CN212272159U - Corrosion monitoring device - Google Patents
Corrosion monitoring device Download PDFInfo
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- CN212272159U CN212272159U CN201922120604.0U CN201922120604U CN212272159U CN 212272159 U CN212272159 U CN 212272159U CN 201922120604 U CN201922120604 U CN 201922120604U CN 212272159 U CN212272159 U CN 212272159U
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- 238000005260 corrosion Methods 0.000 title claims abstract description 35
- 230000007797 corrosion Effects 0.000 title claims abstract description 35
- 238000012806 monitoring device Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 86
- 238000004519 manufacturing process Methods 0.000 claims abstract description 55
- 239000007789 gas Substances 0.000 claims description 70
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 36
- 239000003345 natural gas Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The application discloses corrosion monitoring device belongs to gas well exploitation technical field. The corrosion monitoring device that this application embodiment provided includes: a casing head, a gas production tree and a monitoring assembly; the gas production tree is positioned above the casing head; the monitoring assembly is located in a connecting flange group of the gas production tree side passage, and the connecting flange group is located between a first valve and a second valve of the gas production tree side passage. When the monitoring assembly is installed, the third valve of the main channel of the gas production tree does not need to be closed, namely, the well does not need to be closed for pressure relief, the first valve of the side channel of the gas production tree only needs to be closed, the second valve is opened, the operation is simple and easy, the production process and the service life of a target gas well cannot be influenced, and the single-well opening time rate is improved.
Description
Technical Field
The application relates to the technical field of gas well exploitation. In particular to a corrosion monitoring device.
Background
In the process of gas well exploitation, the produced natural gas is mainly methane and also comprises other impurity gases which may corrode underground equipment, so that the corrosion condition of the underground equipment needs to be monitored, and corresponding measures are taken according to the corrosion condition of the underground equipment. And the process of installing the corrosion monitoring device underground is complex, and underground accidents are easily caused, so that in practical application, the corrosion monitoring device is mainly installed at a wellhead, and the corrosion condition of underground equipment is reflected by the corrosion condition of the corrosion monitoring device at the wellhead.
In the related technology, the corrosion condition of underground equipment is judged mainly by monitoring the corrosion condition of the hanging piece in a corrosion monitoring device of a wellhead. The monitoring hanging piece is positioned in a four-way valve of a main channel of the gas production tree and is cuboid in shape. When the monitoring hanging piece is installed, the valve of the main channel of the gas production tree needs to be closed, other valves of the gas production tree are opened to release pressure, and after the pressure release is completed, the monitoring hanging piece is installed.
However, when the monitoring hanging piece is installed in the related art, the pressure relief must be closed. The well closing and pressure relief can not only cause the fluctuation of the production parameters of the gas well and influence the production process, but also influence the service life of the gas well.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a corrosion monitoring device, and when the monitoring assembly is installed, the production process of a target gas well cannot be influenced, and the single-well opening time rate is improved. The specific technical scheme is as follows:
an embodiment of the present application provides a corrosion monitoring device, the device includes: a casing head, a gas production tree and a monitoring assembly;
the gas production tree is positioned above the casing head;
the monitoring assembly is positioned in a connecting flange group of the gas production tree side passage, and the connecting flange group is positioned between a first valve and a second valve of the gas production tree side passage;
when the monitoring assembly is installed, the second valve and the third valve of the main gas production tree passage are both in an opening state, and the first valve is in a closing state.
In one possible implementation, the monitoring component includes: a monitoring rod and a connecting component;
the monitoring rod with coupling assembling can dismantle the connection.
In another possible implementation, the connection assembly includes: a first connection assembly and a second connection assembly;
the monitoring rod with the connection can be dismantled to first coupling assembling, first coupling assembling with the connection can be dismantled to the second coupling assembling.
In another possible implementation, the detachable connection is a threaded connection.
In another possible implementation, the monitoring rod is cylindrical in shape.
In another possible implementation manner, the difference between the length of the monitoring rod and the 1/2 drift diameter of the pipeline where the connecting flange group is located is within a preset range.
In another possible implementation manner, the monitoring rod is perpendicular to the pipeline where the connecting flange group is located.
In another possible implementation manner, the first connecting assembly is a connecting head;
the second connecting assembly is a sealing cap.
In another possible implementation manner, the material of the monitoring rod is the same as that of the oil pipe in the target gas well.
In another possible implementation manner, the monitoring rod is made of stainless steel.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
the corrosion monitoring device that this application embodiment provided includes: a casing head, a gas production tree and a monitoring assembly; the gas production tree is positioned above the casing head; the monitoring assembly is located in a connecting flange group of the gas production tree side passage, and the connecting flange group is located between a first valve and a second valve of the gas production tree side passage. When the monitoring assembly is installed, the third valve of the main channel of the gas production tree does not need to be closed, namely, the well does not need to be closed for pressure relief, the first valve of the side channel of the gas production tree only needs to be closed, the second valve is opened, the operation is simple and easy, the production process and the service life of a target gas well cannot be influenced, and the single-well opening time rate is improved.
Drawings
FIG. 1 is a schematic view of a corrosion monitoring apparatus provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a corrosion monitoring apparatus provided in the related art;
FIG. 3 is a schematic view of a monitoring assembly provided in an embodiment of the present application;
fig. 4 is a top view of a monitoring assembly provided in an embodiment of the present application.
The reference numerals denote:
11-casing head, 12-gas production tree, 13-monitoring component, 121-connecting flange group, 122-first valve,
123-a second valve, 124-a third valve, 131-a monitoring rod, 132-a connecting component,
1321-a first connection assembly, 1322-a second connection assembly.
Detailed Description
In order to make the technical solutions and advantages of the present application more clear, the following describes the embodiments of the present application in further detail.
An embodiment of the present application provides a corrosion monitoring device, referring to fig. 1, the device includes: casing head 11, gas production tree 12 and monitoring assembly 13;
the gas production tree 12 is positioned above the casing head 11;
the monitoring assembly 13 is positioned in a connecting flange group 121 of the gas production tree 12 side passage, and the connecting flange group 121 is positioned between a first valve 122 and a second valve 123 of the gas production tree 12 side passage;
when the monitoring assembly 13 is installed, the second valve 123 and the third valve 124 of the main passage of the gas production tree 12 are both in an open state, and the first valve 122 is in a closed state.
The casing head 11 is arranged above a target gas well and communicated with the target gas well; the gas production tree 12 is positioned above the casing head 11 and communicated with the casing head 11; the monitoring assembly 13 is located in the gas production tree 12 side passage and communicates with the gas production tree 12. And the horizontal distance between the first valve 122 and the main passageway of the gas tree 12 is smaller than the horizontal distance between the second valve 123 and the main passageway of the gas tree 12, i.e. the first valve 122 is closer to the main passageway of the gas tree 12 than the second valve 123.
Two sides of the main passage of the gas production tree 12 are respectively provided with a side passage, the monitoring assembly 13 can be installed in one side passage, the other side passage is connected with a natural gas conveying pipeline, and the produced natural gas is conveyed out through the natural gas conveying pipeline.
It should be noted that the monitoring hanging piece in the related art is located in a four-way valve of the main passage of the gas production tree 12, and is shaped like a rectangular parallelepiped, see fig. 2. Since the pressure in the target gas well is high, the third valve 124 of the main passage needs to be closed and the pressure is released when the monitoring hanger is installed in the related art. Wherein the third valve 124 is used to control the opening and closing of the target gas well. However, the well closing and pressure relief can cause the fluctuation of the production parameters of the gas well, influence the production process and the service life of the gas well and cause the loss of natural gas resources. In addition. The replacement of the corrosion coupon needs to be completed by engaging with a professional, which causes part of the cost and economic loss.
The corrosion monitoring device provided by the embodiment of the application does not need to close the third valve 124 of the main passage of the gas production tree 12, namely does not need to close the well to relieve the pressure, only needs to close the first valve 122 of the side passage of the gas production tree 12 and open the second valve 123 when the monitoring component 13 is installed, is simple and easy to operate, does not influence the production process of a target gas well, and improves the well opening rate of a single well. The operation can be completed by common operators without hiring professionals, and the loss can be reduced.
After the monitoring assembly 13 is installed, the second valve 123 is closed, the first valve 122 is opened, the produced natural gas enters the natural gas conveying pipeline through the main passages of the casing head 11 and the gas production tree 12, and the produced natural gas is conveyed through the natural gas conveying pipeline. And the gas can diffuse, when the first valve 122 is in an open state and the second valve 123 is in a closed state, the natural gas can diffuse to the second valve 123 through the first valve 122, at this time, other impurity gases in the natural gas can corrode the monitoring assembly 13 located between the first valve 122 and the second valve 123, and related personnel can know the corrosion condition of the downhole equipment through the corrosion condition of the monitoring assembly 13. Wherein the other impurity gases are mainly high-content carbon dioxide gas.
Introduction of the monitoring assembly 13: in one possible implementation, referring to fig. 3, the monitoring component 13 includes: a monitoring lever 131 and a connecting assembly 132;
the monitoring lever 131 and the connecting assembly 132 are detachably connected.
The detachable connection mode can be set and changed according to needs, and is not particularly limited in the embodiment of the present application. For example, the detachable connection may be a threaded connection.
Introduction of the monitoring lever 131: in a possible implementation manner, the shape of the monitoring rod 131 may be set and changed as needed, and in the embodiment of the present application, this is not particularly limited. For example, the monitoring lever 131 may have a cylindrical shape. The cylindrical monitoring rod 131 is similar to the shape of the downhole oil pipe, so that the corrosion condition of the oil pipe in the well can be reflected more accurately.
In a possible implementation manner, the length of the monitoring rod 131 can be set and changed as required, and in the embodiment of the present application, the difference between the length of the monitoring rod 131 and the 1/2 drift diameter of the pipeline where the connecting flange group 121 is located is within a preset range. For example, the length of the monitoring rod 131 is the same as the length of the 1/2 path of the pipe in which the set of attachment flanges 121 is located. Alternatively, the length of the monitoring rod 131 is less than the 1/2 path length of the conduit by a difference of 2mm to 3 mm. Alternatively, the length of the monitoring rod 131 is greater than the 1/2 path length of the conduit by a difference of 1mm and 2 mm.
In one possible implementation, when the monitoring rod 131 is in the shape of a cylinder, the diameter of the cross-section of the cylinder can be sized and modified as desired, for example, the diameter can be 3mm, 4mm, or 8 mm. In the embodiments of the present application, this is not particularly limited.
In one possible implementation, the pipe on which the connecting flange set 121 is located is a pipe parallel to the horizontal plane, and the monitoring rod 131 is a rod perpendicular to the horizontal plane, so that the monitoring rod 131 and the pipe on which the connecting flange set 121 is located are perpendicular.
In one possible implementation, the material of the monitoring rod 131 can be set and changed as desired. In the embodiments of the present application, this is not particularly limited. For example, the material of the monitoring rod 131 is the same as that of the oil pipe in the target gas well, so that the corrosion condition of the oil pipe in the well can be known through the corrosion condition of the monitoring rod 131.
In one possible implementation, the monitoring rod 131 is made of stainless steel. The stainless steel grade may be P110, N80 or T95. In the embodiments of the present application, this is not particularly limited.
Introduction of the connection assembly 132: in one possible implementation, the connection assembly 132 includes: a first connection assembly 1321 and a second connection assembly 1322;
the monitoring rod 131 is removably coupled to the first coupling assembly 1321 and the first coupling assembly 1321 is removably coupled to the second coupling assembly 1322.
The detachable connection between the monitoring rod 131 and the first connection assembly 1321 may be the same as or different from the detachable connection between the first connection assembly 1321 and the second connection assembly 1322. In the embodiments of the present application, this is not particularly limited.
When the two connection modes are the same, the detachable modes can be both threaded connection.
In one possible implementation, the first connection assembly 1321 and the second connection assembly 1322 can be arranged and modified as desired. In the embodiment of the present application, the first connecting component 1321 may be configured as a connector, and the second connecting component 1322 may be configured as a sealing cap. Wherein, the connector can be a male buckle connector, and the sealing cap can be a grease injection sealing cap. When the first connecting component 1321 is a connecting head and the second connecting component 1322 is a sealing cap, with continued reference to fig. 3, a top view thereof can be seen in fig. 4.
In the embodiment of the application, when the corrosion condition of the underground equipment is reflected through the corrosion condition of the monitoring component 13, the monitoring component 13 can be taken out periodically, the quality of the monitoring component 13 is analyzed, and the corrosion rate is determined according to the ratio of the quality difference of the front and the back of the monitoring component 13 to the original quality of the monitoring component 13, so that the corrosion rate of the underground equipment is obtained, and the purpose of monitoring without shutting down the well is achieved. In addition, the corrosion monitoring device provided by the embodiment of the application is tested for two years, and the well closing and pressure relief operation is not carried out for 85 times of use, so that a better effect is achieved. In addition, the average single well reduces the cost loss by 2.5 ten thousand yuan, the accumulated cost loss is reduced by more than 212 ten thousand yuan, and the economic loss is reduced.
The corrosion monitoring device that this application embodiment provided includes: casing head 11, gas production tree 12 and monitoring assembly 13; the gas production tree 12 is positioned above the casing head 11; the monitoring assembly 13 is located within a set of connecting flanges 121 of the gas tree 12 side passage, the set of connecting flanges 121 being located between a first valve 122 and a second valve 123 of the gas tree 12 side passage. When the monitoring assembly 13 is installed, the third valve 124 of the main passage of the gas production tree 12 does not need to be closed, namely, the well is not needed to be closed and the pressure is relieved, the first valve 122 of the side passage of the gas production tree 12 only needs to be closed, the second valve 123 is opened, the operation is simple and easy, the production process and the service life of a target gas well are not affected, and the well opening time rate of a single well is improved.
The above description is only for facilitating the understanding of the technical solutions of the present application by those skilled in the art, and is not intended to limit the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. A corrosion monitoring device, the device comprising: a casing head, a gas production tree and a monitoring assembly;
the gas production tree is positioned above the casing head and communicated with the casing head;
the casing head is arranged above a target gas well and communicated with the target gas well;
two sides of the main passage of the gas production tree are respectively provided with a side passage, the monitoring assembly is positioned in a connecting flange group of the side passage of the gas production tree, the connecting flange group is positioned between a first valve and a second valve of the side passage of the gas production tree, and the other side passage of the gas production tree is connected with a natural gas conveying pipeline;
the monitoring assembly includes: a monitoring rod and a connecting component; the monitoring rod is detachably connected with the connecting component;
the monitoring rod is cylindrical;
the connecting assembly includes: a connector and a sealing cap;
the monitoring rod is detachably connected with the connector, and the connector is detachably connected with the sealing cap;
when the monitoring rod, the connector and the sealing cap are installed, the second valve and a third valve of the main channel of the gas production tree are both in an open state, the first valve is in a closed state, natural gas produced from the target gas well enters a natural gas conveying pipeline through the casing head and the main channel of the gas production tree, and the produced natural gas is conveyed through the natural gas conveying pipeline;
the installation the monitoring rod the connector with behind the sealing cap, first valve with the third valve all is in the open mode, the second valve is in the closed condition, the natural gas warp first valve spreads to the second valve is right the monitoring rod causes the corruption.
2. The device of claim 1, wherein the detachable connection is a threaded connection.
3. The apparatus of claim 1, wherein the difference between the length of the monitoring rod and the 1/2 path diameter of the pipe in which the flange assembly is located is within a predetermined range.
4. The apparatus of claim 1, wherein the monitoring rod is perpendicular to the pipe in which the set of connection flanges is located.
5. The apparatus of claim 1 wherein the monitoring rod is of the same material as the tubing in the target gas well.
6. The device of claim 5, wherein the monitoring rod is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922120604.0U CN212272159U (en) | 2019-11-28 | 2019-11-28 | Corrosion monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922120604.0U CN212272159U (en) | 2019-11-28 | 2019-11-28 | Corrosion monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN212272159U true CN212272159U (en) | 2021-01-01 |
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| CN201922120604.0U Active CN212272159U (en) | 2019-11-28 | 2019-11-28 | Corrosion monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114517655A (en) * | 2021-12-27 | 2022-05-20 | 深圳市百勤石油技术有限公司 | Economic small-wellhead gas production tree system suitable for natural gas hydrate exploitation |
-
2019
- 2019-11-28 CN CN201922120604.0U patent/CN212272159U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114517655A (en) * | 2021-12-27 | 2022-05-20 | 深圳市百勤石油技术有限公司 | Economic small-wellhead gas production tree system suitable for natural gas hydrate exploitation |
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