CN112629428A - Device for accurately arranging fiber grating sensors in oil production pipeline - Google Patents
Device for accurately arranging fiber grating sensors in oil production pipeline Download PDFInfo
- Publication number
- CN112629428A CN112629428A CN202011370639.0A CN202011370639A CN112629428A CN 112629428 A CN112629428 A CN 112629428A CN 202011370639 A CN202011370639 A CN 202011370639A CN 112629428 A CN112629428 A CN 112629428A
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- pipeline
- square
- flexible body
- positioning flexible
- hoop
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- 239000000835 fiber Substances 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 239000003292 glue Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a device for accurately arranging a fiber grating sensor in a production pipeline, which belongs to the technical field of pipeline monitoring and comprises the following components: the positioning flexible body and the tightening hoop are arranged on the positioning flexible body; the positioning flexible body is provided with two square through holes, and the center distance of the two square through holes meets the condition that the angle of two fiber bragg grating sensors which are respectively installed through the square through holes on the pipeline is 90 degrees; the tightening hoop is of a hoop structure and can ensure that two fiber bragg grating sensors are arranged on the same circumferential section of the pipeline. The device can conveniently, quickly and accurately install the fiber grating sensor on the cavity-making pipeline and can be reused, so that the fiber grating strain sensor can be quickly and accurately distributed on the cavity-making pipeline, the installation period is shortened, and the monitoring precision of the deformation of the tubular column is improved.
Description
Technical Field
The invention belongs to the technical field of pipeline monitoring, and particularly relates to a device for accurately arranging a fiber grating sensor in a production pipeline.
Background
The underground salt cavern gas storage is used for storing natural gas by dissolving salt with water to form cavities. The underground salt caverns have the complex environmental problems of large temperature change, high pressure, strong electromagnetic interference and the like. In the cavity-making process, many factors such as rock stratum collapse, brine crystallization and flow velocity can cause the dangerous situations such as deformation and fracture of pipelines, so that the cavity-making fails, and property loss and safety accidents are brought. Therefore, the pipeline needs to be monitored, the bending shape of the pipeline is obtained in real time, and the monitoring and early warning effects are achieved. The traditional electrical sensor is not suitable for working in the environment with high humidity and strong electromagnetic interference, so the passive and anti-electromagnetic interference optical fiber sensor is the best choice for realizing deformation monitoring in such a complex environment.
The monitoring and reconstruction principle of the bent shape of the pipeline is as follows: two fiber bragg grating strain sensors are arranged on the same horizontal section of the pipeline along the pipeline direction, the central angle of the two sensors relative to the section of the pipeline is 90 degrees, and the space curvature of the section can be obtained through conversion according to the linear relation between the strain and the curvature when the pipeline is bent. And fitting the curved shape of the pipeline by combining the space curvatures at different sections of the pipeline in a recursion manner based on a discrete point curvature fitting curve algorithm. Relevant researches show that the monitoring precision of the bending deformation of the pipeline is directly related to the installation precision and the quantity of the sensors, so that the number of the point distribution positions is large and the point distribution positions are accurate. The diameter of the injection cavity pipeline of the underground salt cavern is large, the interval angle between two sensors on the same horizontal section is difficult to accurately position, the arrangement quantity of the sensors is high, the field installation consumes long time, and the labor cost is high.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a device for accurately arranging the fiber grating sensor on the oil production pipeline, which can ensure that the fiber grating sensor can be conveniently, quickly and accurately installed on the cavity-making pipeline and can be repeatedly used, realize quick and accurate point distribution of the fiber grating strain sensor on the cavity-making pipeline, shorten the installation period and improve the monitoring precision of the deformation of the tubular column. The technical problem of accurate position arrangement and installation of the fiber bragg grating strain sensor on an underground deep pipeline is solved.
In order to achieve the above object, the present invention provides a device for accurately arranging fiber grating sensors in a production string, comprising: the positioning flexible body and the tightening hoop are arranged on the upper part of the positioning flexible body;
the positioning flexible body is provided with two square through holes, and the center distance of the two square through holes meets the condition that the angle of two fiber bragg grating sensors which are respectively installed through the square through holes on the pipeline is 90 degrees;
the tightening hoop is of a hoop structure and can ensure that two fiber bragg grating sensors are arranged on the same circumferential section of the pipeline.
In some alternative embodiments, the center distance L between the two square through holes is equal to one quarter of the circumference of the pipe.
In some alternative embodiments, the positioning flex is arcuate.
In some alternative embodiments, the positioning flexible body is a rubber flexible composite reinforced with abrasion resistant multi-axial warp knit fabric.
In some alternative embodiments, a through slot is formed on each of the upper and lower sides of each square through hole on the back surface of the positioning flexible body.
In some alternative embodiments, a back side provided with a groove is adhered with a double-sided adhesive tape for temporarily adhering the positioning flexible body to the pipe.
In some alternative embodiments, the positioning flexible body has a thickness of 3mm and the square through-hole has an aspect ratio of 3: 2.
in some alternative embodiments, the tightening strap includes a strap body and a tightening structure connecting the strap body.
In some alternative embodiments, the tightening structure comprises: the fishing platform leg is adjusted to tighten the screw, so that the hoop body is tightly attached to the pipeline and then fixed by the nut.
In some alternative embodiments, the hoop body is a thin sheet of nitinol.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
the two sensors are ensured on two buses with 90 degrees of the pipeline through the center distance of the square hole, and the two sensors are ensured on the same horizontal cross section of the pipeline 8 by tightening the tightening hoop 4. Meanwhile, the device can be quickly positioned and reused. Compared with manual positioning, the positioning precision is greatly improved, and the pipeline bending fitting precision is improved. The installation speed is also greatly improved, and especially when a large number of sensors are arranged and installed, the efficiency is remarkably improved. The simple programming operation greatly reduces the error installation operation.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary device for installing a fiber grating sensor in a pipeline according to an embodiment of the present invention;
FIG. 2 is a schematic view of the back of a positioning flexible body according to an embodiment of the present invention;
FIG. 3 is a schematic view of a use installation provided by an embodiment of the present invention;
in the figure: 1 is the location flexible body, 2 is right shape through-hole, 3 is the groove, 4 are tightening up the hoop, 5 are the nut, 6 are the screw, 7 are fishing platform legs, 8 are the pipeline, 9 are left shape through-hole, A is two quad slit center contained angles, L is two quad slit center length.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In order to realize rapid and accurate point distribution of the fiber grating sensor on the pipeline 8, the installation period of the sensor is shortened, and the monitoring precision of the deformation of the pipe column is improved. Fig. 1 is a schematic structural diagram of an auxiliary device for installing a fiber grating sensor in a pipeline according to an embodiment of the present invention. The whole device is a whole and comprises two main parts: positioning flexible body 1 and tightening band 4. The positioning flexible body 1 is provided with a right through hole 2 and a left through hole 9, and the square through hole is the placing position of the fiber grating sensor, so that the sensor can be conveniently injected with glue and fixed on a pipeline. The central distance between the two square through holes is the key for ensuring that the angle A of the two fiber bragg grating sensors is 90 degrees when the two fiber bragg grating sensors are installed on the pipeline. The principle is as follows: the central distance L of the two square through holes is equal to one fourth of the circumference of the pipeline, namely:
wherein L is the distance between the centers of the two square through holes, S is the circumference of the pipeline, and R is the radius of the pipeline.
Therefore, when the flexible body 1 is positioned to be closely attached to the pipe 8, the centers of the two square through holes of the right through hole 2 and the left through hole 9 are respectively located on two cylindrical generatrices forming an angle of 90 °, in which case, the sensor mounting position can be determined quickly and accurately. The positioning flexible body 1 has the characteristics of being bendable and not easy to stretch, so that the wear-resistant multi-axial warp knitted fabric reinforced rubber flexible composite material is selected. The high-strength high-elongation high-flexibility steel is characterized by high strength, low elongation and good flexibility, and meets the design requirement. As shown in FIG. 2, a through small groove 3 is respectively arranged on the upper and lower sides of the square through hole on the back surface of the positioning flexible body 1 for placing the optical fibers at the two ends of the fiber grating sensor, and simultaneously, the positioning flexible body also plays a role in assisting in fixing and preventing the sensor from inclining. Set up the back that has groove 3, be stained with the double faced adhesive tape, play the effect with the interim adhesion of the flexible body 1 of location and pipeline 8, prevent the slip of the flexible body 1 of location and lead to positioning error. In order to realize the optimal transfer efficiency of strain, the thickness of the positioning flexible body 1 is determined to be 3mm, and the length-width ratio of each square through hole is 3: and 2, the fixing glue is uniformly injected on the sensor, and the square through holes play a role in ensuring the consistency of the thickness of the glue.
Wherein, tighten up the effect that the hoop 4 mainly plays fixed to and ensure two sensors at same circumference cross-section, tighten up the hoop 4 and include the hoop body and tighten up the structure. The hoop body is made of nickel-titanium alloy thin sheets, and has the characteristic of no deformation after being bent for many times, so that the phenomena of stretching and twisting after repeated use are avoided. The tightening structure comprises a screw 6, a nut 5 and a fishing platform leg 7, the fishing platform leg 7 is adjusted to tighten the screw 6, the hoop body is tightly attached to the pipeline 8, and then the hoop body is fixed by the nut 5. By fine adjustment, the screw 6 is tightened to make the hoop body reach a minimum circumference state, which corresponds to the path of the hoop body being a horizontal circumferential section of the pipeline, so the positioning flexible body 1 connected with the hoop body is also in a horizontal circumferential section, which is the principle of ensuring that two sensors are in the same horizontal section.
As shown in fig. 3, the whole installation process is as follows: two fiber bragg grating strain sensors are respectively placed in the right through hole 2 and the left through hole 9, and optical fibers at two ends of the sensors are placed in the grooves 3. The whole device is attached to a pipeline 8, the fishing table legs 7 are adjusted to enable the hoop body of the nickel-titanium alloy body to be tightened and attached to the pipeline 8, the hoop body of the nickel-titanium alloy body is fixed through the nut 5, the hoop body of the nickel-titanium alloy body is finely adjusted, force is applied to the nut 5, and the tightening hoop 4 is tightened to achieve the state of the minimum circumference. After the integral positioning position is determined, the positioning flexible body 1 and the pipeline 8 are temporarily stuck and fixed by using a double-faced adhesive tape. And injecting glue into the fiber bragg grating sensor after the fixing, opening the tightening hoop 4 after the glue is fixedly formed, taking down the device, and replacing the device to another position to repeat the previous operation.
It should be noted that, according to the implementation requirement, each step/component described in the present application can be divided into more steps/components, and two or more steps/components or partial operations of the steps/components can be combined into new steps/components to achieve the purpose of the present invention.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A device for accurately arranging a fiber grating sensor in a production pipeline is characterized by comprising: the positioning flexible body and the tightening hoop are arranged on the upper part of the positioning flexible body;
the positioning flexible body is provided with two square through holes, and the center distance of the two square through holes meets the condition that the angle of two fiber bragg grating sensors which are respectively installed through the square through holes on the pipeline is 90 degrees;
the tightening hoop is of a hoop structure and can ensure that two fiber bragg grating sensors are arranged on the same circumferential section of the pipeline.
2. The apparatus of claim 1, wherein the center distance L between the two square through holes is equal to one quarter of the circumference of the pipe.
3. The device of claim 1 or 2, wherein the positioning flexible body is arcuate.
4. The device of claim 3, wherein the positioning flexible body is a rubber flexible composite reinforced with a wear resistant multi-axial warp knit fabric.
5. The device of claim 4, wherein a through slot is formed in each of the upper and lower sides of each square through hole on the back surface of the positioning flexible body.
6. The device according to claim 5, characterized in that the back of the groove is provided with double-sided adhesive for temporarily adhering the positioning flexible body to the pipe.
7. The apparatus of claim 6, wherein the square through-hole has an aspect ratio of 3: 2.
8. the device of claim 1, wherein the tightening clamp comprises a clamp body and a tightening structure connecting the clamp body.
9. The apparatus of claim 8, wherein the tightening structure comprises: the hoop body is tightly attached to the pipeline by adjusting the tightening screw of the fishing platform leg, and then the fishing platform leg is fixed by the nut.
10. The device of claim 8, wherein the band is a thin sheet of nitinol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370639.0A CN112629428A (en) | 2020-11-30 | 2020-11-30 | Device for accurately arranging fiber grating sensors in oil production pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370639.0A CN112629428A (en) | 2020-11-30 | 2020-11-30 | Device for accurately arranging fiber grating sensors in oil production pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112629428A true CN112629428A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011370639.0A Pending CN112629428A (en) | 2020-11-30 | 2020-11-30 | Device for accurately arranging fiber grating sensors in oil production pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112629428A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114963024A (en) * | 2022-04-11 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Monitoring device and detection system for oil and gas pipeline and installation method of detection system |
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| US20060045408A1 (en) * | 2004-08-27 | 2006-03-02 | Jones Martin P W | Structural member bend radius and shape sensor and measurement apparatus |
| US20060115335A1 (en) * | 2004-11-03 | 2006-06-01 | Allen Donald W | Apparatus and method for retroactively installing sensors on marine elements |
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| CN203337111U (en) * | 2013-07-25 | 2013-12-11 | 无锡市政设计研究院有限公司 | Hoop type optical fiber grating reinforcement meter |
| CN104374496A (en) * | 2014-11-07 | 2015-02-25 | 上海交通大学 | Jacket platform rod stress measurement sensor system and method |
| CN206132294U (en) * | 2016-09-27 | 2017-04-26 | 中建三局集团有限公司 | Harmless testing arrangement of instrument style concrete pump pipe pressure |
| CN107917784A (en) * | 2017-11-16 | 2018-04-17 | 武汉理工大学 | A kind of pipeline road Oil Leakage Detecting system and its method of work based on fiber grating |
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| CN110686612A (en) * | 2019-10-31 | 2020-01-14 | 大连理工大学 | Inclination measuring device and inclination measuring method based on shape sensor |
| CN111811438A (en) * | 2020-07-14 | 2020-10-23 | 山东科技大学 | Fully mechanized coal mining face horizontal control system and method |
| CN111811434A (en) * | 2020-06-30 | 2020-10-23 | 中国矿业大学 | Curvature sensing assembly, installation method of curvature sensing assembly and sensing system |
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2020
- 2020-11-30 CN CN202011370639.0A patent/CN112629428A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060045408A1 (en) * | 2004-08-27 | 2006-03-02 | Jones Martin P W | Structural member bend radius and shape sensor and measurement apparatus |
| US20060115335A1 (en) * | 2004-11-03 | 2006-06-01 | Allen Donald W | Apparatus and method for retroactively installing sensors on marine elements |
| CN201535705U (en) * | 2009-04-23 | 2010-07-28 | 大连理工大学 | Fiber bragg grating pipeline stress hoop |
| CN102141452A (en) * | 2011-01-04 | 2011-08-03 | 中国海洋石油总公司 | Riser stress measuring device and measuring method |
| CN203337111U (en) * | 2013-07-25 | 2013-12-11 | 无锡市政设计研究院有限公司 | Hoop type optical fiber grating reinforcement meter |
| CN104374496A (en) * | 2014-11-07 | 2015-02-25 | 上海交通大学 | Jacket platform rod stress measurement sensor system and method |
| CN206132294U (en) * | 2016-09-27 | 2017-04-26 | 中建三局集团有限公司 | Harmless testing arrangement of instrument style concrete pump pipe pressure |
| CN107917784A (en) * | 2017-11-16 | 2018-04-17 | 武汉理工大学 | A kind of pipeline road Oil Leakage Detecting system and its method of work based on fiber grating |
| CN109443425A (en) * | 2018-10-23 | 2019-03-08 | 南阳理工学院 | A kind of heat preservation conveyance conduit deformation of long range and leakage monitoring system |
| CN110686612A (en) * | 2019-10-31 | 2020-01-14 | 大连理工大学 | Inclination measuring device and inclination measuring method based on shape sensor |
| CN111811434A (en) * | 2020-06-30 | 2020-10-23 | 中国矿业大学 | Curvature sensing assembly, installation method of curvature sensing assembly and sensing system |
| CN111811438A (en) * | 2020-07-14 | 2020-10-23 | 山东科技大学 | Fully mechanized coal mining face horizontal control system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114963024A (en) * | 2022-04-11 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Monitoring device and detection system for oil and gas pipeline and installation method of detection system |
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Application publication date: 20210409 |
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