CN112068267A - Underground casing optical cable radiation avoiding method and system - Google Patents
Underground casing optical cable radiation avoiding method and system Download PDFInfo
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- CN112068267A CN112068267A CN202010886039.3A CN202010886039A CN112068267A CN 112068267 A CN112068267 A CN 112068267A CN 202010886039 A CN202010886039 A CN 202010886039A CN 112068267 A CN112068267 A CN 112068267A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000005855 radiation Effects 0.000 title claims description 15
- 239000003129 oil well Substances 0.000 claims abstract description 26
- 239000013307 optical fiber Substances 0.000 claims description 53
- 238000010438 heat treatment Methods 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000009826 distribution Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 2
- 238000005516 engineering process Methods 0.000 abstract description 8
- 208000010392 Bone Fractures Diseases 0.000 abstract description 4
- 206010017076 Fracture Diseases 0.000 abstract description 4
- 230000003471 anti-radiation Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4469—Security aspects
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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
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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
- G02B6/56—Processes for repairing optical cables
- G02B6/562—Processes for repairing optical cables locatable, e.g. using magnetic means
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Abstract
The invention discloses an underground casing optical cable anti-radiation method and system, wherein the system comprises a positioning device, an optical cable, a ground demodulation device and an information display device, the positioning device with the azimuth and attitude self-positioning function and the optical cable are arranged together in the process of descending an oil well casing, after the casing is arranged, the positioning device is used for acquiring the position information of the optical cable on the circumference of the casing, the optical cable is prevented from being damaged in the process of fracturing an oil well, the fracture risk of the optical cable is reduced, and the exploitation cost of the oil well is reduced; the optical cable on the sleeve is originally used for collecting information (temperature, pressure and the like) in the well, but is combined with the positioning device to position and protect the optical cable from being damaged, so that the use efficiency of the optical cable is improved, and a foundation is laid for oil well oil gas exploration by utilizing a light sensing technology subsequently.
Description
Technical Field
The invention belongs to the technical field of oil-gas exploration, and particularly relates to an underground casing optical cable radiation avoiding method and system.
Background
Petroleum is an extremely important material, and with the rapid development of the Chinese society, the consumption of petroleum in China is in the first place in the world for a long time. The resource consumption is increased, and the external dependence degree is increased, which has adverse effect on national safety. The method increases the exploration and development strength, develops a new technology, reduces the traditional exploration cost, and improves the petroleum yield, which is an important direction for future energy exploration in China. Oil and gas resources are usually exploited by adopting oil well staged fracturing measures, and the casing can be pressed out of cracks in the oil well fracturing process.
At present, the distributed optical fiber sensor technology has huge application potential in the field of oil and gas exploitation, and the optical fiber is used as a 'geophone' to replace a traditional electronic geophone, so that distributed detection is realized. Meanwhile, compared with an electronic geophone, the optical fiber geophone has the advantages of corrosion resistance, high temperature resistance, strong anti-interference capability, good reliability, low engineering application cost and the like, and can better resist severe environments (high temperature, high pressure and the like) in a well.
When the distributed optical fiber sensing technology is applied to oil wells, particularly exploitation, the optical cable and the casing are arranged together in the casing arrangement process. After the arrangement is finished, the position of the optical cable in the sleeve is uncertain, and if the fracturing technology is executed in a trade, the optical cable can be damaged, and the follow-up data acquisition is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the underground casing optical cable radiation-avoiding method and the underground casing optical cable radiation-avoiding system provided by the invention solve the problems that the position of the optical cable is difficult to determine after the existing casing is put into the well, and the optical cable can be damaged in the casing pressure applying process.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a method for avoiding radiation of an optical cable of a downhole casing comprises the following steps:
s1, before the oil well casing is put into the well, the optical cable is attached to the casing, and a plurality of positioning devices are arranged at the positions corresponding to the optical cable on the casing;
s2, in the process of lowering the well of the oil well casing, sending self position information in real time through a positioning device, and receiving the self position information by an optical cable;
s3, demodulating the information received by the optical cable in real time through the ground demodulation device to obtain the position information corresponding to the positioning device, and further obtaining the position information corresponding to the optical cable;
s4, displaying the position distribution information of the optical cables through the information display device, and accurately pressing the sleeve based on the position distribution information to realize the shielding of the sleeve optical cable.
Further, in the step S1, the positioning device is disposed at a position corresponding to the optical cable outside the sleeve or inside the sleeve;
the positioning device in step S1 is a sound generating device, a heat generating device or an optical fiber device.
Further, when the positioning device is a sound generating device, the corresponding ground demodulation device is a distributed optical fiber sound wave demodulation system;
the sounding device monitors the position of the sounding device on the circumference of the sleeve in real time, when the sounding device can change frequency, the position information of the sounding device is coded according to the set frequency change, and sound wave information containing the position information is sent to the optical cable;
the distributed optical fiber sound wave demodulation system demodulates sound wave information sent by the optical cable, and decodes the sound wave information to obtain position information of the sound generating device.
Further, when the positioning device is a heating device, the corresponding ground demodulation device is a distributed optical fiber temperature demodulation system;
the heating device monitors the position of the heating device on the circumference of the sleeve in real time, codes the position information according to the set frequency change, and sends temperature information containing the position information to the optical cable;
the distributed optical fiber temperature demodulation system demodulates temperature information sent by the optical cable, and decodes the temperature information to obtain position information of the heating device.
Further, when the positioning device is an optical fiber device, the corresponding ground demodulation device is a ground demodulation instrument;
the optical fiber device monitors the position of the optical fiber device on the circumference of the sleeve in real time, sends the position information to the ground demodulation instrument through the optical cable, and demodulates the position information on the circumference of the sleeve through the ground demodulation device.
Further, the step S2 is specifically: the position information of the self on the circumference of the sleeve is monitored in real time through a positioning device, and the position information is encoded into a signal containing the position information of the self according to a set frequency change rule and received by the optical cable.
A downhole casing cable fire avoidance system comprising:
the positioning device is arranged at the position corresponding to the optical cable outside the sleeve and used for acquiring the position information of the positioning device and sending the position information to the optical cable;
the optical cable is used for receiving the position information sent by the positioning device in real time and sending the position information to the ground demodulation device;
the ground demodulation device is used for demodulating the information sent by the optical cable, acquiring the position information of the corresponding positioning device and further acquiring the position information of the corresponding optical cable;
and the information display device is used for displaying the optical cable position distribution information acquired by the ground demodulation device.
Furthermore, the positioning device comprises a power supply unit, a position information sensing unit, an information transmission unit and a main control unit; the position information sensing unit and the power supply unit are both connected with the main control unit, and the information transmission unit is connected with the main control unit through a driving circuit;
the power supply unit comprises a rechargeable battery and a power management circuit, and the rechargeable battery is connected with the main control unit through the power management circuit;
the position information sensing unit comprises a three-axis gyroscope, a three-axis magnetic field sensor and a temperature sensor, and the temperature sensor is connected with the main control unit through a high-temperature operational amplifier circuit.
Furthermore, the information transmission unit is a sound production component, a heating component or an optical fiber component;
when the information transmission unit is a sounding component, the corresponding ground demodulation device is a distributed optical fiber sound wave demodulation system; when the sounding component is variable-frequency, the sounding component monitors the position of the sounding component on the circumference of the sleeve in real time, codes the position information according to the set frequency change, and sends sound wave information containing the position information to the optical cable; when the sounding component sounds at a fixed frequency, coding is carried out at the fixed frequency, and sound wave information containing position information is sent to the optical cable; the distributed optical fiber sound wave demodulation system demodulates sound wave information sent by the optical cable, decodes the sound wave information and obtains position information of the sound generating device;
when the information transmission unit is a heating component, the corresponding ground demodulation device is a distributed optical fiber temperature demodulation system; the heating component monitors the position of the heating component on the circumference of the sleeve in real time, codes the position information of the heating component according to the set frequency change, and sends temperature information containing the position information to the optical cable; the distributed optical fiber temperature demodulation system demodulates temperature information sent by the optical cable and decodes the temperature information to obtain position information of the heating device;
when the information transmission unit is an optical fiber component, the corresponding ground demodulation device is a ground demodulation instrument; the optical fiber assembly monitors the position of the optical fiber assembly on the circumference of the sleeve in real time, sends the position information to an overground demodulation instrument through an optical cable, and demodulates the position information on the circumference of the sleeve through an overground demodulation device.
The invention has the beneficial effects that:
(1) according to the method and the system for avoiding the radiation of the underground casing optical cable, the positioning device with the azimuth and posture self-positioning function and the optical cable are arranged together in the process of descending the oil well casing, after the casing is arranged, the position information of the optical cable on the circumference of the casing is obtained through the positioning device, the optical cable is prevented from being damaged in the process of fracturing the oil well, the fracture risk of the optical cable is reduced, and the exploitation cost of the oil well is reduced;
(2) the optical cable on the sleeve is used for collecting information (temperature, pressure and the like) in the well, and is combined with the positioning device to position and protect the optical cable from being damaged, so that the use efficiency of the optical cable is improved, and a foundation is laid for oil well oil gas exploration by utilizing a light sensing technology subsequently.
Drawings
FIG. 1 is a flow chart of a method for avoiding radiation of an optical cable in a casing downhole provided by the invention.
FIG. 2 is a schematic view of the arrangement of the underground casing cable shielding system provided by the invention.
Fig. 3 is a schematic structural diagram of a positioning device in the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Example 1:
the invention provides a method for avoiding radiation of an underground casing optical cable, which comprises the following steps as shown in figure 1:
s1, before the oil well casing is put into the well, the optical cable is attached to the casing, and a plurality of positioning devices are arranged at the positions corresponding to the optical cable on the casing;
s2, in the process of lowering the oil well casing into the well, sending self position information in real time through a positioning device, and receiving the position information through an optical cable;
s3, demodulating the position information received by the optical cable in real time through the ground demodulation device to obtain the position information corresponding to the positioning device, and further obtaining the position information corresponding to the optical cable;
s4, displaying the position distribution information of the optical cables through the information display device, and accurately pressing the sleeve based on the position distribution information to realize the shielding of the sleeve optical cable.
In the process of lowering the oil well casing into the well, the positioning device with the azimuth and posture self-positioning function and the optical cable are arranged together, after the casing is arranged, the position information of the optical cable on the circumference of the casing is obtained through the positioning device, the optical cable is prevented from being damaged in the oil well fracturing process, the fracture risk of the optical cable is reduced, and the oil well exploitation cost is reduced.
In this embodiment, the positioning device in step S1 is disposed at a position corresponding to the optical cable outside or inside the sleeve, and the positioning device is a sound generating device, a heat generating device or an optical fiber device, and has an automatic positioning function of its own direction and posture;
specifically, when the positioning device is a sound generating device, the corresponding ground demodulation device is a distributed optical fiber sound wave demodulation system; the sounding device monitors the position of the sounding device on the circumference of the sleeve in real time, when the sounding device can change frequency, the sounding device codes the position information according to the set frequency change and sends sound wave information containing the position information to the optical cable, and when the sounding device sounds at a fixed frequency, the sounding device codes the sound wave information containing the position information at the fixed frequency and sends the sound wave information containing the position information to the optical cable; the distributed optical fiber sound wave demodulation system demodulates sound wave information sent by the optical cable, decodes the sound wave information to obtain position information of the sound generating device, and further obtains the position information of the optical cable on the sleeve.
When the positioning device is a heating device, the corresponding ground demodulation device is a distributed optical fiber temperature demodulation system; the heating device monitors the position of the heating device on the circumference of the sleeve in real time, codes the position information according to the set frequency change, and sends temperature information containing the position information to the optical cable; such as converting the position information into some specific regular temperature variation information (representing its position on the circumference of the casing at a specific temperature, or representing its position on the circumference of the casing at a periodic temperature); the optical cable arranged on the sleeve receives the temperature information, the temperature information sent by the optical cable is demodulated by the distributed optical fiber temperature demodulation system, the temperature information is decoded to obtain the position information of the heating device, and then the position information of the optical cable on the sleeve is obtained.
When the positioning device is an optical fiber device, the corresponding ground demodulation device is a ground demodulation instrument; the optical fiber device monitors the position of the optical fiber device on the circumference of the sleeve in real time, the position information of the optical fiber device is sent to an overground demodulation instrument through the optical cable, the position information of the optical fiber device on the circumference of the sleeve is demodulated through the overground demodulation device, and then the position information of the optical cable on the sleeve is obtained.
The step S2 is specifically: the position information of the self on the circumference of the sleeve is monitored in real time through a positioning device, and the position information is coded into a signal containing the position information of the self according to a set frequency change rule and transmitted to the optical cable.
Example 2:
as shown in fig. 2, the system for avoiding radiation of a downhole casing optical cable for implementing the method for avoiding radiation of an optical cable comprises:
the positioning device is arranged at the position corresponding to the optical cable outside the sleeve and used for acquiring the position information of the positioning device and sending the position information to the optical cable;
the optical cable is arranged at each position on the sleeve and is used for receiving the position information sent by the positioning device in real time and sending the position information to the ground demodulation device;
the ground demodulation device is used for demodulating the information sent by the optical cable, acquiring the position information of the corresponding positioning device and further acquiring the position information of the corresponding optical cable;
and the information display device is used for displaying the optical cable position distribution information acquired by the ground demodulation device.
As shown in fig. 3, the positioning device in this embodiment includes a power supply unit, a location information sensing unit, an information transmission unit, and a main control unit; the position information sensing unit and the power supply unit are both connected with the main control unit, and the information transmission unit is connected with the main control unit through a driving circuit;
the power supply unit comprises a rechargeable battery and a power management circuit, and the rechargeable battery is connected with the main control unit through the power management circuit; the position information sensing unit comprises a three-axis gyroscope, a three-axis magnetic field sensor and a temperature sensor, and the temperature sensor is connected with the main control unit through a high-temperature operational amplifier circuit; the three-axis gyroscope simultaneously records the position, the moving track and the acceleration information in 6 directions of the current sleeve and uploads the information to the main control unit, the posture of the sleeve is resolved by combining the information uploaded by the magnetic field sensor, only the position of the sleeve is determined, and the information transmission unit is controlled to transmit the position information through the control driving circuit according to the position information; in addition, the temperature sensor measures the environment temperature, the ground temperature starts from three hundred meters, the temperature rises by about 3.3 ℃ every 100 meters of temperature drop, and the temperature is very high in a deep well, so that the temperature sensor can provide data reference for the depth of the casing in the well on one hand, and the temperature sensor is arranged in the main control unit on the other hand, and only when certain temperature (depth) is reached, the component modules of the system can start to work to achieve the purpose of energy conservation.
The information transmission unit in the embodiment is a sound production assembly, a heating assembly or an optical fiber assembly so as to meet the requirements of different use scenes;
specifically, when the information transmission unit is a sound production component, the corresponding ground demodulation device is a distributed optical fiber sound wave demodulation system; when the sounding component is variable-frequency, the sounding component monitors the position of the sounding component on the circumference of the sleeve in real time, codes the position information according to the set frequency change, and sends sound wave information containing the position information to the optical cable; when the sounding component sounds at a fixed frequency, coding is carried out at the fixed frequency, and sound wave information containing position information is sent to the optical cable; the distributed optical fiber sound wave demodulation system demodulates sound wave information sent by the optical cable, decodes the sound wave information and obtains position information of the sound generating device;
when the information transmission unit is a heating component, the corresponding ground demodulation device is a distributed optical fiber temperature demodulation system; the heating component monitors the position of the heating component on the circumference of the sleeve in real time, codes the position information according to the set frequency change, and sends temperature information containing the position information to the optical cable; such as converting the position information into some specific regular temperature variation information (representing its position on the circumference of the casing at a specific temperature, or representing its position on the circumference of the casing at a periodic temperature); the optical cable arranged on the sleeve receives the temperature information, the temperature information sent by the optical cable is demodulated by the distributed optical fiber temperature demodulation system, the temperature information is decoded to obtain the position information of the heating device, and then the position information of the optical cable on the sleeve is obtained.
When the information transmission unit is an optical fiber component, the corresponding ground demodulation device is a ground demodulation instrument; the optical fiber assembly monitors the position of the optical fiber assembly on the circumference of the sleeve in real time, sends the position information to an overground demodulation instrument through the optical cable, demodulates the position information of the optical fiber assembly on the circumference of the sleeve through an overground demodulation device, and further obtains the position information of the optical cable on the sleeve.
In the embodiment, before oil and gas production of the oil well, the fracturing technology is adopted to press the casing out of the crack, the optical cable can be damaged in the process, and the optical cable can be prevented from being damaged by obtaining the position information of the optical cable on the casing according to the structure. In addition, the optical cable provided by the invention is not only suitable for avoiding radiation of the optical cable on an oil well casing, but also suitable for other scenes needing optical cable positioning.
The invention has the beneficial effects that:
according to the system and the method for preventing the optical cable from being shot by the underground casing, the positioning device with the azimuth and attitude self-positioning function and the optical cable are arranged together in the process of descending the oil well casing, after the casing is arranged, the position information of the optical cable on the circumference of the casing is obtained through the positioning device, the optical cable is prevented from being damaged in the process of fracturing the oil well, the fracture risk of the optical cable is reduced, and the exploitation cost of the oil well is reduced; the optical cable on the sleeve is originally used for collecting information (temperature, pressure and the like) in the well, but is combined with the positioning device to position and protect the optical cable from being damaged, so that the use efficiency of the optical cable is improved, and a foundation is laid for oil well oil gas exploration by utilizing a light sensing technology subsequently.
Claims (9)
1. A method for avoiding radiation of an optical cable of a downhole casing is characterized by comprising the following steps:
s1, before the oil well casing is put into the well, the optical cable is attached to the casing, and a plurality of positioning devices are arranged at the positions corresponding to the optical cable on the casing;
s2, in the process of lowering the oil well casing into the well, sending self position information in real time through a positioning device, and receiving the position information through an optical cable;
s3, demodulating the position information received by the optical cable in real time through the ground demodulation device to obtain the position information corresponding to the positioning device, and further obtaining the position information corresponding to the optical cable;
s4, displaying the position distribution information of the optical cables through the information display device, and accurately pressing the sleeve based on the position distribution information to realize the shielding of the sleeve optical cable.
2. The method for avoiding radiation of a casing optical cable in a well according to claim 1, wherein in the step S1, the positioning device is arranged at a position corresponding to the optical cable outside the casing or inside the casing;
the positioning device in step S1 is a sound generating device, a heat generating device or an optical fiber device.
3. The method of claim 2, wherein when the positioning device is a sound generating device, the corresponding surface demodulation device is a distributed fiber acoustic demodulation system;
the sounding device monitors the position of the sounding device on the circumference of the sleeve in real time, when the sounding device can change frequency, the position information of the sounding device is coded according to the set frequency change, and sound wave information containing the position information is sent to the optical cable;
the distributed optical fiber sound wave demodulation system demodulates sound wave information sent by the optical cable, and decodes the sound wave information to obtain position information of the sound generating device.
4. The method of claim 2, wherein when the positioning device is a heating device, the corresponding surface demodulation device is a distributed optical fiber temperature demodulation system;
the heating device monitors the position of the heating device on the circumference of the sleeve in real time, codes the position information according to the set frequency change, and sends temperature information containing the position information to the optical cable;
the distributed optical fiber temperature demodulation system demodulates temperature information sent by the optical cable, and decodes the temperature information to obtain position information of the heating device.
5. The method of claim 2, wherein when the positioning device is an optical fiber device, the corresponding surface demodulation device is an above-ground demodulation instrument;
the optical fiber device monitors the position of the optical fiber device on the circumference of the sleeve in real time, sends the position information to the ground demodulation instrument through the optical cable, and demodulates the position information on the circumference of the sleeve through the ground demodulation device.
6. The method for avoiding radiation of the optical cable of the downhole casing according to claim 1, wherein the step S2 is specifically as follows: the position information of the self on the circumference of the sleeve is monitored in real time through a positioning device, and the position information is coded into a signal containing the position information of the self according to a set frequency change rule and transmitted to the optical cable.
7. A system for avoiding radiation of a downhole casing cable, comprising:
the positioning device is arranged at the position corresponding to the optical cable outside the sleeve and used for acquiring the position information of the positioning device and sending the position information to the optical cable;
the optical cable is used for receiving the position information sent by the positioning device in real time and sending the position information to the ground demodulation device;
the ground demodulation device is used for demodulating the information sent by the optical cable, acquiring the position information of the corresponding positioning device and further acquiring the position information of the corresponding optical cable;
and the information display device is used for displaying the optical cable position distribution information acquired by the ground demodulation device.
8. The underground casing optical cable radiation avoiding device as claimed in claim 7, wherein the positioning device comprises a power supply unit, a position information sensing unit, an information transmission unit and a main control unit; the position information sensing unit and the power supply unit are both connected with the main control unit, and the information transmission unit is connected with the main control unit through a driving circuit;
the power supply unit comprises a rechargeable battery and a power management circuit, and the rechargeable battery is connected with the main control unit through the power management circuit;
the position information sensing unit comprises a three-axis gyroscope, a three-axis magnetic field sensor and a temperature sensor, and the temperature sensor is connected with the main control unit through a high-temperature operational amplifier circuit.
9. The system of claim 8, wherein the information transmission unit is a sound component, a heat generating component, or a fiber optic component;
when the information transmission unit is a sounding component, the corresponding ground demodulation device is a distributed optical fiber sound wave demodulation system; when the sounding component is variable-frequency, the sounding component monitors the position of the sounding component on the circumference of the sleeve in real time, codes the position information according to the set frequency change, and sends sound wave information containing the position information to the optical cable; when the sounding component sounds at a fixed frequency, coding is carried out at the fixed frequency, and sound wave information containing position information is sent to the optical cable; the distributed optical fiber sound wave demodulation system demodulates sound wave information sent by the optical cable, decodes the sound wave information and obtains position information of the sound generating device;
when the information transmission unit is a heating component, the corresponding ground demodulation device is a distributed optical fiber temperature demodulation system; the heating component monitors the position of the heating component on the circumference of the sleeve in real time, codes the position information of the heating component according to the set frequency change, and sends temperature information containing the position information to the optical cable; the distributed optical fiber temperature demodulation system demodulates temperature information sent by the optical cable and decodes the temperature information to obtain position information of the heating device;
when the information transmission unit is an optical fiber component, the corresponding ground demodulation device is a ground demodulation instrument; the optical fiber assembly monitors the position of the optical fiber assembly on the circumference of the sleeve in real time, sends the position information to an overground demodulation instrument through an optical cable, and demodulates the position information on the circumference of the sleeve through an overground demodulation device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028293A (en) * | 2021-04-09 | 2021-06-25 | 吉林中科博能科技有限公司 | Oil pipeline convenient to real-time supervision |
| CN114837655A (en) * | 2022-05-24 | 2022-08-02 | 吉林瑞荣德能源科技有限公司 | Method and device for positioning oil and gas logging optical fiber |
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| CN114837655A (en) * | 2022-05-24 | 2022-08-02 | 吉林瑞荣德能源科技有限公司 | Method and device for positioning oil and gas logging optical fiber |
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