NO20003445D0 - FremgangsmÕte og apparat for ultralydavbildning av en rørbrann - Google Patents

FremgangsmÕte og apparat for ultralydavbildning av en rørbrann

Info

Publication number
NO20003445D0
NO20003445D0 NO20003445A NO20003445A NO20003445D0 NO 20003445 D0 NO20003445 D0 NO 20003445D0 NO 20003445 A NO20003445 A NO 20003445A NO 20003445 A NO20003445 A NO 20003445A NO 20003445 D0 NO20003445 D0 NO 20003445D0
Authority
NO
Norway
Prior art keywords
ultrasound imaging
pipe fire
fire
pipe
ultrasound
Prior art date
Application number
NO20003445A
Other languages
English (en)
Other versions
NO331325B1 (no
NO20003445L (no
Inventor
Smaine Zeroug
Original Assignee
Schlumberger Technology Bv
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 Schlumberger Technology Bv filed Critical Schlumberger Technology Bv
Publication of NO20003445D0 publication Critical patent/NO20003445D0/no
Publication of NO20003445L publication Critical patent/NO20003445L/no
Publication of NO331325B1 publication Critical patent/NO331325B1/no

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00Investigating 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
    • G01N29/22Details, e.g. general constructional or apparatus details
    • G01N29/26Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/265Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • E21B47/005Monitoring or checking of cementation quality or level
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/539Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
    • G01V1/44Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/01Indexing codes associated with the measuring variable
    • G01N2291/011Velocity or travel time
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/01Indexing codes associated with the measuring variable
    • G01N2291/015Attenuation, scattering
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/01Indexing codes associated with the measuring variable
    • G01N2291/018Impedance
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/02Indexing codes associated with the analysed material
    • G01N2291/024Mixtures
    • G01N2291/0245Gases in porous solids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/042Wave modes
    • G01N2291/0421Longitudinal waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/042Wave modes
    • G01N2291/0422Shear waves, transverse waves, horizontally polarised waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/042Wave modes
    • G01N2291/0427Flexural waves, plate waves, e.g. Lamb waves, tuning fork, cantilever
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/044Internal reflections (echoes), e.g. on walls or defects
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/056Angular incidence, angular propagation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/04Wave modes and trajectories
    • G01N2291/057Angular incidence, parallel to surface propagation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00Indexing codes associated with group G01N29/00
    • G01N2291/26Scanned objects
    • G01N2291/263Surfaces
    • G01N2291/2636Surfaces cylindrical from inside

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Quality & Reliability (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
NO20003445A 1998-01-06 2000-07-03 Fremgangsmate og apparat for ultrasonisk avbildning av en fôret bronn NO331325B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7053198P 1998-01-06 1998-01-06
PCT/US1999/000207 WO1999035490A1 (en) 1998-01-06 1999-01-06 Method and apparatus for ultrasonic imaging of a cased well

Publications (3)

Publication Number Publication Date
NO20003445D0 true NO20003445D0 (no) 2000-07-03
NO20003445L NO20003445L (no) 2000-09-04
NO331325B1 NO331325B1 (no) 2011-11-28

Family

ID=22095845

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20003445A NO331325B1 (no) 1998-01-06 2000-07-03 Fremgangsmate og apparat for ultrasonisk avbildning av en fôret bronn

Country Status (7)

Country Link
US (1) US6483777B1 (no)
EP (1) EP1047935B1 (no)
CN (1) CN1211654C (no)
CA (1) CA2316265C (no)
NO (1) NO331325B1 (no)
RU (1) RU2213358C2 (no)
WO (1) WO1999035490A1 (no)

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6678616B1 (en) * 1999-11-05 2004-01-13 Schlumberger Technology Corporation Method and tool for producing a formation velocity image data set
US6941819B1 (en) * 2001-09-28 2005-09-13 Chandler Instruments Company L.L.C. Apparatus and method for determining the dynamic mechanical properties of a cement sample
US7292942B2 (en) * 2003-01-24 2007-11-06 Schlumberger Technology Corporation Measuring formation density through casing
DK1505252T3 (da) * 2003-08-08 2006-01-30 Schlumberger Technology Bv Akustisk multimodebilleddannelse i forede brönde
US7663969B2 (en) * 2005-03-02 2010-02-16 Baker Hughes Incorporated Use of Lamb waves in cement bond logging
EP1672168B1 (en) * 2004-12-20 2008-02-06 Services Petroliers Schlumberger Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements
EP1672169B1 (en) * 2004-12-20 2009-07-22 Services Petroliers Schlumberger Method to measure and locate a fluid communication pathway in a material behind a casing
US8256565B2 (en) * 2005-05-10 2012-09-04 Schlumberger Technology Corporation Enclosures for containing transducers and electronics on a downhole tool
US7913806B2 (en) * 2005-05-10 2011-03-29 Schlumberger Technology Corporation Enclosures for containing transducers and electronics on a downhole tool
US7681450B2 (en) * 2005-12-09 2010-03-23 Baker Hughes Incorporated Casing resonant radial flexural modes in cement bond evaluation
US20070213935A1 (en) * 2005-12-29 2007-09-13 Schlumberger Technology Corporation Method and System to Display Well Properties Information
US7773454B2 (en) * 2006-02-22 2010-08-10 Baker Hughes Incorporated Method and apparatus for cement evaluation using multiple acoustic wave types
US7787327B2 (en) * 2006-11-15 2010-08-31 Baker Hughes Incorporated Cement bond analysis
US7677104B2 (en) * 2006-12-20 2010-03-16 Chandler Instruments Company, LLC Acoustic transducer system for nondestructive testing of cement
US8194497B2 (en) * 2007-01-16 2012-06-05 Precision Energy Services, Inc. Reduction of tool eccentricity effects on acoustic measurements
US7504984B1 (en) 2007-03-30 2009-03-17 The United States Of America As Represented By The Secretary Of The Air Force Large scale imaging with spatially-coded waveforms
US8611183B2 (en) * 2007-11-07 2013-12-17 Schlumberger Technology Corporation Measuring standoff and borehole geometry
US7639563B2 (en) * 2007-12-27 2009-12-29 Schlumberger Technology Corporation Method for sonic indication of voids in casing cement
US20090231954A1 (en) * 2008-03-17 2009-09-17 Baker Hughes Incorporated Micro-Annulus Detection Using Lamb Waves
US20110182141A1 (en) * 2008-08-14 2011-07-28 Schlumberger Technology Corporation Method and system for monitoring a logging tool position in a borehole
US9328606B2 (en) * 2011-01-06 2016-05-03 Schlumberger Technology Corporation Method and device to measure perforation tunnel dimensions
US8861307B2 (en) 2011-09-14 2014-10-14 Schlumberger Technology Corporation Acoustic logging while drilling tool with active control of source orientation
US20140052376A1 (en) * 2012-08-15 2014-02-20 Pingjun Guo Method for Cement Evaluation with Acoustic and Nuclear Density Logs
US9273545B2 (en) 2012-12-23 2016-03-01 Baker Hughes Incorporated Use of Lamb and SH attenuations to estimate cement Vp and Vs in cased borehole
EP2803815B1 (en) * 2013-05-16 2020-02-12 Services Petroliers Schlumberger Methods for Data Driven Parametric Correction of Acoustic Cement Evaluation Data
US10301932B2 (en) 2013-08-15 2019-05-28 Halliburton Energy Services, Inc. Ultrasonic casing and cement evaluation method using a ray tracing model
US10577915B2 (en) 2014-01-16 2020-03-03 Schlumberger Technology Corporation Sonic logging for assessing well integrity
CN103791866A (zh) * 2014-01-20 2014-05-14 河北建设勘察研究院有限公司 一种大直径竖井孔形检测方法
US9784875B2 (en) * 2014-01-31 2017-10-10 Schlumberger Technology Corporation Method to estimate cement acoustic wave speeds from data acquired by a cased hole ultrasonic cement evaluation tool
EP2908124A1 (en) 2014-02-18 2015-08-19 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Method and a system for ultrasonic inspection of well bores
WO2015130317A1 (en) * 2014-02-28 2015-09-03 Halliburton Energy Services, Inc. Well treatment design based on three-dimensional wellbore shape
WO2015157270A1 (en) * 2014-04-10 2015-10-15 Halliburton Energy Services, Inc. Casing string monitoring using electro-magnetic (em) corrosion detection tool and junction effects correction
RU2560756C1 (ru) * 2014-05-16 2015-08-20 Общество с ограниченной ответственностью "Научно-производственный центр неразрушающего контроля "ЭХО+" Способ ускорения регистрации эхо-сигналов с помощью ультразвуковой антенной решетки
GB2528888A (en) * 2014-08-01 2016-02-10 Maersk Olie & Gas Method, downhole tool and transducer for echo inspection of a well bore
WO2016040136A1 (en) * 2014-09-10 2016-03-17 Halliburton Energy Services, Inc. Multi-sensor workflow for evaluation of gas flow in multiple casing strings
WO2016069753A1 (en) * 2014-10-28 2016-05-06 Chevron U.S.A. Inc. A system and method of detecting well integrity failure
US10344582B2 (en) 2014-12-24 2019-07-09 Statoil Petroleum As Evaluation of downhole installation
GB2531836B (en) 2014-12-24 2020-10-14 Equinor Energy As Logging system and method for evaluation of downhole installation
CN105804724B (zh) * 2014-12-29 2023-08-22 何建辉 一种石油钻井超声波液位监控装置
WO2016145524A1 (en) 2015-03-16 2016-09-22 Darkvision Technologies Inc. Device and method to image flow in oil and gas wells using phased array doppler ultrasound
EP3088884A1 (en) 2015-04-28 2016-11-02 Uniper Technologies Limited Method and system for ultrasonically determining the condition of a building structure
EP3151037A1 (en) 2015-09-30 2017-04-05 Services Pétroliers Schlumberger Systems and methods for evaluating annular material using beamforming from acoustic arrays
CA2999363C (en) 2015-10-09 2023-02-21 Osman S. MALIK Devices and methods for imaging wells using phased array ultrasound
US10156653B2 (en) * 2015-12-18 2018-12-18 Schlumberger Technology Corporation Techniques for removing interface noise from acoustic log data
US10544671B2 (en) 2016-11-06 2020-01-28 Halliburton Energy Services, Inc. Automated inversion workflow for defect detection tools
RU2646955C1 (ru) * 2016-12-29 2018-03-12 Общество с ограниченной ответственностью "Научно-производственный центр неразрушающего контроля "ЭХО+" Способ создания неполной коммутационной матрицы при использовании антенных решеток
EP3404202A1 (en) 2017-05-15 2018-11-21 Services Petroliers Schlumberger Flexural wave measurement for thick casings
US10605944B2 (en) 2017-06-23 2020-03-31 Baker Hughes, A Ge Company, Llc Formation acoustic property measurement with beam-angled transducer array
US11428670B2 (en) 2017-12-18 2022-08-30 Halliburton Energy Services, Inc. Application of ultrasonic inspection to downhole conveyance devices
JP6926011B2 (ja) * 2018-02-07 2021-08-25 株式会社東芝 超音波探傷装置および超音波探傷方法
RU2697725C1 (ru) * 2018-12-10 2019-08-19 Общество с ограниченной ответственностью "Научно-производственный центр неразрушающего контроля "ЭХО+" (ООО "НПЦ "ЭХО+") Способ ультразвукового контроля методом фазированной антенной решетки с использованием дефектоскопа с малым количеством независимых каналов
US11719090B2 (en) 2019-03-22 2023-08-08 Baker Hughes Oilfield Operations Llc Enhanced cement bond and micro-annulus detection and analysis
CN110159253A (zh) * 2019-06-20 2019-08-23 太平洋远景石油技术(北京)有限公司 一种超声波成像测井方法
CN110333487B (zh) * 2019-08-13 2023-04-07 四川朝阳公路试验检测有限公司 一种竖井探地雷达检测系统及其使用方法
NO20211418A1 (en) 2019-08-30 2021-11-22 Halliburton Energy Services Inc Method and apparatus for geophysical formation evaluation measurements behind casing
EP3862796A1 (en) 2020-02-06 2021-08-11 Services Pétroliers Schlumberger Real-time reconfiguration of phased array operation
GB2592974A (en) * 2020-03-12 2021-09-15 Equanostic As Method for differentiating materials on a remote side of a partition based on the attenuation of the ultrasonic extensional zero mode
EP3995865A1 (en) 2020-11-06 2022-05-11 Services Pétroliers Schlumberger Automatic recognition of environmental parameters with azimuthally distributed transducers
GB2616562A (en) * 2020-12-04 2023-09-13 Baker Hughes Oilfield Operations Llc Methodology for annular solids and fluids differentiation through integration of shear and flexural ultrasonic acoustic waves
US11808136B2 (en) * 2021-05-27 2023-11-07 Halliburton Energy Services, Inc. Through-tubing, cased-hole sealed material evaluation using acoustic measurements
BR112024001195A2 (pt) * 2021-07-21 2024-04-30 Schlumberger Technology Bv Métodos para quantificação in situ de ligação acústica interfacial cimento-revestimento ou formação-revestimento e relação com as propriedades hidráulicas de tal interface
US20230203933A1 (en) * 2021-12-29 2023-06-29 Halliburton Energy Services, Inc. Real time drilling model updates and parameter recommendations with caliper measurements

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538114A (en) 1944-10-17 1951-01-16 Bell Telephone Labor Inc Thickness measurement
US3401773A (en) 1967-12-04 1968-09-17 Schlumberger Technology Survey Method and apparatus for cement logging of cased boreholes
US4255798A (en) 1978-05-30 1981-03-10 Schlumberger Technology Corp. Method and apparatus for acoustically investigating a casing and cement bond in a borehole
US4779236A (en) 1986-07-28 1988-10-18 Amoco Corporation Acoustic well logging method and system
US4813028A (en) 1987-07-07 1989-03-14 Schlumberger Technology Corporation Acoustic well logging method and apparatus
US5001676A (en) 1990-04-27 1991-03-19 Mobil Oil Corporation Acoustic borehole logging
MY111633A (en) * 1991-12-17 2000-10-31 Schlumberger Technology Bv Method and apparatus for hydraulic isolation determination
US5168470A (en) 1992-01-23 1992-12-01 Mobil Oil Corporation Apparatus for rotating a transducer assembly of a borehole logging tool in a deviated borehole
US5357481A (en) 1992-11-04 1994-10-18 Western Atlas International, Inc. Borehole logging tool
US5475650A (en) * 1993-11-19 1995-12-12 Schlumberger Technology Corporation Measurement of nonlinear properties of formation using sonic borehole tool while changing pressure in borehole
US5859811A (en) 1996-02-29 1999-01-12 Schlumberger Technology Corporation Method of analyzing waveforms
US5763773A (en) 1996-09-20 1998-06-09 Halliburton Energy Services, Inc. Rotating multi-parameter bond tool

Also Published As

Publication number Publication date
US6483777B1 (en) 2002-11-19
WO1999035490A1 (en) 1999-07-15
CN1292088A (zh) 2001-04-18
RU2213358C2 (ru) 2003-09-27
NO331325B1 (no) 2011-11-28
CA2316265C (en) 2008-03-25
EP1047935A1 (en) 2000-11-02
EP1047935B1 (en) 2005-08-10
CA2316265A1 (en) 1999-07-15
CN1211654C (zh) 2005-07-20
NO20003445L (no) 2000-09-04

Similar Documents

Publication Publication Date Title
NO20003445D0 (no) FremgangsmÕte og apparat for ultralydavbildning av en rørbrann
NO971692D0 (no) Fremgangsmåte og anordning for inspeksjon av borehullrör
NO20012705L (no) Fremgangsmåte og apparat for bestemmelse av posisjonen i et rör
NO973364D0 (no) Fremgangsmåte og anordning for måling av gjennomströmning ved hjelp av ultralyd
NO993498L (no) Apparat og fremgangsmÕte til innretting av rör
NO20001943D0 (no) Apparat og fremgangsmõte for utplassering av rørledningskabel
NO984398D0 (no) FremgangsmÕte og apparat for koherensfiltrering av ultralydbilder
NO343783B1 (no) Apparat og fremgangsmåte for ultralydinspeksjon av et rør
NO20003262D0 (no) FremgangsmÕte og apparat for Õ bestemme lokalisering til særpreg for en rørledning
NO983245L (no) FremgangsmÕte og apparat for fastsettelse av formasjonstrykk
NO990233D0 (no) FremgangsmÕte og innretning for tilveiebringelse av lekkasjepr°vede perforeringskanoner
NO20021082D0 (no) Anordning for og en fremgangsmåte ved forankring av en ekspanderbar rörledning
NO971634L (no) Fremgangsmåte og apparat for måling av formasjonstrykk
NO20012132D0 (no) Fremgangsmåte og anordning for fjernstyring av rör- utlöpshylse
NO960330D0 (no) Fremgangsmåte og anordning for undersökelse av gassförende rörledning
AU2468699A (en) Apparatus and method for inspection of pipes and tubes using guided wave probe
NO20013583D0 (no) Et apparat og en fremgangsmåte for å lette sammenkoblingen av rör
NO983601D0 (no) Fremgangsmåte og anordning for fjernmåling av tetthet
NO993559L (no) Apparat og fremgangsmÕte for sveising og inspisering av viklede rör
NO953948D0 (no) Fremgangsmåte og apparat for måling av boretilstander
NO983549L (no) FremgangsmÕte og apparat til mÕling av tykkelse av flerlagstrukturer
DK0797042T3 (da) Apparat og fremgangsmåde til foring af et undersøisk rør
NO991643L (no) Apparat og fremgangsmÕte for setting av r°r
NO308561B1 (no) Apparat og fremgangsmÕte for inspeksjon av rør og rørledninger
NO983282L (no) Anordning og fremgangsmÕte for trykkmÕling

Legal Events

Date Code Title Description
MK1K Patent expired