CN201397706Y - Four-core transmission coaxial cable - Google Patents
Four-core transmission coaxial cable Download PDFInfo
- Publication number
- CN201397706Y CN201397706Y CN2009201157480U CN200920115748U CN201397706Y CN 201397706 Y CN201397706 Y CN 201397706Y CN 2009201157480 U CN2009201157480 U CN 2009201157480U CN 200920115748 U CN200920115748 U CN 200920115748U CN 201397706 Y CN201397706 Y CN 201397706Y
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- CN
- China
- Prior art keywords
- copper
- pipe
- coaxial cable
- cable
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model relates to a four-core transmission coaxial cable, which comprises copper-clad steel, glass reinforced plastic pipes, copper pipes and a steel pipe. The four-core transmission coaxial cable is characterized in that the glass reinforced plastic pipes are arranged among the copper-clad steel, the copper pipe, the steel pipe and the copper pipe which are sequentially arrayed and coaxial. The four-core transmission coaxial cable can be used for an oil well logging instrument to transmit signals in multiple channels, has high temperature resistance and high pressure resistance, isfine in insulating property with different cores, and is particularly used for tiny signal transmission. Cable cores utilize different materials and different connection forms, keep self transmissionimpedance and insulating properties of different cable cores, maintain fine characteristics under a high-temperature and high-pressure environment, has pressure bearing capacity, and can also be utilized as a connector at a pressure bearing position.
Description
Affiliated technical field
The utility model relates to the transmission of a kind of oil well logging instrument multiple signals, high temperature high voltage resistant, different cable core good insulating, especially is fit to the four-core coaxial cable of tiny signal transmission.
Background technology
At present, the main mode of signal transmission is a cable, with regard to oil well logging instrument, because work under bad environment, need survey in the degree of depth of several kms in down-hole, certainly will require logger that very high heatproof and voltage endurance are arranged, and the signal of underground collection is very faint, need transmit by cable very little by transfer impedance and that antijamming capability is strong.
Tiny signal adopts lead and common cable in downhole transmitted, and very big impedance is arranged, and poor anti jamming capability.General cable self-characteristic under high temperature and high pressure environment changes greatly, influences the authenticity and the reliability of signal transmission.
The utility model content
In order to overcome the problem of oil well logging instrument signal transmission under HTHP, the utility model provides a kind of four-core transmission coaxial-cable, this coaxial cable not only can transmit tiny signal, and impedance is little, antijamming capability is strong and realize the intact transmission of signal down at high temperature (175 ℃) and high pressure (140MPa).Also can be used as the connector of pressure-bearing joint.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of four-core transmission coaxial-cable, it comprises copper covered steel, glass reinforced plastic pipe, copper pipe, steel pipe, it is characterized in that: arrange coaxial copper covered steel, copper pipe, steel pipe, plumbers shed in order glass reinforced plastic pipe is set.
According to the signal road number of the general needs transmission of oil well logging instrument, adopt the transmission of four-core coaxial cable, four-core is a concentricity.Adopt materials such as glass reinforced plastic pipe, copper pipe, steel pipe and copper covered steel according to characteristic, external diameter is φ 7.1mm, and length transmission range is as required determined.First core (internal layer) transmits signal and will get well, and requires resistance little, and intensity is big.The impedance of steel and iron is bigger than normal in the metal, and iron gets rusty easily, and the weldability of steel is also bad, and comprehensively its advantage has separately adopted the little copper covered steel material of high-frequency resistance.Second core requires impedance little, adopts copper product.The 3rd layer steel pipe, the magnetic field around the shielding, the electric field around the shielding of four-core (skin) copper pipe.
The beneficial effects of the utility model are, can transmit small-signal under high temperature and high pressure environment, and are little to the signal transmission attenuation, and shield effectiveness is good.Simultaneously also possess the pressure-bearing function, can be used for the electrical cnnector that two ends need the pressure-bearing place.
Description of drawings:
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a schematic diagram of the present utility model.
Illustrate: 1 is that copper covered steel, 2 is that glass reinforced plastic pipe, 3 is that copper pipe, 4 is that glass reinforced plastic pipe, 5 is that steel pipe, 6 is that glass reinforced plastic pipe, 7 is a copper pipe.
Embodiment
Further specify below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of four-core transmission coaxial-cable, it comprises copper covered steel 1, glass reinforced plastic pipe 2, copper pipe 3, steel pipe 5, it is characterized in that: arrange coaxial copper covered steel 1, copper pipe 3, steel pipe 5,7 of copper pipes in order glass reinforced plastic pipe 2,4,6 is set.
Claims (1)
1. four-core transmission coaxial-cable, it comprises copper covered steel, glass reinforced plastic pipe, copper pipe, steel pipe, it is characterized in that: arrange coaxial copper covered steel, copper pipe, steel pipe, plumbers shed in order glass reinforced plastic pipe is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201157480U CN201397706Y (en) | 2009-03-19 | 2009-03-19 | Four-core transmission coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201157480U CN201397706Y (en) | 2009-03-19 | 2009-03-19 | Four-core transmission coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201397706Y true CN201397706Y (en) | 2010-02-03 |
Family
ID=41620232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201157480U Expired - Fee Related CN201397706Y (en) | 2009-03-19 | 2009-03-19 | Four-core transmission coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201397706Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894611A (en) * | 2010-07-21 | 2010-11-24 | 郑州电缆有限公司 | High-temperature resistant wire tube double armature logging cable |
-
2009
- 2009-03-19 CN CN2009201157480U patent/CN201397706Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894611A (en) * | 2010-07-21 | 2010-11-24 | 郑州电缆有限公司 | High-temperature resistant wire tube double armature logging cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20150319 |
|
| EXPY | Termination of patent right or utility model |