CN106645385A - Petroleum string defect fast detecting probe based on Helmholtz coils - Google Patents
Petroleum string defect fast detecting probe based on Helmholtz coils Download PDFInfo
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- CN106645385A CN106645385A CN201610847210.3A CN201610847210A CN106645385A CN 106645385 A CN106645385 A CN 106645385A CN 201610847210 A CN201610847210 A CN 201610847210A CN 106645385 A CN106645385 A CN 106645385A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses a petroleum string defect fast detecting probe based on Helmholtz coils. The petroleum string defect fast detecting probe is characterized in that two circular coils with the interval being equal to the radius are utilized to sense a magnetic field and a current field which are orthogonally even on the surface of a petroleum string; when the orthogonal electromagnetic field passes a defect, the magnetic line in the petroleum string can generate a magnetic leakage effect at the section of the defect due to the magnetic conduction rate change at the defect, the surrounding current field is allowed bypass the defect due to the blocking of the defect to generate a disturbance effect to allow the magnetic field caused by sensing the current field to change, and the two effects jointly cause the distortion of the spatial magnetic field above the defect. The petroleum string defect fast detecting probe has the advantages that the spatial magnetic field change is extracted by a full-circumference array high-precision magnetic sensor so as to fast detect various defects such as corroded pits and cracks in the surface of the petroleum string, the various defects of the petroleum string can be detected, and the petroleum string defect fast detecting probe is significant to the prevention of petroleum string failure.
Description
Technical field
The present invention relates to a kind of petroleum pipe column flaw detection probe, more particularly to a kind of oil based on Hai Muhuoci coils
Tubing string defect quick detection is popped one's head in.
Background technology
The long-term work of the petroleum pipe column such as drilling rod, sucker rod, pipeline, standpipe bears many varying loads in complex environment, easily exists
Surface forms the defects such as crackle, etch pit, groove, finally causes tubing string to rupture and destroy, and causes serious production accident.Cause
This, oil drill rocker dispatch from the factory and under arms during carry out online Non-Destructive Testing with assessment, to prevent and treat drilling rod destruction, it is ensured that industry
Production safety has steadily carried out extremely important meaning.
Currently for column surface defects detection, wide variety of lossless detection method mainly has：Magnetic Flux Leakage Inspecting method, magnetic
Detection method and supersonic detection method.Magnetic Flux Leakage Inspecting method is a kind of very ripe oil field pipe online test method, and it is to pipeline
The defects such as etch pit, crackle have good Detection results, but leakage field effect and the direction of magnetization and defect openings of sizes, length-width ratio
It is closely related etc. factor, generally require to adopt different magnetizers for different direction of check and type in engineering with obtain compared with
High detection sensitivity, while need to carry out saturated magnetization and demagnetization to measurand during Magnetic Flux Leakage Inspecting method operation, not only to lacking
Sunken Size quantization produces impact, and reduces operating efficiency.Magnetic testing method has preferable Detection results to tubing string defect, is
Current effectively stress corrosion cracking marks detection method, but Magnetic testing technology is contact measurement method, is needed to pipe surface
Cleaning, the more detection time of detection operation is longer, testing cost is seriously increased, it is difficult to accomplish frequently to patrol and examine.Ultrasound detection
Method is equally to apply a kind of wider tubing string lossless detection method, but conventional Ultrasound method to need to be connect with measured workpiece when detecting
Touch, and add couplant between detection instrument and measurand, seriously limit its application scenario.
Axial crack can be had according to the externally wearing type alternating current field measurement of alternating current field measurement principle design probe
Compared with high sensitive, the all-round detection requirement to fast checking of column surface polymorphic type defect cannot be still met.
Natural flaw in industry spot is often arbitrary, and Jing often adopts various inspections for different defect types in production
Measurement equipment repeats or common scanning, not only results in missing inspection and serious production accident, will also seriously increase testing cost and work
The industry time.Therefore stone in being badly in need of a kind of sensitive to number of drawbacks, more reliable, more efficient testing equipment to ensure industrial production
The safe and reliable military service of tubing string.
The content of the invention
The purpose of the present invention is aiming at the deficiency of prior art presence, there is provided a kind of stone based on Hai Muhuoci coils
Tubing string defect quick detection is popped one's head in, and the circular coil for being equal to radius using two spacing goes out orthogonal in petroleum pipe column surface induction
Uniform magnetic field and current field, when crossed electric and magnetic field is through defect, because the change of fault location magnetic conductivity will cause petroleum pipe column
The middle magnetic line of force produces leakage field effect at defect section, while the blocking of defect will cause current field around to bypass defect generation again
Disturbance effect causes the magnetic field that induced electricity flow field causes to change, final two kinds of effects cause jointly space above defect what
Magnetic field is distorted.Space magnetic field change is extracted by the full circumferential array high accuracy Magnetic Sensor of circumferential array arrangement, is reached
Purpose to the quick detection of the polytype defects such as petroleum pipe column surface corrosion hole, crackle, lacks to petroleum pipe column polytype
Detection is fallen into, prevention petroleum pipe column failure is significant.
A kind of petroleum pipe column defect quick detection based on Hai Muhuoci coils is popped one's head in, and its technical scheme is：Phase will be passed through
It is wrapped in groove of the high molecular polymer skeleton two ends spacing equal to circular coil radius with the circular coil of alternating current, it is high
Molecularly Imprinted Polymer skeleton two ends are provided with chute, chute built with movable sensor bracket, the movable sensor bracket built with
Full circumferential array high accuracy Magnetic Sensor, the full circumferential array high accuracy Magnetic Sensor is fixed by fixing band.
Above-mentioned full circumferential array high accuracy Magnetic Sensor is equidistantly evenly spaced in tubing string circumferential direction.
Above-mentioned movable sensor bracket can be moved in chute.
The present invention has the advantage that compared with prior art as follows：A kind of oil based on Hai Muhuoci coils
Tubing string defect quick detection probe can go out orthogonal uniform current field and magnetic field in petroleum pipe column surface induction simultaneously, while utilizing
The leakage field effect and current disturbing effect that defect causes reaches the quick detection to number of drawbacks；Simultaneously because Hai Muhuoci is produced
Induced field be evenly distributed, therefore same electromagnetic field can be induced in different tube diameters column surface；Using radially may move
Array high-precision sensor, it is ensured that sensor and column surface have identical lift-off height, improve detection sensitivity
And efficiency,
Description of the drawings
Accompanying drawing 1 is the overall structure diagram of the present invention.
Accompanying drawing 2 is the high molecular polymer skeleton schematic diagram of the present invention.
Accompanying drawing 3 is the scheme of installation of the present invention.
Accompanying drawing 4 is the Cleaning Principle schematic diagram of the present invention.
Accompanying drawing 5 is the leakage field effect that uniform crossed electric and magnetic field causes around defect and current disturbing effect schematic diagram.
Accompanying drawing 6 is that axial crack, circumferential crack and the pit that the high-precision magnetic field sensor of the present invention is detected causes
Axially and radially field signal variation diagram.
In upper figure：Circular coil 1, high molecular polymer skeleton 2, groove 2.1, chute 2.2, full circumferential array high accuracy magnetic
Sensor 3, movable sensor bracket 4, fixing band 5, tubing string 6, uniform crossed electric and magnetic field 7, axial magnetic field 7.1, circumferential current field
7.2nd, defect 8, axial magnetic field signal 9, radial magnetic field signal 10.
Specific embodiment
With reference to accompanying drawing 1-6, the invention will be further described：
As shown in accompanying drawing 1,2, the present invention is mainly by circular coil 1, high molecular polymer skeleton 2, groove 2.1, chute
2.2nd, full circumferential array high accuracy Magnetic Sensor 3, movable sensor bracket 4, fixing band 5 are constituted.The high molecular polymer bone
Frame 2 is made up of groove 2.1, chute 2.2, and the uniform winding of the circular coil 1 is positioned at high molecular polymer skeleton two ends groove
In 2.1, apart from equal to the radius of circular coil 1, the full circumferential array high accuracy Magnetic Sensor 3 is equidistantly for the groove 2.1
Even to be arranged in the circumferential direction of tubing string 6 and be fixed in movable sensor bracket 4, the movable sensor bracket 4 is inserted in macromolecule
In polymer backbone chute 2.2, the movable sensor bracket 4 can be moved in chute, can keep full circumferential array high accuracy
Magnetic Sensor 3 has identical lift-off height with different tube diameters column surface, and the fixing band 5 is wrapped in high-precision magnetic field sensor
Outside 3, row constraint is entered to the radial displacement of full circumferential array high accuracy Magnetic Sensor 3.
As shown in Fig. 3,4,5,6, the circular coil 1, will be same on the surface of petroleum pipe column 6 when identical alternating current is passed through
When induce mutually orthogonal axial magnetic field 7.1 and circumferential current field 7.2 constitutes uniform crossed electric and magnetic field 7, the axial induction
Magnetic field 7.1 due at defect 8 magnetic conductivity change will cause the magnetic line of force in petroleum pipe column that leakage field effect is produced at defect section, together
Shi Zhouxiang induced electricities flow field 7.2 bypasses defect 8 and produces current disturbing effect so that the magnetic field that induced electricity flow field 7.2 causes becomes
Change, final two kinds of effects cause the top axial magnetic field signal 9 of defect 8 and the size of radial magnetic field signal 10 to change jointly, institute
State full circumferential array high-precision magnetic field sensor 3 pickup petroleum pipe column all-round to 360 degree axial magnetic field signals 9 and radial magnetic field letter
Numbers 10, can reach identification to defect 8 by analyzing field signal.
The invention has the beneficial effects as follows：It is the circular excitation coil of radius using two spacing, is formed in column surface
Axial magnetic field and circumferential current field that even just is handed over, when uniform crossed electric and magnetic field is through defect, because magnetic conductivity change will be in axle
To leakage field effect is caused, while defect will cause current disturbing effect around again, defect superjacent air space magnetic field is finally caused to occur
Change.The field signal of distortion can reflect flaw size and type, by full circumferential array high accuracy Magnetic Sensor extraction tube
Post surface is all-round to 360 degree of Magnetic Fields, reaches and the number of drawbacks such as column surface etch pit, crackle parameter is recognized and is quickly swept
Look into, while being designed using movable sensor bracket, it is ensured that full circumferential array high accuracy Magnetic Sensor has with different tube diameters tubing string
Identical lift-off height, improves the adaptability of probe, to preventing petroleum pipe column failure significant.
Claims (3)
1. a kind of petroleum pipe column defect quick detection based on Hai Muhuoci coils is popped one's head in, and its technical scheme is：To be passed through identical
The circular coil of alternating current is wrapped in high molecular polymer skeleton two ends spacing and is equal in the groove of circular coil radius, high score
Sub- polymer backbone two ends are provided with chute, and, built with movable sensor bracket, the movable sensor bracket is built with complete for chute
Circumferential array high accuracy Magnetic Sensor, the full circumferential array high accuracy Magnetic Sensor is fixed by fixing band.
2. above-mentioned full circumferential array high accuracy Magnetic Sensor is equidistantly evenly spaced in tubing string circumferential direction.
3. above-mentioned movable sensor bracket can be moved in chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847210.3A CN106645385A (en) | 2016-09-23 | 2016-09-23 | Petroleum string defect fast detecting probe based on Helmholtz coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847210.3A CN106645385A (en) | 2016-09-23 | 2016-09-23 | Petroleum string defect fast detecting probe based on Helmholtz coils |
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| Publication Number | Publication Date |
|---|---|
| CN106645385A true CN106645385A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610847210.3A Pending CN106645385A (en) | 2016-09-23 | 2016-09-23 | Petroleum string defect fast detecting probe based on Helmholtz coils |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426520A (en) * | 2018-05-15 | 2018-08-21 | 天津大学 | The detection device in pipeline stolen hole and the detection method at stolen hole center, diameter |
| CN109342549A (en) * | 2018-11-28 | 2019-02-15 | 中国石油大学(华东) | A kind of aluminium alloy pipeline inside and outside wall flaw detection probe |
| CN111336410A (en) * | 2020-04-20 | 2020-06-26 | 西南石油大学 | Real-time online detection device and method for erosion of magnetic conduction pipe column |
| CN111398409A (en) * | 2020-01-09 | 2020-07-10 | 中国海洋石油集团有限公司 | Underwater conductive metal material crack section reconstruction method based on alternating current electromagnetic field |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426520A (en) * | 2018-05-15 | 2018-08-21 | 天津大学 | The detection device in pipeline stolen hole and the detection method at stolen hole center, diameter |
| CN109342549A (en) * | 2018-11-28 | 2019-02-15 | 中国石油大学(华东) | A kind of aluminium alloy pipeline inside and outside wall flaw detection probe |
| CN111398409A (en) * | 2020-01-09 | 2020-07-10 | 中国海洋石油集团有限公司 | Underwater conductive metal material crack section reconstruction method based on alternating current electromagnetic field |
| CN111398409B (en) * | 2020-01-09 | 2023-04-21 | 中国海洋石油集团有限公司 | Underwater conductive metal material crack profile reconstruction method based on alternating current electromagnetic field |
| CN111336410A (en) * | 2020-04-20 | 2020-06-26 | 西南石油大学 | Real-time online detection device and method for erosion of magnetic conduction pipe column |
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