CN1358990A - Magnetic-sensitive detecting method for judging oil well steel sleeve stress distribution - Google Patents
Magnetic-sensitive detecting method for judging oil well steel sleeve stress distribution Download PDFInfo
- Publication number
- CN1358990A CN1358990A CN 01138879 CN01138879A CN1358990A CN 1358990 A CN1358990 A CN 1358990A CN 01138879 CN01138879 CN 01138879 CN 01138879 A CN01138879 A CN 01138879A CN 1358990 A CN1358990 A CN 1358990A
- Authority
- CN
- China
- Prior art keywords
- steel sleeve
- oil well
- subsurface equipment
- stress
- magneto
- 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.)
- Granted
Links
Images
Abstract
Said invention method can utilize measurement of magnetic conductivity change of steel casing pipe under the action of external force of directly detect internal stress change of casing pipe, so that before the steel casing pipe produces plastic deformation, it can give out related information so as to can prevent the production of casing failure, specially layer failure. Said invention possesses the advanced forecasting prediction function, so that it can effectively reduce maintenance and can reduce production cost.
Description
The present invention relates to a kind of magnetic-sensitive detecting method of in oilfield process, judging oil well steel sleeve stress distribution situation.The instrument cable that will have a plurality of magneto-dependent sensors is exactly put into well specifically, with mechanical arm it is pushed against on the casing wall of oil well, in order to the STRESS VARIATION of measurement steel sleeve under the effect of external force, thereby judge the possibility that oil well steel sleeve is damaged.
Judge that at present the oil well casing method of being damaged has several: they are multi-finger caliper device, pipe analysis tool and underground ultrasonic ripple TV etc., have in addition and utilize sound wave to carry out the methods such as stress prediction on stratum.But preceding several method all is the steel sleeve at oil well be damaged or the situation of deformation under just can measure for information about, certainly will cause irreparable damage to the user like this.Though utilize the sound wave method that the function of reservoir stress prediction is also arranged, it is a kind of indirect measurement method, also needs the help of other ways and means, and cost height, cycle are longer.
The purpose of this invention is to provide the method that a kind of new judgement oil well casing is damaged, the variation of steel sleeve magnetic permeability directly detects the method that the steel sleeve internal stress changes under the effect of external force by measuring, it just can be provided for information about before the change of plasticity type takes place shows, really reach the degree of prediction, so that geomatics engineer is in time adjusted injection-production program, thereby avoid overlapping the generation that damage is overlapped the damage accident especially in flakes, reduced the field produces cost.
Main technical schemes of the present invention is, utilize the ferromagnetic characteristic of oil well steel sleeve, a subsurface equipment 3 that has a plurality of magneto-dependent sensors 7 is put into oil well 8, directly measure the variation of steel sleeve 9 tested measuring point place magnetic permeabilities under the effect of external force, judge according to this and predict the possibility that oil well steel sleeve is damaged.The used device of this method is made up of ground numerical control logging instrumentation car 1, cable 2 and subsurface equipment 3 etc.Subsurface equipment 3 is made up of controller 4, aspect sensor 5, telescoping ram 6, sway brace 10 and magneto-dependent sensor 7 etc.Wherein the sensitive area of magneto-dependent sensor 7 (with the contacted surface of check point) is designed to the cylindrical shape that matches with tube inner wall.Earlier subsurface equipment 3 is put into oil well 8 during construction, by 1 control of ground numerical control logging instrumentation car a plurality of magneto-dependent sensors 7 are pushed against on the inwall of steel sleeve 9, make its good contact, at first measure the primary curve of one group of steel sleeve stress distribution, measure one group of steel sleeve distribution curve of stress again with subsurface equipment 3 after the certain interval of time then, both contrast the STRESS VARIATION situation that can judge same interval through data, can draw the monitoring and prediction that oil well casing may be damaged in view of the above.Also can be fixed on subsurface equipment 3 the STRESS VARIATION information of enterprising this point of line time continuous coverage of some certain location, decrease situation with its cover of judging this section.
Its principle is: the change of direction of magnetization can cause the change of spacing of lattice in the medium in the ferromagnetics magnetic domain, thus the magnetic history of being accompanied by, the change of length and volume can take place in ferromagnet, and this phenomenon of variation that causes material internal stress simultaneously is magnetostriction.Same reason, when having internal stress in the ferromagnetic object, the migration of its magnetic domain can be subjected to certain influence, change along with the change of the size and Orientation of internal stress thereby show as its magnetic permeability, therefore both can measure oil well steel sleeve stress distribution situation easily with a magneto-dependent sensor that can detect the variation of ferromagnetic material magnetic permeability.By to repeatedly measurement data (or the data of uniformly-spaced gathering continuous time) contrast, just can judge steel sleeve each point STRESS VARIATION situation in the oil well, thereby may overlap the monitoring and prediction of damage for producing well.
The present invention compares the advantage with leading monitoring and prediction with the methods such as multi-finger caliper device, pipe analysis tool and underground ultrasonic ripple TV that use in present oil field with instrument, the former only is damaged and just can measures the result, and then take the repairing measure, the present invention is owing to have the function of leading monitoring and prediction, guides user is adjusted production decision, therefore can reduce economic loss of user widely, individual well reduce maintenance and stop production cause with a toll of hundreds thousand of units.Compare with the reservoir stress prediction of sound wave method, it is to become to be measured as direct measurement indirectly, and measuring accuracy obviously improves, and construction cost is low.
Fig. 1 is test philosophy figure of the present invention.1 is ground numerical control logging instrumentation car, the 2nd, cable, the 3rd, subsurface equipment, the 8th, oil well, the 9th, the borehole wall (steel sleeve); Subsurface equipment 3 is made up of controller 4, aspect sensor 5, telescoping ram 6, sway brace 10 and magneto-dependent sensor 7, and wherein the sensitive area of magneto-dependent sensor 7 (with the contacted surface of check point) is designed to the cylindrical shape that matches with tube inner wall.
Realize embodiments of the invention as shown in Figure 1, earlier subsurface equipment 3 is put into oil well 8 during construction with cable, by 1 control of ground numerical control logging instrumentation car a plurality of magneto-dependent sensors 7 are pushed against on the inwall of steel sleeve 9, make its good contact, promote subsurface equipment 3 with winch then, at first measure the primary curve of one group of steel sleeve stress distribution, measure one group of steel sleeve distribution curve of stress again with subsurface equipment 3 again after the certain interval of time, both contrast the STRESS VARIATION situation that can judge same interval steel sleeve through data, the position that stress increases is indicating that cover may take place to be decreased, and aspect sensor 5 has wherein provided the concrete orientation of each magneto-dependent sensor 7.Can draw relevant data and information that oil well casing may be damaged in view of the above, and then provide the prediction that the cover damage takes place steel sleeve.Also can be fixed on subsurface equipment 3 and carry out the STRESS VARIATION information that long-time continuous is measured this section steel sleeve on some certain location, decrease situation with its cover of judging this section.
Claims (2)
1, a kind of magnetic-sensitive detecting method of judging oil well steel sleeve stress distribution situation, it is characterized in that this method is to utilize the ferromagnetic characteristic of oil well steel sleeve, a subsurface equipment (3) that has magneto-dependent sensor (7) is put into oil well (8), directly measure the variation of the tested measuring point of steel sleeve (9) place magnetic permeability under the effect of external force, judge according to this and predict the possibility that oil well steel sleeve (9) is damaged; The used device of this method is made up of ground numerical control logging instrumentation car (1), cable (2) and subsurface equipment (3) etc.; Subsurface equipment (3) is made up of controller (4), aspect sensor (5), telescoping ram (6) and magneto-dependent sensor (7) etc.; Earlier subsurface equipment (3) is put into oil well (8) during measurement, by ground numerical control logging instrumentation car (1) control magneto-dependent sensor (7) is pushed against on the borehole wall (9), make its good contact, at first measure the primary curve of a steel sleeve stress distribution, measure a steel sleeve distribution curve of stress again with subsurface equipment (3) after the certain interval of time then, both contrast the STRESS VARIATION situation that can judge same interval through data, can draw the monitoring and prediction that oil well casing may be damaged in view of the above; Also can be fixed on the sensor of subsurface equipment (3) (7) and carry out the STRESS VARIATION information that long-time continuous is measured this position on some certain location, decrease situation with its cover of judging this section.
2, a kind of magnetic-sensitive detecting method of judging oil well steel sleeve stress distribution situation according to claim 1, it is characterized in that magneto-dependent sensor (7) is designed to change responsive to the magnetic permeability of ferromagnetic material, its sensitive area (with the contacted surface of check point) is cylinder or the spherical shape that matches with tube inner wall, thereby guarantees that sensor can evenly equidistantly contact with steel sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138879 CN1267714C (en) | 2001-12-18 | 2001-12-18 | Magnetic-sensitive detecting method for judging oil well steel sleeve stress distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138879 CN1267714C (en) | 2001-12-18 | 2001-12-18 | Magnetic-sensitive detecting method for judging oil well steel sleeve stress distribution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1358990A true CN1358990A (en) | 2002-07-17 |
| CN1267714C CN1267714C (en) | 2006-08-02 |
Family
ID=4674831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01138879 Expired - Fee Related CN1267714C (en) | 2001-12-18 | 2001-12-18 | Magnetic-sensitive detecting method for judging oil well steel sleeve stress distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1267714C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325902C (en) * | 2003-05-10 | 2007-07-11 | 大庆油田有限责任公司 | Ground vibration detecting method for casing damage |
| CN102022111B (en) * | 2009-09-22 | 2013-06-05 | 贵州航天凯山石油仪器有限公司 | Method for detecting azimuth of damaged oilfield downhole casing |
| CN112985647A (en) * | 2021-02-08 | 2021-06-18 | 天津大学 | Pipeline bending stress detection device |
| CN113638732A (en) * | 2020-04-23 | 2021-11-12 | 中国石油天然气股份有限公司 | Method and device for judging casing damage of oil well |
-
2001
- 2001-12-18 CN CN 01138879 patent/CN1267714C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325902C (en) * | 2003-05-10 | 2007-07-11 | 大庆油田有限责任公司 | Ground vibration detecting method for casing damage |
| CN102022111B (en) * | 2009-09-22 | 2013-06-05 | 贵州航天凯山石油仪器有限公司 | Method for detecting azimuth of damaged oilfield downhole casing |
| CN113638732A (en) * | 2020-04-23 | 2021-11-12 | 中国石油天然气股份有限公司 | Method and device for judging casing damage of oil well |
| CN113638732B (en) * | 2020-04-23 | 2024-03-01 | 中国石油天然气股份有限公司 | Method and device for judging oil well casing damage |
| CN112985647A (en) * | 2021-02-08 | 2021-06-18 | 天津大学 | Pipeline bending stress detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1267714C (en) | 2006-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104061902B (en) | Combined type underground deep disaster monitoring device | |
| EP3625437B1 (en) | Pre-cast segment for tunnels and method for producing and monitoring said pre-cast segment | |
| CN103278384B (en) | Testing device and measuring method for anchorage performance of coal and rock mass in coal mine tunnel | |
| CN102839693B (en) | Increase resistive shape anchor pole/anchorage cable anchoring quality monitoring device and application process | |
| CN105318824B (en) | A kind of method that wall rock loosening ring is measured based on distributed resistance foil gauge | |
| CN205607577U (en) | Adhere to formula suo li detection device | |
| CN108279037A (en) | A kind of method for arranging of underground railway track structure real-time monitoring system | |
| US10301929B2 (en) | System and method for leak detection | |
| US9631474B2 (en) | Systems and methods for real-time evaluation of coiled tubing matrix acidizing | |
| CN109763850A (en) | A kind of intelligent grouting cable anchor and its detection method | |
| CN103411713B (en) | Wide range is based on the reinforcing steel corrosion monitoring sensor of fiber grating sensing technology | |
| CN112814741A (en) | Roadway surrounding rock displacement-stress-fracture state integrated testing device and method | |
| Xu et al. | Surface crack detection in Prestressed concrete cylinder pipes using BOTDA strain sensors | |
| CN203310698U (en) | Coal mine tunnel coal-rock mass anchoring performance testing device | |
| CN1267714C (en) | Magnetic-sensitive detecting method for judging oil well steel sleeve stress distribution | |
| US8353205B2 (en) | Measuring apparatus with AE sensor, installing method thereof, and set of the measuring apparatus | |
| CN103528494B (en) | A kind of current vortex time deformation measuring device | |
| CN205562101U (en) | Cable suo li changes testing arrangement | |
| Dowding et al. | Water pressure measurement with time domain reflectometry cables | |
| CN202281762U (en) | Construction quality detection device for pile foundation | |
| CN106770481A (en) | Bridge sling monitors sensor | |
| CN201060097Y (en) | Continuance pipe multi-axis combined load low-cycle fatigue tester | |
| CN206270275U (en) | A kind of bridge sling monitors sensor | |
| CN107142822B (en) | A kind of roadbed cavity detection device and its detection method | |
| CN216246921U (en) | Stress sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060802 Termination date: 20191218 |