CN102839966B - 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 PDF

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Publication number
CN102839966B
CN102839966B CN201210345376.7A CN201210345376A CN102839966B CN 102839966 B CN102839966 B CN 102839966B CN 201210345376 A CN201210345376 A CN 201210345376A CN 102839966 B CN102839966 B CN 102839966B
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China
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protective
optical fiber
pressure
sensor
high temperature
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CN201210345376.7A
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Chinese (zh)
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CN102839966A (en
Inventor
朱秀英
宫继刚
马铭强
郭洪敏
杨留强
周辉
陈淑梅
郑磊
许桂艳
赵俊堂
夏巧林
刘景武
雷刚
陶双福
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中国石油集团长城钻探工程有限公司
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Abstract

本发明涉及一种石油测井技术领域,特别涉及一种高温环境下微压差式光纤流量传感器。 The present invention relates to an oil well logging technology, and particularly relates to a micro-differential pressure flow sensor optical fiber at a high-temperature environment. 该装置的两个光纤传感器分别安装在保护筒的上、下两端,两个光纤传感器均与尾纤相连接;光纤传感器包括保护钢筒,光路传输部分被耐高温灌封材料灌封在保护钢筒内,保护钢筒前端安装一块镀有增透膜的玻璃板,尾纤经充满阻水膏的中空管与自聚焦透镜连接,内侧镀有反射膜的压力敏感片位于压力传感头的顶端,压力传感头与保护钢筒钎焊在一起。 Two optical sensors of the apparatus are mounted on the protective tube, at the two ends, two sensors are connected with an optical fiber pigtail; fiber optic sensor comprises a protective steel cylinder, the optical path portion is transmitted at high temperature encapsulation material to encapsulate the protective steel tube, steel tube distal end is mounted a protective coated with antireflection coating glass plate was filled with water blocking paste pigtail hollow tube connected from the focusing lens, the inner reflective film coated with a pressure sensitive sheet in the pressure sensor head the top of the pressure sensing head and protect the steel tube are brazed together. 本发明实现了耐高温、体积小、抗电磁干扰能力强、耐腐蚀、损耗低、频带宽、工作温度高,能够满足井下恶劣环境下石油流量测量要求。 The present invention achieves a high temperature, small size, immunity to electromagnetic interference capability, corrosion resistance, low loss, wide frequency band, high operating temperature, can meet the requirements of oil flow measurement under downhole harsh environments.

Description

高温环境下微压差式光纤流量传感器 Micro-pressure flow sensor optical fiber at high temperature

技术领域 FIELD

: :

[0001] 本发明涉及一种石油测井技术领域,特别涉及一种高温环境下微压差式光纤流量传感器。 [0001] The present invention relates to well logging technology, and particularly relates to a micro-differential pressure flow sensor optical fiber at a high-temperature environment.

背景技术 Background technique

: :

[0002] 在油田的开发过程中,为了做好油藏监控和油田管理,最关键的环节是获得生产井和注水井稳定可信的总流量剖面和各相流体的持率,需要知道在产液或注水过程中有关井内流体的持性与状态的详细资料,这就要用到石油测井,其可靠性和准确性是至关重要的,而传统的电子基传感器无法在井下恶劣的环境诸如高温、高压、腐蚀、地磁地电干扰下工作。 [0002] In the field of the development process, in order to do a good job monitoring the reservoir and field management, the most critical aspect is the production wells and water injection wells to obtain stable and credible profile and the total flow rate of the fluid phases holders, we need to know production fluid or water during the holding of detailed information on the state of the well fluid, which use the oil well logging, reliability and accuracy are critical, while traditional electronic-based sensors can not be harsh downhole environment work under high temperature, high pressure, corrosion, electrical interference, such as the geomagnetism.

发明内容 SUMMARY

: :

[0003] 本发明要解决的技术问题是提供一种高温环境下微压差式光纤流量传感器,该装置实现了耐高温、体积小、抗电磁干扰能力强、耐腐蚀、损耗低、频带宽、工作温度高,能够满足井下恶劣环境下石油流量测量要求。 [0003] The present invention is to solve the technical problem micro-pressure optical fiber to provide a flow sensor at a high temperature environment, which means to achieve a high temperature, small size, immunity to electromagnetic interference capability, corrosion resistance, low loss, wide frequency band, high operating temperature, can meet the requirements of oil flow measurement under downhole harsh environments. 克服了现有传统电子基传感器无法在井下恶劣的环境诸如高温、高压、腐蚀、地磁地电干扰下工作的不足。 To overcome the existing conventional electronic sensor group can not be less than downhole harsh environments operating at high temperature, corrosion, electrical interference, such as the geomagnetism.

[0004] 本发明所采取的技术方案是:一种高温环境下微压差式光纤流量传感器,包括光纤传感器和保护筒;两个光纤传感器分别安装在保护筒的上、下两端,两个光纤传感器均与尾纤相连接;光纤传感器包括保护钢筒,光路传输部分被耐高温灌封材料灌封在保护钢筒内,保护钢筒前端安装一块镀有增透膜的玻璃板,尾纤经充满阻水膏的中空管与自聚焦透镜连接,内侧镀有反射膜的压力敏感片位于压力传感头的顶端,压力传感头与保护钢筒钎焊在一起。 [0004] The technical solution taken in the present invention is: a high-temperature environment of the optical fiber micro-pressure flow sensor including an optical sensor and a protective tube; two fiber optic sensors are mounted on the protective tube, at the two ends, two sensors are connected to the optical fiber pigtail; fiber optic sensor comprises a protective steel cylinder, transmission light path portion is refractory glass encapsulation material to encapsulate the protective steel tube, steel tube distal end is mounted a protective plated with antireflection film, pigtail via a hollow tube filled with water blocking paste GRIN connected with the inner side coated pressure sensitive reflective film sheet at the top of the pressure sensor head, the sensor head and the protective steel pressure cylinder brazed together.

[0005] 本发明的有益效果是:本发明由于采用了光纤传感器,不存在电子器件,因而具有耐高温、体积小、抗电磁干扰能力强、耐腐蚀、损耗低、频带宽和工作温度高的优点,能够满足井下恶劣环境下石油流量测量要求。 [0005] Advantageous effects of the invention are: Since the present invention uses a fiber optic sensor, there is an electronic device, which has a high temperature, small size, immunity to electromagnetic interference capability, corrosion resistance, low loss, high bandwidth and operating temperature advantages, can meet the requirements of oil flow measurement under downhole harsh environments.

附图说明 BRIEF DESCRIPTION

: :

[0006] 下面结合附图和具体实施方式对本发明做进一步详细的说明。 [0006] The present invention will be further described in detail in conjunction with accompanying drawings and specific embodiments.

[0007] 图1为本发明的结构示意图。 [0007] FIG. 1 is a schematic structural diagram of the present invention.

[0008] 图2为光纤传感器的结构示意图。 [0008] FIG. 2 is a schematic view of the optical fiber sensor.

具体实施方式 Detailed ways

: :

[0009] 如图1、图2所示,一种高温环境下微压差式光纤流量传感器,包括光纤传感器I和保护筒2 ;两个光纤传感器I分别安装在保护筒2的上、下两端,两个光纤传感器I均与尾纤3相连接;当存在大静压的高温井内液体沿保护筒2的轴向流动时,两只光纤传感器I分别检测到不同位置的压力变化信息,由尾纤3输出,经解调处理,得到井内流量变化情况。 [0009] As shown in FIG 1, FIG. 2, at a high-temperature environment, micro-fiber optic pressure type flow sensor comprising a fiber optic sensor I and the protective cylinder 2; I two optical fiber sensors are mounted on the protective tube 2, the two end, two optical fibers are connected to the sensor I pigtail 3; and when there is a large axial flow of well fluid in the static pressure high-temperature protective cylinder 2, the two fiber optic pressure sensor I detect the position change information different from output pigtail 3, the demodulation processing, to obtain well flow changes. 光纤传感器I包括保护钢筒4,光路传输部分被耐高温灌封材料5灌封在保护钢筒4内,保护钢筒4前端安装一块镀有增透膜10的玻璃板9,保护光纤传感器I内部自聚焦透镜8的镜头与光纤不受到污染、磨损。 I protected optical fiber sensor comprises a steel cylinder 4, the optical transmission path is high temperature potting material portion 5 in the potting protective steel cylinder 4, the front end of the protective steel cylinder 4 is mounted a glass plate coated with anti-reflection coating 9 of 10 to protect the optical fiber sensor I internal self-focusing lens 8 and the optical fiber is not contaminated lens wear. 镀增透膜10可以减小玻璃板9端面的反射光及减小周围环境光对接收光的影响,提高光纤传感器I的信噪比。 AR coating 10 may reduce reflection of light glass plate 9 and the end face of reduced ambient light effects on the received light, I improve the SNR of the optical fiber sensor. 尾纤3经充满阻水膏7的中空管6与自聚焦透镜8连接,内侧镀有反射膜12的压力敏感片11位于压力传感头13的顶端,压力传感头13与保护钢筒4钎焊在一起。 3 was filled with water blocking pigtail paste 6 of the hollow tube 7 is connected to the self-focusing lens 8, the inner side 12 coated with a pressure sensitive reflective film sheet 11 located at the top of the pressure sensing head 13, the pressure sensor head 13 and the protective steel cylinder 4 are brazed together. 光由光源输出经尾纤3、自聚焦透镜8、玻璃板9入射到反射膜12上,形成极小光斑,提高测量精度,形成微压差式测量。 Light from the light source through the output pigtail 3, since the focusing lens 8, the glass plate 9 incident on the reflecting film 12, form a very small spot, improve the measurement accuracy, are formed micro-pressure measurement.

[0010] 可以理解的是,以上关于本发明的具体描述,仅用于说明本发明而并非受限于本发明实施例所描述的技术方案,本领域的普通技术人员应当理解,仍然可以对本发明进行修改或等同替换,以达到相同的技术效果;只要满足使用需要,都在本发明的保护范围之内。 [0010] It will be appreciated that the foregoing detailed description of the present invention, only to illustrate the invention and are not limited by the technical solutions described in the embodiment of the present invention, those of ordinary skill in the art will be appreciated that the present invention may still modifications or equivalents, to achieve the same technical effect; use as long as needed, are within the scope of the present invention.

Claims (1)

1.一种高温环境下微压差式光纤流量传感器,包括光纤传感器(I)和保护筒(2);其特征在于:两个光纤传感器(I)分别安装在保护筒(2)的上、下两端,两个光纤传感器(I)均与尾纤(3)相连接;光纤传感器(I)包括保护钢筒(4),光路传输部分被耐高温灌封材料(5)灌封在保护钢筒⑷内,保护钢筒⑷前端安装一块镀有增透膜(10)的玻璃板(9),尾纤⑶经充满阻水膏(7)的中空管(6)与自聚焦透镜⑶连接,内侧镀有反射膜(12)的压力敏感片(11)位于压力传感头(13)的顶端,压力传感头(13)与保护钢筒(4)钎焊在一起。 A high-temperature environment under micro-pressure flow sensor optical fiber, optical fiber sensor comprising (I) and the protective tube (2); characterized in that: two optical sensors (I) are respectively mounted on the protective tube (2), ends, the two sensor fibers (I) are connected with a pigtail (3); an optical fiber sensor (I) comprises a protective steel cylinder (4), the optical transmission path is high temperature potting material portion (5) in the protective potting ⑷ inner steel cylinder, protected steel cylinder is attached to the front end of a glass plate ⑷ antireflection coating (10) (9) a coating, filled with water blocking by pigtail ⑶ paste (7) a hollow tube (6) and the self focusing lens ⑶ connecting the inner reflection film coated with a pressure (12) sensitive sheet (11) located at the top of the pressure sensing head (13), the pressure sensor head (13) and the protective steel cylinder (4) are brazed together.
CN201210345376.7A 2012-09-17 2012-09-17 Micro-differential pressure optical fiber flow sensor in high temperature environment CN102839966B (en)

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CN105890679A (en) * 2016-06-20 2016-08-24 天津大学 Optical fiber Fabry-Perot type flow measuring device with local bending for flow guiding and measuring method
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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CN201983811U (en) * 2011-02-10 2011-09-21 王存记 Small-caliber flow measuring device

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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 level 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
CN201983811U (en) * 2011-02-10 2011-09-21 王存记 Small-caliber flow measuring device

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