CN114542053A - Oil field corrosion monitoring ring hanger and size determination method thereof - Google Patents
Oil field corrosion monitoring ring hanger and size determination method thereof Download PDFInfo
- Publication number
- CN114542053A CN114542053A CN202011329223.4A CN202011329223A CN114542053A CN 114542053 A CN114542053 A CN 114542053A CN 202011329223 A CN202011329223 A CN 202011329223A CN 114542053 A CN114542053 A CN 114542053A
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- hanging groove
- joint
- ring
- wall thickness
- ring hanging
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
Abstract
The invention provides a ring hanger for monitoring corrosion of an oil field and a size determination method thereof. The suspension ring device is connected with the underground oil pipe in series and comprises an inner joint and an outer joint, wherein the inner wall of the outer joint is provided with an inner step part, and an inner ring suspension groove is formed by the inner step part and one end of the inner joint in a surrounding manner; the outer wall of the inner joint is provided with an outer step part, and the outer step part and one end of the outer joint are encircled to form an outer ring hanging groove; the wall thickness of the inner ring hanging groove and the wall thickness of the outer ring hanging groove are both larger than that of the underground oil pipe, and the heights of the inner ring hanging groove and the outer ring hanging groove are selected according to the standard that the shape is suddenly changed and corrosion and cracking of the hanging ring device are avoided. The method for determining the size of the suspension loop device comprises the following steps: determining the size information of the inner joint according to the inner diameter and the wall thickness of the underground oil pipe; determining the size information of the outer joint according to the size information of the inner joint; and verifying whether the suspension loop device meets the stress requirement of the suspension loop device. The invention has the advantages of relieving stress concentration of the ring hanging device, avoiding corrosion cracking of the ring hanging device, avoiding failure of a pipeline and the like.
Description
Technical Field
The invention relates to the field of corrosion protection of oil and gas pipelines and equipment, in particular to a hanging ring device for corrosion monitoring of an oil field and a size determination method thereof.
Background
The downhole ring hanging method is characterized in that a test ring (comprising an inner ring and an outer ring) for corrosion monitoring is arranged on a specially designed ring hanging device, the ring hanging device is put into a shaft along with a downhole oil pipe during the operation of lifting a tubular column of an oil well, and is taken out along with the downhole oil pipe during the next operation, so that the corrosion condition of a medium on the oil pipe under the downhole working condition is qualitatively monitored and quantitatively calculated. The underground corrosion condition monitored by adopting the underground hanging ring technology is completely matched with the corrosion condition of an underground oil pipe, and the monitored corrosion data is real and reliable; meanwhile, the technology can monitor the internal corrosion condition of the underground oil pipe and the external annular hollow corrosion condition of the underground oil pipe, and has a good corrosion monitoring effect.
At present, the conventional suspension loop device only needs to meet the functional requirements of underground corrosion monitoring, and the potential safety hazard problem in actual service is not considered. Specifically, the suspension loop device is a fixed test loop, a groove is usually required to be machined on the suspension loop device, the groove of the suspension loop device is very easy to cause stress concentration under the action of tensile load caused by the gravity of the underground oil pipe, a local area is possibly even higher than yield strength, and the suspension loop device is easy to corrode and crack under the same corrosion environment as the underground oil pipe, so that the risk of pipeline failure is caused, particularly under the high-H condition2S partial pressure and other materials are more obvious in cracking sensitive environment, the potential safety hazard of production is large, the reliable and safe operation of underground corrosion monitoring cannot be guaranteed, and the economic loss is large.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hanging ring device for monitoring corrosion of an oil field and a size determination method thereof, wherein the hanging ring device is used for relieving stress concentration of the hanging ring device and avoiding corrosion cracking of the hanging ring device and failure of a pipeline.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a suspension loop device for corrosion monitoring of an oil field is connected with a down-hole oil pipe in series and comprises an inner joint and an outer joint which are sleeved with each other, wherein an inner step portion is arranged on the inner wall of the outer joint, and an inner ring suspension groove is formed by the inner step portion and one end of the inner joint in a surrounding mode; the outer wall of the inner joint is provided with an outer step part, and an outer ring hanging groove is formed by the outer step part and one end of the outer joint in a surrounding manner; the wall thickness of the inner ring hanging groove and the wall thickness of the outer ring hanging groove are both larger than that of the underground oil pipe, and the heights of the inner ring hanging groove and the outer ring hanging groove are selected according to the standard that the shape is suddenly changed and corrosion and cracking of the hanging ring device are avoided.
As a further improvement of the above technical solution:
the ratio of the wall thickness of the underground oil pipe to the wall thickness of the outer ring hanging groove is 1: 1.1 to 1.4; the ratio of the wall thickness of the outer ring hanging groove to the wall thickness of the outer step part is 1: 1.1 to 1.7.
The inner joint has an inner diameter equal to an inner diameter of the downhole tubing.
The outer surface of the outer joint is flush with the outer surface of the outer step part; the outer ring hanging groove is internally provided with an outer ring, and the thickness of the outer ring is equal to the height of the outer ring hanging groove.
The outer joint has an outer diameter equal to an outer diameter of the outer step, and the inner step has an inner diameter equal to an inner diameter of the inner joint.
The ratio of the wall thickness of the inner ring hanging groove to the wall thickness of the inner step part is 1: 1.1 < 1.3.
An inner surface of the inner joint is flush with an inner surface of the inner step; an inner ring is installed in the inner ring hanging groove, and the thickness of the inner ring is equal to the height of the inner ring hanging groove.
The included angles between the bottom surfaces and the side surfaces of the inner ring hanging groove and the outer ring hanging groove are arc angles for relieving stress concentration.
The radius of the arc angle is equal to the height of the inner ring hanging groove or the outer ring hanging groove.
The method for determining the size of the oil field corrosion monitoring looper comprises the following steps:
(1) according to the inner diameter and the wall thickness of the underground oil pipe and the dimensional proportional relation between the underground oil pipe and the inner joint, determining the dimensional information of the inner joint inner diameter, the wall thickness of the outer ring hanging groove and the wall thickness of the outer step part;
(2) according to the inner diameter of the inner joint, the wall thickness of the outer ring hanging groove and the wall thickness of the outer step portion, determining the size information of the inner diameter of the outer joint, the wall thickness of the inner ring hanging groove and the wall thickness of the inner step portion by utilizing the size proportional relation of the inner joint and the outer joint;
(3) and verifying whether the maximum stress of the inner wall of the suspension loop device is smaller than the stress of the underground oil pipe or not, and if so, meeting the stress requirement of the suspension loop device.
Compared with the prior art, the invention has the advantages that:
the inner ring hanging groove and the outer ring hanging groove are arranged inside and outside the hanging ring device, and the wall thicknesses of the inner ring hanging groove and the outer ring hanging groove are both larger than the wall thickness of the underground oil pipe, namely the wall thicknesses of the inner ring hanging groove and the outer ring hanging groove are increased, so that the stress at the hanging ring device hanging groove is larger than the stress of the underground oil pipe, the problem that the stress level is lower than that of the underground oil pipe after the hanging ring device is arranged in the hanging groove is solved, and the hanging ring device is not easy to corrode and crack under the same corrosion environment as the underground oil pipe; meanwhile, the heights of the inner ring hanging groove and the outer ring hanging groove are selected according to the standard of controlling shape mutation and avoiding corrosion and cracking of the hanging ring device, namely the invention avoids the stress concentration phenomenon caused by overhigh height and overlarge shape mutation of the hanging groove by controlling the heights of the hanging grooves, ensures the reliable installation of the inner ring and the outer ring, and simultaneously reduces the heights of the inner ring hanging groove and the outer ring hanging groove as much as possible so as to control the shape mutation and reduce the stress concentration.
According to the invention, the maximum stress of the inner wall of the ring hanging device is effectively reduced to be lower than the stress of the underground oil pipe through the size limitation of the wall thickness and the height of the inner ring hanging groove and the outer ring hanging groove, so that the stress concentration phenomenon of the ring hanging device in service is effectively relieved, the corrosion cracking and pipeline failure risks of the ring hanging device are reduced, the loss is reduced, the reliable and safe operation of underground corrosion monitoring is ensured, and the field corrosion monitoring requirement of an oil field is met.
Meanwhile, the method for determining the size of the ring hanging device has the advantages, the size of the ring hanging device is connected with the underground oil pipe, the size information of the inner joint of the ring hanging device is determined according to the size information of the underground oil pipe, the size information of the outer joint is determined according to the size information of the inner joint, the size determination method is simple and convenient, stress concentration can be effectively reduced through size limitation of the ring hanging device, and the method can be widely applied to the underground environment of the oil field with high corrosion cracking risk.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a cross-sectional view of a hanger for oilfield corrosion monitoring of the present invention.
FIG. 2 is a flow chart of a method for determining the size of a looper for oilfield corrosion monitoring according to the present invention.
The reference numerals in the figures denote:
1. an inner joint; 11. an outer step portion; 12. an outer ring hanging groove; 2. an outer joint; 21. an inner step portion; 22. an inner ring hanging groove; 3. a circular arc angle; 4. an outer ring; 5. an inner ring.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the invention.
As shown in fig. 1, the hitching apparatus for monitoring corrosion in an oil field of this embodiment is connected in series with a downhole tubing and is lowered into and taken out of the downhole tubing. The oil field corrosion monitoring ring hanging device comprises an inner joint 1 and an outer joint 2 which are mutually sleeved. Wherein, the inner wall of the outer joint 2 is provided with an inner step part 21, the inner step part 21 and one end of the inner joint 1 are enclosed to form an inner ring hanging groove 22 so as to play a role of fixedly installing the inner ring 5; the outer wall of the inner joint 1 is provided with an outer step part 11, and an outer ring hanging groove 12 is formed by the outer step part 11 and one end of the outer joint 2 in a surrounding manner so as to play a role of fixedly installing the outer ring 4.
In this embodiment, the wall thicknesses of the inner ring hanging groove 22 and the outer ring hanging groove 12 are both greater than the wall thickness of the downhole oil pipe, that is, the wall thicknesses of the inner ring hanging groove 22 and the outer ring hanging groove 12 are increased, so that the stress at the inner ring hanging groove 22 and the outer ring hanging groove 12 is greater than the stress of the downhole oil pipe, the problem that the stress level is lower than that of the downhole oil pipe after the hanging ring device is arranged in the hanging groove is solved, and the hanging ring device is not easy to corrode and crack under the same corrosion environment as the downhole oil pipe. Meanwhile, the heights of the inner ring hanging groove 22 and the outer ring hanging groove 12 are selected according to the standard of controlling shape mutation and avoiding corrosion cracking of a hanging ring device, namely the invention avoids the stress concentration phenomenon caused by overhigh height and overlarge shape mutation of the hanging groove by controlling the heights of the hanging grooves, and reduces the heights of the inner ring hanging groove 22 and the outer ring hanging groove 12 to the greatest extent while ensuring the reliable installation of the inner ring 5 and the outer ring 4 so as to control the shape mutation and reduce the stress concentration.
According to the invention, the maximum stress of the inner wall of the ring hanging device is effectively reduced to be lower than the stress of an underground oil pipe by limiting the wall thickness and the height of the inner ring hanging groove 22 and the outer ring hanging groove 12, so that the stress concentration phenomenon of the ring hanging device in service is effectively relieved, the corrosion cracking and pipeline failure risks of the ring hanging device are reduced, further the loss is reduced, the reliable and safe operation of underground corrosion monitoring is ensured, and the field corrosion monitoring requirement of an oil field is met.
Further, the ratio of the wall thickness of the downhole oil pipe to the wall thickness of the outer ring hanging groove 12 is 1: 1.1-1.4, so that the wall thickness of the external hanging groove 12 is increased under the condition that the oil wellhead is in a certain size, and the larger the wall thickness is, the better the stress concentration is eliminated. The ratio of the wall thickness of the outer ring hanging groove 12 to the wall thickness of the outer step portion 11 is 1: 1.1-1.7, the height difference between the outer ring hanging groove 12 and the outer step part 11 is minimized while ensuring the reliable installation of the outer ring 4, namely, the smaller the height of the outer ring hanging groove 12 is, the smaller the stress concentration is.
In this embodiment, the inner diameter of nipple 1 is equal to the inner diameter of the downhole tubing. So that the liquid in the suspension loop device and the underground oil pipe can flow stably, the change of the flow speed of the liquid in the suspension loop device is avoided from influencing the underground corrosion monitoring, and the accuracy of a corrosion monitoring result is ensured; meanwhile, the inner diameter of inner joint 1 is equal to the inner diameter of the underground oil pipe, so that the size of the inner diameter of inner joint 1 can be quickly determined, and further, the determination of other dimension information of inner joint 1 is facilitated.
Further, the outer surface of the outer joint 2 is flush with the outer surface of the outer step portion 11; the outer ring 4 is arranged in the outer ring hanging groove 12, and the thickness of the outer ring 4 is equal to the height of the outer ring hanging groove 12. After the outer ring 4 is arranged in the outer ring hanging groove 12, the outer surface of the outer ring 4, the outer step portion 11 and the outer surface of the outer joint 2 form a parallel and level overflowing surface, so that the problem that the corrosion monitoring is influenced by the change of the flow speed of fluid at the outer ring 4 when the outer ring 4 protrudes or is lower than the outer ring hanging groove 12 is avoided, and the accuracy of a downhole corrosion monitoring result is effectively guaranteed.
As shown in fig. 1, the outer diameter of the outer joint 2 is equal to the outer diameter of the outer step 11, so that the looper can enter the well smoothly; the internal diameter of interior step portion 21 equals with the internal diameter of nipple 1, equals with the internal diameter of oil pipe in the pit promptly, and it makes the inside liquid steady flow of link ware and oil pipe in the pit, avoids inside liquid velocity of flow to change and influences corrosion monitoring in the pit, guarantees the accuracy of corrosion monitoring result. Meanwhile, the size relationship between the outer joint 2 and the inner joint 1 can conveniently and quickly confirm the size information of the outer joint 2 through the size information of the inner joint 1.
Further, the ratio of the wall thickness of the inner ring hanging groove 22 to the wall thickness of the inner step portion 21 is 1: 1.1 < 1.3. While ensuring reliable mounting of the inner ring 5, the difference in height between the inner ring retaining groove 22 and the inner step portion 21 is minimized, i.e., the smaller the height of the inner ring retaining groove 22, the smaller the stress concentration.
In the present embodiment, the inner surface of the nipple 1 is flush with the inner surface of the inner step 21; the inner ring hanging groove 22 is internally provided with an inner ring 5, and the thickness of the inner ring 5 is equal to the height of the inner ring hanging groove 22. After the inner ring 5 is arranged in the inner ring hanging groove 22, the inner surface of the inner ring 5, the inner step part 21 and the inner surface of the inner joint 1 form a flush flow surface, so that the problem that the corrosion monitoring is influenced by the change of the flow speed of fluid at the inner ring 5 when the inner ring 5 protrudes or is lower than the inner ring hanging groove 22 is solved, and the accuracy of the underground corrosion monitoring result is effectively ensured. In this embodiment, the inner step portion 21 is an annular step portion.
As shown in fig. 1, further, the included angles between the bottom surfaces and the side surfaces of the inner ring hanging groove 22 and the outer ring hanging groove 12 are arc angles 3, and the stress concentration phenomenon is effectively relieved by the arrangement of the arc angles 3. In this embodiment, the radius of the arc angle 3 is equal to the height of the inner ring hanging groove 22 or the outer ring hanging groove 12, so as to further alleviate the stress concentration at the positions of the inner ring hanging groove 22 and the outer ring hanging groove 12.
As shown in fig. 2, the method for determining the size of the looper for oilfield corrosion monitoring according to the embodiment includes the following steps:
(1) according to the inner diameter and the wall thickness of the underground oil pipe and the dimensional proportional relation between the underground oil pipe and the inner joint 1, determining the dimensional information of the inner diameter of the inner joint 1, the wall thickness of the outer ring hanging groove 12 and the wall thickness of the outer step part 11;
(2) determining the size information of the inner diameter of the outer joint 2, the wall thickness of the inner ring hanging groove 22 and the wall thickness of the inner step 21 by utilizing the size proportional relation of the inner joint 1 and the outer joint 2 according to the inner diameter of the inner joint 1, the wall thickness of the outer ring hanging groove 12 and the wall thickness of the outer step 11;
(3) and verifying whether the maximum stress of the inner wall of the suspension loop device is smaller than the stress of the underground oil pipe or not, and if so, meeting the stress requirement of the suspension loop device.
The method for determining the size of the ring hanging device has the advantages that the size of the ring hanging device is connected with the underground oil pipe, the size information of the inner joint 1 of the ring hanging device is determined according to the size information of the underground oil pipe, the size information of the outer joint 2 is determined according to the size information of the inner joint 1, the size determination method is simple and convenient, stress concentration can be effectively reduced through size limitation of the ring hanging device, and the method can be widely applied to the underground environment of an oil field with high corrosion cracking risk.
In a specific embodiment, the method for determining the size of the hanger for monitoring the corrosion of the oil field comprises the following steps:
(1) measuring to obtain that the inner diameter of the underground oil pipe is 75.9mm and the outer diameter is 95.25 mm; the wall thickness of the downhole oil pipe is calculated to be (95.25-75.9) ÷ 2 ═ 9.675mm according to the inner diameter and the outer diameter of the downhole oil pipe.
(2) The wall thickness of the outer ring hanging groove 12 is calculated to be 9.675 multiplied by 1.24 to 12.00mm according to the wall thickness of the oil pipe in the well. The inner diameter of the inner step portion 21 and the inner diameter of the inner joint 1 are the same as the inner diameter of the down hole tubing, and are both 75.9mm, and the outer diameter of the outer ring hanging groove 12 is 75.90+12.00 × 2, which is 99.90 mm.
(3) The wall thickness of the outer step portion 11 is 12 × 1.58 to 18.96mm, and the outer diameter of the outer step portion 11 is 75.90+18.96 × 2 to 113.82mm, which is determined by the wall thickness of the outer ring hooking groove 12.
(4) The outer diameter of the outer joint 2 is equal to the outer diameter of the outer step portion 11, and is 113.82mm, and the thickness of the inner step portion 21 is (113.82-75.9)/(2) 18.96mm, which is obtained from the outer diameter of the outer joint 2.
(5) The wall thickness of the inner ring retaining groove 22 is 18.96 ÷ 1.17 ÷ 16.20mm, and the inner diameter of the inner ring retaining groove 22 is 113.82-16.20 × 2 ═ 81.42mm, depending on the wall thickness of the inner step portion 21.
(6) The arc radius of the inner ring hanging groove 22 and the inner step part 21 is 18.96-16.20-2.76 mm; the arc radius of the outer ring hanging groove 12 and the outer step part 11 is 18.96-12.00-6.96 mm.
(7) According to the obtained size information of the suspension loop device, verification is carried out through finite element analysis, the maximum stress of the inner wall of the suspension loop device is smaller than the stress of the oil pipe, and the stress concentration problem of the suspension loop device is effectively relieved.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A ring hanger for monitoring oilfield corrosion is connected with a downhole oil pipe in series and is characterized by comprising an inner joint and an outer joint which are sleeved with each other, wherein the inner wall of the outer joint is provided with an inner step part, and an inner ring hanging groove is formed by the inner step part and one end of the inner joint in a surrounding manner; the outer wall of the inner joint is provided with an outer step part, and an outer ring hanging groove is formed by the outer step part and one end of the outer joint in a surrounding manner; the wall thickness of the inner ring hanging groove and the wall thickness of the outer ring hanging groove are both larger than that of the underground oil pipe, and the heights of the inner ring hanging groove and the outer ring hanging groove are selected according to the standard that the shape is suddenly changed and corrosion and cracking of the hanging ring device are avoided.
2. The oilfield corrosion monitoring collar of claim 1, wherein a ratio of a wall thickness of the downhole tubing to a wall thickness of the outer annular hanging groove is 1: 1.1 to 1.4; the ratio of the wall thickness of the outer ring hanging groove to the wall thickness of the outer step part is 1: 1.1 to 1.7.
3. The oilfield corrosion monitoring collar of claim 1, wherein an inner diameter of the nipple is equal to an inner diameter of the downhole tubing.
4. The oilfield corrosion monitoring bail of any one of claims 1-3, wherein an outer surface of the outer joint is flush with an outer surface of the outer step portion; the outer ring hanging groove is internally provided with an outer ring, and the thickness of the outer ring is equal to the height of the outer ring hanging groove.
5. The oilfield corrosion monitoring collar of any one of claims 1 to 3, wherein the outer joint has an outer diameter equal to an outer diameter of the outer step and the inner step has an inner diameter equal to an inner diameter of the inner joint.
6. The oilfield corrosion monitoring bail of claim 5, wherein a ratio of the wall thickness of the inner ring catching groove to the wall thickness of the inner step portion is 1: 1.1 < 1.3.
7. The oilfield corrosion monitoring bail of claim 5, wherein an inner surface of the nipple is flush with an inner surface of the inner step portion; an inner ring is installed in the inner ring hanging groove, and the thickness of the inner ring is equal to the height of the inner ring hanging groove.
8. The oilfield corrosion monitoring bail device of any one of claims 1 to 3, wherein the included angles between the bottom surfaces and the side surfaces of the inner and outer ring catching grooves are both arc angles that relieve stress concentration.
9. The oilfield corrosion monitoring bail of claim 8, wherein the radius of the radiused corner is equal to the height of the inner or outer annulus catching grooves.
10. The method for determining the size of the oil field corrosion monitoring looper according to claims 1 to 9, comprising the steps of:
(1) according to the inner diameter and the wall thickness of the underground oil pipe and the dimensional proportional relation between the underground oil pipe and the inner joint, determining the dimensional information of the inner joint inner diameter, the wall thickness of the outer ring hanging groove and the wall thickness of the outer step part;
(2) according to the inner diameter of the inner joint, the wall thickness of the outer ring hanging groove and the wall thickness of the outer step portion, determining the size information of the inner diameter of the outer joint, the wall thickness of the inner ring hanging groove and the wall thickness of the inner step portion by utilizing the size proportional relation of the inner joint and the outer joint;
(3) and verifying whether the maximum stress of the inner wall of the suspension loop device is smaller than the stress of the underground oil pipe or not, and if so, meeting the stress requirement of the suspension loop device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329223.4A CN114542053A (en) | 2020-11-24 | 2020-11-24 | Oil field corrosion monitoring ring hanger and size determination method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329223.4A CN114542053A (en) | 2020-11-24 | 2020-11-24 | Oil field corrosion monitoring ring hanger and size determination method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114542053A true CN114542053A (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011329223.4A Pending CN114542053A (en) | 2020-11-24 | 2020-11-24 | Oil field corrosion monitoring ring hanger and size determination method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114542053A (en) |
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2020
- 2020-11-24 CN CN202011329223.4A patent/CN114542053A/en active Pending
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