) on its side, and the binding member (14) is arranged in the binding groove (1114).

7. The corrosion monitoring equipment according to claim 4, characterized in that, The first fixing structure includes a binding member (14) and a limiting member (15); The binding member (14) surrounds the side of the outer shell (11), and the limiting member (15) is located at both ends of the receiving groove (1112) and fixed to the first connecting member (2); the binding member (14) covers at least part of the locking member and at least part of the mounting hole (1113).

8. The corrosion monitoring equipment according to claim 1, characterized in that, The corrosion monitoring device also includes a counterweight (3), which is located at the end of the first connector (2).

9. The corrosion monitoring equipment according to claim 1, characterized in that, The corrosion monitoring device also includes a suspension component (4), which is used to fix it to an external fastener. The suspension component (4) has multiple holes (41), which are used to allow the corrosion monitoring device (1) and the first connector (2) to pass through.

10. The corrosion monitoring equipment according to claim 1, characterized in that, The corrosion monitoring device also includes a counterweight (3), which is located at the end of the first connector (2).

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