CN204964805U - Oil gas is monitored with high temperature resistant carbon hermetic fiber in pit - Google Patents
Oil gas is monitored with high temperature resistant carbon hermetic fiber in pit Download PDFInfo
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- CN204964805U CN204964805U CN201520642379.6U CN201520642379U CN204964805U CN 204964805 U CN204964805 U CN 204964805U CN 201520642379 U CN201520642379 U CN 201520642379U CN 204964805 U CN204964805 U CN 204964805U
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Abstract
The utility model discloses an oil gas is monitored with high temperature resistant carbon hermetic fiber in pit, including the glass fibre core, the glass fibre core outward in proper order the cladding have quartzy glass covering, carbon sealing layer, optic fibre coat and fluoroplastics enhancement layer, be equipped with the doping thing in glass fibre core and the quartzy glass covering, the doping thing is one or more in germanium compound, phosphorus compounds, aluminium compound, the nitrogen compound, the optic fibre coat is high temperature resistant ultra -violet curing material layer, including high temperature resistant interior coat and high temperature resistant outer coat, the modulus of high temperature resistant outer coat is higher than the modulus of high temperature resistant interior coat. The utility model provides an oil gas is monitored with high temperature resistant carbon hermetic fiber in pit through forming the carbon sealing layer on glass fibre core surface, adopting high temperature resistant coat structure and increase the fluoroplastics enhancement layer, improves the reliability of optic fibre under adverse circumstances such as oil gas field well, reduces the hydrogen loss of optic fibre, improves optic fibre fatigue resistance.
Description
Technical field
The utility model relates to a kind of optical fiber, particularly relates to the high temperature resistant carbon hermetic fiber of a kind of oil gas underground monitoring.
Background technology
The test of Oil/gas Well is one of Exploration of Oil And Gas and the important step in developing, fiber grating sensing technology is strong with its anti-electromagnetic interference capability, size is little, little by space size restriction, measuring accuracy is high, can realize the advantages such as distributed measurement, has been widely used in real-time, the high-acruracy survey of the data such as Oil/gas Well downhole temperature, pressure.
Optical fiber at present for Oil/gas Well Underground Distributed temperature monitoring system is generally common high temperature resistant communication single mode or multimode optical fiber, this type optical fiber can be divided into four large classes according to the material category difference of its coat, respectively: (1) adopts high temperature resistant acryl resin as the high-temperature resistant optical fiber of coat, the coating solidification of this optical fiber coating can be realized by the online coating ultraviolet light curing technique of drawing optical fibers, different drawing speeds can be adapted to, but high temperature resistant grade is lower, the typical Long-term service temperature of main product is at 150 DEG C; (2) adopt heat-proof silica gel as the high-temperature resistant optical fiber of coat, the curing mode of heat-proof silica gel has heat curing and ultraviolet light polymerization two kinds, the drawing speed that heat curing requires is lower, ultraviolet light polymerization can adapt to the coating curing process under different drawing speed, and the Long-term service temperature of existing heat-proof silica gel coat high-temperature resistant optical fiber is generally at 200 DEG C; (3) adopt polyimide as the high-temperature resistant optical fiber of coat material, Long-term service temperature is higher, and generally at 350 DEG C ~ 400 DEG C, but coating curing process adopts low speed wire drawing heat curing process, drawing speed is generally at about 20m/min, because the coating thickness of single application is thinner, about 5 μm ~ 10 μm, need through repeatedly repeatedly applying solidification, simple optical fiber continuous length is short, and coat is higher because of modulus, common Miller should not be adopted to clamp and to peel off coat fast, line inconvenience; (4) adopt metal material as the high-temperature resistant optical fiber of coat, temperature resistant grade is high, energy long-term work is in the hot environment of more than 400 DEG C, but its coating curing process is complicated, cannot realize applying solidification online under high speed fibre wire drawing state, cost of manufacture is high, and compare above-mentioned three kinds of high-temperature resistant optical fibers, the use of washing layer high-temperature resistant optical fiber is relatively less.Although above four class high-temperature resistant optical fibers all have the resistance to elevated temperatures than conventional telecommunications fiber excellence, but still cannot meet Oil/gas Well underground work need for environment completely.
Oil/gas Well subsurface environment is severe; the multiple harsh factors such as high temperature, high pressure, high humility, high salinity are intricate; common high temperature resistant communication single mode or multimode optical fiber only have good adaptability to hot environment, cannot solve down-hole high pressure, the problem that fiber transmission attenuation increases, coat is easily corroded, serviceable life declines that high humility, high salinity cause.Carbon Hermetic coating optical fiber forms fine and close carbon-coating by special carbon Hermetic coating technique at optical fiber surface, slow down the growth of optical fiber surface micro-crack, optical fiber surface and environmental sealing are isolated, stop moisture and hydrogen on the impact of mechanical fiber optic intensity and optical property, the loss that reduction optical fiber hydrogen under high humility, hyperbaric environment permeates and causes increases, improve fatigue performance and the Sensitivity of Stress Corrosion parameter of optical fiber, thus improve serviceable life and the reliability of optical fiber, as shown by the following formula:
In formula: t
sfor fiber lifetime (unit s), t
pfor screening time (unit s), m is the slope of fiber strength distribution curve Weibull distribution curve, and n is endurance ratio, N
pfor breaks (secondary/km) during screening, L is that fiber lengths (km), F are for allowing fracture probability, σ
pfor screening rear minimum strength, σ
sfor static stress intensity (applied stress).
Carbon Hermetic coating optical fiber is used for the operation of Oil/gas Well underground monitoring, effectively can solves the optical fiber problem that loss increases under down-hole high humility, hyperbaric environment, serviceable life declines.The research of domestic and international optical fiber and production unit such as Japanese Teng Cang, Sumitomo, U.S. CORNING, Wuhan post and telecommunications Research Center etc. have successively carried out more deep research to carbon Hermetic coating optical fiber, wherein Chinese electric section 23 achieved the research and production of large length high strength carbon Hermetic coating optical fiber by feed composition improvement and process modification.And existing carbon Hermetic coating optical fiber coating layer material generally adopts conventional acrylic materials, Long-term service temperature is the highest only has about 85 DEG C and decay resistance is lower, do not possess the temperature resistant grade of high-temperature resistant optical fiber, the optical fiber coating etching problem that the hot environment demand of Oil/gas Well down-hole and down-hole high salinity environment cause cannot be met.
In order to ensure optical fiber can under the rugged surroundings of high temperature, high pressure, high humility, high salinity long-term stable operation, need one to take into account high-temperature resistant optical fiber and carbon Hermetic coating optical fiber feature simultaneously, and there is single mode and the multimode optical fiber of good corrosion resistance.
Utility model content
Technical problem to be solved in the utility model is to provide the high temperature resistant carbon hermetic fiber of a kind of oil gas underground monitoring, can solve existing high-temperature resistant optical fiber and cause in the hydrogen infiltration for affecting by down-hole high humility, high pressure, high salinity environment and cause during the operation of Oil/gas Well underground monitoring the problem that loss increases, coat is easily corroded, serviceable life declines.
The utility model is solve the problems of the technologies described above the technical scheme adopted to be to provide the high temperature resistant carbon hermetic fiber of a kind of oil gas underground monitoring, comprise glass core, wherein, described glass core is coated with quartz glass covering, carbon sealant, optical fiber coating and fluoroplastic enhancement layer outward successively.
The high temperature resistant carbon hermetic fiber of above-mentioned oil gas underground monitoring, wherein, is provided with alloy in described glass core and quartz glass covering, and described alloy is one or more in germanium compound, phosphorus compound, aluminium compound, nitrogen compound.
The high temperature resistant carbon hermetic fiber of above-mentioned oil gas underground monitoring, wherein, described optical fiber coating is high temperature resistant ultraviolet photocureable material layer, comprises high temperature resistant interior coat and high temperature resistant outer coat, and the modulus of described high temperature resistant outer coat is higher than the modulus of high temperature resistant interior coat.
The high temperature resistant carbon hermetic fiber of above-mentioned oil gas underground monitoring, wherein, described high temperature resistant ultraviolet photocureable material layer is polyurethanes curing material layer, esters of acrylic acid curing material layer, silica-based class curing material layer or epoxies curing material layer.
The high temperature resistant carbon hermetic fiber of above-mentioned oil gas underground monitoring, wherein, described fluoroplastic enhancement layer is ethylene-tetrafluoroethylene copolymer layer, polytetrafluoroethylene floor, full fluorine copolymer layer, poly-perfluoroalkoxy resin layer, polychlorotrifluoroethylene layer, ethylene-chlorotrifluoro-ethylene copolymer layer, polyvinylidene fluoride layer or polyvinyl fluoride layer.
The high temperature resistant carbon hermetic fiber of above-mentioned oil gas underground monitoring, wherein, described high temperature resistant carbon hermetic fiber is single-mode fiber or multimode optical fiber.
The utility model contrast prior art has following beneficial effect: the high temperature resistant carbon hermetic fiber of the oil gas underground monitoring that the utility model provides, by forming carbon sealant on glass core surface, adopt high temperature resistant coating layer and increase fluoroplastic enhancement layer, improve the reliability of optical fiber under the rugged surroundings such as oil gas field well, reduce the hydrogen loss of optical fiber, improve optical fiber fatigue performance.
Accompanying drawing explanation
Fig. 1 is the single coat of the utility model oil gas underground monitoring high temperature resistant carbon sealing single-mode fiber cross section structure schematic diagram;
Fig. 2 is the two coat of the utility model oil gas underground monitoring high temperature resistant carbon sealing single-mode fiber cross section structure schematic diagram;
Fig. 3 is the two coat of the utility model oil gas underground monitoring high temperature resistant carbon sealing multimode optical fiber cross section structure schematic diagram;
Fig. 4 is optical fiber in Fig. 1 and Fig. 2 and the G.652D attenuation coefficient graph of measured results of single-mode fiber before and after boiling test;
The attenuation coefficient measurement result histogram of Fig. 5 to be optical fiber in Fig. 1 and Fig. 2 with G.652D single-mode fiber test through carrying hydrogen front and back;
Fig. 6 is optical fiber in Fig. 3 and the attenuation coefficient graph of measured results of A1b multimode optical fiber before and after boiling test;
Fig. 7 is optical fiber in Fig. 3 and A1b multimode optical fiber tests front and back attenuation coefficient measurement result histogram through carrying hydrogen.
In figure:
1 glass core 2 quartz glass covering 3 carbon sealant
The high temperature resistant outer coat of the high temperature resistant interior coat 42 of 4 high temperature resistant coat 41
5 fluoroplastic enhancement layers
Embodiment
Below in conjunction with drawings and Examples, the utility model will be further described.
Fig. 1 is the single coat of the utility model oil gas underground monitoring high temperature resistant carbon sealing single-mode fiber cross section structure schematic diagram.
Refer to Fig. 1, the high temperature resistant carbon hermetic fiber of the oil gas underground monitoring that the utility model provides, comprises glass core 1, and wherein, described glass core 1 is outer is coated with quartz glass covering 2, carbon sealant 3, optical fiber coating 4 and fluoroplastic enhancement layer 5 successively.
The high temperature resistant carbon hermetic fiber of the oil gas underground monitoring that the utility model provides, is provided with alloy in described glass core 1 and quartz glass covering 2, and described alloy is one or more in germanium compound, phosphorus compound, aluminium compound, nitrogen compound.
The high temperature resistant carbon hermetic fiber of the oil gas underground monitoring that the utility model provides, described optical fiber coating 4 is high temperature resistant ultraviolet light polymerization coat, described high temperature resistant ultraviolet light polymerization coat comprises high temperature resistant interior coat 41 and high temperature resistant outer coat 42, and the modulus of described high temperature resistant outer coat 42 is higher than the modulus of high temperature resistant interior coat 41.
High temperature resistant carbon hermetic fiber of the present utility model is single-mode fiber or multimode optical fiber, high temperature resistant carbon sealing fluoroplastic strengthen optical fiber can long-term stable operation in Oil/gas Well down-hole high temperature, high pressure, high humidity, the severe complex environment such as high salinity, through verification experimental verification, optical fiber is after more than 150 DEG C high temperature storages, coat is intact without cracking, the change compared with before test of fiber-draw fracture strength after test and optical transmittance property is very little, the loss recruitment of optical fiber after high-temperature high-humidity environmental test is significantly less than common high-temperature resistant optical fiber, the fluoroplastic enhancement layer of fiber outer layer has good moisture-proof decay resistance.Use optical fiber of the present invention effectively can solve the loss increase that optical fiber causes under the rugged surroundings of down-hole, the problem that coat is easily corroded, serviceable life declines for Oil/gas Well Underground Distributed temperature monitoring system.
Geometry, the optics of high temperature resistant carbon sealing fluoroplastic enhancing single-mode fiber of the present utility model can be all kinds of single-mode fibers meeting regulation in GB/T9771 " communicating with single-mode fiber " with the transport property of normal temperature environment, described optical fiber coating is high temperature resistant acryl resin or heat-proof silica gel material, coat can be individual layer or double-decker, double-deck coat comprises the lower high temperature resistant interior coat 41 of modulus and the higher high temperature resistant outer coat 42 of modulus, and described optical fiber outermost layer is fluoroplastic enhancement layer 5.
Geometry, the optics of high temperature resistant carbon sealing fluoroplastic enhancing multimode optical fiber of the present utility model can be all kinds of multimode optical fibers meeting regulation in GB/T12357-2004 " communicating with multimode optical fiber " with the transport property of normal temperature environment, described optical fiber coating is high temperature resistant acryl resin or heat-proof silica gel material, coat can be individual layer or double-decker, double-deck coat comprises the lower high temperature resistant interior coat 41 of modulus and the higher high temperature resistant outer coat 42 of modulus, and described optical fiber outermost layer is fluoroplastic enhancement layer 5.
In Fig. 1, silica glass core 1 is the pure silica glass core of undoped, and the material of quartz glass covering 2 is that fluoro-alloyed quartz glass or boron-doping quartz glass or fluorine boron mix quartz glass altogether, and the material of high temperature resistant coat 4 is heat-proof silica gel material.
This type optical fiber have employed carbon Sealing Technology, and its Sensitivity of Stress Corrosion parameter (fatigue performance) reaches more than 100, does not adopt the Sensitivity of Stress Corrosion parameter of the ordinary optic fibre of this technology to be only 20 ~ 30; Fluoroplastic enhancement layer 5 ensure that the moisture-proof decay resistance of optical fiber.The attenuation coefficient measurement result of this optical fiber before and after boiling test as shown in Figure 4, what adopt due to the optical fiber related in Fig. 1 is single coating layer and has carried out carbon sealing on silica clad surface, therefore before test this optical fiber attenuation coefficient at normal temperatures slightly larger than G.652D single-mode fiber, but through poach in 100 DEG C of boiling water after 7 days, the attenuation coefficient of this optical fiber only increases 0.207dB/km1550nm from the front 0.201dB/km1550nm of test, optical transmittance property variable quantity is only 0.006dB/km, significantly be better than common G.652D single-mode fiber, there is good high temperature resistant moisture resistance properties, this type optical fiber carries the attenuation coefficient measurement result of hydrogen test front and back as shown in Figure 5, through 80 DEG C, after 12MPa, 300h carry hydrogen, the carbon sealant on this type optical fiber silica clad surface effectively blocks the infiltration of hydrogen, attenuation coefficient after test is 0.231dB/km1550nm, and optical transmittance property variable quantity is less.
Please continue see Fig. 2, two coating layers that the utility model provides are high temperature resistant, and carbon sealing fluoroplastic enhancing single-mode fiber comprises six parts, that is: glass core 1, quartz glass covering 2, carbon sealant 3, high temperature resistant interior coat 41, high temperature resistant outer coat 42 and fluoroplastic enhancement layer 5, wherein silica glass core 1 is doped silica glass fibre core, doped chemical kind comprises germanium or aluminium, the material of quartz glass covering 2 is the pure quartz glass of undoped, the material of high temperature resistant interior coat 41 is the high temperature resistant acryl resin that modulus is lower, the material of high temperature resistant outer coat 42 is the high temperature resistant acryl resin that modulus is higher.
The carbon Sealing Technology that this type optical fiber adopts makes its fatigue performance obviously be better than ordinary optic fibre (Sensitivity of Stress Corrosion parameter reaches more than 100), inside and outside double-deck high temperature resistant coating layer makes optical fiber have lower high/low temperature alternation added losses and good resistance to elevated temperatures, and fluoroplastic enhancement layer ensure that the moisture-proof decay resistance of optical fiber.The attenuation coefficient measurement result of this optical fiber before and after boiling test as shown in Figure 4, because the optical fiber related in Fig. 2 has carried out carbon sealing on silica clad surface, therefore before test this optical fiber attenuation coefficient at normal temperatures slightly larger than G.652D single-mode fiber, but through poach in 100 DEG C of boiling water after 7 days, the attenuation coefficient of this optical fiber only increases 0.204dB/km1550nm from the front 0.200dB/km1550nm of test, optical transmittance property variable quantity is only 0.004dB/km, significantly be better than common G.652D single-mode fiber, there is good high temperature resistant moisture resistance properties; This type optical fiber carries the attenuation coefficient measurement result of hydrogen test front and back as shown in Figure 5; through 80 DEG C, after 12MPa, 300h carry hydrogen; carbon sealant serves effective protective effect to this type optical fiber; block hydrogen to covering and fibre core infiltration; after test, the attenuation coefficient of this type optical fiber is 0.228dB/km1550nm, and optical transmittance property variable quantity is less.
Please continue see Fig. 3, two coating layers that the utility model provides are high temperature resistant, and carbon sealing fluoroplastic enhancing multimode optical fiber comprises six parts, that is: doped silica glass fibre core 1, doped silica glass covering 2, carbon sealant 3, high temperature resistant interior coat 41, high temperature resistant outer coat 42 and fluoroplastic enhancement layer 5, wherein the doped chemical kind of doped silica glass fibre core 1 comprises germanium or aluminium, the material fluoro-alloyed quartz glass of doped silica glass covering 2 or boron-doping quartz glass or fluorine boron mix quartz glass altogether, the material of high temperature resistant interior coat 41 is the high temperature resistant acryl resin that modulus is lower, the material of high temperature resistant outer coat 42 is the high temperature resistant acryl resin that modulus is higher.
The carbon Sealing Technology that this type optical fiber adopts makes optical fiber have good fatigue performance (Sensitivity of Stress Corrosion parameter reaches more than 100), inside and outside double-deck high temperature resistant coating layer makes optical fiber have lower high/low temperature alternation added losses and good resistance to elevated temperatures, and fluoroplastic enhancement layer ensure that the moisture-proof decay resistance of optical fiber.The attenuation coefficient measurement result of this optical fiber before and after boiling test as shown in Figure 6, optical fiber is through poach in 100 DEG C of boiling water after 7 days, its attenuation coefficient of optical fiber that 3rd embodiment relates to only increases 0.907dB/km1300nm from the front 0.892dB/km1300nm of test, optical transmittance property variable quantity is only 0.015dB/km, significantly be better than common A1b multimode optical fiber, there is good high temperature resistant moisture resistance properties; This type optical fiber carries the attenuation coefficient measurement result of hydrogen test front and back as shown in Figure 7; through 80 DEG C, after 12MPa, 300h carry hydrogen; carbon sealant serves effective protective effect to this type optical fiber; block hydrogen to covering and fibre core infiltration; after test, the attenuation coefficient of this type optical fiber is 0.910dB/km1550nm, and optical transmittance property variable quantity is less.
Although the utility model discloses as above with preferred embodiment; so itself and be not used to limit the utility model; any those skilled in the art; not departing from spirit and scope of the present utility model; when doing a little amendment and perfect, therefore protection domain of the present utility model is when being as the criterion of defining with claims.
Claims (6)
1. the high temperature resistant carbon hermetic fiber of oil gas underground monitoring, comprise glass core (1), it is characterized in that, described glass core (1) is coated with quartz glass covering (2), carbon sealant (3), optical fiber coating (4) and fluoroplastic enhancement layer (5) outward successively.
2. the high temperature resistant carbon hermetic fiber of oil gas underground monitoring as claimed in claim 1, it is characterized in that, be provided with alloy in described glass core (1) and quartz glass covering (2), described alloy is one or more in germanium compound, phosphorus compound, aluminium compound, nitrogen compound.
3. the high temperature resistant carbon hermetic fiber of oil gas underground monitoring as claimed in claim 1, it is characterized in that, described optical fiber coating (4) is high temperature resistant ultraviolet photocureable material layer, comprise high temperature resistant interior coat (41) and high temperature resistant outer coat (42), the modulus of described high temperature resistant outer coat (42) is higher than the modulus of high temperature resistant interior coat (41).
4. the high temperature resistant carbon hermetic fiber of oil gas underground monitoring as claimed in claim 3, it is characterized in that, described high temperature resistant ultraviolet photocureable material layer is polyurethanes curing material layer, esters of acrylic acid curing material layer, silica-based class curing material layer or epoxies curing material layer.
5. the high temperature resistant carbon hermetic fiber of oil gas underground monitoring as claimed in claim 1, it is characterized in that, described fluoroplastic enhancement layer (5) is ethylene-tetrafluoroethylene copolymer layer, polytetrafluoroethylene floor, full fluorine copolymer layer, poly-perfluoroalkoxy resin layer, polychlorotrifluoroethylene layer, ethylene-chlorotrifluoro-ethylene copolymer layer, polyvinylidene fluoride layer or polyvinyl fluoride layer.
6. the high temperature resistant carbon hermetic fiber of the oil gas underground monitoring as described in any one of Claims 1 to 5, is characterized in that, described high temperature resistant carbon hermetic fiber is single-mode fiber or multimode optical fiber.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265188A (en) * | 2019-07-23 | 2019-09-20 | 清华四川能源互联网研究院 | A kind of oil gas underground work cable |
| CN110426778A (en) * | 2019-07-23 | 2019-11-08 | 西安和其光电科技股份有限公司 | A kind of high-temperature oil resistance large-numerical aperture optical fiber and preparation method thereof |
| CN112684554A (en) * | 2020-12-18 | 2021-04-20 | 南京华信藤仓光通信有限公司 | Manufacturing method of high-temperature-resistant optical fiber |
| CN113025252A (en) * | 2021-04-08 | 2021-06-25 | 中航捷锐（北京）光电技术有限公司 | Ultraviolet curing adhesive for winding optical fiber ring of open-loop optical fiber gyroscope and use method thereof |
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2015
- 2015-08-24 CN CN201520642379.6U patent/CN204964805U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265188A (en) * | 2019-07-23 | 2019-09-20 | 清华四川能源互联网研究院 | A kind of oil gas underground work cable |
| CN110426778A (en) * | 2019-07-23 | 2019-11-08 | 西安和其光电科技股份有限公司 | A kind of high-temperature oil resistance large-numerical aperture optical fiber and preparation method thereof |
| CN112684554A (en) * | 2020-12-18 | 2021-04-20 | 南京华信藤仓光通信有限公司 | Manufacturing method of high-temperature-resistant optical fiber |
| CN113025252A (en) * | 2021-04-08 | 2021-06-25 | 中航捷锐（北京）光电技术有限公司 | Ultraviolet curing adhesive for winding optical fiber ring of open-loop optical fiber gyroscope and use method thereof |
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