CN114963024A - Monitoring device and detection system for oil and gas pipeline and installation method of detection system - Google Patents
Monitoring device and detection system for oil and gas pipeline and installation method of detection system Download PDFInfo
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- CN114963024A CN114963024A CN202210373492.3A CN202210373492A CN114963024A CN 114963024 A CN114963024 A CN 114963024A CN 202210373492 A CN202210373492 A CN 202210373492A CN 114963024 A CN114963024 A CN 114963024A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 9
- 238000009434 installation Methods 0.000 title abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 50
- 238000012544 monitoring process Methods 0.000 claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000004568 cement Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 19
- 239000002689 soil Substances 0.000 abstract description 10
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 230000008859 change Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 230000035882 stress Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013024 troubleshooting Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
Abstract
The invention discloses a monitoring device, a detection system and an installation method for an oil and gas pipeline in a soft soil area, wherein the detection device for settlement comprises the following components: the first fiber bragg grating sensor is fixedly arranged on the oil and gas pipeline and used for monitoring the settlement displacement deformation of the oil and gas pipeline; the test box is provided with a test cavity and is fixed on the oil-gas pipeline, so that the first fiber bragg grating sensor is accommodated in the test cavity; a monitoring device for injury comprising: and the second fiber bragg grating sensor is fixedly arranged on the oil and gas pipeline along the circumferential direction of the oil and gas pipeline and is used for monitoring the circumferential deformation of the oil and gas pipeline. The device has simple structure and low manufacturing cost, can be installed in high-risk soft soil areas in batches, and provides real-time settlement deformation and pipeline damage monitoring for pipelines in the areas.
Description
Technical Field
The invention relates to the field of oil and gas pipeline monitoring equipment, in particular to a monitoring device, a detection system and an installation method for an oil and gas pipeline in a soft soil area.
Background
Pipeline engineering plays an important role in the field of energy delivery nowadays, and once safety problems occur, immeasurable influence is caused on national economy and daily life of the masses. In addition, because oil gas transported in the pipeline has the characteristics of high pressure, flammability and explosiveness, the property safety of people and the surrounding environment can be seriously harmed when a disaster happens. Because the energy distribution of China is not uniform geographically, the oil-gas pipeline is used as a linear engineering and does not need to pass through certain areas with complex geological conditions, and soft soil is used as special soil with large water content, large porosity and high compressibility and can generate complex friction action on the pipeline when disturbed by load, excavation and the like, so that the pipeline is deformed or even damaged.
Therefore, deformation and damage monitoring of the buried oil and gas pipeline have important significance for normal operation of the pipeline, so that life quality of people and life and property safety are guaranteed.
Nowadays, monitoring technology for nondestructive settlement and damage of buried oil and gas pipelines is changing day by day. The oil and gas pipeline settlement monitoring mode mainly comprises excavation monitoring and settlement monitoring column monitoring.
The excavation monitoring has the defects that the pipeline is exposed in the air for a long time, the abrasion and the aging of the pipeline are aggravated, and the monitoring work is limited by weather factors such as rainfall and the like; although the settlement monitoring column mode can detect accurate pipeline settlement data in real time and does not need to expose the pipeline, the device can only realize the single function of monitoring settlement and cannot judge whether the section of pipeline is damaged or not.
The method for monitoring the damage of the oil and gas pipeline mainly adopts a negative pressure wave method, a flow balance method and the like, but the monitoring system with high cost only supports the installation of each monitoring substation, and when the distance between the pipelines of the two monitoring substations is overlarge, the damaged point cannot be accurately judged, so that the search investment is increased.
Disclosure of Invention
In order to solve the problems and requirements, the technical scheme provides the monitoring device for the oil and gas pipeline and the monitoring method thereof, and the technical purpose can be achieved due to the adoption of the following technical characteristics, and other multiple technical effects are brought.
One object of the present invention is to propose a monitoring device for an oil and gas pipeline, comprising:
the first fiber bragg grating sensor is fixedly arranged on the oil and gas pipeline and used for monitoring the settlement displacement deformation of the oil and gas pipeline;
and the test box is provided with a test cavity and fixed on the oil-gas pipeline, so that the first fiber grating sensor is accommodated in the test cavity.
In one example of the present invention, the method further comprises: the steel ring is fixed on the base plate,
it with the test box links, and along the axis direction of oil gas pipeline is fixed on the oil gas pipeline.
In one example of the present invention, the method further comprises: an anti-skid mat is arranged on the upper surface of the main body,
the non-slip mat is arranged between the fixed steel ring and the oil and gas pipeline.
In one example of the invention, the test cartridge is located at an upper end side of the oil and gas pipeline.
Another object of the invention is to propose a monitoring device for oil and gas pipelines, comprising:
and the second fiber bragg grating sensor is fixedly arranged on the oil and gas pipeline along the circumferential direction of the oil and gas pipeline and is used for monitoring the circumferential deformation of the oil and gas pipeline.
In one example of the present invention, the method further comprises: a clamp assembly, comprising:
the two ends of the first half clamping ring are respectively provided with a first positioning hole;
the two ends of the second half clamping ring are respectively provided with a second positioning hole;
the first half clamping ring and the second half clamping ring are matched to define a clamping cavity matched with the oil and gas pipeline together, and the second fiber bragg grating sensor is embedded in the first half clamping ring and the second half clamping ring respectively;
the first positioning hole corresponds to the second positioning hole.
It is a further object of the invention to propose a monitoring system for an oil and gas pipeline comprising:
the monitoring device is used for monitoring the settlement displacement deformation of the oil and gas pipeline;
the monitoring device is used for monitoring the circumferential deformation of the oil and gas pipeline;
a wire, one end of which is coupled with the first fiber bragg grating sensor and the other end of which extends to the ground surface;
the monitoring devices for the settlement displacement deformation are arranged at intervals along the extending direction of the oil and gas pipeline;
the monitoring devices of the circumferential deformation amount are arranged at intervals along the extending direction of the oil and gas pipeline and are in one-to-one correspondence and coupled with the monitoring devices of the settlement displacement deformation amount.
In one example of the present invention, the method further comprises: a cement substrate, wherein the cement substrate is a hollow cement substrate,
which is fixed to the ground surface and coupled to the other end of the lead wire.
In one example of the invention, the wire is a piece of rebar.
A further object of the present invention is to propose a method for installing a detection device for oil and gas pipelines, characterized in that it comprises the following steps:
s10: fixing a first fiber bragg grating sensor on an oil-gas pipeline and installing the first fiber bragg grating sensor into a test box;
s20: installing a second fiber grating sensor along the circumferential direction of the oil-gas pipeline, manufacturing two semi-annular first semi-clamping rings and a second semi-clamping ring according to the semi-circumference of the oil-gas pipeline, and connecting the two semi-annular first semi-clamping rings and the second semi-clamping rings to the oil-gas pipeline so that the second fiber grating sensor is fixed by a clamping cavity formed by the first semi-clamping ring and the second semi-clamping ring;
s30: selecting a lead with a proper length according to the embedding depth of the oil-gas pipeline, and coupling one end of the lead with a first fiber bragg grating sensor in the test cavity;
s40: after the embedding of the oil and gas pipeline is finished, the other end of the lead extends out of the ground surface, a cement substrate is arranged on the ground surface, and the other end of the lead is fixed in the cement substrate.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the invention and are not to be construed as limiting the invention to all embodiments thereof.
FIG. 1 is a schematic structural diagram of a settlement monitoring device for an oil and gas pipeline according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a damage monitoring device for an oil and gas pipeline according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a settlement and damage monitoring system for an oil and gas pipeline according to an embodiment of the invention.
List of reference numerals:
a monitoring system 1000;
an oil and gas pipeline 10;
a monitoring device 100 for oil and gas pipeline settlement;
a first fiber grating sensor 110;
a test cartridge 120;
a stationary steel ring 130;
a non-slip pad 140;
a monitoring device 200 for damage to an oil and gas pipeline;
a second fiber grating sensor 210;
a clamp assembly 220;
a first half clasp 221;
the first positioning hole 2211;
a second half snap ring 222;
the second positioning hole 2221;
a conductive line 300;
a cement base 400;
a ground surface 500.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
A monitoring device 100 for hydrocarbon pipeline settlement according to a first aspect of the present invention, as shown in fig. 1, comprises:
the first fiber bragg grating sensor 110 is fixedly arranged on the oil-gas pipeline 10 and used for monitoring the settlement displacement deformation of the oil-gas pipeline 10;
and the test box 120 is provided with a test cavity and is fixed on the oil and gas pipeline 10, so that the first fiber grating sensor 110 is accommodated in the test cavity.
The settling deformation principle of the oil and gas pipeline 10 is as follows: when the oil gas pipeline 10 deforms under the driving of the soft soil around the pipeline, an equality relation can be established between the strain capacity of the first fiber grating sensor 110 and the settlement displacement variation quantity of the oil gas pipeline 10 in the monitoring device, so that the simple pipeline displacement deformation monitoring is realized, and the method specifically comprises the following steps:
the pipeline settlement deformation displacement of the monitoring point is as follows:
d＝ε 1 ·L
wherein epsilon 1 The strain value is measured by the fiber grating sensor, and L is the gauge length of the fiber grating sensor;
therefore, the displacement and deformation of the pipe can be obtained by the first fiber grating sensor 110.
The first fiber grating sensor 110 is accommodated in the testing chamber, and is used for ensuring that the first fiber grating sensor 110 is not affected by the soil pressure and the pore water in the soft soil.
In one example of the present invention, the method further comprises: the fixing of the steel ring 130 is performed,
it is connected with the test box 120 and fixed on the oil and gas pipeline 10 along the axial direction of the oil and gas pipeline 10;
the test box 120 can be fixedly connected through the fixing steel ring 130, and the fixing mode has a simple structure and is safe and reliable.
In one example of the present invention, the method further comprises: the non-slip mat 140 is provided with,
the anti-slip pad 140 is arranged between the fixing steel ring 130 and the oil and gas pipeline 10;
the fixing stability of the test box 120 can be improved by arranging the anti-slip mat 140 between the fixing steel ring 130 and the oil and gas pipeline 10, so as to improve the measurement accuracy.
In an example of the present invention, the test box 120 is located at the upper end side of the oil and gas pipeline 10, so that the test box 120 is convenient to install, and damage to the test box 120 and the first fiber grating sensor 110 after the oil and gas pipeline 10 is settled can be avoided.
A monitoring device 200 for damage to an oil and gas pipeline according to a second aspect of the present invention, as shown in fig. 2, comprises:
the second fiber bragg grating sensor 210 is fixedly installed on the oil and gas pipeline 10 along the circumferential direction of the oil and gas pipeline 10 and is used for monitoring the circumferential deformation of the oil and gas pipeline 10;
the stress state when the oil and gas pipeline 10 operates is as follows:
annular stress of the oil and gas pipeline 10:
axial stress of the pipeline:
pipeline radial stress: sigma 3 ＝-P；
Wherein, P is the internal pressure of the oil and gas pipeline 10, C is the circumference of the oil and gas pipeline 10, and delta is the wall thickness of the oil and gas pipeline 10;
change of 10 circumferences of oil and gas pipelines:
wherein E is the elastic modulus of the pipe, v is PoissonRatio, epsilon 2 Strain values measured by a fiber grating sensor of the pipeline damage monitoring module;
carry-in sigma 1 And σ 2 The formula of the change amount of the circumference of the oil and gas pipeline 10 is as follows:
the variation of the circumference of the oil-gas pipeline 10 is realized by measuring the strain value of the second fiber grating sensor 210, and the second fiber grating sensor 210 and the oil-gas pipeline 10 are attached as much as possible, so that the variation of the circumference of the oil-gas pipeline 10 is the same as the variation measured by the second fiber grating sensor 210. The variation measured by the second fiber grating sensor 210 for pipeline damage is:
Δs＝ε 2 ·L
the formula of the change amount of the circumference of the oil-gas pipeline 10 and the change amount formula measured by the second fiber grating sensor 210 for pipeline damage are combined to obtain the internal pressure of the pipeline as follows:
according to the above theory, the pressure change inside the pipeline can be measured by the pipeline damage monitoring module, so as to monitor whether the pipeline is damaged.
In one example of the present invention, the method further comprises: a clamp assembly 220, comprising:
the first half snap ring 221, two ends of the first half snap ring 221 are respectively provided with a first positioning hole 2211;
the second half-clamping ring 222, two ends of the second half-clamping ring 222 are respectively provided with a second positioning hole 2221;
the first half snap ring 221 and the second half snap ring 222 are matched to define a snap cavity matched with the oil and gas pipeline 10, and the second fiber bragg grating sensor 210 is embedded in the first half snap ring 221 and the second half snap ring 222 respectively; for example, when the clamp assembly 220 is manufactured, a clamping groove may be respectively formed in the first half-clamping ring 221 and the second half-clamping ring 222 for embedding the second fiber grating sensor 210.
The first positioning hole 2211 corresponds to the second positioning hole 2221, and a fastener sequentially penetrates through the first positioning hole 2211 and the second positioning hole 2221;
because the variation of the circumference of the oil-gas pipeline 10 is realized by measuring the strain value of the second fiber grating sensor 210, the second fiber grating sensor 210 and the oil-gas pipeline 10 can be attached to each other as much as possible by the clamp assembly 220, so that the variation of the circumference of the oil-gas pipeline 10 is the same as the variation measured by the second fiber grating sensor 210.
Of course, a non-slip mat may be disposed between the clamp assembly 220 and the oil and gas pipeline 10, thereby improving the installation stability of the clamp assembly 220.
A monitoring system 1000 for an oil and gas pipeline according to a third aspect of the present invention, as shown in fig. 3, comprises:
the monitoring device for monitoring the settlement displacement deformation of the oil and gas pipeline 10 is as described above;
the monitoring device is used for monitoring the circumferential deformation of the oil and gas pipeline 10;
a wire 300 having one end coupled to the first FBG sensor 110 and the other end extending to the ground surface 500; the environment in which the wire 300 is used requires that it be sufficiently rigid and therefore metallic, for example, the wire 300 is a piece of rebar.
Wherein, the monitoring devices for the settlement displacement deformation are arranged at intervals along the extending direction of the oil and gas pipeline 10;
the monitoring devices for circumferential deformation are arranged at intervals along the extending direction of the oil and gas pipeline 10, and are in one-to-one correspondence and coupled with the monitoring devices for settlement displacement deformation;
the monitoring device 100 for hydrocarbon pipeline settlement can transmit signals monitoring displacement and deformation of the hydrocarbon pipeline 10 to the ground surface 500, the monitoring device 200 for hydrocarbon pipeline damage can transmit signals monitoring pressure change inside the hydrocarbon pipeline 10 to the ground surface 500, and the ground surface 500 is further provided with a computer processor coupled with the wire 300 for processing signals of the monitoring device.
A number of monitoring devices are installed at intervals on the oil and gas pipeline 10 in areas of more ergonomic activity. If only a certain part is slightly deformed, as shown in fig. 3, the deformation quantity displayed by the n-number and n + 1-number devices is the largest, the deformed part can be judged to be between the n-number and n + 1-number monitoring devices, early warning information can be provided for maintenance personnel, so that the pipeline section can be checked in time, whether maintenance needs to be implemented or not is judged, and loss can be found in advance and avoided.
If a certain part is only greatly deformed and the pipeline is damaged, as shown in fig. 3, the deformation quantity and the pressure variation quantity displayed by the n-number and n + 1-number devices are the largest, so that the deformed and damaged part can be judged to be between the n-number and n + 1-number monitoring devices, the purpose can be achieved, the troubleshooting time of maintenance personnel is greatly shortened, the fault can be removed as soon as possible, and the loss is reduced.
The device has simple structure and low manufacturing cost, can be installed in high-risk soft soil areas in batches, and provides real-time settlement deformation and pipeline damage monitoring for pipelines in the areas.
In one example of the present invention, the method further comprises: the cement base 400 is made of a cement material,
which is fixed to the ground surface 500 and coupled to the other end of the lead 300, thereby securing the position of the lead 300 on the ground surface 500.
A method of installing a test device for an oil and gas pipeline according to a fourth aspect of the present invention is characterized by comprising the steps of:
s10: fixing the first fiber grating sensor 110 on the oil and gas pipeline 10 and installing it into the test box 120;
s20: installing a second fiber grating sensor 210 along the circumferential direction of the oil and gas pipeline 10, manufacturing two semi-annular first semi-snap rings 221 and a second semi-snap ring 222 according to the semi-circumference of the oil and gas pipeline 10, and connecting the two semi-annular first semi-snap rings and the second semi-snap ring to the oil and gas pipeline 10, so that the second fiber grating sensor 210 is fixed by a clamping cavity formed by the first semi-snap rings 221 and the second semi-snap rings 222;
s30: selecting a lead 300 with a proper length according to the embedding depth of the oil and gas pipeline 10, and coupling one end of the lead 300 with the first fiber bragg grating sensor 110 in the test cavity;
s40: after the embedment of the oil and gas pipeline 10 is completed, the other end of the wire 300 is extended out of the ground surface 500, and a cement base 400 is provided on the ground surface 500, and the other end of the wire 300 is fixed in the cement base 400.
The monitoring devices are installed according to the steps, and a plurality of monitoring devices are installed on the pipeline of the area with stronger human engineering activities at certain intervals. If only a certain part is slightly deformed, as shown in fig. 3, the deformation quantity displayed by the n-number and n + 1-number devices is the largest, the deformed part can be judged to be between the n-number and n + 1-number monitoring devices, early warning information can be provided for maintenance personnel, so that the pipeline section can be checked in time, whether maintenance needs to be implemented or not is judged, and loss can be found in advance and avoided.
If a certain part is only greatly deformed and the pipeline is damaged, as shown in fig. 3, the deformation quantity and the pressure variation quantity displayed by the n-number and n + 1-number devices are the largest, so that the deformed and damaged part can be judged to be between the n-number and n + 1-number monitoring devices, the purpose can be achieved, the troubleshooting time of maintenance personnel is greatly shortened, the fault can be removed as soon as possible, and the loss is reduced.
The device has simple structure and low cost, can be installed in high-risk soft soil areas in batches, and provides real-time settlement deformation and pipeline damage monitoring for pipelines in the areas.
In the foregoing, exemplary embodiments of the monitoring device for oil and gas pipelines and the monitoring method thereof proposed by the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes may be made to the specific embodiments described above and various combinations of the technical features and structures proposed by the present invention may be made without departing from the concept of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. A monitoring device for an oil and gas pipeline, comprising:
the first fiber bragg grating sensor (110) is fixedly arranged on the oil-gas pipeline (10) and used for monitoring the settlement displacement deformation of the oil-gas pipeline (10);
the test box (120) is provided with a test cavity and is fixed on the oil and gas pipeline (10), so that the first fiber grating sensor (110) is accommodated in the test cavity.
2. A monitoring device for oil and gas pipelines according to claim 1,
further comprising: a fixed steel ring (130),
which is connected with the test box (120) and is fixed on the oil and gas pipeline (10) along the axial direction of the oil and gas pipeline (10).
3. A monitoring device for oil and gas pipelines according to claim 2,
further comprising: a non-slip mat (140),
the anti-skid pad (140) is arranged between the fixing steel ring (130) and the oil and gas pipeline (10).
4. A monitoring device for oil and gas pipelines according to claim 1,
the test box (120) is located on the upper end side of the oil and gas pipeline (10).
5. A monitoring device for an oil and gas pipeline, comprising:
and the second fiber bragg grating sensor (210) is fixedly installed on the oil-gas pipeline (10) along the circumferential direction of the oil-gas pipeline (10) and is used for monitoring the circumferential deformation of the oil-gas pipeline (10).
6. A monitoring device for oil and gas pipelines according to claim 5,
further comprising: a clamp assembly (220), comprising:
the clamping device comprises a first half clamping ring (221), wherein two ends of the first half clamping ring (221) are respectively provided with a first positioning hole (2211);
the two ends of the second half clamping ring (222) are respectively provided with a second positioning hole (2221);
the first half clamping ring (221) and the second half clamping ring (222) are matched to jointly define a clamping cavity matched with the oil-gas pipeline (10), and the second fiber bragg grating sensor (210) is embedded in the first half clamping ring (221) and the second half clamping ring (222) respectively;
the first positioning hole (2211) corresponds to the second positioning hole (2221), and a fastener penetrates through the first positioning hole (2211) and the second positioning hole (2221) in sequence.
7. A monitoring system for an oil and gas pipeline, comprising:
the monitoring device for monitoring the amount of settling displacement deformation of an oil and gas pipeline (10) as claimed in any one of claims 1 to 4;
a monitoring device for monitoring circumferential deformation of an oil and gas pipeline (10) as claimed in claim 5 or claim 6;
a wire (300) having one end coupled to the first FBG sensor (110) and the other end extending to a ground surface (500);
wherein, the monitoring devices for the settlement displacement deformation are arranged at intervals along the extending direction of the oil and gas pipeline (10);
the monitoring devices of the circumferential deformation are arranged at intervals along the extending direction of the oil-gas pipeline (10) and are in one-to-one correspondence and coupled with the monitoring devices of the settlement displacement deformation.
8. A monitoring system for oil and gas pipelines according to claim 7,
further comprising: a cement base (400) having a high hardness,
which is fixed to the ground surface (500) and coupled to the other end of the lead (300).
9. A monitoring system for oil and gas pipelines according to claim 7,
the lead (300) is a steel bar piece.
10. A method for installing a detection device for an oil and gas pipeline is characterized by comprising the following steps:
s10: fixing a first fiber grating sensor (110) on an oil and gas pipeline (10) and installing the first fiber grating sensor into a test box (120);
s20: installing a second fiber grating sensor (210) along the circumferential direction of the oil-gas pipeline (10), manufacturing two semi-annular first semi-clamping rings (221) and second semi-clamping rings (222) according to the semi-circumference of the oil-gas pipeline (10), and connecting the two semi-annular first semi-clamping rings and the second semi-clamping rings to the oil-gas pipeline (10), so that the second fiber grating sensor (210) is fixed by a clamping cavity formed by the first semi-clamping rings (221) and the second semi-clamping rings (222);
s30: selecting a lead (300) with a proper length according to the embedding depth of the oil-gas pipeline (10), and coupling one end of the lead (300) with a first fiber bragg grating sensor (110) in the test cavity;
s40: after the embedding of the oil and gas pipeline (10) is finished, the other end of the lead (300) extends out of the ground surface (500), a cement base (400) is arranged on the ground surface (500), and the other end of the lead (300) is fixed in the cement base (400).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210373492.3A CN114963024A (en) | 2022-04-11 | 2022-04-11 | Monitoring device and detection system for oil and gas pipeline and installation method of detection system |
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| CN202210373492.3A CN114963024A (en) | 2022-04-11 | 2022-04-11 | Monitoring device and detection system for oil and gas pipeline and installation method of detection system |
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Cited By (1)
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