CN102839966A - Micro-differential pressure optical fiber flow sensor in high temperature environment - Google Patents
Micro-differential pressure optical fiber flow sensor in high temperature environment Download PDFInfo
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- CN102839966A CN102839966A CN2012103453767A CN201210345376A CN102839966A CN 102839966 A CN102839966 A CN 102839966A CN 2012103453767 A CN2012103453767 A CN 2012103453767A CN 201210345376 A CN201210345376 A CN 201210345376A CN 102839966 A CN102839966 A CN 102839966A
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Abstract
The invention relates to the technical field of oil well logging, in particular to a micro-differential pressure optical fiber flow sensor in a high temperature environment. Two optical fiber sensors of the device are mounted at the upper end and the lower end of a protective cylinder respectively and are both connected with a tail fiber; each optical fiber sensor comprises a protective steel cylinder; an optical path transmission part is encapsulated in the protective steel cylinder by a high temperature resistant encapsulation material; a glass plate plated with an anti-reflection film is arranged at the front end of the protective steel cylinder; the tail fiber is connected with a self-focusing lens by a hollow pipe filled with waterproof paste; a pressure sensitive sheet of which the inside is plated with a reflecting film is located at the top end of a pressure sensing head; and the pressure sensing head is soldered with the protective steel cylinder. The micro-differential pressure optical fiber flow sensor in the high temperature environment realizes the advantages of high temperature resistance, small size, strong anti-electromagnetic interference capability, corrosive resistance, low consumption, wide frequency band and high working temperature, and can meet the oil flow measurement requirement in a severe subsurface environment.
Description
Technical field:
The present invention relates to a kind of petroleum well logging technology field, little differential optic flow sensor under particularly a kind of hot environment.
Background technology:
In the Oilfield developing process; In order to carry out oil reservoir monitoring and field management; The link of most critical is the holdup that acquisition producing well and water injection well are stablized believable total flow section and each phase fluid; Need know in production fluid or the injecting process about the holding property of borehole fluid and the particulars of state; This will use oil well logging, and its reliability and accuracy are vital, and traditional electronics based sensor can't be worked under down-hole rugged environment such as high temperature, high pressure, the ground electrical interference of burn into earth magnetism.
Summary of the invention:
The technical problem that the present invention will solve provides little differential optic flow sensor under a kind of hot environment; That this device has been realized is high temperature resistant, volume is little, anti-electromagnetic interference capability is strong, corrosion-resistant, loss is low, bandwidth, operating temperature are high, can satisfy oil flow measurement requirement under the adverse circumstances of down-hole.Overcome the deficiency that existing conditional electronic based sensor can't be worked under down-hole rugged environment such as high temperature, high pressure, the ground electrical interference of burn into earth magnetism.
The technical scheme that the present invention taked is: little differential optic flow sensor under a kind of hot environment comprises Fibre Optical Sensor and protection tube; Two Fibre Optical Sensors are installed in the upper/lower terminal of protection tube respectively, and two Fibre Optical Sensors all are connected with tail optical fiber; Fibre Optical Sensor comprises the protection steel cylinder; The optic path part is potted in the protection steel cylinder by high temperature resistant Embedding Material; Protection steel cylinder front end is installed a glass plate that is coated with anti-reflection film; Tail optical fiber is connected with GRIN Lens through the hollow tube that is full of waterproof paste, and the presser sensor sheet that the inboard is coated with reflectance coating is positioned at the top of pressure sensing head, and pressure sensing head and the soldering of protection steel cylinder are together.
The invention has the beneficial effects as follows: the present invention is owing to adopted Fibre Optical Sensor; There is not electronic device; Thereby have high temperature resistant, volume is little, anti-electromagnetic interference capability is strong, corrosion-resistant, loss is low, bandwidth and the high advantage of operating temperature, can satisfy oil flow measurement requirement under the adverse circumstances of down-hole.
Description of drawings:
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of Fibre Optical Sensor.
The specific embodiment:
Like Fig. 1, shown in Figure 2, little differential optic flow sensor under a kind of hot environment comprises Fibre Optical Sensor 1 and protection tube 2; Two Fibre Optical Sensors 1 are installed in the upper/lower terminal of protection tube 2 respectively, and two Fibre Optical Sensors 1 all are connected with tail optical fiber 3; When liquid in the high temperature well that has big static pressure during along the axial flow of protection tube 2, two Fibre Optical Sensors 1 detect the pressure changing information of diverse location respectively, by tail optical fiber 3 outputs, through demodulation process, obtain changes in flow rate situation in the well.Fibre Optical Sensor 1 comprises protection steel cylinder 4; The optic path part is potted in the protection steel cylinder 4 by high temperature resistant Embedding Material 5; Protection steel cylinder 4 front ends are installed a glass plate 9 that is coated with anti-reflection film 10, and the camera lens and the optical fiber of protection Fibre Optical Sensor 1 inner GRIN Lens 8 do not receive pollution, wearing and tearing.Plating anti-reflection film 10 can reduce the reverberation of glass plate 9 end faces and reduce surrounding environment light to receiving the influence of light, improves the signal to noise ratio of Fibre Optical Sensor 1.Tail optical fiber 3 is connected with GRIN Lens 8 through the hollow tube 6 that is full of waterproof paste 7, and the presser sensor sheet 11 that the inboard is coated with reflectance coating 12 is positioned at the top of pressure sensing head 13, and pressure sensing head 13 and 4 solderings of protection steel cylinder are together.Light is incided on the reflectance coating 12 through tail optical fiber 3, GRIN Lens 8, glass plate 9 by light source output, forms minimum hot spot, improves certainty of measurement, forms little differential measurement.
It is understandable that; More than about specific descriptions of the present invention; Only be used to the present invention is described and be not to be subject to the described technical scheme of the embodiment of the invention; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention, to reach identical technique effect; As long as satisfy the use needs, all within protection scope of the present invention.
Claims (1)
1. little differential optic flow sensor under the hot environment comprises Fibre Optical Sensor (1) and protection tube (2); It is characterized in that: two Fibre Optical Sensors (1) are installed in the upper/lower terminal of protection tube (2) respectively, and two Fibre Optical Sensors (1) all are connected with tail optical fiber (3); Fibre Optical Sensor (1) comprises protection steel cylinder (4); The optic path part is potted in the protection steel cylinder (4) by high temperature resistant Embedding Material (5); Protection steel cylinder (4) front end is installed a glass plate (9) that is coated with anti-reflection film (10); Tail optical fiber (3) is connected with GRIN Lens (8) through the hollow tube (6) that is full of waterproof paste (7); The presser sensor sheet (11) that the inboard is coated with reflectance coating (12) is positioned at the top of pressure sensing head (13), and pressure sensing head (13) and the soldering of protection steel cylinder (4) are together.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210345376.7A CN102839966B (en) | 2012-09-17 | 2012-09-17 | Micro-differential pressure optical fiber flow sensor in high temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210345376.7A CN102839966B (en) | 2012-09-17 | 2012-09-17 | Micro-differential pressure optical fiber flow sensor in high temperature environment |
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| CN102839966A true CN102839966A (en) | 2012-12-26 |
| CN102839966B CN102839966B (en) | 2015-07-22 |
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| CN201210345376.7A Active CN102839966B (en) | 2012-09-17 | 2012-09-17 | Micro-differential pressure optical fiber flow sensor in high temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323186A (en) * | 2016-08-18 | 2017-01-11 | 电子科技大学 | System for measuring micro-displacement of sealing surface moving ring |
| WO2017219569A1 (en) * | 2016-06-20 | 2017-12-28 | 天津大学 | Optical fiber fabry-perot type flow measurement device and method with local bending for flow guiding |
Citations (7)
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| US5178153A (en) * | 1984-03-08 | 1993-01-12 | Einzig Robert E | Fluid flow sensing apparatus for in vivo and industrial applications employing novel differential optical fiber pressure sensors |
| CN2506985Y (en) * | 2001-11-08 | 2002-08-21 | 中国科学院西安光学精密机械研究所 | Optical fiber raster flow sensor |
| CN2526798Y (en) * | 2001-11-08 | 2002-12-18 | 中国科学院西安光学精密机械研究所 | Fabry-Perot cavity liquid level sensor |
| US20050274194A1 (en) * | 2004-06-15 | 2005-12-15 | Skinner Neal G | Fiber optic differential pressure sensor |
| CN201310345Y (en) * | 2008-12-15 | 2009-09-16 | 中国石油集团长城钻探工程有限公司 | Shaking optical fiber flow sensor |
| US20100207019A1 (en) * | 2009-02-17 | 2010-08-19 | Schlumberger Technology Corporation | Optical monitoring of fluid flow |
| CN201983811U (en) * | 2011-02-10 | 2011-09-21 | 王存记 | Small-caliber flow measuring device |
-
2012
- 2012-09-17 CN CN201210345376.7A patent/CN102839966B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5178153A (en) * | 1984-03-08 | 1993-01-12 | Einzig Robert E | Fluid flow sensing apparatus for in vivo and industrial applications employing novel differential optical fiber pressure sensors |
| CN2506985Y (en) * | 2001-11-08 | 2002-08-21 | 中国科学院西安光学精密机械研究所 | Optical fiber raster flow sensor |
| CN2526798Y (en) * | 2001-11-08 | 2002-12-18 | 中国科学院西安光学精密机械研究所 | Fabry-Perot cavity liquid level sensor |
| US20050274194A1 (en) * | 2004-06-15 | 2005-12-15 | Skinner Neal G | Fiber optic differential pressure sensor |
| CN201310345Y (en) * | 2008-12-15 | 2009-09-16 | 中国石油集团长城钻探工程有限公司 | Shaking optical fiber flow sensor |
| US20100207019A1 (en) * | 2009-02-17 | 2010-08-19 | Schlumberger Technology Corporation | Optical monitoring of fluid flow |
| CN201983811U (en) * | 2011-02-10 | 2011-09-21 | 王存记 | Small-caliber flow measuring device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219569A1 (en) * | 2016-06-20 | 2017-12-28 | 天津大学 | Optical fiber fabry-perot type flow measurement device and method with local bending for flow guiding |
| CN106323186A (en) * | 2016-08-18 | 2017-01-11 | 电子科技大学 | System for measuring micro-displacement of sealing surface moving ring |
| CN106323186B (en) * | 2016-08-18 | 2019-06-07 | 电子科技大学 | A kind of system measuring sealing surface rotating ring micro-displacement |
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| Publication number | Publication date |
|---|---|
| CN102839966B (en) | 2015-07-22 |
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Effective date of registration: 20190802 Address after: 100032 Liupuwei PetroChina Natural Gas Group Co., Ltd. Xicheng District, Beijing Co-patentee after: China National Petroleum Group Logging Co., Ltd. Patentee after: China Petroleum and Natural Gas Group Co., Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: Chinese Petroleum Group Changcheng Drilling Engineering Co., Ltd. |