CN202578670U - Optical fiber temperature sensor for petroleum engineering logging - Google Patents
Optical fiber temperature sensor for petroleum engineering logging Download PDFInfo
- Publication number
- CN202578670U CN202578670U CN 201220153760 CN201220153760U CN202578670U CN 202578670 U CN202578670 U CN 202578670U CN 201220153760 CN201220153760 CN 201220153760 CN 201220153760 U CN201220153760 U CN 201220153760U CN 202578670 U CN202578670 U CN 202578670U
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- temperature sensor
- optical fiber
- fiber temperature
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- coupler
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Abstract
The utility model relates to an optical fiber temperature sensor for petroleum engineering logging. The current temperature sensor has the defects of low precision, poor resistance to high temperature, small range of temperature measurement, poor resistance to electromagnetic interference and poor corrosion resistance. In the optical fiber temperature sensor, a laser (1) and an optical power meter (5) are respectively connected with optical fibers (3) at two ports of one side of a coupler (2), and one port on the other side of the coupler (2) is connected with an F-P cavity sensing head (4). The temperature change is detected through the F-P cavity sensing head (4), the optical power meter (5) is used for demodulating an interference signal, and finally the relationship between interference power and temperature is obtained. The optical fiber temperature sensor realizes that the cost is low and the interference of other parameters can be avoided in a bad measurement environment. The optical fiber temperature sensor has the characteristics of small size, resistance to electromagnetic interference, resistance to corrosion, high insulating properties and the like. The practicality of the optical fiber temperature sensor for petroleum engineering logging is greatly enhanced.
Description
Technical field
The utility model belongs to sensory field of optic fibre, relates to the fibre optic temperature sensor that a kind of petroleum works well logging is used.
Background technology
Petroleum works well logging technology is the most basic technology in the oil-gas exploration and development activity, is to find that oil-gas reservoir, evaluating oil are hidden the most in time, the most direct means, has that the subsurface information of obtaining is timely, various, analysis interpretation characteristics efficiently.At present, utilize temperature pick up to survey collection in the petroleum works well logging technology.Prior art generally is to adopt the mode of thermocouple temperature measurement; But this temperature pick up precision is low; And deficiencies such as heat-resisting ability is poor, temperature-measuring range is little, anti-electromagnetic interference capability is low, corrosion resistance difference can greatly influence the operating efficiency of DATA REASONING, data.
Summary of the invention
The present invention's purpose: the present invention's purpose is exactly in order to overcome existing low, the problems such as heat-resisting ability is poor, temperature-measuring range is little, anti-electromagnetic interference capability is poor, corrosion resistance difference of temperature pick up precision, to have proposed the fibre optic temperature sensor that a kind of petroleum works well logging is used.
In order to realize the invention described above purpose, intend the following technology that adopts:
Laser instrument is connected with two fiber ports of coupler one side respectively with light power meter, and a port of coupler opposite side is connected with F-P chamber sensing head optical fiber.
Maximum characteristics of the present invention: the present invention has realized under abominable measurement environment, realizing low cost and the interference that also can avoid other parameter.And characteristics such as it has, and volume is little, diamagnetism is disturbed, corrosion-resistant, high-insulativity.Strengthened the practicality of the fibre optic temperature sensor that the petroleum works well loggings uses greatly.
Description of drawings
Fig. 1 has illustrated that structure of the present invention, Fig. 2 are the preceding sectional drawings of F-P chamber sensing head.
1, laser instrument; 2, coupler; 3, optical fiber; 4, F-P chamber sensing head; 5, light power meter.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Laser instrument is connected with two fiber ports of coupler one side respectively with light power meter, and a port of coupler opposite side is connected with F-P chamber sensing head optical fiber.
Said F-P chamber sensing head utilizes laser micro-machining technology that two root multimode fibers and quartz capillary are welded together, and the perpendicular end surface of two optical fiber and air-gap form the F-P chamber.
Light that laser instrument sends is passed to F-P chamber sensing head through coupler and optical fiber, passes through coupler once more by the signal of F-P chamber sensing head reflected back.After reach the light power meter that links to each other with coupler.
Because it is different with coefficient of thermal expansion capillaceous to constitute the optical fiber of F-P chamber sensing head, the gap lengths in temperature that sensing head is experienced and F-P chamber has certain corresponding relation.If the excursion that the change of temperature makes has then just had corresponding relation between temperature and the interference strength between maximum and minimum of multiple-beam interference Strength Changes.Can detect interference strength with light power meter, and then learn the height of temperature.
Claims (1)
1. fibre optic temperature sensor that the petroleum works well logging is used; It is characterized in that: laser instrument (1) is connected with two fiber ports (3) of coupler (2) one sides respectively with light power meter (5), and a port of coupler (2) opposite side is connected with F-P chamber sensing head (4) optical fiber (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220153760 CN202578670U (en) | 2012-04-06 | 2012-04-06 | Optical fiber temperature sensor for petroleum engineering logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220153760 CN202578670U (en) | 2012-04-06 | 2012-04-06 | Optical fiber temperature sensor for petroleum engineering logging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202578670U true CN202578670U (en) | 2012-12-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220153760 Expired - Fee Related CN202578670U (en) | 2012-04-06 | 2012-04-06 | Optical fiber temperature sensor for petroleum engineering logging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202578670U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801499A (en) * | 2018-06-11 | 2018-11-13 | 南昌航空大学 | A kind of sonde-type temperature sensor based on capillary fiber Yu ordinary optic fibre welding |
| CN109029777A (en) * | 2018-09-10 | 2018-12-18 | 曲阜师范大学 | Fibre optic thermometer based on principle of interference |
| CN109441434A (en) * | 2018-12-19 | 2019-03-08 | 常州艾控智能仪表有限公司 | Multi-parameter measuring systems under photoelectricity combined shaft |
-
2012
- 2012-04-06 CN CN 201220153760 patent/CN202578670U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801499A (en) * | 2018-06-11 | 2018-11-13 | 南昌航空大学 | A kind of sonde-type temperature sensor based on capillary fiber Yu ordinary optic fibre welding |
| CN109029777A (en) * | 2018-09-10 | 2018-12-18 | 曲阜师范大学 | Fibre optic thermometer based on principle of interference |
| CN109441434A (en) * | 2018-12-19 | 2019-03-08 | 常州艾控智能仪表有限公司 | Multi-parameter measuring systems under photoelectricity combined shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Song Xiaoyu Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130406 |