CN111287733A - Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth - Google Patents
Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth Download PDFInfo
- Publication number
- CN111287733A CN111287733A CN201910963726.8A CN201910963726A CN111287733A CN 111287733 A CN111287733 A CN 111287733A CN 201910963726 A CN201910963726 A CN 201910963726A CN 111287733 A CN111287733 A CN 111287733A
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- defects
- rotating magnetic
- signal
- sucker rod
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 230000007547 defect Effects 0.000 claims abstract description 46
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000003672 processing method Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 9
- 239000000523 sample Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 230000005284 excitation Effects 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a method for detecting an externally-penetrated rotating magnetic field wellhead sucker rod, which comprises the following steps: the uniform rotating magnetic field generated by the exciting coil induces an annular eddy current on the surface of the sample, and defects at any angle on the sample can generate disturbance on the annular eddy current; the detection coil picks up all axial disturbance signals generated by the defects; the voltage signal generated by the detection coil is amplified by a voltage amplifier and then is connected to a phase-locked amplifier for processing, and the real part voltage signal and the imaginary part voltage signal of the defect signal are output; and (3) displaying the change curve on a front panel in real time by using a LabVIEW program by a collected computer: and drawing an impedance plane graph on MATLAB by using the data of the real part and the imaginary part, and judging the specific circumferential position of the defect according to the angle of the image. The rotating magnetic field generated by the invention is more uniform and sensitive to defects in all directions, all axial disturbance signals generated by the defects can be picked up, the lifting-off influence is avoided, the rotating magnetic field is suitable for sucker rods with different outer diameters, and the accurate positions of the defects can be determined by a subsequent data processing method.
Description
Technical Field
The invention belongs to the field of eddy current nondestructive testing, relates to a wellhead detection method, and particularly relates to an externally-penetrated rotating magnetic field wellhead sucker rod detection method.
Background
In the petroleum industry, various oil extraction modes exist at present, wherein mechanical oil extraction is the most important, particularly a sucker-rod pump, and the sucker-rod oil pumping technology plays an important role in the petroleum extraction in China. Sucker rods are therefore important tools in the operation of oil wells. The existing sucker rod has a part of the existing sucker rod working for more than five years, and because of severe working conditions and long-term continuous repetitive service, the sucker rod is easy to generate fatigue cracks under the action of long-term load such as alternation, vibration, impact and the like in the using process. And because the detection technology, equipment condition and maintenance measures during ground maintenance are limited, the sucker rod with serious defects continues to work in the well, so that the sucker rod is broken. Therefore, the quantitative nondestructive detection and evaluation of the sucker rod have very important significance for reducing the accidents of rod breakage and rod falling of the sucker rod and reducing the oil extraction cost.
One type of inspection method that detects material and component implementation defects and tests their performance based on changes in the electromagnetic properties of the material is known as electromagnetic inspection. The basic principle is the theory of electromagnetism. The electromagnetic detection comprises eddy current detection, magnetic flux leakage detection, magnetic powder detection, microwave detection and the like.
Eddy current inspection is the most common way of electromagnetic inspection. After the eddy current testing technology is researched from the sixties of the last century in China, various novel eddy current testing methods are successively provided, including an eddy current impedance analysis method, a single-frequency eddy current testing technology, a multi-frequency eddy current testing technology, a pulse eddy current testing technology, a far-field eddy current testing technology and the like. The main principle is that when a coil carrying alternating current is close to a conductor, an alternating magnetic field generated by the alternating current induces eddy currents on the surface of the conductor. Through the optimization design of the coil, when the surface of the conductor is free of defects, the generated eddy current is uniform, when the surface of the conductor is in defects, the eddy current is distorted by the defects, the magnetic field caused by the eddy current is changed, the original alternating magnetic field is further influenced, and the defects on the surface of the conductor can be detected by directly or indirectly measuring the change of the magnetic field.
In the current sucker rod well head detection technique, the influence that the detected signal of eddy current testing technique was lifted away from the effect is great, and ordinary eddy current testing probe requires very high to scanning machine control to general inefficiency, detection effect is poor, has very high requirement to operating personnel. Most importantly, most of the existing wellhead detection technologies are magnetic flux leakage detection technologies, only the defect perpendicular to the vortex direction can be detected, axial positioning can be carried out on the defect, the circumferential position of the defect cannot be detected, and the joint of the sucker rod cannot be detected. Therefore, it is necessary to provide an external-through type rotating magnetic field wellhead sucker rod detection method which can solve the above problems, and compared with the traditional external-through type eddy current detection coil, the rotating magnetic field generates an annular eddy current on the surface of the sucker rod, so that the detection method is sensitive to defects in all directions, is not influenced by lift-off, is suitable for sucker rods with different outer diameters, can detect when a sucker rod joint is encountered, realizes continuous and rapid scanning, and can determine the accurate circumferential position of the defect through a subsequent data processing method.
Disclosure of Invention
The invention aims to solve the problems, provides an external-penetrating rotating magnetic field sucker rod wellhead detection system which can be used for an external-penetrating rotating magnetic field detection method of a wellhead sucker rod, an excitation coil can generate a more uniform rotating magnetic field and is sensitive to defects in all directions, a signal detection coil can pick up all axial disturbance signals generated by the defects, the signal detection coil is not influenced by lifting, the signal detection coil is suitable for sucker rods with different outer diameters, and the accurate positions of the defects can be determined through a subsequent data processing method.
The detection system comprises a three-phase signal generator, an excitation coil, a signal detection coil and a detection data acquisition and processing link, wherein the three-phase signal is connected to the excitation coil which is uniformly placed at a certain angle to generate a rotating magnetic field, the signal detection coil is uniformly wound on a coil fixing device and integrally fixed in the center of the excitation coil, the signal detection coil is connected to a voltage amplifier through a BNC (bayonet nut connector), the voltage amplifier is connected with a lock-in amplifier, the lock-in amplifier is connected to an acquisition card and finally connected with a computer.
The exciting coil comprises 24 coils with a phase difference of 15 degrees and is uniformly wound on the iron core, the exciting coil is connected with an external three-phase signal generator through a junction box, the base is positioned at the bottom of the shell, and the upper part of the base is sealed by a top end cover.
The signal detection coil is provided with 120 turns of outer wall circumferential grooves wound in the middle of the coil fixing device, and two ends of the coil are connected with the wiring terminal along the longitudinal grooves of the coil fixing device.
The provided detection method for the wellhead of the externally-penetrated rotating magnetic field sucker rod comprises the following steps:
the method comprises the following steps: the uniform rotating magnetic field generated by the exciting coil induces annular eddy currents on the surface of the sample, and defects at any angle on the sample can generate disturbance on the annular eddy currents, so that the surrounding magnetic field is changed.
Step two: the signal detection coil can pick up all axial disturbance signals generated by defects to generate a voltage signal.
Step three: the voltage signal generated by the detection coil is amplified by the voltage amplifier and then is connected to the phase-locked amplifier for processing, and then the real part voltage signal and the imaginary part voltage signal of the defect signal are output.
Step four: and collecting real part voltage signals and imaginary part voltage signals of the defects into a computer by using a collecting card, storing the signal data into the computer by using a LabVIEW program, and displaying the change curve on a front panel in real time.
Step five: and importing the stored real part data and imaginary part data into MATLAB to draw an impedance plane graph, and judging the specific circumferential position of the defect according to the angle of the impedance plane graph.
The invention has the beneficial effects that:
(1) the exciting coil can generate a more uniform four-pair-pole rotating magnetic field;
(2) compared with the traditional outward-penetrating eddy current detection coil, the rotating magnetic field generates annular eddy current on the surface of the sucker rod, so that the detection coil is sensitive to defects in all directions;
(3) the detection coil of the external penetrating type rotating magnetic field can pick up all axial disturbance signals generated by defects, is not influenced by lifting, is suitable for sucker rods with different outer diameters, and can detect the joint of the sucker rod to realize continuous and rapid scanning;
(4) by means of a subsequent data processing method, the exact circumferential position of the defect can be determined.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention and a wiring diagram;
FIG. 2 is a cross-sectional view of the overall structure of the present invention;
FIG. 3 is an external view of the overall structure of the present invention;
FIG. 4 is a schematic diagram of the winding of the exciting coil of the present invention;
FIG. 5 is a graph of real part detection signals of three cracks on a sample according to an embodiment of the present invention;
FIG. 6 is a graph of imaginary detection signals for three cracks in a sample provided by an embodiment of the present invention;
FIG. 7 is a graph of a defect at 0 provided by an embodiment of the present invention;
fig. 8 is a plan view of the impedance of a defect provided by an embodiment of the present invention at 90 °.
Fig. 9 is a plan view of the impedance of a defect provided by an embodiment of the present invention at 180 °.
Fig. 10 is a plan view of the impedance of a defect at 270 deg. provided by an embodiment of the present invention.
In the upper diagram: the device comprises a top end cover 1, a shell 2, an iron core 3, an exciting coil 4, a coil fixing device 5, a sucker rod 6, a wiring terminal 7, a wiring terminal output end 7.1, a wiring terminal input end 7.2, a signal detection coil 8, a wiring box 9, a base 10, a voltage amplifier 11, a lock-in amplifier 12, a collection card 13, a computer 14, a signal generator 15 and a signal collection and processing link 16.
Detailed Description
The invention will be further described with reference to the accompanying figures 1-8.
As shown in figure 1, the external-through rotating magnetic field wellhead sucker rod detection system comprises a three-phase signal generator 15, an excitation coil 4, a signal detection coil 8 and a detection data acquisition and processing link 16, wherein the three-phase signal generator 15 is connected to the excitation coil 4 which is uniformly arranged at a certain angle to generate a rotating magnetic field, the signal detection coil 8 is uniformly wound on a coil fixing device 5 and is integrally fixed at the center of the excitation coil 4, the signal detection coil 8 is connected to a voltage amplifier 11 through BNC, the voltage amplifier 11 is connected with a phase-locked amplifier 12, the phase-locked amplifier 12 is connected to a collection card 13, and finally the phase-locked amplifier 12 is connected with a computer 14.
The exciting coil 4 comprises 24 coils with 15-degree phase difference and is uniformly wound on the iron core 3, the exciting coil 4 is connected with an external three-phase signal generator 15 through a junction box 9, a base 10 is positioned at the bottom of the shell 2, and the upper part of the base is sealed by a top end cover 1.
The signal detection coil 8 is provided with 120 turns of circumferential grooves wound on the outer wall in the middle of the coil fixing device 5, and two ends of the signal detection coil 8 are connected with the input end 7.2 of the wiring terminal along the longitudinal grooves of the coil fixing device 5.
The provided detection method for the wellhead of the externally-penetrated rotating magnetic field sucker rod comprises the following steps:
the method comprises the following steps: the signal generator 15 is used for respectively connecting sinusoidal voltage signals with the phases of 0 degrees, 120 degrees and 240 degrees to the exciting coil 4 through the junction box 9 through a BNC transfer line, the exciting coil 4 adopts 24 coils, a winding principle diagram is shown in figure 4, a rotating magnetic field with four pairs of poles is generated, the number of pole pairs is higher, the magnetic field on the surface of the sucker rod 6 is more uniform, and compared with the traditional outward-penetrating type eddy current detection coil, the rotating magnetic field generates annular eddy currents on the surface of a sample, so that the detecting coil is sensitive to defects in all directions.
Step two: the signal detection coil 8 is formed by uniformly winding 120 turns of copper paint wires and is used for picking up disturbance signals generated by surface defects of the sucker rod 6, and the detection coil 8 can pick up all axial disturbance signals generated by the defects because the system is of an external penetrating type, and the detection signals are not influenced by the lifting height, so that the system is suitable for sucker rods 6 with different outer diameters.
Step three: the output end of the phase-locked loop is connected with the input end 7.2 of the wiring terminal, the output end 7.1 of the wiring terminal is connected with the voltage amplifier 11, and the real part and the imaginary part of the signal are respectively output after being processed by the phase-locked amplifier 12.
Step four: the two signals are connected to the acquisition card 13 and acquired to the computer 14, and the signals are processed by a LabVIEW program at the computer end and then displayed on a screen in real time, as shown in FIGS. 5 and 6. The sample is placed inside the inspection system and defects can be detected even if the sample is not centered.
Step five: three cracks were present in the specimen and therefore the detection signal had three peaks, and we intercepted the information of the median defect and directed the real and imaginary parts into MATLAB to plot an impedance plane as shown in fig. 7. Then, the sucker rod is rotated by 90 degrees each time, the detection result graph similar to the graph in fig. 5 and 6 is obtained again, the information of the middle defect is intercepted, and the real part and the imaginary part are led into MATLAB to draw an impedance plane graph, as shown in fig. 8, 9 and 10. The angles of the four graphs are respectively different by 90 degrees and are matched with the rotation angle difference of the sample defect, so that the accurate circumferential position of the defect can be judged by a subsequent data processing method.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and various changes may be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (1)
1. A wellhead detection method for an externally-penetrated rotating magnetic field sucker rod comprises the following steps:
the method comprises the following steps: the uniform rotating magnetic field generated by the exciting coil induces annular eddy currents on the surface of the sample, and defects at any angle on the sample can generate disturbance on the annular eddy currents, so that the surrounding magnetic field is changed.
Step two: the signal detection coil can pick up all axial disturbance signals generated by defects to generate a voltage signal.
Step three: the voltage signal generated by the detection coil is amplified by the voltage amplifier and then is connected to the phase-locked amplifier for processing, and then the real part voltage signal and the imaginary part voltage signal of the defect signal are output.
Step four: and collecting real part voltage signals and imaginary part voltage signals of the defects into a computer by using a collecting card, storing the signal data into the computer by using a LabVIEW program, and displaying the change curve on a front panel in real time.
Step five: and importing the stored real part data and imaginary part data into MATLAB to draw an impedance plane graph, and judging the specific circumferential position of the defect according to the angle of the impedance plane graph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910963726.8A CN111287733A (en) | 2019-10-11 | 2019-10-11 | Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910963726.8A CN111287733A (en) | 2019-10-11 | 2019-10-11 | Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111287733A true CN111287733A (en) | 2020-06-16 |
Family
ID=71020237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910963726.8A Pending CN111287733A (en) | 2019-10-11 | 2019-10-11 | Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111287733A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858467A (en) * | 2021-04-09 | 2021-05-28 | 中国石油大学(华东) | Rotating electromagnetic field pipeline crack detection probe and detection system in any direction |
| CN113049675A (en) * | 2021-04-09 | 2021-06-29 | 中国石油大学(华东) | Rotating electromagnetic field pipeline defect layered detection probe and method |
| CN117110422A (en) * | 2023-10-23 | 2023-11-24 | 国机传感科技有限公司 | Array far-field eddy current data analysis method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09127063A (en) * | 1995-11-06 | 1997-05-16 | Nippon Steel Corp | Detector for flaw of conductor |
| CN101231268A (en) * | 2008-01-31 | 2008-07-30 | 华南理工大学 | Polyphase eddy detecting device and method |
| CN201935897U (en) * | 2010-12-29 | 2011-08-17 | 华南理工大学 | Multi-phase multi-pole eddy current probe |
| CN103760233A (en) * | 2014-01-27 | 2014-04-30 | 爱德森（厦门）电子有限公司 | shielding device for through eddy current sensor |
| CN103995052A (en) * | 2014-05-22 | 2014-08-20 | 西安交通大学 | Small diameter tube structure electromagnetic ultrasonic non-destructive detection method based on rotating magnetic field |
| CN204287111U (en) * | 2014-11-11 | 2015-04-22 | 中国电器科学研究院有限公司 | A kind of externally wearing type three-phase vortex detection probe |
-
2019
- 2019-10-11 CN CN201910963726.8A patent/CN111287733A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09127063A (en) * | 1995-11-06 | 1997-05-16 | Nippon Steel Corp | Detector for flaw of conductor |
| CN101231268A (en) * | 2008-01-31 | 2008-07-30 | 华南理工大学 | Polyphase eddy detecting device and method |
| CN201935897U (en) * | 2010-12-29 | 2011-08-17 | 华南理工大学 | Multi-phase multi-pole eddy current probe |
| CN103760233A (en) * | 2014-01-27 | 2014-04-30 | 爱德森（厦门）电子有限公司 | shielding device for through eddy current sensor |
| CN103995052A (en) * | 2014-05-22 | 2014-08-20 | 西安交通大学 | Small diameter tube structure electromagnetic ultrasonic non-destructive detection method based on rotating magnetic field |
| CN204287111U (en) * | 2014-11-11 | 2015-04-22 | 中国电器科学研究院有限公司 | A kind of externally wearing type three-phase vortex detection probe |
Non-Patent Citations (1)
| Title |
|---|
| 安宝详: "《汽车制造无损检测应用技术》", 30 September 1998, 北京理工大学出版社, pages: 284 - 287 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858467A (en) * | 2021-04-09 | 2021-05-28 | 中国石油大学(华东) | Rotating electromagnetic field pipeline crack detection probe and detection system in any direction |
| CN113049675A (en) * | 2021-04-09 | 2021-06-29 | 中国石油大学(华东) | Rotating electromagnetic field pipeline defect layered detection probe and method |
| CN113049675B (en) * | 2021-04-09 | 2022-07-29 | 中国石油大学(华东) | Rotating electromagnetic field pipeline defect layered detection probe and method |
| CN117110422A (en) * | 2023-10-23 | 2023-11-24 | 国机传感科技有限公司 | Array far-field eddy current data analysis method and system |
| CN117110422B (en) * | 2023-10-23 | 2024-01-30 | 国机传感科技有限公司 | Array far-field eddy current data analysis method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111287733A (en) | Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth | |
| CN111289609A (en) | External-penetrating type rotating magnetic field wellhead sucker rod detection system | |
| CN103645243B (en) | Electromagnetic nondestructive detection system for power transmission line | |
| JP2535322B2 (en) | Tubular string defect detection apparatus and method | |
| CN103487503B (en) | A kind of rotating magnetic field eddy current probe | |
| US20070222438A1 (en) | Electromagnetic flaw detection apparatus for inspection of a tubular | |
| CN103235036B (en) | Based on pick-up unit and the method for the differentiation inside and outside wall defect of electromagnetic detection signal | |
| CN109781838B (en) | Vortex-ultrasonic detection probe based on V-shaped coil excitation | |
| CN109115869B (en) | S-shaped array eddy current probe for detecting wire breakage defect of steel wire rope and detection method | |
| CN203949898U (en) | A kind of double-U-shaped array detection probe based on ac magnetic field | |
| CN106153713A (en) | A kind of metallic conduit defect in inner surface detection device | |
| CN109060938A (en) | Wirerope magnetic flux defects detection sensor | |
| CN103196996A (en) | Eddy current detecting device used for performing metal defect detection and eddy current probe thereof | |
| CN114113307A (en) | Omnidirectional defect detection device and method for coiled tubing | |
| CN113109432A (en) | Pulse eddy current detection device for lead sealing part of cable connector and application method thereof | |
| CN114088808B (en) | Pipeline crack visual detection method and system for three-dimensional induced eddy magnetic field cloud picture | |
| CN112415088B (en) | Internal penetrating type transverse pulse eddy current detection probe and application method thereof | |
| CN210376233U (en) | Orthogonal rotation eddy current detection system | |
| CN111458400A (en) | Metal material defect detection system based on electromagnetic induction | |
| CN209102667U (en) | A kind of portable pipe detection device based on far-field eddy | |
| CN214895021U (en) | Cable joint lead sealing position pulse eddy current detection device | |
| CN210834768U (en) | Eddy current flaw detection device based on orthogonal detection | |
| CN104764800B (en) | One kind is based on the series connection magnetized piston ring remanent magnetism method of detection of closed type and device | |
| CN113376248A (en) | Flexible electromagnetic eddy current sensor, drill rod nondestructive testing system and method | |
| CN102495131B (en) | Device and method for detecting magnetic flux leakage of wellhead of drilling tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200616 |