CN102590275A - Suspended monitoring device and monitoring method of submarine pipeline based on active temperature control distributed temperature monitoring - Google Patents
Suspended monitoring device and monitoring method of submarine pipeline based on active temperature control distributed temperature monitoring Download PDFInfo
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- CN102590275A CN102590275A CN2012100450131A CN201210045013A CN102590275A CN 102590275 A CN102590275 A CN 102590275A CN 2012100450131 A CN2012100450131 A CN 2012100450131A CN 201210045013 A CN201210045013 A CN 201210045013A CN 102590275 A CN102590275 A CN 102590275A
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Abstract
The invention relates to a suspended monitoring device and a monitoring method of a submarine pipeline based on initiative temperature control distributed temperature monitoring, belonging to the field of oceanographic engineering and sensor technology. The device consists of a distributed heating unit, a distributed temperature sensing unit and an encapsulation protection layer, wherein the heating unit is made of linear exothermic materials which can be alloy materials such as copper, nickel, chromium, aluminum and iron or carbon-fiber material, the temperature change during the thermal transmission is monitored by an optical fiber in an electric cable based on an optical fiber Brillouin distributed temperature sensing technology or an optical fiber Raman scattering distributed temperature sensing technology, when the monitoring device is arranged by the monitoring method, a sheathed heating cable which contains an optical fiber is distributed at the outer side of the submarine pipeline in the length direction of a pipeline, an electric cable does not needed to be adhered to the surface of the pipeline or be embedded into a pipeline structure, and a suspended section is measured by different temperature characteristics of a sand-water medium in the active heating and heat-emitting process; and the device and the method provided by the invention have the benefits of clear principle, simple technology and high measuring precision, and are suitable for industrialization production.
Description
Technical field
The invention belongs to oceanographic engineering and field of sensing technologies, relate to a kind of unsettled monitoring device of submarine pipeline and method based on the monitoring of active temperature control distributed temperature.
Background technology
In China offshore oil and gas field exploitation marine site, laid the submarine pipeline of numerous quantity at present, these submarine pipelines are being born the vital task of carrying oil gas.Submarine pipeline is the lifeline of offshore oil and gas field, and its operation conditions is directly connected to the safety of offshore oil and gas field.But because the washing away for a long time and the influence of factor such as Marine Geology disaster of ocean current, the carrier below the submarine pipeline is emptied easily, causes the unsettled of submarine pipeline.If can not find these unsettled points as early as possible, the overhanging portion of leaving constantly enlarges, and causes the fracture of submarine pipeline possibly, causes great economic loss to country, also causes great pollution to the ocean simultaneously.Therefore, how to find the unsettled point of submarine pipeline and calculate the unsettled length of submarine pipeline and have crucial meaning as early as possible.
Some companies employ water touch under the frogman to being easy to generate unsettled pipe section both at home and abroad, and mainly there is following shortcoming in the unsettled situation with the inspection submarine pipeline: inefficiency makes maintenance cost increase; In the sea area of ocean current more complicated, the danger of water operation is very big under the frogman; The sea area that some depth of water is bigger, the frogman can't operation.
In recent years, because the development of side-scan sonar technology, the resolution of image was greatly improved.Domestic part physical prospecting expert progressively is applied to side scan sonar system in the unsettled investigation of submarine pipeline, and they rely on the working experience and the knowwhy of long-term accumulation, has formed the methodology of oneself.But should technology also have many shortcomings, for example cost is high, and precision is not enough, can not monitor in real time etc.
Therefore, in order to reduce the maintenance cost in submarine pipeline later stage, increase work efficiency, the use intelligence sensor carries out safely, the unsettled investigation of submarine pipeline efficient, science is inevitable trend.
Summary of the invention
The technical matters that the present invention will solve provides a kind of monitoring method that can measure submarine pipeline overhead positions and length; Accurately realize monitoring, and satisfy of the requirement of actual abominable engineering-environment simultaneously for sensor-based system permanance, stability to the unsettled length of submarine pipeline.
Technical scheme of the present invention is:
A kind of unsettled monitoring device of submarine pipeline based on the monitoring of active temperature control distributed temperature comprises distributed heating unit, distributed temperature sensing unit and packaging protection layer.
Distributed heating unit is processed by the linear fever material, and the power of heating can be controlled by size of current; The linear fever material comprises alloy material or carbon fibre materials such as copper, nickel, chromium, aluminium, iron.
The distributed temperature sensing unit is served as by light transmitting fiber, can be based on optical fiber Brillouin distributed temperature sensing fiber or optical fiber Raman scatter distributions formula TEMP fiber.
The packaging protection layer adopts the water proofing property armoring material.
The distributed temperature sensing unit is arranged in parallel in the distributed heating unit outside, and both connect fixing with glue; The water proofing property armoring material encapsulates distributed heating unit and the distributed temperature sensing unit that bonds together; The unsettled monitoring device of this submarine pipeline is drawn the power lead of distributed heating unit and the light transmitting fiber of armouring cable protection by the end; The power lead of drawing can connect power supply, and utilizes the heating unit in the sensor to produce heat; The light transmitting fiber of drawing then connects the optical fiber detuner, realizes the measurement and the record of temperature.
During installation, will install coastal bottom tube road length direction and be arranged in the submarine pipeline surface, imbed the seabed together with submarine pipeline.During use; This device can be with the outside distribute heat of certain power, because heat conduction velocity in submarine soil and seawater is obviously different, through the temperature curve different characteristic of measurement; Can realize that the pipeline surrounding medium is the water or the judgement of earth, thereby realize unsettled section monitoring.This invention can realize the adjusting of this sensor sensitivity coefficient through the power of heating arrangement.
Effect of the present invention and benefit are that principle is clear, and technology is simple, are suitable for industrialization production, and measuring accuracy is high.
Description of drawings
Fig. 1 is a kind of submarine pipeline monitoring method and application of sensor environment map based on the monitoring of active temperature control distributed temperature.
Fig. 2 is a kind of practical implementation part sectioned view of the submarine pipeline monitoring method based on active temperature control distributed temperature monitoring.
Among the figure: 1 sensor; 2 submarine pipelines; 3 submarine soil layers; 4 distributed heating units; 5 distributed temperature sensing unit; 6 packaging protection layers.
Embodiment
Be described in detail embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
A kind of unsettled monitoring device of submarine pipeline based on active temperature control distributed temperature monitoring mainly is made up of distributed heating unit 4, distributed temperature sensing unit 5 and packaging protection layer 6.Distributed heating unit is processed by the linear fever material, and the distributed temperature sensing unit is served as by light transmitting fiber.Heating unit places the sensor nexine, and sensing unit places its outside, and both are good with the glue adhesion; Then, with water proofing property armoring material heating unit and the temperature sensing unit that bonds together encapsulated with certain intensity; After the encapsulation, install an end and seal fully, the other end is drawn the power lead of distributed heating unit and the light transmitting fiber of armouring cable protection, and the protection that discharges water is carried out in the joint.The packaging protection layer mainly shields, and guarantees the security of whole sensor under longitudinal pulling force and lateral external forces effect.Device of the present invention belongs to the unsettled monitoring sensor of distributed submarine pipeline, during installation its coastal bottom tube road length direction is arranged in the submarine pipeline surface, imbeds the seabed together with submarine pipeline then and gets final product.During use, in exit power lead energized, the outside release heat of heating unit; The exit light transmitting fiber connects goes up the optical fiber detuner, realizes the measurement and the record of temperature in the heating process.The characteristic of the temperature variation curve that collects through analysis realizes that the pipeline surrounding medium is the water or the judgement of earth, thereby realizes unsettled section monitoring.
Claims (5)
1. the unsettled monitoring device of submarine pipeline based on the monitoring of active temperature control distributed temperature is characterized in that this device comprises distributed heating unit, distributed temperature sensing unit and packaging protection layer; Distributed heating unit is processed by the linear fever material; The distributed temperature sensing unit is served as by light transmitting fiber; The packaging protection layer adopts the water proofing property armoring material;
The distributed temperature sensing unit is arranged in parallel in the distributed heating unit outside, and both connect fixing with glue; The water proofing property armoring material encapsulates distributed heating unit and the distributed temperature sensing unit that bonds together; This device is drawn the power lead of distributed heating unit and the light transmitting fiber of armouring cable protection by the end; The power lead of drawing connects power supply, and the light transmitting fiber of drawing then connects the optical fiber detuner.
2. a kind of unsettled monitoring device of submarine pipeline based on the monitoring of active temperature control distributed temperature as claimed in claim 1, its characteristic are that also described linear fever material heating is alloy material or carbon fibre material, and power is controlled by size of current.
3. a kind of unsettled monitoring device of submarine pipeline as claimed in claim 1 based on the monitoring of active temperature control distributed temperature; Its characteristic is that also light transmitting fiber is based on optical fiber Brillouin distributed temperature sensing fiber or optical fiber Raman scatter distributions formula TEMP fiber.
4. a kind of unsettled monitoring device of submarine pipeline based on the monitoring of active temperature control distributed temperature as claimed in claim 2, its characteristic is that also described alloy material or carbon fibre material comprise copper, nickel, chromium, aluminium, iron.
5. use the monitoring method of claim 1 or 2 or the 3 or 4 unsettled monitoring devices of described submarine pipeline, it is characterized in that,
To install coastal bottom tube road length direction and be arranged in the submarine pipeline surface, imbed the seabed together with submarine pipeline; Through the temperature curve different characteristic of measuring in intensification or the temperature-fall period, realize that the pipeline surrounding medium is the water or the judgement of earth, thereby realize unsettled section monitoring; Realize the adjusting of this sensor sensitivity coefficient through the power of heating arrangement.
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| CN2012100450131A CN102590275A (en) | 2012-02-24 | 2012-02-24 | Suspended monitoring device and monitoring method of submarine pipeline based on active temperature control distributed temperature monitoring |
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| CN2012100450131A CN102590275A (en) | 2012-02-24 | 2012-02-24 | Suspended monitoring device and monitoring method of submarine pipeline based on active temperature control distributed temperature monitoring |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181193A (en) * | 2014-08-23 | 2014-12-03 | 华北电力大学（保定） | Method for calculating thermal resistance of packing layer in compound optical fiber of three-core submarine cable |
| CN106052614A (en) * | 2015-04-07 | 2016-10-26 | Lios技术有限公司 | Method and device for monitoring subsea cable |
| CN106369286A (en) * | 2016-10-28 | 2017-02-01 | 大连理工大学 | Distributed photoelectric integrated active monitoring system and method of long-distance buried pipeline leakage |
| CN112697301A (en) * | 2021-01-27 | 2021-04-23 | 南京嘉兆仪器设备有限公司 | Fully-distributed pipeline erosion monitoring system and method based on optical fiber sensing |
| CN114923662A (en) * | 2022-05-10 | 2022-08-19 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Device and method for monitoring development of suspended length in submarine pipeline scouring test in real time |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104181193A (en) * | 2014-08-23 | 2014-12-03 | 华北电力大学（保定） | Method for calculating thermal resistance of packing layer in compound optical fiber of three-core submarine cable |
| CN104181193B (en) * | 2014-08-23 | 2017-05-17 | 华北电力大学（保定） | Method for calculating thermal resistance of packing layer in compound optical fiber of three-core submarine cable |
| CN106052614A (en) * | 2015-04-07 | 2016-10-26 | Lios技术有限公司 | Method and device for monitoring subsea cable |
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| CN112697301A (en) * | 2021-01-27 | 2021-04-23 | 南京嘉兆仪器设备有限公司 | Fully-distributed pipeline erosion monitoring system and method based on optical fiber sensing |
| CN114923662A (en) * | 2022-05-10 | 2022-08-19 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Device and method for monitoring development of suspended length in submarine pipeline scouring test in real time |
| CN114923662B (en) * | 2022-05-10 | 2023-06-09 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Real-time monitoring device and method for suspension length development in submarine pipeline scouring test |
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Application publication date: 20120718 |