CN107065110A - A kind of method that application liquid working substance carries out fibre optic installations in pipeline - Google Patents
A kind of method that application liquid working substance carries out fibre optic installations in pipeline Download PDFInfo
- Publication number
- CN107065110A CN107065110A CN201710104207.7A CN201710104207A CN107065110A CN 107065110 A CN107065110 A CN 107065110A CN 201710104207 A CN201710104207 A CN 201710104207A CN 107065110 A CN107065110 A CN 107065110A
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- Prior art keywords
- optical fiber
- liquid
- working substance
- pipeline
- laid
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/502—Installation methods in fluid conducts, e.g. pipelines
Abstract
A kind of method for carrying out fibre optic installations in pipeline the present invention relates to application liquid working substance, it is characterised in that optical fiber is brought into by the use of the frictional force between liquid working substance and optical fiber as drag force and lay targeted tube by this method.When the present invention is applied to optical cable processing, can be first into reentering optical fiber after stainless steel tube, effectively evade using the risk for causing whole section of optical cable to be scrapped due to interior filling optical fiber heat damage during conventional cable processing technology soldering stainless steel steel band, not only lift optical fiber cabling reliability, optical fiber cabling distance is effectively lifted, and optical fiber cable stranding speed is fast, cabling process is simple and reliable.The present invention can also realize do not put optical cable tubing string can successfully complete downhole optic fiber lay or by former tubing string damage optical fiber be replaced, greatly reduce operating risk and cost, significantly improve reliability of the Fibre Optical Sensor in field use.The present invention can be petroleum works, photoelectric sensing, test optical fiber and field of signal transmissions extensively using technical field.
Description
Technical field
The present invention relates to a kind of laying method of optical fiber, light is carried out in pipeline especially with regard to one kind application liquid working substance
The method that fine (125 μm -255 μm of diameter) is laid.
Background technology
At present, Fibre Optical Sensor is widely used in oil field with characteristics such as its distribution, high temperature resistant, electromagnetism interferences in oil field
Exploitation, oil gas or power pipe are transported in monitoring, are illustrated optical fiber sensing technology and are widely applied field.
Traditional fibre optic installations method uses the gases such as air or nitrogen to pump the medium of optical fiber, and is obtained in field of telecommunications
Extensive use is arrived.But the optical fiber or optical cable minimum diameter laid using gas is probably in 1mm or so, then it is small due to gas in itself
Dragging effect be decreased obviously will be unable to driving optical fiber or optical cable enter.Therefore, gas system of laying is used for optical cable (diameter
More than 1mm) lay, be not particularly suited for laying for optical fiber (general diameter being between 125 μm to 255 μm).In addition, in oil field neck
Domain, due to underground high temperature and high pressure environment, potential safety hazard will be increased by being laid using gas, also it is not recommended that using.
The content of the invention
In view of the above-mentioned problems, carrying out fibre optic installations in pipeline it is an object of the invention to provide a kind of application liquid working substance
Method.
To achieve the above object, the present invention takes following technical scheme：One kind application liquid working substance carries out light in pipeline
The method that fibre is laid, it is characterised in that this method is by the use of the frictional force between liquid working substance and optical fiber as drag force, by fibre ribbon
Enter to lay targeted tube.
When application this method carries out optical cable processing, comprise the following steps：
1) the connection threeway of target pipeline porch is being laid, a wherein import for threeway is connected into liquid driven with reclaiming is
System, another import connects optical fiber supply system, and then target pipeline is laid in connection for outlet；
2) liquid driven and recovery system are opened, liquid working substance is pumped into and laid in targeted tube, optical fiber is then turned on
New optical fibre slow is sent into threeway by supply system, is brought new optical fiber into using the drag force of liquid working substance and is laid targeted tube；
3) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system and optical fiber supply system are complete
Into laying for new optical fiber.
When not considered that the downhole optic fiber that optical fiber is replaced is laid using this method, comprise the following steps：
1) there is auxiliary line in oil well and lay target pipeline composition U-shape structure, and in the U-shaped of two pipelines
End sets u shaped connector, builds the fluid connection passage between two pipelines；
2) the connection threeway of target pipeline porch is being laid, a wherein import for threeway is connected into liquid driven with reclaiming is
System, another import connects optical fiber supply system, and then target pipeline is laid in connection for outlet, and the outlet connection liquid of auxiliary line is driven
Dynamic and recovery system；
3) liquid driven and recovery system are first turned on, liquid working substance is pumped into and laid in targeted tube, is then turned on
New optical fibre slow is sent into threeway by optical fiber supply system, is brought new optical fiber into using the drag force of liquid working substance and is laid target tube
Road；
4) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system and optical fiber supply system are complete
Into new fibre optic installations.
When application this method carries out optical fiber displacement, comprise the following steps：
1) pipeline containing optical fiber of haveing been friends in the past sets U-shaped with laying target pipeline composition U-shape structure at the U-shaped end of two pipelines
Joint, builds the fluid connection passage between two pipelines；
2) the connection threeway of target pipeline porch is being laid, a wherein import for threeway is connected into liquid driven with reclaiming is
System, another import connects optical fiber supply system, and then target pipeline is laid in connection for outlet, and the outlet connection liquid of auxiliary line is driven
Dynamic and recovery system；
3) when carrying out old optical fiber pump-out operation, liquid driven and recovery system is opened, liquid working substance is pumped into and lays mesh
Mark in pipeline, the old optical fiber in auxiliary line is pumped out using the drag force of liquid working substance and enters liquid driven with liquid working substance
It is recovered with recovery system；
4) after old optical fiber is pumped out, open optical fiber supply system and new optical fibre slow is sent into threeway, utilize liquid working substance
New optical fiber is brought into and lays targeted tube by drag force；
5) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system and optical fiber supply system are complete
Into optical fiber displacement.
In a preferred embodiment, after new fibre optic installations or optical fiber displacement are completed, carry out liquid in pipeline and blow
Go out operation, specific operation process is as follows：
Threeway and the connection of liquid driven and recovery system are disconnected first, and switch to gas to supply optical fiber supply system
System；Gas supply system is then turned on, gas is pumped into and lays targeted tube, liquid working substance is by under the promotion of gases at high pressure
Constantly it is discharged to liquid driven and recovery system；Lasting purging until the fluid that is received with recovery system of liquid driven no longer
Containing liquid working substance, gas supply system is closed, liquid blowout operation in targeted tube is laid in completion.
In a preferred embodiment, optical fiber supply system is main by electric rotating machine, torque controller, fiber reel and rotation
Counter of turn-taking is constituted.
In a preferred embodiment, the selection standard of liquid working substance is as follows：
Low temperature condition：When environment temperature is 0~100 DEG C, liquid working substance selection water；
High temperature situation：When environment temperature is 100~300 DEG C, liquid selective isopropanol.
In a preferred embodiment, the internal diameter design standard for laying target pipeline is as follows：
(1) the design lower limit of pipeline internal diameter should to be in laminar condition when fluid in-line flows, or Reynolds number is small
In 2300；
(2) the design lower limit of pipeline internal diameter should cause the drag force that optical fiber is born to be less than fibre tensile strength.
The present invention is due to taking above technical scheme, and it has advantages below：1st, the present invention is due to applying liquid working substance
Frictional force between optical fiber is as drag force, and optical fiber internal stress is evenly distributed during optical fiber is pumped into, and can effectively protect optical fiber, prevents
The situation that only optical fiber is damaged during being pumped into or bending causes loss to increase in pipe occurs.2nd, the present invention be used for optical fiber into
Cable, you can first into optical fiber is reentered after stainless steel tube, effectively evade using during conventional cable processing technology soldering stainless steel steel band by
The risk for causing whole section of optical cable to be scrapped in interior filling optical fiber heat damage, not only lifts optical fiber cabling reliability, optical fiber cabling
Distance is effectively lifted, and optical fiber cable stranding speed is fast, and cabling process is simple and reliable.3rd, the present invention, which can be realized, does not carry
Tripping in optical cable tubing string can successfully complete downhole optic fiber and lay or be replaced optical fiber is damaged in former tubing string, greatly reduce
Operating risk and cost, significantly improve reliability of the Fibre Optical Sensor in field use, can also be by replacing different qualities
Optical fiber, applied to different subsurface environments to meet different monitoring requirements.4th, the present invention can be not only used for fibre optic installations, class
As can be also used for laying for small optical cable (between diameter 0.9mm-3mm).The present invention can be oil extensively using technical field
Engineering, photoelectric sensing, test optical fiber and field of signal transmissions.
Brief description of the drawings
Fig. 1 is the schematic diagram that the present invention carries out new fibre optic installations；
Fig. 2 is the schematic diagram that the present invention carries out optical fiber displacement；
Fig. 3 is the structural representation of u shaped connector of the present invention；
Fig. 4 is pressure-specific volume curve map of typical working medium.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.It should be appreciated, however, that the offer of accompanying drawing is only
For a better understanding of the present invention, they should not be interpreted as limitation of the present invention.
New fibre optic installations embodiment one：
As shown in figure 1, the present embodiment proposes a kind of method for laying new optical fiber, this method is processed suitable for optical cable, its
Comprise the following steps：
1) the connection threeway 4 of the porch of target pipeline 2 is being laid, a wherein import for threeway 4 is connected into liquid driven with returning
Receipts system 1, another import connection optical fiber supply system 3, then target pipeline 2 is laid in connection for outlet.
2) liquid driven and recovery system 1 are first turned on, liquid working substance is pumped into and laid in targeted tube 2, Ran Houkai
Open optical fiber supply system 3 and new optical fibre slow is sent into threeway 4, new optical fiber is brought into using the drag force of liquid working substance and lays target
Pipeline 2.
3) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system 1 and optical fiber supply system 3,
Complete laying for new optical fiber.
New fibre optic installations embodiment two：
As shown in Fig. 2 the present embodiment proposes another method for laying new optical fiber, this method is applied to not consider optical fiber
The downhole optic fiber of replacement is laid, and it comprises the following steps：
1) there is an auxiliary line 5 in oil well and lay the composition U-shape structure of target pipeline 2, and in the U of two pipelines
Type end (being usually shaft bottom end for oil field) sets u shaped connector 6 (as shown in Figure 3), and the liquid built between two pipelines connects
Circulation passage.
2) the connection threeway 4 of the porch of target pipeline 2 is being laid, a wherein import for threeway 4 is connected into liquid driven with returning
Receipts system 1, another import connection optical fiber supply system 3, then target pipeline 2 is laid in connection for outlet；The outlet of auxiliary line is connected
Connect liquid driven and recovery system 1.
3) liquid driven and recovery system 1 are first turned on, liquid working substance is pumped into and laid in targeted tube 2, Ran Houkai
Open optical fiber supply system 3 and new optical fibre slow is sent into threeway 4, new optical fiber is brought into using the drag force of liquid working substance and lays target
Pipeline 2.
4) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system 1 and optical fiber supply system 3,
Complete new fibre optic installations.
The present invention cannot be only used for realizing new fibre optic installations, can be used for realizing that optical fiber is replaced.
Optical fiber replaces embodiment：
When realizing that old optical fiber is pumped out with new fibre optic installations, i.e. optical fiber displacement if desired, its step is real with new fibre optic installations
The step of applying example two is similar：
1) pipeline containing optical fiber of haveing been friends in the past is set to auxiliary line 5, and with laying the composition U-shape structure of target pipeline 2, two
The U-shaped end of root pipeline sets u shaped connector 6, builds the fluid connection passage between two pipelines.
2) the connection threeway 4 of the porch of target pipeline 2 is being laid, a wherein import for threeway 4 is connected into liquid driven with returning
Receipts system 1, another import connection optical fiber supply system 3, then target pipeline 2 is laid in connection for outlet；The outlet of auxiliary line 5 is connected
Connect liquid driven and recovery system 1.
3) when carrying out old optical fiber pump-out operation, liquid driven and recovery system 1 is opened, liquid working substance is pumped into and lays mesh
Mark in pipeline 2, the old optical fiber in auxiliary line 5 is pumped out using the drag force of liquid working substance and driven with liquid working substance into liquid
It is dynamic to be recovered with recovery system 1.
4) after old optical fiber is pumped out, open optical fiber supply system 3 and new optical fibre slow is sent into threeway 4, utilize liquid working substance
Drag force new optical fiber brought into lay targeted tube 2.
5) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system 1 and optical fiber supply system 3,
Complete optical fiber displacement.
In the above-described embodiments, after new fibre optic installations or optical fiber displacement are completed, liquid in pipeline can also be carried out and blown
Go out operation, specific operation process is as follows：
The connection of threeway 4 and liquid driven and recovery system 1 is disconnected first, and optical fiber supply system 3 is switched into gas
Feed system (nitrogen or other lazy gaseousnesses)；Gas supply system is then turned on, gas is pumped into and lays targeted tube 2, liquid
Body working medium constantly will be discharged to liquid driven and recovery system 1 under the promotion of gases at high pressure；Persistently purge 4-8 hours, protect
Untill the fluid that card liquid driven is received with recovery system 1 no longer contains liquid working substance；Gas supply system is closed, completes to apply
If liquid blowout operation in targeted tube 2.
In the above-described embodiments, optical fiber supply system 3 can be enclosed by electric rotating machine, torque controller, fiber reel and rotation
Counter is constituted, and can also can be driven optical fiber by similar and is ensured that the equipment that optical fiber constant moment of force is given is constituted.
Further, the present invention gives the selection standard of liquid working substance, and liquid working substance need to be met in general
It is required that：
(1) liquid working substance is common, meets application field site environment safety requirements.
(2) maximum pressure that is born according to the environment maximum temperature and internal liquid working medium of application selects three-phase critical
Put the liquid of the close or relatively low temperature and pressure value.Such as, when 250 DEG C of down-hole ambient temperature, lay herein in target pipeline
During maximum pressure 5MPa, isopropanol (also referred to as dimethylcarbinol, IPA) may be selected as the liquid working substance laid, the liquid
Critical-temperature is 234.9 DEG C, and critical pressure is 4.764MPa, respectively lower than environment temperature and local fluid pressure.The liquid work
Working medium can effectively ensure that the liquid into downhole temperature elevation process will be directed into above-critical state from ground room temperature in liquid, be not required to
Undergo the two-phase section that density is changed, it is to avoid it is non-that the caused flowing of density mutation caused by gas-liquid phase transition occurs for working medium
Stability and its damage to optical fiber.
(3) what is passed through in liquid work working medium in-line flow process becomes along journey phase (temperature and pressure)
Change process should meet path as shown in phantom in Figure 4, it is to avoid enter two-phase section (Liquid-vapor region).
According to above-mentioned requirements, the selection of liquid working substance suggestion：
Low temperature condition：When environment temperature is 0~100 DEG C, water may be selected in liquid working substance.
High temperature situation：When environment temperature is 100~300 DEG C, isopropanol may be selected in liquid.
Further, the present invention gives the internal diameter design standard for laying target pipeline 2：
The internal diameter for laying target pipeline 2 determines that the flowing of fluid in-line pulls flow velocity and dragging when optical fiber is laid
Power.On the premise of pipeline two ends pressure difference certain (or fluid flow is certain), pipeline internal diameter is bigger, and flow velocity is smaller, Reynolds number (thunder
Promise number=flow velocity * pipelines internal diameter/liquid motion viscosity, is the important parameter for weighing Bottomhole pressure state) it is smaller, drag force is smaller
And flow and be more intended to or laminar condition, the flowing of fluid in-line is more stable；And pipeline internal diameter is smaller, flow velocity is got over
Greatly, Reynolds number is bigger, and drag force is bigger and flows and is more intended to or turbulent (turbulent flow) state, the flowing of fluid in-line
It is more disorderly unstable, it is unfavorable for optical fiber transmission, therefore it is as follows to lay the internal diameter design standard of target pipeline 2：
(1) the design lower limit (minimum value) of pipeline internal diameter should to be in laminar condition when fluid in-line flows, or
Reynolds number is less than 2300.
(2) the design lower limit (minimum value) of pipeline internal diameter should make it that the drag force that optical fiber is born is strong less than optical fiber tension
Degree.
The present invention will be described only by taking optical fiber as an example for the various embodiments described above, though it is foreseeable that it is slightly rational, aobvious and
The change being clear to, such as make optical fiber supply system into optical cable supply system, can also apply the present invention to applying for small optical cable
If.Therefore, every equivalents carried out on the basis of technical solution of the present invention and improvement, should not be excluded the present invention's
Outside protection domain.
Claims (8)
1. a kind of method that application liquid working substance carries out fibre optic installations in pipeline, it is characterised in that this method utilizes liquid work
Optical fiber is brought into as drag force and lays targeted tube by the frictional force between matter and optical fiber.
2. the method that a kind of application liquid working substance as claimed in claim 1 carries out fibre optic installations in pipeline, it is characterised in that
When application this method carries out optical cable processing, comprise the following steps：
1) the connection threeway of target pipeline porch is being laid, a wherein import for threeway is connected into liquid driven and recovery system,
Another import connects optical fiber supply system, and then target pipeline is laid in connection for outlet；
2) liquid driven and recovery system are opened, liquid working substance is pumped into and laid in targeted tube, optical fiber supply is then turned on
New optical fibre slow is sent into threeway by system, is brought new optical fiber into using the drag force of liquid working substance and is laid targeted tube；
3) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system and optical fiber supply system complete new
Optical fiber is laid.
3. the method that a kind of application liquid working substance as claimed in claim 1 carries out fibre optic installations in pipeline, it is characterised in that
When not considered that the downhole optic fiber that optical fiber is replaced is laid using this method, comprise the following steps：
1) there is an auxiliary line in oil well and lay target pipeline composition U-shape structure, and set at the U-shaped end of two pipelines
U shaped connector is put, the fluid connection passage between two pipelines is built；
2) the connection threeway of target pipeline porch is being laid, a wherein import for threeway is connected into liquid driven and recovery system,
Another import connects optical fiber supply system, and then target pipeline is laid in connection for outlet, and the outlet of auxiliary line is connected into liquid driven
With recovery system；
3) liquid driven and recovery system are first turned on, liquid working substance is pumped into and laid in targeted tube, optical fiber is then turned on
New optical fibre slow is sent into threeway by supply system, is brought new optical fiber into using the drag force of liquid working substance and is laid targeted tube；
4) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system and optical fiber supply system complete new
Fibre optic installations.
4. the method that a kind of application liquid working substance as claimed in claim 1 carries out fibre optic installations in pipeline, it is characterised in that
When application this method carries out optical fiber displacement, comprise the following steps：
1) pipeline containing optical fiber of haveing been friends in the past sets u shaped connector with laying target pipeline composition U-shape structure at the U-shaped end of two pipelines,
Build the fluid connection passage between two pipelines；
2) the connection threeway of target pipeline porch is being laid, a wherein import for threeway is connected into liquid driven and recovery system,
Another import connects optical fiber supply system, and then target pipeline is laid in connection for outlet, and the outlet of auxiliary line is connected into liquid driven
With recovery system；
3) when carrying out old optical fiber pump-out operation, liquid driven and recovery system is opened, liquid working substance is pumped into and lays target tube
Lu Zhong, the old optical fiber in auxiliary line is pumped out and enter liquid driven with returning with liquid working substance using the drag force of liquid working substance
Receipts system is recovered；
4) after old optical fiber is pumped out, open optical fiber supply system and new optical fibre slow is sent into threeway, utilize the dragging of liquid working substance
New optical fiber is brought into and lays targeted tube by power；
5) after new optical fiber is reached wait the length laid, closing liquid driving and recovery system and optical fiber supply system complete light
Fibre displacement.
5. the method that a kind of application liquid working substance as described in Claims 2 or 3 or 4 carries out fibre optic installations in pipeline, it is special
Levy and be, after new fibre optic installations or optical fiber displacement are completed, carry out liquid blowout operation in pipeline, specific operation process is such as
Under：
Threeway and the connection of liquid driven and recovery system are disconnected first, and optical fiber supply system is switched into gas supply system
System；Be then turned on gas supply system, gas be pumped into and lays targeted tube, liquid working substance by under the promotion of gases at high pressure not
It is disconnected to be discharged to liquid driven and recovery system；Lasting purging is until the fluid that liquid driven is received with recovery system no longer contains
There is liquid working substance, close gas supply system, liquid blowout operation in targeted tube is laid in completion.
6. the method that a kind of application liquid working substance as described in Claims 2 or 3 or 4 carries out fibre optic installations in pipeline, it is special
Levy and be, optical fiber supply system is mainly made up of electric rotating machine, torque controller, fiber reel and rotating cycle counter.
7. the method that a kind of application liquid working substance as described in Claims 2 or 3 or 4 carries out fibre optic installations in pipeline, it is special
Levy and be, the selection standard of liquid working substance is as follows：
Low temperature condition：When environment temperature is 0~100 DEG C, liquid working substance selection water；
High temperature situation：When environment temperature is 100~300 DEG C, liquid selective isopropanol.
8. the method that a kind of application liquid working substance as described in Claims 2 or 3 or 4 carries out fibre optic installations in pipeline, it is special
Levy and be, the internal diameter design standard for laying target pipeline is as follows：
(1) the design lower limit of pipeline internal diameter should to be in laminar condition when fluid in-line flows, or Reynolds number is less than
2300；
(2) the design lower limit of pipeline internal diameter should cause the drag force that optical fiber is born to be less than fibre tensile strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710104207.7A CN107065110A (en) | 2017-02-24 | 2017-02-24 | A kind of method that application liquid working substance carries out fibre optic installations in pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710104207.7A CN107065110A (en) | 2017-02-24 | 2017-02-24 | A kind of method that application liquid working substance carries out fibre optic installations in pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107065110A true CN107065110A (en) | 2017-08-18 |
Family
ID=59622608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710104207.7A Pending CN107065110A (en) | 2017-02-24 | 2017-02-24 | A kind of method that application liquid working substance carries out fibre optic installations in pipeline |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111090155A (en) * | 2020-01-17 | 2020-05-01 | 国兴汇金(深圳)科技有限公司 | Optical fiber armoring device |
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| GB2122367A (en) * | 1982-05-06 | 1984-01-11 | Standard Telephones Cables Ltd | Laying cables |
| US4941774A (en) * | 1986-10-15 | 1990-07-17 | Rudolf Harmstorf | Method and an apparatus for moving a rope- or cable-like element through a cable channel pipe |
| CN1296655A (en) * | 1998-02-04 | 2001-05-23 | 法国电讯公司 | Method for installing and/or removing cable in cable passage conduits and implementing device |
| CN101055340A (en) * | 2007-05-31 | 2007-10-17 | 上海交通大学 | Water application method optical cable laying and construction method |
| CN103247975A (en) * | 2013-05-28 | 2013-08-14 | 四川宏华石油设备有限公司 | Cable injection and recovery system |
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2017
- 2017-02-24 CN CN201710104207.7A patent/CN107065110A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2122367A (en) * | 1982-05-06 | 1984-01-11 | Standard Telephones Cables Ltd | Laying cables |
| US4941774A (en) * | 1986-10-15 | 1990-07-17 | Rudolf Harmstorf | Method and an apparatus for moving a rope- or cable-like element through a cable channel pipe |
| CN1296655A (en) * | 1998-02-04 | 2001-05-23 | 法国电讯公司 | Method for installing and/or removing cable in cable passage conduits and implementing device |
| CN101055340A (en) * | 2007-05-31 | 2007-10-17 | 上海交通大学 | Water application method optical cable laying and construction method |
| CN103247975A (en) * | 2013-05-28 | 2013-08-14 | 四川宏华石油设备有限公司 | Cable injection and recovery system |
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| Title |
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| CN111090155A (en) * | 2020-01-17 | 2020-05-01 | 国兴汇金(深圳)科技有限公司 | Optical fiber armoring device |
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Application publication date: 20170818 |