CN204988594U - Tension protection sensor - Google Patents
Tension protection sensor Download PDFInfo
- Publication number
- CN204988594U CN204988594U CN201520478232.8U CN201520478232U CN204988594U CN 204988594 U CN204988594 U CN 204988594U CN 201520478232 U CN201520478232 U CN 201520478232U CN 204988594 U CN204988594 U CN 204988594U
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- CN
- China
- Prior art keywords
- sensor
- wheatstone bridge
- resistance
- wall tube
- tension force
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- 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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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Have the utility model discloses a tension protection sensor, it is mainly complicated to the tension nipple joint mechanical structure under the prior art, the low -response, sensitivity is low, can not accurately judge that the object of being hung is the cable or the problem of instrument, has provided one kind and set up resistance on the inner wall of sensor inner wall pipe to become wheatstone bridge with the ohmic connection, through the technical scheme of wheatstone bridge with the signal conversion one -tenth voltage variation signal of instrument atress. The utility model discloses whether tension sensor has simple structure, and the response is fast, and sensitivity is high, can tell the instrument easily and hung.
Description
Technical field
The utility model relates to a kind of tension force protection sensor, relates to a kind of used in oil well logging tension pick-up specifically.
Background technology
In oil well logging process, need the moment to pay close attention to the stressed situation of instrument and cable, so that judge down-hole situation at any time and take appropriate measures, under prior art, the junction of cable and instrument string adopts tension nipple to carry out the stressing conditions of monitoring instrument string, but existing tension nipple complicated in mechanical structure, stressed rear low-response, sensitivity is low, index is discrete, can not judge that down-hole is that card met by cable or card met by instrument in time, sometimes the judgement even causing staff to do making mistake and take measure improperly, cable is pulled off or instrument is fallen in well, have a strong impact on completing smoothly of well logging.
Utility model content
For the problems referred to above, the utility model provides a kind of tension force to protect sensor, accurately judges the stressing conditions of cable and instrument.
For achieving the above object, the utility model tension force protection sensor comprises sensor inner wall tube and is arranged on the crimping sensing circuit of sensor inner wall tube inside, and described crimping sensing circuit comprises a Wheatstone bridge, and described Wheatstone bridge comprises four brachium pontis; Described Wheatstone bridge has at least a brachium pontis to comprise resistance strain gage, and described resistance strain gage is arranged on the inwall of sensor inner wall tube; Described sensor inner wall tube is that the material with elastic deformation ability is made.
Particularly, the material with elastic deformation ability is steel or engineering plastics.
Further, described Wheatstone bridge is full-bridge.
Further, also comprise the sensor housing be set in outside described sensor inner wall tube, described sensor housing employing waterproof, resistance to more than 300 DEG C high-temperature materials are made.
Further, the two ends of described sensor inner wall tube are provided with waterproof, resistance to more than 300 DEG C High-temperature Packagings.
Further, described encapsulation is connected with cable, and water-proofing treatment is done in junction.
Further, described Wheatstone bridge is also connected with voltage signal amplifying signal amplifying circuit.
The utility model tension pick-up structure is simple, response is fast, highly sensitive, when instrument string is produced the change of resistance immediately during card, produce voltage change signal simultaneously, the stressing conditions of instrument string can be found timely, can avoid differentiating that cable is stressed or instrument is stressed and take the measure of mistake, cause well logging normally not carry out.
Accompanying drawing explanation
Fig. 1 is the preferred structural representation of the utility model tension pick-up;
Fig. 2 is the A-A cut-open view of this Fig. 1;
Fig. 3 is the Wheatstone bridge schematic diagram of the utility model tension pick-up;
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
Embodiment 1:
As shown in Figure 1-Figure 3: principle of the present utility model is according to Wheatstone bridge principle, four resistance are in turn connected into an annular, and between resistance R1 and R4, between R2 and R3, connect the both positive and negative polarity of power supply respectively, because the resistance of resistance meets R1/R2=R4/R3, so V
0value be 0, wherein, have one at least for resistance strain gage in four resistance, when strain occurs in the position that resistance strain gage is pasted, the resistance of resistance strain gage changes, and the change of resistance will cause voltage V
0change, according to V
0value just can judge stressed size.
The utility model tension pick-up comprises sensor inner wall tube 2, sensor inner wall tube 2 is made up of the material with elastic deformation ability, the inwall of sensor inner wall tube 2 is provided with 4 resistance strain gages 3, four resistance strain gages 3 connect into Wheatstone bridge, four resistance strain gages 3 respectively as Wheatstone bridge four brachium pontis, resistance when four resistance strain gages 3 are initial is identical, remains the balance of Wheatstone bridge; When sensor inner wall tube 2 is stressed, sensor inner wall tube 2 can produce deformation, and limit occurs the resistance being now pasted onto the resistance strain gage 3 on sensor inner wall tube 2 inwall, and the change of arbitrary resistance strain gage 3 resistance all will cause voltage V
0change, simultaneously voltage V
0size by relevant to the change in resistance of resistance strain gage 3, and the change in resistance of resistance strain gage 3 and the deformation of sensor inner wall tube 2 have direct relation, so voltage V
0can as the foundation judging stressing conditions.
For embodiment 1, Wheatstone bridge can adopt 1/4 electric bridge, namely only arranges a resistance strain gage in four resistance, and the strain of the position that the resistance of resistance strain gage is pasted with it changes.
For embodiment 1, Wheatstone bridge can adopt 1/2 electric bridge.
For above-described embodiment, the outside of sensor inner wall tube 2 is also provided with sensor housing 1, and sensor housing 1 is made for resistance to more than 300 DEG C high temperature, waterproof materials.
For above-described embodiment, the two ends of sensor inner wall tube 2 are provided with waterproof, high temperature resistant more than 300 DEG C encapsulation 4.
For above-described embodiment, cable 5 is connected with encapsulation 4, and water-proofing treatment is done in junction.
For above-described embodiment, Hui Sideng circuit is also connected with amplifying circuit, and the voltage signal of Wheatstone bridge amplifies by amplifying circuit, judges whether instrument is tangled so that convenient.
Above; be only preferred embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, the protection domain that protection domain of the present utility model should define with claim is as the criterion.
Claims (6)
1. a tension force protection sensor, is characterized in that: comprise sensor inner wall tube and the crimping sensing circuit being arranged on sensor inner wall tube inside, described crimping sensing circuit comprises a Wheatstone bridge, and described Wheatstone bridge comprises four brachium pontis; Described Wheatstone bridge has at least a brachium pontis to comprise resistance strain gage, and described resistance strain gage is arranged on the inwall of sensor inner wall tube; Described sensor inner wall tube is that the material with elastic deformation ability is made.
2. tension force protects sensor as claimed in claim 1, it is characterized in that: described Wheatstone bridge is full-bridge.
3. tension force protects sensor as claimed in claim 1, it is characterized in that: also comprise the sensor housing be set in outside described sensor inner wall tube, and described sensor housing adopts waterproof, resistance to more than 300 DEG C high-temperature materials are made.
4. tension force protects sensor as claimed in claim 1, it is characterized in that: the two ends of described sensor inner wall tube are provided with waterproof, resistance to more than 300 DEG C High-temperature Packagings.
5. tension force protects sensor as claimed in claim 4, it is characterized in that: described encapsulation is connected with cable, and water-proofing treatment is done in junction.
6. tension force protects sensor as claimed in claim 1, it is characterized in that: described Wheatstone bridge is also connected with voltage signal amplifying signal amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520478232.8U CN204988594U (en) | 2015-07-06 | 2015-07-06 | Tension protection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520478232.8U CN204988594U (en) | 2015-07-06 | 2015-07-06 | Tension protection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204988594U true CN204988594U (en) | 2016-01-20 |
Family
ID=55122952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520478232.8U Expired - Fee Related CN204988594U (en) | 2015-07-06 | 2015-07-06 | Tension protection sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204988594U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927433A (en) * | 2020-09-09 | 2020-11-13 | 中国石油天然气集团有限公司 | Over-current tension nipple joint and over-current tension magnetic positioning logging instrument |
-
2015
- 2015-07-06 CN CN201520478232.8U patent/CN204988594U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927433A (en) * | 2020-09-09 | 2020-11-13 | 中国石油天然气集团有限公司 | Over-current tension nipple joint and over-current tension magnetic positioning logging instrument |
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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: 20160120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |