CN113866274A - Ultrasonic detection method for filling defects of steel epoxy sleeve for oil and gas long-distance pipeline - Google Patents
Ultrasonic detection method for filling defects of steel epoxy sleeve for oil and gas long-distance pipeline Download PDFInfo
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- CN113866274A CN113866274A CN202111273995.5A CN202111273995A CN113866274A CN 113866274 A CN113866274 A CN 113866274A CN 202111273995 A CN202111273995 A CN 202111273995A CN 113866274 A CN113866274 A CN 113866274A
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- 230000007547 defect Effects 0.000 title claims abstract description 76
- 239000004593 Epoxy Substances 0.000 title claims abstract description 71
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 230000000694 effects Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 239000002313 adhesive film Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 239000000945 filler Substances 0.000 description 4
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/048—Marking the faulty objects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/262—Arrangements for orientation or scanning by relative movement of the head and the sensor by electronic orientation or focusing, e.g. with phased arrays
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an ultrasonic detection method for filling defects of a steel epoxy sleeve for an oil and gas long-distance pipeline, which relates to the technical field of pipe network operation assembly detection and aims to solve the problem that the repair effect of the sleeve is influenced due to the defect of insufficient epoxy filling in the field construction process of the steel epoxy sleeve, and the technical scheme is characterized by comprising the following steps of: selecting a tool, selecting a negative square wave excited phased array ultrasonic detector, and selecting a phased array transducer; and (3) positioning and quantifying the defects, detecting by adopting a longitudinal wave direct incidence adhesive film, filling the defects, manufacturing a steel epoxy sleeve according to the size of an image marking area, filling a defect ultrasonic contrast test block, detecting the result, and putting the ultrasonic contrast test block which is detected normally into the defect position to ensure the normal use of the whole body. The effects of quick and accurate quantitative positioning of defects, high accuracy and convenient detection are achieved.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to an ultrasonic testing method for filling defects of a steel epoxy sleeve for an oil and gas long-distance pipeline.
Background
The steel epoxy sleeve is a non-stop and non-welding pipeline repairing mode, has the advantages of convenience in operation, non-stop conveying, no fire and the like, is one of the main means for repairing the defective pipeline in the field of oil and gas long-distance conveying, and can be widely applied to the defect repairing of the petroleum and natural gas pipeline due to the fact that the steel epoxy sleeve reinforcing and repairing technology can effectively share the stress of the defective part.
At present, the steel epoxy sleeve repairing technology is a mode of utilizing two semicircular assemblies made of steel plates to cover the outside of a pipe body defect and keep a certain annular gap with a pipeline, sealing two ends of the annular gap by special glue, and then filling epoxy filler into the sealed space to form a composite sleeve to reinforce and repair the pipeline defect, wherein the repairing quality of the steel epoxy sleeve is crucial to the safety of the repaired defect, and the repairing effect of the steel epoxy sleeve is obviously influenced by the epoxy filler in the middle layer and the interface bonding effect.
The above prior art solutions have the following drawbacks: the construction quality of the epoxy intermediate layer has great relation with the performance of the epoxy filler, the surface treatment and the annular gap between the sleeve and the pipeline. In the field construction process, due to the influences of factors such as uneven thickness of a circular gap between the sleeve and the pipeline, curing shrinkage of the epoxy filler and the like, the defect of insufficient epoxy filling of the steel epoxy sleeve in the field construction process is easily caused, and the sleeve repairing effect is influenced.
Disclosure of Invention
The invention aims to provide an ultrasonic detection method for filling defects of a steel epoxy sleeve for an oil and gas long-distance pipeline, which greatly improves the scanning, positioning and quantifying of the defects of the existing epoxy sleeve.
In order to achieve the purpose, the invention provides the following technical scheme:
an ultrasonic detection method for filling defects of a steel epoxy sleeve for an oil and gas long-distance pipeline comprises the following steps:
s1: selecting a tool, namely selecting a negative square wave excited phased array ultrasonic detector, wherein the emission output waveform of the phased array ultrasonic detector is a negative square wave, selecting a phased array transducer, and the wafer frequency of the ultrasonic transducer is 5 MHz;
s2: positioning and quantifying defects, detecting by adopting a longitudinal wave direct incidence film, selecting line scanning in a scanning mode, wherein the scanning angle is 0 degrees, and coding C scanning is carried out by using the echo height of multiple waves during detection, wherein an epoxy resin-free area in a C scanning image is red, an epoxy resin area is light blue or white, and the size of the image marking area is determined;
s3: filling the defect, namely manufacturing a steel epoxy sleeve filled defect ultrasonic comparison test block according to the size of the image marking area, wherein the steel epoxy sleeve filled defect ultrasonic comparison test block is made of a material with the same acoustic performance and the same structure as the detected workpiece, and putting the manufactured comparison test block into the defect;
s4: the detection achievement will detect the supersound contrast test block after normally and put into defect department, guarantees whole normal use to detect the sleeve that can normally use, make the second contrast test block simultaneously and detect, make things convenient for wholly to change after damaging, thereby guarantee whole good adaptation effect.
Through adopting above-mentioned technical scheme, use negative square wave excitation's phased array ultrasonic detector to establish not to the defect in the steel epoxy sleeve to guarantee that whole convenience fills out the preparation of piece according to the defect size of discernment, guarantee the use that can be normal after the integral erection.
Further, the emission voltage of the phased array ultrasonic detector in the step S1 is 100V, the pulse emission width of the phased array ultrasonic detector is adjustable from 30ns to 1000ns, and the minimum adjustment step is 5 ns.
Through adopting above-mentioned technical scheme, inject phased array ultrasonic detector's data to guarantee that phased array ultrasonic detector can carry out abundant detection to defect department, make things convenient for whole preparation according to the size of defect to carry out the contrast piece.
Furthermore, the gain adjusting range of the receiving circuit of the phased array ultrasonic detector is 110dB, and the minimum adjusting step is 0.1 dB.
Through adopting above-mentioned technical scheme, phased array ultrasonic detector's circuit regulation numerical value is less, makes things convenient for wholly to carry out abundant scanning to comparatively slight defect department, guarantees whole good scanning location effect, has increased whole scanning location effect.
Further, the wafer size of the ultrasonic guided wave transducer in S1 is 0.6mm, the aperture size is phi 8mm, and the probe is 128 array elements.
By adopting the technical scheme, the whole body is detected by the wafer using the ultrasonic guided wave transducer, and the whole good detection and positioning effect is ensured, so that the whole good positioning and scanning effect is ensured, and the whole filling effect is increased.
Further, the size of the ultrasonic reference block with defects filled in the steel epoxy sleeve in the step S3 is 300mm multiplied by 300mm, the upper layer is a 10mm steel arc plate, the middle layer is 15mm epoxy, and the lower layer is a 10mm steel arc plate.
Through adopting above-mentioned technical scheme, defect supersound reference block is filled to steel epoxy sleeve can be based on the defect size that has reachd and make to guarantee that whole preparation can carry out abundant block with defect department after, can normally use after guaranteeing the integral erection.
Furthermore, flat-bottom holes with the diameter of 25mm, the diameter of 20mm, the diameter of 15mm, the diameter of 10mm, the diameter of 8mm and the diameter of 5mm are respectively processed on the steel epoxy sleeve filling defect ultrasonic comparison test block and are all processed to an upper steel-epoxy interface to simulate the steel epoxy sleeve filling defect.
Through adopting above-mentioned technical scheme, the steel epoxy sleeve that the defect preparation was filled to simulation steel epoxy sleeve fills defect supersound reference block and has seted up flat bed hole, makes things convenient for whole installation to use, guarantees whole good repair effect.
Further, in the step S4, the specification of the second reference block is consistent with that of the steel epoxy sleeve defect-filled ultrasonic reference block, and the manufacturing method of the second reference block is the same as that of the steel epoxy sleeve defect-filled ultrasonic reference block.
Through adopting above-mentioned technical scheme, preparation second contrast test block prevents that steel epoxy sleeve from filling defect supersound contrast test block from producing the damage in the in-process that uses and need redoing, makes things convenient for wholly to fill defect supersound contrast test block and change the steel epoxy sleeve that damages.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the method adopts ultrasonic phased array equipment to perform circular linear detection on the outer wall of the sleeve, thereby realizing the detection of the filling defect of the steel epoxy sleeve for the oil and gas long-distance pipeline, accurately quantifying and positioning the defect and realizing the effect of quickly and accurately quantifying and positioning the defect;
2. the position and the size of the defect in the C-type display of the phased array ultrasonic detector are evaluated by adopting the reflected signal, compared with the traditional knocking method, the detection precision and the detection reliability of the invention are higher, and the effect of high precision is realized;
3. the phased array ultrasonic detector is adopted to transmit and receive ultrasonic waves into the steel epoxy sleeve to be detected, the handheld detection device is used for assisting the transducer to detect the steel epoxy sleeve detection surface, echo signals made by the steel epoxy sleeve ultrasonic reference block are used for positioning and quantifying the defects in the steel epoxy sleeve, and the effect of convenient detection is generated.
Drawings
FIG. 1 is a schematic view of the working process of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an ultrasonic detection method for filling defects of a steel epoxy sleeve for an oil and gas long-distance pipeline comprises the following steps:
s1: selecting a tool, selecting a negative square wave excited phased array ultrasonic detector, wherein the emission output waveform of the phased array ultrasonic detector is a negative square wave, selecting a phased array transducer, the wafer frequency of the ultrasonic guided wave transducer is 5MHz, the emission voltage of the phased array ultrasonic detector is 100V, the pulse emission width of the phased array ultrasonic detector is 30 ns-1000 ns adjustable, the minimum adjustment step is 5ns, the gain adjustment range of a receiving circuit of the phased array ultrasonic detector is 110dB, the minimum adjustment step is 0.1dB, the wafer size of the ultrasonic guided wave transducer is 0.6mm, the aperture size is phi 8mm, and a probe is 128 array elements;
s2: positioning and quantifying defects, detecting by adopting a longitudinal wave direct incidence film, selecting line scanning in a scanning mode, wherein the scanning angle is 0 degrees, and coding C scanning is carried out by using the echo height of multiple waves during detection, wherein an epoxy resin-free area in a C scanning image is red, an epoxy resin area is light blue or white, and the size of the image marking area is determined;
s3: filling the defects, namely manufacturing a steel epoxy sleeve defect filling ultrasonic comparison test block according to the size of an image marking area, wherein the steel epoxy sleeve defect filling ultrasonic comparison test block is made of materials with the same acoustic performance and the same structure as the detected workpiece, the manufactured comparison test block is placed in the defect, the steel epoxy sleeve defect filling ultrasonic comparison test block is 300mm multiplied by 300mm in size, a steel arc plate with 10mm at the upper layer, epoxy with 15mm at the middle layer and a steel arc plate with 10mm at the lower layer are respectively processed on the steel epoxy sleeve defect filling ultrasonic comparison test block, flat bottom holes with phi 25mm, phi 20mm, phi 15mm, phi 10mm, phi 8mm and phi 5mm are all processed on an upper layer steel-epoxy interface to simulate the steel epoxy sleeve defect filling;
s4: the detection achievement, the defect department is put into to the supersound contrast test block after will detecting normally, guarantees whole normal use, and detect the sleeve that can normally use, the preparation second contrast test block detects simultaneously, the second contrast test block is unanimous with steel epoxy sleeve packing defect supersound contrast test block specification, the second contrast test block is the same with steel epoxy sleeve packing defect supersound contrast test block preparation method, make things convenient for wholly to change after damaging, thereby guarantee whole good adaptation effect.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. An ultrasonic detection method for filling defects of a steel epoxy sleeve for an oil and gas long-distance pipeline is characterized by comprising the following steps: the method comprises the following steps:
s1: selecting a tool, namely selecting a negative square wave excited phased array ultrasonic detector, wherein the emission output waveform of the phased array ultrasonic detector is a negative square wave, selecting a phased array transducer, and the wafer frequency of the ultrasonic transducer is 5 MHz;
s2: positioning and quantifying defects, detecting by adopting a longitudinal wave direct incidence film, selecting line scanning in a scanning mode, wherein the scanning angle is 0 degrees, and coding C scanning is carried out by using the echo height of multiple waves during detection, wherein an epoxy resin-free area in a C scanning image is red, an epoxy resin area is light blue or white, and the size of the image marking area is determined;
s3: filling the defect, namely manufacturing a steel epoxy sleeve filled defect ultrasonic comparison test block according to the size of the image marking area, wherein the steel epoxy sleeve filled defect ultrasonic comparison test block is made of a material with the same acoustic performance and the same structure as the detected workpiece, and putting the manufactured comparison test block into the defect;
s4: the detection achievement will detect the supersound contrast test block after normally and put into defect department, guarantees whole normal use to detect the sleeve that can normally use, make the second contrast test block simultaneously and detect, make things convenient for wholly to change after damaging, thereby guarantee whole good adaptation effect.
2. The ultrasonic detection method for the filling defect of the steel epoxy sleeve for the oil and gas long-distance pipeline according to claim 1, which is characterized by comprising the following steps of: the transmitting voltage of the phased array ultrasonic detector in the S1 is 100V, the pulse transmitting width of the phased array ultrasonic detector is 30ns to 1000ns adjustable, and the minimum adjusting step is 5 ns.
3. The ultrasonic detection method for the filling defect of the steel epoxy sleeve for the oil and gas long-distance pipeline according to claim 2, which is characterized by comprising the following steps: the gain adjustment range of the receiving circuit of the phased array ultrasonic detector is 110dB, and the minimum adjustment step is 0.1 dB.
4. The ultrasonic detection method for the filling defect of the steel epoxy sleeve for the oil and gas long-distance pipeline according to claim 1, which is characterized by comprising the following steps of: the wafer size of the ultrasonic guided wave transducer in the S1 is 0.6mm, the aperture size is phi 8mm, and the probe is 128 array elements.
5. The ultrasonic detection method for the filling defect of the steel epoxy sleeve for the oil and gas long-distance pipeline according to claim 1, which is characterized by comprising the following steps of: the size of the defect ultrasonic reference block filled by the steel epoxy sleeve in the S3 is 300mm multiplied by 300mm, the upper layer is a 10mm steel arc plate, the middle layer is 15mm epoxy, and the lower layer is a 10mm steel arc plate.
6. The ultrasonic detection method for the filling defect of the steel epoxy sleeve for the oil and gas long-distance pipeline according to claim 5, wherein the ultrasonic detection method comprises the following steps: flat bottom holes with the diameter of 25mm, the diameter of 20mm, the diameter of 15mm, the diameter of 10mm, the diameter of 8mm and the diameter of 5mm are respectively processed on the steel epoxy sleeve filling defect ultrasonic comparison test block and are all processed to an upper steel-epoxy interface to simulate the steel epoxy sleeve filling defect.
7. The ultrasonic detection method for the filling defect of the steel epoxy sleeve for the oil and gas long-distance pipeline according to claim 1, which is characterized by comprising the following steps of: and in the S4, the specification of a second reference block is consistent with that of the steel epoxy sleeve defect filling ultrasonic reference block, and the manufacturing method of the second reference block is the same as that of the steel epoxy sleeve defect filling ultrasonic reference block.
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