CN201322740Y - Eddy current case damage detecting device for improving circumferential defect detection rate - Google Patents
Eddy current case damage detecting device for improving circumferential defect detection rate Download PDFInfo
- Publication number
- CN201322740Y CN201322740Y CNU2008202116820U CN200820211682U CN201322740Y CN 201322740 Y CN201322740 Y CN 201322740Y CN U2008202116820 U CNU2008202116820 U CN U2008202116820U CN 200820211682 U CN200820211682 U CN 200820211682U CN 201322740 Y CN201322740 Y CN 201322740Y
- Authority
- CN
- China
- Prior art keywords
- electromagnetic sensor
- sensor probe
- transverse
- probe
- eddy current
- 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
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model relates to an eddy current case damage detecting device for improving circumferential defect detection rate, which mainly solves the problem that the prior through-tubing low-frequency eddy current case damage detecting device has low circumferential defect detection rate for a small-diameter and seriously-deformed case. The eddy current case damage detecting device is characterized in that two electromagnetic transducer probes which are vertical to an instrument axial line and perpendicular to each other are fixed in a titanium steel outer cylinder (13) between a control and signal-processing circuit board (10) and an excitation circuit board (12); the two electromagnetic transducer probes are respectively called as a transversal electromagnetic transducer probe B (5) and a transversal electromagnetic transducer probe D (6); and the two transversal electromagnetic transducer probes are close to each other. The eddy current case damage detecting device enlarges the probe range, ensures the circumferential defect detection rate, reduces the circumferential defect detection omission rate and increases the sensitivity for circumferential defect detection; in addition, the eddy current case damage detecting device increases the excitation frequency of the added transversal probes, thus strengthening the resolution for fractures and holes and being favorable for the detection for short and narrow fractures and small-size holes.
Description
Technical field:
The utility model relates to a kind of oil field cover of being applied to and decreases pick-up unit in the detection range, relate to specifically a kind of can be simultaneously to the damaged magnetic well logging device that effectively detects of the inside and outside wall of down-hole casing.
Background technology:
Decreasing in the detection range at present oil field cover, can be oil pipe low frequency eddy current cover damage detecting instrument to the damaged magnetic logger that effectively detects of down-hole casing inside and outside wall simultaneously, and this detector can be to being out of shape damaged detection of sleeve pipe serious, that latus rectum is little.But by using for a long time, there are the following problems to find this well logger: be used to survey the damaged transversal sonde of sleeve circumferential in this instrument and have only one, limited coverage area, and for circumferentially damaged on the sleeve pipe, be circumferential crack or local hole, mainly detected by transversal sonde, therefore, the circumferential damaged verification and measurement ratio of this instrument is lower.In addition, its excitation frequency has only 2.5Hz, is difficult to distinguish the damaged of reduced size, and on probe was made, it is improper that framework material, core material are selected for use, and the thermal stability of probe inductance parameters is relatively poor, all aggravates the reduction of the circumferential damaged verification and measurement ratio of this kind instrument.
The utility model content:
In order to solve the low problem of existing the oil pipe low frequency eddy current cover circumferential damaged verification and measurement ratio of damage detecting instrument, the utility model provides a kind of eddy current cover damage detecting instrument that improves circumferential damaged verification and measurement ratio, this kind eddy current cover damage detecting instrument has increased investigative range, guaranteed circumferential damaged verification and measurement ratio, reduced circumferential damaged loss, the sensitivity of damaged detection also has been improved.In addition, this instrument has improved the excitation frequency of the transversal sonde that increases, and the resolution enhancing to crack, hole helps the detection of weak point, narrow crack and small size hole.
The technical solution of the utility model is: this kind improves the eddy current cover damage detecting instrument of circumferential damaged verification and measurement ratio, comprise centralizer, the probe circuit short circuit, following centralizer, power supply changeover device, circuit board for receiving, control and signal processing circuit board, stainless steel stent, the exciting circuit plate, the titanium steel urceolus, logging cable interface and the vertical electromagnetic sensor probe A and the vertical electromagnetic sensor probe C that distribute along the instrument axis, in addition, in described titanium steel urceolus, between control and signal processing circuit board and exciting circuit plate, being fixed with two places perpendicular to the instrument axis, the electromagnetic sensor probe that is an angle of 90 degrees each other, be called transverse-electromagnetic sensor probe B and transverse-electromagnetic sensor probe D, described two transverse-electromagnetic sensor probes are close mutually.Wherein, be spaced apart 300 millimeters between described vertical electromagnetic sensor probe A and the transverse-electromagnetic sensor probe B, be spaced apart 5 millimeters between transverse-electromagnetic sensor probe B and the transverse-electromagnetic sensor probe D, be spaced apart 600 millimeters between transverse-electromagnetic sensor probe D and the vertical electromagnetic sensor probe C.
The utlity model has following beneficial effect: owing to take such scheme, wherein vertically the electromagnetic sensor probe distributes along the instrument axis, survey longitudinal crack on the sleeve pipe, the large tracts of land wall thickness reduction, and two transverse-electromagnetic sensor probes are perpendicular to the instrument axis, be 90 ° each other, mutually near placing, with what guarantee to survey as far as possible is " same " position, finish the damaged detection of sleeve circumferential jointly by 2 transverse-electromagnetic sensor probes, enlarged circumferential damaged investigative range, avoided direct to each other coupled interference, increased investigative range, guaranteed circumferential damaged verification and measurement ratio, reduced circumferential damaged loss, the sensitivity of damaged detection also has been improved.In addition, this instrument has improved the excitation frequency of the transversal sonde that increases, and the resolution enhancing to crack, hole helps the detection of weak point, narrow crack and small size hole.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is vertical electromagnetic sensor probe A structural representation in the utility model instrument.
Fig. 3 is vertical electromagnetic sensor probe C-structure synoptic diagram in the utility model instrument.
Fig. 4 is a transverse-electromagnetic sensor probe structural representation in the utility model instrument.
Fig. 5 is the utility model principle of work block diagram.
1-goes up centralizer, 2-probe circuit short circuit, centralizer under the 3-among the figure, the vertical electromagnetic sensor probe A of 4-, 5-transverse-electromagnetic sensor probe B, the vertical electromagnetic sensor probe of 6-C, 7-transverse-electromagnetic sensor probe D, the 8-power supply changeover device, the 9-circuit board for receiving, 10-control and signal processing circuit board, 11-stainless steel stent, 12-exciting circuit plate, 13-titanium steel urceolus, 14-logging cable interface, a-probe A cylinder-shaped iron core, the cylindrical skeleton of b-probe A, c-probe A drive coil, the d-receiving coil of popping one's head in, e-probe C cylinder-shaped iron core, the cylindrical skeleton of f-probe C, g-probe C drive coil, h-probe C receiving coil, i-probe B, the square iron core of D, the j-probe B, the square skeleton of D, the k-probe B, the D drive coil.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, this kind improves the eddy current cover damage detecting instrument of circumferential damaged verification and measurement ratio, comprising centralizer 1, probe circuit short circuit 2, centralizer 3, power supply changeover device 8, circuit board for receiving 9, control and signal processing circuit board 10, stainless steel stent 11, exciting circuit plate 12, titanium steel urceolus 13, logging cable interface 14 and the vertical electromagnetic sensor probe A that distributes along the instrument axis and vertical electromagnetic sensor probe C down, more than be the apokoinou construction that conventional eddy current overlaps damage detecting instrument.The special character of this programme is: in described titanium steel urceolus 13, between control and signal processing circuit board 10 and exciting circuit plate 12, be fixed with two electromagnetic sensor probes of placing, be each other an angle of 90 degrees perpendicular to the instrument axis, be called transverse-electromagnetic sensor probe B and transverse-electromagnetic sensor probe D, described two transverse-electromagnetic sensor probes are close mutually.Be optimal design more, should make and be spaced apart 300 millimeters between described vertical electromagnetic sensor probe A and the transverse-electromagnetic sensor probe B, be spaced apart 5 millimeters between transverse-electromagnetic sensor probe B and the transverse-electromagnetic sensor probe D, be spaced apart 600 millimeters between transverse-electromagnetic sensor probe D and the vertical electromagnetic sensor probe C.
Wherein, upper and lower centralizer is the general centralizer of reference rounds reed-type well logger, can make the probe circuit short circuit placed in the middle in sleeve pipe by it, and simultaneously, last centralizer one end still is the interface of instrument and logging cable.Probe circuit short circuit outside is a high-intensity titanium steel material cylinder, includes a stainless steel stent, and instrument probe, power supply changeover device, excitation, reception and control-signal processing circuit board are installed on the support.Power supply changeover device is commercial power module, and it converts the logging cable power supply to instrument required various voltages.Excitation, circuit board for receiving provide exciting current for probe, and receiving transducer secondary coil induced signal.Control-treatment circuit provides the instrument work schedule and handles probe secondary coil received signal, forms final output signal, is uploaded to uphole equipment through logging cable.
During concrete the making, the electromagnetic sensor probe is by band center pit skeleton, 2 groups of coils on the same skeleton--and-drive coil and receiving coil and the iron core that inserts in the frame center hole are formed.A, C sonde configuration are similar, are respectively the cylindrical-shaped structure shown in Fig. 2,3, use cylinder-shaped iron core, and just more greatly, the probe A drive coil number of turn is 600 to the length of probe A, the about 1200 μ H of inductance, the receiving coil number of turn 1500 circles, the about 4mH of inductance than probe C.The probe C drive coil number of turn 300, the about 500 μ H of inductance, the receiving coil number of turn is 800 circles, the about 2mH of inductance.Probe B, D structure are identical, and as shown in Figure 4, iron core is the square shape, their drive coil numbers of turn 450, and the about 1000 μ H of inductance, the receiving coil number of turn is 1000 circles, about inductance 3mH.For the temperature drift of the inductance that reduces to pop one's head in, reduce probe to little damaged loss, probe A, B, C, D framework material all can be selected low-thermal-expansion rate teflon material for use, and iron core then is the silicon steel material of low-temperature coefficient.In order to improve the sensitivity of probe, the excitation frequency of probe B, D is brought up to 5Hz by 2.5Hz to circumferential damaged detection.
Scheme after this kind of improvement, with respect to crossing for the oil pipe low frequency eddy current cover damage detecting instrument of routine, because the laterally increase of device probe quantity, and the suitable raising of excitation frequency, solved the low problem of the damaged verification and measurement ratio of sleeve circumferential preferably.After testing, the detection sensitivity of circumferential crack is brought up to 1/8 circumference by 1/3 original circumference, has improved nearly 2 times, and the minimum fracture width of detection is reduced to 1.0mm by original 1.5mm, and single cavity detection ability is brought up to Φ 10mm by Φ 30mm.In addition, what the former eddy current of oil pipe low frequency excessively cover damage detecting instrument probe used is the higher big manganese-zinc ferrite core of duralumin skeleton, temperature coefficient of coefficient of thermal expansion, when variation of ambient temperature, skeleton is because of thermal volume expansion changes, the variation of magnetic core magnetic permeability will cause popping one's head in, and inductance changes, this variation can be covered little damaged induction reactance response to probe, influences little damaged detection.The probe skeleton is selected low-thermal-expansion rate teflon material for use in this programme, and iron core then is the silicon steel material of low-temperature coefficient, and magnetic permeability varies with temperature very little, and the temperature drift rate of probe inductance has reduced nearly 9 times, has improved probe to little damaged recall rate.In this programme, 2 transversal sondes that are used for circumferential damaged detection are 90 ° of placements each other, in theory, instrument has also increased by 1 times to circumferential damaged investigative range, in fact because the coupling between probe B, D and sleeve pipe, investigative range is greater, thereby has reduced circumferential damaged loss.Detect principle as can be known by electromagnetic eddy, under certain condition, the probe excitation frequency is high more, and is also high more to the sensitivity of damaged detection.And this programme will be popped one's head in excitation frequency by the 2.5Hz of former instrument, bring up to 5Hz, and the resolution of crack, hole is strengthened, and help the detection of short, narrow crack and small size hole.
Fig. 5 is the utility model principle of work block diagram, this instrument detects principle design based on electromagnetic eddy, during instrument work, pass through probe A, B, C, the drive coil of D produces electric magnetization, in sleeve pipe, inspire vortex flow, this vortex flow can be subjected to damaged on the tube wall " modulation ", the secondary magnetic field that is produced by the vortex flow of " modulation " has also just comprised these " modulation " information certainly, the probe receiving coil receives this secondary magnetic field, induce voltage signal, demodulate original " modulation " information, convert unified output signal then to through processing of circuit, be sent to ground through cable, further analyze the damage information that obtains sleeve pipe.
Claims (3)
1, a kind of eddy current cover damage detecting instrument that improves circumferential damaged verification and measurement ratio, comprise centralizer (1), probe circuit short circuit (2), following centralizer (3), power supply changeover device (8), circuit board for receiving (9), control and signal processing circuit board (10), stainless steel stent (11), exciting circuit plate (12), titanium steel urceolus (13), logging cable interface (14) and the vertical electromagnetic sensor probe A (4) and the vertical electromagnetic sensor probe C (6) that distribute along the instrument axis, it is characterized in that: in described titanium steel urceolus (13), be positioned between control and signal processing circuit board (10) and the exciting circuit plate (12), being fixed with two places perpendicular to the instrument axis, the electromagnetic sensor probe that is an angle of 90 degrees each other, be called transverse-electromagnetic sensor probe B (5) and transverse-electromagnetic sensor probe D (6), described two transverse-electromagnetic sensor probes are close mutually.
2, a kind of eddy current cover damage detecting instrument that improves circumferential damaged verification and measurement ratio according to claim 1, it is characterized in that: be spaced apart 300 millimeters between described vertical electromagnetic sensor probe A (4) and the transverse-electromagnetic sensor probe B (5), be spaced apart 5 millimeters between transverse-electromagnetic sensor probe B (5) and the transverse-electromagnetic sensor probe D (6), be spaced apart 600 millimeters between transverse-electromagnetic sensor probe D (6) and the vertical electromagnetic sensor probe C (6).
3, a kind of eddy current cover damage detecting instrument that improves circumferential damaged verification and measurement ratio according to claim 2, it is characterized in that: the framework material of described vertical electromagnetic sensor probe A (4), transverse-electromagnetic sensor probe B (5), vertical electromagnetic sensor probe C (6), transverse-electromagnetic sensor probe D (6) is the teflon of low-thermal-expansion rate, iron core is the silicon steel of low-temperature coefficient, and described transverse-electromagnetic sensor probe B (5) is 5 hertz with the excitation frequency of transverse-electromagnetic sensor probe D (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202116820U CN201322740Y (en) | 2008-12-12 | 2008-12-12 | Eddy current case damage detecting device for improving circumferential defect detection rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202116820U CN201322740Y (en) | 2008-12-12 | 2008-12-12 | Eddy current case damage detecting device for improving circumferential defect detection rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201322740Y true CN201322740Y (en) | 2009-10-07 |
Family
ID=41160119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202116820U Expired - Fee Related CN201322740Y (en) | 2008-12-12 | 2008-12-12 | Eddy current case damage detecting device for improving circumferential defect detection rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201322740Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313777A (en) * | 2011-07-26 | 2012-01-11 | 电子科技大学 | Detection apparatus for defects of inner and outer walls of pipeline based on remote field eddy current testing |
| WO2014035285A1 (en) * | 2012-08-31 | 2014-03-06 | Tgt Oil And Gas Services Fze | A method of electromagnetic defectoscopy for multi-string wells and the electromagnetic downhole defectoscope. |
| CN104733863A (en) * | 2015-02-09 | 2015-06-24 | 中国石油天然气集团公司 | Cross-well electromagnetism logging instrument emitter and emitting antenna thereof |
| CN108760875A (en) * | 2018-05-18 | 2018-11-06 | 广东省特种设备检测研究院珠海检测院 | A kind of portable tape clad stress metal pipeline-weld positioning device and localization method |
| CN108872374A (en) * | 2018-09-19 | 2018-11-23 | 电子科技大学 | A kind of device based on electromagnetic eddy detection inner and outer walls of pipeline defective locations |
| US10260854B2 (en) | 2016-12-07 | 2019-04-16 | Probe Technology Services, Inc. | Pulsed eddy current casing inspection tool |
| CN110397434A (en) * | 2019-07-01 | 2019-11-01 | 大庆油田有限责任公司 | A kind of well bore situation imaging logging instrument and logging method |
| CN111749637A (en) * | 2020-06-19 | 2020-10-09 | 中国石油天然气股份有限公司 | Instrument and method for detecting lost fish head through electromagnetic scanning |
| CN112415088A (en) * | 2020-11-03 | 2021-02-26 | 南昌航空大学 | Inner-through transverse pulse eddy current detection probe and use method thereof |
| CN114216840A (en) * | 2022-01-12 | 2022-03-22 | 中国科学院武汉岩土力学研究所 | Distributed real-time monitoring system for casing corrosion |
-
2008
- 2008-12-12 CN CNU2008202116820U patent/CN201322740Y/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313777B (en) * | 2011-07-26 | 2013-06-05 | 电子科技大学 | Detection apparatus for defects of inner and outer walls of pipeline based on remote field eddy current |
| CN102313777A (en) * | 2011-07-26 | 2012-01-11 | 电子科技大学 | Detection apparatus for defects of inner and outer walls of pipeline based on remote field eddy current testing |
| GB2513019B (en) * | 2012-08-31 | 2018-05-02 | Obschestvo S Ogranichennoy Otvetstvennostyu Miks | A method of electromagnetic defectoscopy for multi-string wells and the electromagnetic downhole defectoscope |
| WO2014035285A1 (en) * | 2012-08-31 | 2014-03-06 | Tgt Oil And Gas Services Fze | A method of electromagnetic defectoscopy for multi-string wells and the electromagnetic downhole defectoscope. |
| GB2513019A (en) * | 2012-08-31 | 2014-10-15 | Tgt Oil And Gas Services Fze | A Method of electromagnetic defectoscopy for multi-string wells and the electromagnetic downhole defectoscope |
| US20150219601A1 (en) * | 2012-08-31 | 2015-08-06 | Tgt Oil And Gas Services Fze | Method of electromagnetic defectoscopy for multi-string wells and the electromagnetic downhole defectoscope |
| US9772308B2 (en) * | 2012-08-31 | 2017-09-26 | Miks Llc | Method of electromagnetic defectoscopy for multi-string wells and the electromagnetic downhole defectoscope |
| CN104733863A (en) * | 2015-02-09 | 2015-06-24 | 中国石油天然气集团公司 | Cross-well electromagnetism logging instrument emitter and emitting antenna thereof |
| CN104733863B (en) * | 2015-02-09 | 2017-12-05 | 中国石油天然气集团公司 | Electromagnetic tool transmitter and its transmitting antenna between a kind of well |
| US10260854B2 (en) | 2016-12-07 | 2019-04-16 | Probe Technology Services, Inc. | Pulsed eddy current casing inspection tool |
| CN108760875A (en) * | 2018-05-18 | 2018-11-06 | 广东省特种设备检测研究院珠海检测院 | A kind of portable tape clad stress metal pipeline-weld positioning device and localization method |
| CN108872374A (en) * | 2018-09-19 | 2018-11-23 | 电子科技大学 | A kind of device based on electromagnetic eddy detection inner and outer walls of pipeline defective locations |
| CN110397434A (en) * | 2019-07-01 | 2019-11-01 | 大庆油田有限责任公司 | A kind of well bore situation imaging logging instrument and logging method |
| CN111749637A (en) * | 2020-06-19 | 2020-10-09 | 中国石油天然气股份有限公司 | Instrument and method for detecting lost fish head through electromagnetic scanning |
| CN112415088A (en) * | 2020-11-03 | 2021-02-26 | 南昌航空大学 | Inner-through transverse pulse eddy current detection probe and use method thereof |
| CN112415088B (en) * | 2020-11-03 | 2023-06-27 | 南昌航空大学 | Internal penetrating type transverse pulse eddy current detection probe and application method thereof |
| CN114216840A (en) * | 2022-01-12 | 2022-03-22 | 中国科学院武汉岩土力学研究所 | Distributed real-time monitoring system for casing corrosion |
| CN114216840B (en) * | 2022-01-12 | 2024-04-23 | 中国科学院武汉岩土力学研究所 | Distributed casing corrosion real-time monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201322740Y (en) | Eddy current case damage detecting device for improving circumferential defect detection rate | |
| CN103645243B (en) | Electromagnetic nondestructive detection system for power transmission line | |
| EP3167152B1 (en) | Deep azimuthal inspection of wellbore pipes | |
| US8756017B2 (en) | Method for detecting formation resistivity outside of metal casing using time-domain electromagnetic pulse in well | |
| US9803466B2 (en) | Imaging of wellbore pipes using deep azimuthal antennas | |
| CN103808794B (en) | The quick detection arrays probe of externally wearing type tubing string defect based on ACFM | |
| WO2012109844A1 (en) | Downhole time-domain pulsed electromagnetic method for detecting resistivity of stratum outside metal cased pipe | |
| CA3037075C (en) | Pulsed eddy current casing inspection tool | |
| JPH04233491A (en) | Electric conductivity measuring apparatus for boring hole | |
| RU2009130069A (en) | METHOD, SYSTEM, AND WELL DEVICE FOR EVALUATING LAYER PERMEABILITY | |
| CN109209363B (en) | Through-casing formation differential resistivity logging probe structure | |
| CN104165923A (en) | Nondestructive flaw detection device for metal wire/pipe | |
| US20160178579A1 (en) | Micro-focused imaging of wellbore pipe defects | |
| CN201382773Y (en) | Far field double transmitting array casing damage instrument sensor | |
| CN202382713U (en) | Electromagnetic ultrasonic sensor for measuring wall thickness of test piece | |
| CN105546359A (en) | Convenient online constant magnetic detection device for pressure-bearing industrial pipeline | |
| CN105781538A (en) | Coil system for electromagnetic wave propagation resistivity log | |
| CN110965983A (en) | Underground electromagnetic flaw detector | |
| RU2364719C1 (en) | Method of electromagnetic testing in multicolumn wells | |
| CN204188571U (en) | The transmitting terminal subsystem of PCCP steel wire fracture of wire detection | |
| CN204228662U (en) | PCCP steel wire yarn break inspect car | |
| CN107817292A (en) | The whole directive property Corkscrews Lamb wave transducer of double array adjustables of guided wave tomography | |
| RU2372478C1 (en) | Electromagnetic borehole defectoscope | |
| CN103775076A (en) | Magnetic susceptibility detecting device | |
| CN208334271U (en) | A kind of transient electromagnetic detection sensor and detection device |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20171212 |