CN103064153A - Well logging sensor connection packaging device suitable for temperature of 300 DEG C and pressure of 50MPa - Google Patents
Well logging sensor connection packaging device suitable for temperature of 300 DEG C and pressure of 50MPa Download PDFInfo
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- CN103064153A CN103064153A CN2013100258610A CN201310025861A CN103064153A CN 103064153 A CN103064153 A CN 103064153A CN 2013100258610 A CN2013100258610 A CN 2013100258610A CN 201310025861 A CN201310025861 A CN 201310025861A CN 103064153 A CN103064153 A CN 103064153A
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Abstract
The invention relates to a well logging sensor connection packaging device suitable for the temperature of 300 DEG C and the pressure of 50MPa. The well logging sensor connection packaging device is characterized by comprising an optical fiber sensor, a sensing optical cable and an optical cable pressing sleeve, wherein the optical fiber sensor comprises an extended first optical fiber tap; the sensing optical cable passes through the optical fiber pressing sleeve; an extending part is provided with a second optical fiber tap; the tail ends of the first optical fiber tap and the second optical fiber tap are fixedly connected; the optical fiber tap adjacent to the connection point only comprises an optical fiber core and a cladding layer; and the outer peripheries of the first optical fiber tap and the second optical fiber tap are entirely coated with a sealing sleeve of which the inside diameter is greater than the outside diameter of an integral optical fiber, so that an optical fiber redundant space is formed between the sealing sleeve and the connection point. According to the device, a coating layer is peeled from the optical cable adjacent to the optical fiber connection point, and the optical fiber redundant space is formed, so that an optical fiber connector is not affected by external force and stress, and the connection point can be effectively protected; and the connector between the optical fiber sensor and the sensing optical cable has favorable mechanical strength and anti-bending capability.
Description
Technical field
The invention belongs to the communications field, relate to a kind of logging sensor connection encapsulation device that is suitable for temperature 300 degree, pressure 50MPa.
Background technology
Optical fiber sensing technology is that 20 century 70s are followed the development of Fibre Optical Communication Technology and the New Sensing Technology that develops rapidly.More external developed countries acquire a great achievement to the applied research of optical fiber sensing technology, and many optical fiber sensing systems are practical, become the commodity that substitute traditional sensors.
The typical structure of optical fiber is a kind of elongated multilayer coaxial cylindrical entity composition fiber.Be from inside to outside: fibre core (sandwich layer) → covering → coat.The core is fibre core and covering, and the two consists of dielectric optical waveguide jointly, forms conduction and constraint to light signal, realizes the transmission of light, so again the optical fiber of the two formation is called bare fibre.Because the principal ingredient of bare fibre is silicon dioxide, it is a kind of fragility friable material, and bending resistance is poor; poor toughness for improving the microbend performance of optical fiber, applies one deck polymeric coating layer usually again; coat claims again coating, is one deck polymeric coating layer, mainly provides mechanical protection to bare fibre.
In the performance history in oil field, people need to know that in production fluid or the injecting process about the holding property of in-hole fluid and the particulars of state, this will use oil well logging, and its reliability and accuracy are most important.And traditional electronic 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.Fibre Optical Sensor can overcome these difficulties, it is insensitive and can bear extreme condition to electromagnetic interference (EMI), comprise high temperature, high pressure (more than tens MPas) and strong shock and vibration, can measure accurately pit shaft and well site environmental parameter, simultaneously, Fibre Optical Sensor has the distributed measurement ability, can measure measured space distribution, provides profile information.And the Fibre Optical Sensor cross-sectional area is little, and profile is short, takes up space in pit shaft minimum.
For making things convenient for the transmission of data, Fibre Optical Sensor is connected with fiber optic tap being connected with sensing optic cable, and conventional art adopts the connected mode that coats one deck hermetically sealed case after the direct welding in the junction, and the junction bad mechanical strength is a little less than the bend resistance ability.
Summary of the invention
For overcoming conventional art in optical cable sensor and sensing optic cable junction bad mechanical strength, the technological deficiency that the bend resistance ability is weak the invention provides a kind of temperature 300 degree, pressure 50MPa(MPa of being suitable for) logging sensor connection encapsulation device.
The logging sensor connection encapsulation device that is suitable for temperature 300 degree, pressure 50MPa of the present invention, comprise Fibre Optical Sensor, sensing optic cable and optical cable gland, Fibre Optical Sensor comprises the first fiber optic tap that stretches out, described sensing optic cable passes the optical cable gland, and extension is the second fiber optic tap;
Described the first fiber optic tap, the second fiber optic tap end are fixedly connected with; Described the first fiber optic tap and the second fiber optic tap periphery are coated with internal diameter greater than near the sealing shroud of the optical fiber external diameter tie point, thereby form the redundant optical fiber space between sealing shroud and tie point.
Preferably, also comprise the protection overcoat that is enclosed within outside the tie point.
Further, described protection lagging material is teflon.
Preferably, described tie point also is coated with the protection resin outward.
Further, described protection resin is polyimide resin.
Preferably, described sealing shroud comprises sealed liner and the hermetically sealed case that is enclosed within the sealed liner outside.
Preferably, the length in described redundant optical fiber space is 1:1.2 to 1:1.5 with the sensing optic cable Length Ratio that is connected.
Preferably, also comprise being positioned at sealing shroud near sensor one end, sealing shroud is sealed sensor nut and the gasket seal that is locked on the sensor.
Preferably, also comprise the optical cable cassette chuck of clamping optical cable gland and the optical cable set nut of fastening optical cable cassette chuck.
Adopt the logging sensor connection encapsulation device that is applicable to temperature 300 degree, pressure 50MPa environment of the present invention, near the optical fiber tie point optical cable has been peeled off coating, form a redundant optical fiber space, can allow fibre-optical splice not be subjected to the effect of external force and stress, effectively protect tie point; The joint that guarantees sensor/sensor and sensing optic cable has good physical strength and bend resistance ability.
Description of drawings
Fig. 1 illustrates a kind of specific implementation that is suitable for the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa of the present invention;
The Reference numeral name is called among each figure: 1. Fibre Optical Sensor, 2. sensor pressure cap, 3. gasket seal; 4. sensor nut, 5. the first fiber optic tap, 6. the second fiber optic tap; 7. tie point is 8. protected resin bed, 9. the protection overcoat; 10. redundant optical fiber space, 11. hermetically sealed cases, 12. sealed liners, 13. optical cable gland bayonet sockets; 14. the optical cable gland, 15. optical cable cassette chucks, 16. sealant layers; 17. the optical cable set nut, 18. sensing optic cables, the sensing optic cable length that A. connects.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
The logging sensor connection encapsulation device that is suitable for temperature 300 degree, pressure 50MPa of the present invention, comprise Fibre Optical Sensor 1, sensing optic cable 18 and optical cable gland 14, Fibre Optical Sensor comprises the first fiber optic tap 5 that stretches out, described sensing optic cable passes optical cable gland 14, and extension is the second fiber optic tap 6;
Described the first fiber optic tap 5, the second fiber optic tap 6 ends are fixedly connected with; Described the first fiber optic tap 5 and the second fiber optic tap 6 peripheries are coated with internal diameter greater than near the sealing shroud of the optical fiber external diameter tie point, thereby form redundant optical fiber space 10 between sealing shroud and tie point.
Directly coat the connected mode of one deck sealing shroud after the traditional fiber connection employing welding in the junction, the junction bad mechanical strength is a little less than the bend resistance ability again.The present invention the junction adopt internal diameter greater than tie point near the sealing shroud of optical fiber external diameter, make and form a redundant optical fiber space between sealing shroud and the tie point.When the junction sealing shroud is subjected to external force deformation, because the existence in redundant optical fiber space, the distortion of sealing shroud can not be directly delivered to inner fiber optic tap junction, and physical strength and the bend resistance ability of junction have been improved so that the deformable allowed band of junction increases in the redundant optical fiber space.
Structure redundant optical fiber space can adopt internal diameter greater than the sealing shroud of optical fiber external diameter, but preferred, can adopt the internal diameter hermetically sealed case identical with complete optical fiber external diameter, simultaneously near the fiber optic tap the tie point is partly peeled off, whole coats be can peel off and fiber core and covering only kept, also can be as required, the released part coat consists of the redundant optical fiber space of different-thickness.
According to different fibre diameters and redundant optical fiber space external diameter, the redundant optical fiber space length arranges difference, the inventor is through overtesting, when the length in discovery redundant optical fiber space is 1:1.2 to 1:1.5 with the sensing optic cable Length Ratio that is connected, bend resistance performance and the sealing property of junction are better, further, when above-mentioned Length Ratio is 1:1.3, obtain best practical function.The so-called sensing optic cable length that connects is that the close sensing optic cable end face in redundant optical fiber space is to the distance of optical cable gland away from the redundant optical fiber space, such as the distance A that indicates in the accompanying drawing.
For further improving the mechanical property of optical fiber tie point; can also outside tie point, put protecting sheathing; teflon (being commonly called as Teflon) has sealing, high lubricated not viscosity, electrical insulating property and good ageing resistance, heatproof excellent (can long-term work under+250 ℃ to-180 ℃ temperature), and the people is not had toxicity.The thinner thickness of protecting sheathing is generally 0.1 to 0.5 millimeter, and length is arranged on the 25-50 millimeter, to keep the pliability of junction.
Put protecting sheathing after can also coating in advance the protection resin outside the tie point again, with the protection tie point, preferably use polyimide resin, polyimide resin is widely used in cable optic fibre as insullac, also is a kind of good high-temperature resistant coating simultaneously.
Below provide a specific embodiment of the present invention:
First sensor fibre 18 surfaces are smeared and pass optical cable gland 14 after fluid sealant forms sealant layer 16, then cut polishing; The gasket seal 3 of Fibre Optical Sensor is installed on the Fibre Optical Sensor 1; The first fiber optic tap 5 that Fibre Optical Sensor stretches out is all peeled off the coat of outside with second fiber optic tap 6 that will be connected; to protect in advance overcoat to pass fiber optic tap; and then carry out the welding of two fiber optic taps; smear the protection resin at fusion point after the welding and form protection resin bed 8; then will protect overcoat 9 to be socketed on the fusion point, to guarantee intensity and the quality of fusion point.
After above-mentioned fused fiber splice and Protection are finished, between the pressure cap 2 of Fibre Optical Sensor and optical cable gland 14, install sealed liner 12, then hermetically sealed case 11 is installed in sealed liner 12 outsides, sensing optic cable is terminal to be clamped with optical cable cassette chuck, fastening sensor nut 4 and the optical cable set nut 17 that passes optical cable cassette chuck 15, sensing optic cable and hermetically sealed case is fastening; Then carry out repeatedly roll extrusion sealing at optical cable gland bayonet socket 13.
Hermetically sealed case is installed in outside the fusion point, and corrosion resistivity is had relatively high expectations, and the hermetically sealed case outside surface can be smeared corrosion-resistant coating.Sealed liner then requires good mechanical property, and material capability should be better than hermetically sealed case, if same material, then the thickness of sealed liner is usually greater than hermetically sealed case thickness.
Sensor pressure cap 2, optical cable gland 14, sealed liner 12, hermetically sealed case 11, sensor nut 4, optical cable set nut 17 for the trade mark is 304, in 304L or 306 the steel any one.
Described optical cable gland 14, Fibre Optical Sensor metallic gasket 3 materials are through 45# steel, Cr after modified
12, Cr
12Any one of MoV or other mould steel.Cr12 is the high carbon and chromium ledeburite steel, and Cr12MoV is the GB title of steel industry, refers to meet the steel of this standard here, and the hardness behind Cr12MoV mould steel quenching degree, the Q-tempering, intensity, toughness all are better than the CR12 steel.What is called is modified to be the known technology of steel field of smelting, refers to quenching+high tempering; Namely quench first, carry out again high tempering after the quenching and get final product.Modified fundamental purpose is to obtain all reasonable comprehensive mechanical performances of intensity, plasticity.
Optical fiber in sensor fibre of the present invention and the Fibre Optical Sensor be applicable to common multimode, single-mode fiber, polyimide coated fiber, coating metal optical fiber any one or multiple.
The present invention can guarantee that by multiple protective the joint of Fibre Optical Sensor and sensing optic cable has good physical strength and bend resistance ability; Move by repeatedly sealing in the space that can guarantee that optical fiber can remain on independently in sensor/sensor and the sensing optic cable, completely cut off, because its good isolation performance effectively prolongs the serviceable life of optical cable and sensor, allow long-term, the continual mensuration plane that is operated in of test macro.
All metal materials all adopt the processing of the stronger metal of resistance to corrosion in this device, and the foregoing trade mark is 304,304L or 306 steel, and through 45# steel, Cr after modified
12, Cr
12The materials such as MoV or other mould steel are highly resistant to complicated, stronger corrosion environment under the oil well; The redundant optical fiber space that forms through unique design can allow fibre-optical splice not be subjected to the effect of external force and stress, effectively protects fusion point.
Because this device has sealing property good under long term high temperature, can be anti-up to 300 ℃ of high temperature, anti-10000N with upper pulling force, anti-50MPa, even 100MPa can tackle working environment complicated under the oil well with upward pressure, the excellent properties such as anticorrosive; This device is applicable to measure the environmental parameter in pit shaft and well site in the environment of the very severe such as oil well vapour well and transmits coherent signal (such as the liquid level face degree of depth etc.), and can accurately measure, expanded the application of Fibre Optical Sensor, can to exploration drill through work provide lasting, for a long time, measurement parameter accurately.
Previously described is each preferred embodiment of the present invention; preferred implementation in each preferred embodiment is if not obviously contradictory or take a certain preferred implementation as prerequisite; each preferred implementation arbitrarily stack combinations is used; design parameter among described embodiment and the embodiment only is the invention proof procedure for clear statement inventor; be not to limit scope of patent protection of the present invention; scope of patent protection of the present invention still is as the criterion with its claims; the equivalent structure that every utilization instructions of the present invention and accompanying drawing content are done changes, and in like manner all should be included in protection scope of the present invention.
Claims (10)
1.
Be suitable for the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, comprise Fibre Optical Sensor (1), sensing optic cable (18) and optical cable gland (14), Fibre Optical Sensor (1) comprises the first fiber optic tap (5) that stretches out, described sensing optic cable (18) passes optical cable gland (14), and extension is the second fiber optic tap (6);
It is characterized in that: described the first fiber optic tap (5), the second fiber optic tap (6) end are fixedly connected with, and described the first fiber optic tap (5) and the second fiber optic tap (6) periphery are coated with internal diameter greater than near the sealing shroud of the optical fiber external diameter tie point, thereby form redundant optical fiber space (10) between sealing shroud and tie point.
2. be suitable for as claimed in claim 1 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: also comprise being enclosed within the outer protection overcoat (9) of tie point.
3. be suitable for as claimed in claim 2 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: described protection overcoat (9) material is teflon.
4. be applicable to as claimed in claim 1 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa environment, it is characterized in that: described tie point is protected resin bed (8) outward in addition.
5. be suitable for as claimed in claim 4 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: described protection resin bed (8) is polyimide resin.
6. be suitable for as claimed in claim 1 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: described sealing shroud comprises sealed liner (12) and is enclosed within the hermetically sealed case (11) of sealed liner outside.
7. be suitable for as claimed in claim 1 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: near the optical fiber the described tie point only comprises fiber core and covering.
8. be suitable for as claimed in claim 1 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: the length in described redundant optical fiber space (10) is 1:1.2 to 1:1.5 with the sensing optic cable Length Ratio that is connected.
9. be suitable for as claimed in claim 1 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: also comprise being positioned at sealing shroud near Fibre Optical Sensor one end, sealing shroud is sealed sensor nut (4) and the gasket seal (3) that is locked on the Fibre Optical Sensor.
10. be suitable for as claimed in claim 1 the logging sensor connection encapsulation device of temperature 300 degree, pressure 50MPa, it is characterized in that: also comprise the optical cable cassette chuck (15) of clamping optical cable gland and the optical cable set nut (17) of fastening optical cable cassette chuck (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310025861.0A CN103064153B (en) | 2013-01-24 | 2013-01-24 | Be suitable for the logging sensor connection encapsulation device of temperature 300 degrees Celsius, pressure 50MPa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310025861.0A CN103064153B (en) | 2013-01-24 | 2013-01-24 | Be suitable for the logging sensor connection encapsulation device of temperature 300 degrees Celsius, pressure 50MPa |
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| Publication Number | Publication Date |
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| CN103064153A true CN103064153A (en) | 2013-04-24 |
| CN103064153B CN103064153B (en) | 2015-09-30 |
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| CN201310025861.0A Active CN103064153B (en) | 2013-01-24 | 2013-01-24 | Be suitable for the logging sensor connection encapsulation device of temperature 300 degrees Celsius, pressure 50MPa |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849847B2 (en) * | 1980-08-02 | 1983-11-07 | 日本電信電話株式会社 | Connection structure of submarine optical cable |
| CN101709638A (en) * | 2009-11-24 | 2010-05-19 | 山东省科学院激光研究所 | Novel optical fiber temperature and pressure sensor |
| CN201724688U (en) * | 2010-06-24 | 2011-01-26 | 上海启鹏工程材料科技有限公司 | Fiber bragg grating sensor for building and structure healthy detection |
| CN203101683U (en) * | 2013-01-24 | 2013-07-31 | 四川汇源光通信有限公司 | Well-logging sensor connector packaging apparatus suitable for temperature of 300 DEG and pressure of 50MPa |
-
2013
- 2013-01-24 CN CN201310025861.0A patent/CN103064153B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5849847B2 (en) * | 1980-08-02 | 1983-11-07 | 日本電信電話株式会社 | Connection structure of submarine optical cable |
| CN101709638A (en) * | 2009-11-24 | 2010-05-19 | 山东省科学院激光研究所 | Novel optical fiber temperature and pressure sensor |
| CN201724688U (en) * | 2010-06-24 | 2011-01-26 | 上海启鹏工程材料科技有限公司 | Fiber bragg grating sensor for building and structure healthy detection |
| CN203101683U (en) * | 2013-01-24 | 2013-07-31 | 四川汇源光通信有限公司 | Well-logging sensor connector packaging apparatus suitable for temperature of 300 DEG and pressure of 50MPa |
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| Publication number | Publication date |
|---|---|
| CN103064153B (en) | 2015-09-30 |
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