CN108802169A - Detection device in a kind of pipe-line - Google Patents

Detection device in a kind of pipe-line Download PDF

Info

Publication number
CN108802169A
CN108802169A CN201710291057.5A CN201710291057A CN108802169A CN 108802169 A CN108802169 A CN 108802169A CN 201710291057 A CN201710291057 A CN 201710291057A CN 108802169 A CN108802169 A CN 108802169A
Authority
CN
China
Prior art keywords
unit
detection
driving
spring
magnetic flux
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
Application number
CN201710291057.5A
Other languages
Chinese (zh)
Inventor
韩来聚
张士华
孙永泰
闫彦
高慧
田凯
王宏安
史永晋
初新杰
傅忠尧
李明朝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Original Assignee
Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sinopec Oilfield Service Corp, Sinopec Shengli Petroleum Engineering Corp, Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp filed Critical Sinopec Oilfield Service Corp
Priority to CN201710291057.5A priority Critical patent/CN108802169A/en
Publication of CN108802169A publication Critical patent/CN108802169A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/83Investigating 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

Abstract

The present invention relates to a kind of novel interior detection devices of pipe-line, applied to the non-destructive testing of pipe-line, it is made of driving detection unit, Hooks coupling universal coupling I, Magnetic Flux Leakage Inspecting unit, Hooks coupling universal coupling II, information storage unit, pendulum-type shaft coupling, mileage measuring unit;Driving detection unit is connect by Hooks coupling universal coupling I with Magnetic Flux Leakage Inspecting unit, Magnetic Flux Leakage Inspecting unit is connect by Hooks coupling universal coupling II with information storage unit, information storage unit is connect by pendulum-type shaft coupling with mileage measuring unit, passes through cable connection between each unit.The detection device is connected using multiple units by Hooks coupling universal coupling, and is optimized to each unit, its obstacle climbing ability and detection reliability in pipeline is enhanced;Driving unit is detected as pipeline shape, improves detection quality and accuracy;Magnetic Flux Leakage Inspecting unit is compacter and improves accuracy of detection;The ralocatable mode and structure of probe cassette make sensor be adjacent to tube wall well, improve accuracy of detection.

Description

Detection device in a kind of pipe-line
Technical field
The present invention relates to a kind of novel interior detection devices of pipe-line, are applied to the lossless inspection of pipe-line It surveys.
Background technology
The features such as oil gas pipeline is economic, efficient with it is widely used, and pipeline completes and use one in laying It will appear defect after the section time and influence safe to use, therefore periodic detection need to be carried out.It uses interior detection method more at present, such as leaks Magnetic, ultrasound etc., Magnetic Flux Leakage Inspecting is because it requires low application most pipeline technological factor, but present flux leakage detector is only capable of detecting The relative wall thickness of pipeline defect and size can not provide the change in shape of pipeline, while many pipelines(Especially small-bore seabed Pipeline)Deformation affected by various factors is big, can not be detected, and there is likely to be blocking risks when detection.
Invention content
The purpose of the present invention is to provide a kind of novel interior detection devices of pipe-line(Abbreviation detection device), can Complete detection pipeline form and whether there is defect, the detection device have it is easy to operate, light-weight, handling capacity is strong, managed Wiring technology factor influences small, the features such as occupying little space, and can realize the complete detection of pipeline.
The novel interior detection device of a kind of pipe-line of the present invention by driving detection unit, Hooks coupling universal coupling I, Magnetic Flux Leakage Inspecting unit, Hooks coupling universal coupling II, information storage unit, pendulum-type shaft coupling, mileage measuring unit composition;Driving detection is single Member is connect by Hooks coupling universal coupling I with Magnetic Flux Leakage Inspecting unit, and Magnetic Flux Leakage Inspecting unit is stored single by Hooks coupling universal coupling II and information Member connection, information storage unit are connect by pendulum-type shaft coupling with mileage measuring unit, pass through cable connection between each unit.
The driving detection unit of the present invention is by driving leather cup, driving main body, bearing, axis, angular displacement sensor, torsional spring, spy Arm forms, and the rear and front end of main body is driven to be fixed with driving leather cup, and centre position circumferentially multiple bearings drive in main body Portion sets sealed compartment, placement information processing system in sealed compartment;It visits arm to connect with bearing by axis, angular displacement sensor, torsional spring are solid It is scheduled on bearing, spy arm quantity is even number.
The Magnetic Flux Leakage Inspecting unit of the present invention by guide plate, tension spring, connecting rod, preceding solid block, mandrel, steel brush, permanent magnet, magnetizer, Probe cassette, probe cassette support spring, probe cassette connecting rod, support spring, even spring, afterwards consolidate block, sets of confinement rings at;Spindle center is provided with through-hole, right Support spring position is answered to be equipped with slot, front end resting guide, tail end fixed constraint ring;It is evenly arranged multiple magnetic conductions along mandrel circumferencial direction Solid block after preceding solid block, tail end fixation, outer surface both ends fixed permanent magnet, outer surface are fixed in the front end of body, corresponding each magnetizer Middle part forms parallelogram mechanism by probe cassette connecting rod, probe cassette, and probe cassette support spring one end is fixed in the hole on magnetizer, The other end and probe cassette contacts baseplate, with mandrel foreign circle face with rigid staybolt spring is merged, steel brush is arranged in permanent magnetism for magnetizer lower surface External surface is simultaneously fixed on magnetizer;Corresponding each preceding solid block is connected with corresponding tension spring, connecting rod respectively, and tension spring, connecting rod are another One end is connect with mandrel front end;Consolidate block afterwards to be arranged in confinement ring;The probe convex structure of box outer surfac, it is interior to press circumferential direction It is arranged in juxtaposition integrated circuit and multiple magnetic induction sensors, magnetic induction sensor is close at probe cassette bulge-structure;It is solid before multiple Pass through even spring connection between block;Pass through even spring connection between multiple rear blocks admittedly.
The information storage unit of the present invention is made of main body and support leather cup, and support leather cup is fixed on main body both ends, thereon It is disposed with permeable hole and groove, body interior is equipped with sealed compartment, power supply, memory and control system are disposed in sealed compartment.
The effect of invention:The present invention is connected using multiple units by Hooks coupling universal coupling, and is optimized to each unit Design enhances its obstacle climbing ability and detection reliability in pipeline;Driving unit is detected as pipeline shape, and and leakage field Detection combination together, can preferably describe the actual state of pipeline, improve detection quality and accuracy, can also reduce operation Intensity;Link mechanism, special type spring and the steel brush that Magnetic Flux Leakage Inspecting unit uses keep structure compacter and improve accuracy of detection;It visits The ralocatable mode and structure of head cartridge make sensor be adjacent to tube wall well, improve accuracy of detection;Especially suitable for small pipe-line Detection.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the novel interior detection device of pipe-line
Fig. 2 is a kind of side view of the novel interior detection device of pipe-line
1, detection unit 2, driving leather cup 3, driving main body are driven
4, bearing 5, axis 6, angular displacement sensor
7, torsional spring 8, spy arm 9, Hooks coupling universal coupling I
10, Magnetic Flux Leakage Inspecting unit 11, guide plate 12, tension spring
13, connecting rod 14, preceding solid block 15, mandrel
16, steel brush 17, permanent magnet 18, magnetizer
19, probe cassette 20, probe cassette support spring 21, probe cassette connecting rod
22, support spring 23, even spring 24, afterwards consolidate block
25, confinement ring 26, Hooks coupling universal coupling II 27, information storage unit
28, main body 29, support leather cup 30, pendulum-type shaft coupling
31, mileage measuring unit
Specific implementation mode
In conjunction with Figure of description 1, the invention will be further described for attached drawing 2:
A kind of novel interior detection device of pipe-line is by driving detection unit 1, Hooks coupling universal coupling I 9, Magnetic Flux Leakage Inspecting unit 10, Hooks coupling universal coupling II 26, information storage unit 27, pendulum-type shaft coupling 30, mileage measuring unit 31 form;Drive detection unit 1 is made of driving leather cup 2, driving main body 3, bearing 4, axis 5, angular displacement sensor 6, torsional spring 7, spy arm 8, passes through electricity between each unit Cable connects;Magnetic Flux Leakage Inspecting unit 10 by guide plate 11, tension spring 12, connecting rod 13, preceding solid block 14, mandrel 15, steel brush 16, permanent magnet 17, Magnetizer 18, probe cassette 19, probe cassette support spring 20, probe cassette connecting rod 21, support spring 22, even spring 23, rear block 24,25 groups of confinement ring admittedly At;Information storage unit 27 is made of main body 28 and support leather cup 29.
A kind of effect of the novel interior detection device of pipe-line is exactly to be moved by its in-line portion, detects pipeline Metal loss and deformation condition realize the complete detection to pipeline.Specifically operation process is:Drive detection unit 1 by universal Shaft coupling I 9 is connect with Magnetic Flux Leakage Inspecting unit 10, and Magnetic Flux Leakage Inspecting unit 10 passes through Hooks coupling universal coupling II 26 and information storage unit 27 Connection, information storage unit 27 are connect with mileage measuring unit 31 by pendulum-type shaft coupling 30, are joined by cable between each unit It is logical, collectively constitute detection device;Driving detection unit 1 is deformed for driving package unit to be moved in pipeline and detecting pipeline, Magnetic Flux Leakage Inspecting unit 10 is detected for detecting pipeline metal loss situation, mileage measuring unit 31 for measuring mobile mileage Information storage in information storage unit 27 is all transmitted to by cable.Driving detection unit 1 operation mechanism be:Driving inspection It surveys on unit 1 and is disposed with multiple spy arms 8, in in-pipe, each arm 8 of visiting will drive phase with the tube wall variation of corresponding contact Axis 5 is answered to be rotated relative to bearing 4, angular displacement sensor 6 can measure at information and the information by being built into driving main body 3 The storage of information storage unit 27 is transmitted to after the processing of reason system;The operation mechanism of Magnetic Flux Leakage Inspecting unit 10 is:By magnetizer 18, forever Magnet 17,16 magnetic circuit block of steel brush, 10 upper edge mandrel of Magnetic Flux Leakage Inspecting unit, 15 circumferencial direction have been evenly arranged multiple magnetic circuit blocks, magnetic circuit Block and the tube wall of contact form magnetic loop, occur leakage field phenomenon after defect occurs in tube wall, by being close in the probe cassette 19 of tube wall The magnetic induction sensor of setting detects information, and transfers information to information storage unit 27, and magnetic circuit block front and back end is solid respectively Surely solid block 14 and rear block 23,13 one end of connecting rod admittedly are connect by axis pin with 15 front end of axis pin before having, and the other end is by axis pin with before Gu block 14 connects, block 24 is positioned by the confinement ring 25 for being fixed on axis pin tail end admittedly afterwards, and tension spring 12, support spring 22 keep magnetic circuit block tight always Tube wall is pasted, probe cassette 19 is connected to by probe cassette connecting rod on the outer surface of magnetizer 18 and is formed parallelogram mechanism, visits Head cartridge support spring 20 makes the protrusion of probe cassette 19 part be close to tube wall, and multiple probes and circuit board, magnetic induction are disposed in probe cassette 19 Sensor is adjacent at 19 bulge-structure of probe cassette, and guide plate 11 is fixed on the front end of mandrel 15, for guiding and anticollision;Information stores The operation mechanism of unit 27 is:Support leather cup 29 is fixed on the both ends of main body 28, plays a supportive role, and sealing is equipped in main body 28 Cabin is disposed with power supply, memory and control system in cabin, for powering, information processing and storage and information export, self-test etc., It supports leather cup to be equipped with permeable hole and groove, pipeline internal medium is enable to pass through and is applied on driving leather cup 2.When detection, it will examine After survey device is launched into pipeline, driving leather cup 2 drives a whole set of detection device in pipeline under the pressure-driven of pipeline internal medium Interior movement, the information detected by real-time storage after device to be detected takes out from pipeline, export deposited information, by leading Go out information analysis, you can realize the detection to pipeline.

Claims (4)

1. a kind of novel interior detection device of pipe-line is by driving detection unit(1), Hooks coupling universal coupling I(9), Magnetic Flux Leakage Inspecting Unit(10), Hooks coupling universal coupling II(26), information storage unit(27), pendulum-type shaft coupling(30), mileage measuring unit(31)Group At;Drive detection unit(1)Pass through Hooks coupling universal coupling I(9)With Magnetic Flux Leakage Inspecting unit(10)Connection, Magnetic Flux Leakage Inspecting unit(10)It is logical Cross Hooks coupling universal coupling II(26)With information storage unit(27)Connection, information storage unit(27)Pass through pendulum-type shaft coupling(30)With Mileage measuring unit(31)It connects, passes through cable connection between each unit.
2. the novel interior detection device of a kind of pipe-line according to claim 1, it is characterized in that driving detection unit (1)By driving leather cup(2), driving main body(3), bearing(4), axis(5), angular displacement sensor(6), torsional spring(7), visit arm(8)Group At driving main body(3)Rear and front end be fixed with driving leather cup(2), centre position circumferentially multiple bearings(4), driving Main body(3)Inside sets sealed compartment, placement information processing system in sealed compartment;Visit arm(8)Pass through axis(5)With bearing(4)Connection, angle Displacement sensor(6), torsional spring(7)It is fixed on bearing(4)On, visit arm(8)Quantity is even number.
3. the novel interior detection device of a kind of pipe-line according to claim 1, it is characterized in that Magnetic Flux Leakage Inspecting unit (10)By guide plate(11), tension spring(12), connecting rod(13), preceding solid block(14), mandrel(15), steel brush(16), permanent magnet(17), magnetic conduction Body(18), probe cassette(19), probe cassette support spring(20), probe cassette connecting rod(21), support spring(22), even spring(23), afterwards consolidate block(24), Confinement ring(25)Composition;Mandrel(15)Center is provided with through-hole, corresponding support spring(22)Position is equipped with slot, front end resting guide(11), Tail end fixed constraint ring(25);It is evenly arranged multiple magnetizers along mandrel circumferencial direction(18), corresponding each magnetizer(18)'s Front end solid block before fixing(14), tail end solid block after fixing(24), outer surface both ends fixed permanent magnet(17), outer surface middle part is by visiting Head cartridge connecting rod(21), probe cassette(19)Form parallelogram mechanism, probe cassette support spring(20)One end is fixed on magnetizer(18) On hole in, the other end and probe cassette(19)Contacts baseplate, magnetizer(18)Lower surface and mandrel(15)Periphery is solid with merging Surely there is support spring(22), steel brush(16)It is arranged in permanent magnet(17)Outside is simultaneously fixed on magnetizer(18)On;Corresponding each preceding solid block (14)Respectively with corresponding tension spring(12), connecting rod(13)Connection, tension spring(12), connecting rod(13)The other end and mandrel(15)Front end connects It connects;Consolidate block afterwards(24)L-shaped, tail end is arranged in confinement ring(25)Interior and and confinement ring(25)Cooperation;Probe cassette(19)Outside The convex structure in surface, it is interior to be arranged in juxtaposition integrated circuit and multiple magnetic induction sensors, magnetic induction sensor by circumferential direction It is close at probe cassette bulge-structure;Solid block before multiple(14)Between pass through even spring(23)Connection;Consolidate block after multiple(24)Between pass through company Spring(23)Connection.
4. the novel interior detection device of a kind of pipe-line according to claim 1, it is characterized in that information storage unit (27)By main body(28)With support leather cup(29)Composition supports leather cup(29)It is fixed on main body(28)Both ends are disposed with thereon Water hole and groove, main body(28)It is internally provided with sealed compartment, power supply, memory and control system are disposed in sealed compartment.
CN201710291057.5A 2017-04-28 2017-04-28 Detection device in a kind of pipe-line Pending CN108802169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710291057.5A CN108802169A (en) 2017-04-28 2017-04-28 Detection device in a kind of pipe-line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710291057.5A CN108802169A (en) 2017-04-28 2017-04-28 Detection device in a kind of pipe-line

Publications (1)

Publication Number Publication Date
CN108802169A true CN108802169A (en) 2018-11-13

Family

ID=64069949

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710291057.5A Pending CN108802169A (en) 2017-04-28 2017-04-28 Detection device in a kind of pipe-line

Country Status (1)

Country Link
CN (1) CN108802169A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112856098A (en) * 2021-01-23 2021-05-28 北京埃彼咨能源科技有限公司 Combined three-dimensional magnetic flux leakage imaging internal detector
CN112881514A (en) * 2021-01-22 2021-06-01 北京埃彼咨能源科技有限公司 Magnetic leakage imaging internal detector for oil and gas pipeline
CN112881515A (en) * 2021-01-24 2021-06-01 北京埃彼咨能源科技有限公司 Three-dimensional magnetic flux leakage imaging detector in multi-section combined pipeline
CN112903809A (en) * 2021-01-23 2021-06-04 北京埃彼咨能源科技有限公司 Multisection magnetic leakage imaging inner detector with ID-OD identification function

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447777A (en) * 1980-10-17 1984-05-08 British Gas Corporation Magnetic pipeline inspection vehicle with metallic foil and bristle contacts supporting the vehicle
CN1828284A (en) * 2006-04-06 2006-09-06 上海交通大学 Pipe detection defect positioning system
RU2334980C1 (en) * 2007-04-23 2008-09-27 Закрытое акционерное общество "Газприборавтоматикасервис" Intratubal gear-defectoscope with rotary odometers
CN101819181A (en) * 2010-04-09 2010-09-01 新疆三叶管道技术有限责任公司 Pipeline defect and magnetic leakage detection device
CN201884941U (en) * 2010-11-04 2011-06-29 中国石油天然气集团公司 Magnetic circuit structure of pipeline magnetic flux leakage corrosion detector
CN203657734U (en) * 2014-01-24 2014-06-18 中国石化集团胜利石油管理局海上石油工程技术检验中心 Variable diameter magnetic leakage detection apparatus in petroleum pipeline
CN104748711A (en) * 2013-12-31 2015-07-01 中国石油化工集团公司 Mileage measuring mechanism for inner detection of pipeline
CN104764801A (en) * 2015-04-08 2015-07-08 沈阳仪表科学研究院有限公司 Magnetic leakage corrosion track detector for inner wall of pipeline
CN105806936A (en) * 2014-12-29 2016-07-27 中石化胜利石油工程有限公司钻井工艺研究院 Pipeline defect detection device and data analysis method
CN206930619U (en) * 2017-04-28 2018-01-26 中石化石油工程技术服务有限公司 Detection means in a kind of pipe-line

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447777A (en) * 1980-10-17 1984-05-08 British Gas Corporation Magnetic pipeline inspection vehicle with metallic foil and bristle contacts supporting the vehicle
CN1828284A (en) * 2006-04-06 2006-09-06 上海交通大学 Pipe detection defect positioning system
RU2334980C1 (en) * 2007-04-23 2008-09-27 Закрытое акционерное общество "Газприборавтоматикасервис" Intratubal gear-defectoscope with rotary odometers
CN101819181A (en) * 2010-04-09 2010-09-01 新疆三叶管道技术有限责任公司 Pipeline defect and magnetic leakage detection device
CN201884941U (en) * 2010-11-04 2011-06-29 中国石油天然气集团公司 Magnetic circuit structure of pipeline magnetic flux leakage corrosion detector
CN104748711A (en) * 2013-12-31 2015-07-01 中国石油化工集团公司 Mileage measuring mechanism for inner detection of pipeline
CN203657734U (en) * 2014-01-24 2014-06-18 中国石化集团胜利石油管理局海上石油工程技术检验中心 Variable diameter magnetic leakage detection apparatus in petroleum pipeline
CN105806936A (en) * 2014-12-29 2016-07-27 中石化胜利石油工程有限公司钻井工艺研究院 Pipeline defect detection device and data analysis method
CN104764801A (en) * 2015-04-08 2015-07-08 沈阳仪表科学研究院有限公司 Magnetic leakage corrosion track detector for inner wall of pipeline
CN206930619U (en) * 2017-04-28 2018-01-26 中石化石油工程技术服务有限公司 Detection means in a kind of pipe-line

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112881514A (en) * 2021-01-22 2021-06-01 北京埃彼咨能源科技有限公司 Magnetic leakage imaging internal detector for oil and gas pipeline
CN112881514B (en) * 2021-01-22 2023-08-29 北京埃彼咨能源科技有限公司 Magnetic leakage imaging internal detector for oil and gas pipeline
CN112856098A (en) * 2021-01-23 2021-05-28 北京埃彼咨能源科技有限公司 Combined three-dimensional magnetic flux leakage imaging internal detector
CN112903809A (en) * 2021-01-23 2021-06-04 北京埃彼咨能源科技有限公司 Multisection magnetic leakage imaging inner detector with ID-OD identification function
CN112881515A (en) * 2021-01-24 2021-06-01 北京埃彼咨能源科技有限公司 Three-dimensional magnetic flux leakage imaging detector in multi-section combined pipeline
CN112881515B (en) * 2021-01-24 2023-12-01 北京埃彼咨能源科技有限公司 Three-dimensional magnetic leakage imaging detector in multi-section combined pipeline

Similar Documents

Publication Publication Date Title
CN206930619U (en) Detection means in a kind of pipe-line
CN108802169A (en) Detection device in a kind of pipe-line
WO2023015675A1 (en) Pipeline nondestructive testing device
US8949042B1 (en) AUV pipeline inspection using magnetic tomography
CA2630050C (en) Pulsed eddy current pipeline inspection system and method
CN2411484Y (en) Corrosion defect detection device for underground on-service long distance pipeline
CN108426943B (en) Variable diameter magnetic flux leakage detection device in pipeline
US20190072522A1 (en) System and Method for Detecting and Characterizing Defects in a Pipe
EP3281003B1 (en) In-line inspection tool
CN204405601U (en) A kind of defect inspection device
US8892378B2 (en) Intelligent tool for detecting perforations and interpretation of data online
CN109115882B (en) Low-frequency ultrasonic automatic flaw detection device capable of flexibly and adaptively detecting pipeline
CN214585088U (en) Pipeline detection device
CN113588774B (en) Acoustic-magnetic combined detector in pipeline
CN103512483A (en) Overhead pipe wall thickness corrosion scanning and detecting system
RU2697007C1 (en) Device for in-pipe diagnostics of pipeline technical state
CN108343802A (en) Detection device in a kind of pipe electromagnetic
RU2619826C1 (en) Device for internal defectoscopy of pipeline walls
CN204044113U (en) A kind of heat exchanger tube sheet fillet weld ultrasound wave automatic detection device
CN207908434U (en) A kind of multifunctional combination probe for pipeline detection
RU2149367C1 (en) Device for diagnosis of pipe-lines
Wang et al. Development of new pipeline maintenance system for repairing early-built offshore oil pipelines
JPS59200959A (en) Traveling body in pipe
RU220375U1 (en) DEVICE FOR CONTROL OF RING WELDED JOINTS OF PIPELINES
CN210427443U (en) Metal pipeline detection device

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