[go: up one dir, main page]

NO20016222L - Avskjermingsmetode og apparat som benytter tverrslisser - Google Patents

Avskjermingsmetode og apparat som benytter tverrslisser

Info

Publication number
NO20016222L
NO20016222L NO20016222A NO20016222A NO20016222L NO 20016222 L NO20016222 L NO 20016222L NO 20016222 A NO20016222 A NO 20016222A NO 20016222 A NO20016222 A NO 20016222A NO 20016222 L NO20016222 L NO 20016222L
Authority
NO
Norway
Prior art keywords
transverse slots
shielding method
shielding
slots
transverse
Prior art date
Application number
NO20016222A
Other languages
English (en)
Other versions
NO337553B1 (no
NO20016222D0 (no
Inventor
Jean Seydoux
Richard A Rosthal
Dzevat Omeragic
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 NO20016222D0 publication Critical patent/NO20016222D0/no
Publication of NO20016222L publication Critical patent/NO20016222L/no
Publication of NO337553B1 publication Critical patent/NO337553B1/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
    • G01V3/28—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/30—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electromagnetic waves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Joints Allowing Movement (AREA)
  • Connection Of Plates (AREA)
  • Details Of Indoor Wiring (AREA)
NO20016222A 2000-12-22 2001-12-19 Avskjermingsmetode og apparat som benytter tverrslisser NO337553B1 (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/746,927 US6566881B2 (en) 1999-12-01 2000-12-22 Shielding method and apparatus using transverse slots

Publications (3)

Publication Number Publication Date
NO20016222D0 NO20016222D0 (no) 2001-12-19
NO20016222L true NO20016222L (no) 2002-06-24
NO337553B1 NO337553B1 (no) 2016-05-09

Family

ID=25002939

Family Applications (2)

Application Number Title Priority Date Filing Date
NO20016222A NO337553B1 (no) 2000-12-22 2001-12-19 Avskjermingsmetode og apparat som benytter tverrslisser
NO20151259A NO339607B1 (no) 2000-12-22 2015-09-25 Fremgangsmåte for skjerming, samt apparat som benytter en bøyelig strimmel

Family Applications After (1)

Application Number Title Priority Date Filing Date
NO20151259A NO339607B1 (no) 2000-12-22 2015-09-25 Fremgangsmåte for skjerming, samt apparat som benytter en bøyelig strimmel

Country Status (8)

Country Link
US (2) US6566881B2 (no)
AU (1) AU766363B2 (no)
BR (1) BRPI0105757B1 (no)
CA (1) CA2363534C (no)
CO (1) CO5290323A1 (no)
GB (1) GB2374936B (no)
NO (2) NO337553B1 (no)
RU (1) RU2219569C2 (no)

Families Citing this family (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7659722B2 (en) 1999-01-28 2010-02-09 Halliburton Energy Services, Inc. Method for azimuthal resistivity measurement and bed boundary detection
US6163155A (en) * 1999-01-28 2000-12-19 Dresser Industries, Inc. Electromagnetic wave resistivity tool having a tilted antenna for determining the horizontal and vertical resistivities and relative dip angle in anisotropic earth formations
US6614229B1 (en) 2000-03-27 2003-09-02 Schlumberger Technology Corporation System and method for monitoring a reservoir and placing a borehole using a modified tubular
US6727705B2 (en) 2000-03-27 2004-04-27 Schlumberger Technology Corporation Subsurface monitoring and borehole placement using a modified tubular equipped with tilted or transverse magnetic dipoles
US7059428B2 (en) 2000-03-27 2006-06-13 Schlumberger Technology Corporation Monitoring a reservoir in casing drilling operations using a modified tubular
US6836218B2 (en) * 2000-05-22 2004-12-28 Schlumberger Technology Corporation Modified tubular equipped with a tilted or transverse magnetic dipole for downhole logging
US6577244B1 (en) * 2000-05-22 2003-06-10 Schlumberger Technology Corporation Method and apparatus for downhole signal communication and measurement through a metal tubular
US6995684B2 (en) * 2000-05-22 2006-02-07 Schlumberger Technology Corporation Retrievable subsurface nuclear logging system
EP1182702B1 (de) * 2000-08-21 2007-01-03 Infineon Technologies AG Vorrichtung zum Schutz einer integrierten Schaltung
CN1278135C (zh) * 2001-08-03 2006-10-04 贝克休斯公司 一种钻孔同时监测工具及测量方法
US6998844B2 (en) * 2002-04-19 2006-02-14 Schlumberger Technology Corporation Propagation based electromagnetic measurement of anisotropy using transverse or tilted magnetic dipoles
US7382135B2 (en) * 2003-05-22 2008-06-03 Schlumberger Technology Corporation Directional electromagnetic wave resistivity apparatus and method
US7202670B2 (en) * 2003-08-08 2007-04-10 Schlumberger Technology Corporation Method for characterizing a subsurface formation with a logging instrument disposed in a borehole penetrating the formation
US7138897B2 (en) 2003-10-15 2006-11-21 Schlumberger Technology Corporation Induction measurements with reduced borehole effects
US20050083061A1 (en) * 2003-10-17 2005-04-21 Tabanou Jacques R. Methods and systems for estimating formation resistivity that are less sensitive to skin effects, shoulder-bed effects and formation dips
US7091877B2 (en) * 2003-10-27 2006-08-15 Schlumberger Technology Corporation Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasion
US7514930B2 (en) * 2003-12-02 2009-04-07 Schlumberger Technology Corporation Apparatus and method for addressing borehole eccentricity effects
US7027923B2 (en) * 2003-12-12 2006-04-11 Schlumberger Technology Corporation Method for determining sonde error for an induction or propagation tool with transverse or triaxial arrays
US7386430B2 (en) * 2004-03-19 2008-06-10 Schlumberger Technology Corporation Method of correcting triaxial induction arrays for borehole effect
US7239145B2 (en) * 2004-03-29 2007-07-03 Schlumberger Technology Center Subsurface electromagnetic measurements using cross-magnetic dipoles
US7525315B2 (en) * 2004-04-01 2009-04-28 Schlumberger Technology Corporation Resistivity logging tool and method for building the resistivity logging tool
US7719282B2 (en) * 2004-04-14 2010-05-18 Baker Hughes Incorporated Method and apparatus for mulit-component induction instrument measuring system for geosteering and formation resistivity data interpretation in horizontal, vertical and deviated wells
US8030935B2 (en) * 2004-10-15 2011-10-04 Halliburton Energy Services, Inc. Minimizing the effect of borehole current in tensor induction logging tools
US7323996B2 (en) * 2005-08-02 2008-01-29 International Business Machines Corporation RFID reader having antenna with directional attenuation panels for determining RFID tag location
CA2617494A1 (en) * 2005-08-03 2007-02-15 Shell Canada Limited Method and system for determining an electromagnetic response from an earth formation and method of drilling a borehole and method of producing a hydrocarbon fluid
MX2009000112A (es) 2006-07-11 2009-01-26 Halliburton Energy Serv Inc Conjunto de herramienta de geodireccion modular.
BRPI0713267B1 (pt) * 2006-07-12 2018-06-19 Halliburton Energy Services, Inc. “método para construir uma antena inclinada sobre um segmento recuperável de uma ferramenta de registro durante perfuração, ferramenta de registro durante perfuração, e, ferramenta de furo abaixo recuperável”
US8593147B2 (en) 2006-08-08 2013-11-26 Halliburton Energy Services, Inc. Resistivity logging with reduced dip artifacts
US8274289B2 (en) * 2006-12-15 2012-09-25 Halliburton Energy Services, Inc. Antenna coupling component measurement tool having rotating antenna configuration
GB2459067B (en) * 2007-03-16 2011-11-30 Halliburton Energy Serv Inc Robust inversion systems and methods for azimuthally sensitive resistivity logging tools
US7759940B2 (en) * 2007-04-04 2010-07-20 Baker Hughes Incorporated Mutual shielding of collocated induction coils in multi-component induction logging instruments
MX2009011975A (es) 2007-05-08 2010-01-28 Schlumberger Technology Bv Determinacion de propiedaes de formacion corregidas para tomar en cuenta los efectos de pozo.
WO2009006465A2 (en) * 2007-07-03 2009-01-08 Shell Oil Company System and method for measuring a time-varying magnetic field and method for production of a hydrocarbon fluid
US8129993B2 (en) * 2007-07-10 2012-03-06 Schlumberger Technology Corporation Determining formation parameters using electromagnetic coupling components
US7723989B2 (en) * 2007-08-31 2010-05-25 Schlumberger Technology Corporation Transducer assemblies for subsurface use
US7839149B2 (en) * 2008-01-11 2010-11-23 Baker Hughes Incorporated Multi-component resistivity logging tool with multiple antennas using common antenna grooves
US9732559B2 (en) 2008-01-18 2017-08-15 Halliburton Energy Services, Inc. EM-guided drilling relative to an existing borehole
CN102439260A (zh) 2008-12-16 2012-05-02 哈利伯顿能源服务公司 方位近钻头电阻率和地质导向方法及系统
US8786287B2 (en) * 2009-03-04 2014-07-22 Baker Hughes Incorporated Collocated tri-axial induction sensors with segmented horizontal coils
US8089268B2 (en) * 2009-03-24 2012-01-03 Smith International, Inc. Apparatus and method for removing anisotropy effect from directional resistivity measurements
US8207738B2 (en) * 2009-03-24 2012-06-26 Smith International Inc. Non-planar antennae for directional resistivity logging
US8368403B2 (en) 2009-05-04 2013-02-05 Schlumberger Technology Corporation Logging tool having shielded triaxial antennas
US9134449B2 (en) * 2009-05-04 2015-09-15 Schlumberger Technology Corporation Directional resistivity measurement for well placement and formation evaluation
US7990153B2 (en) * 2009-05-11 2011-08-02 Smith International, Inc. Compensated directional resistivity measurements
US8159227B2 (en) * 2009-05-11 2012-04-17 Smith International Inc. Methods for making directional resistivity measurements
US8614578B2 (en) * 2009-06-18 2013-12-24 Schlumberger Technology Corporation Attenuation of electromagnetic signals passing through conductive material
US8497673B2 (en) * 2009-09-28 2013-07-30 Schlumberger Technology Corporation Directional resistivity antenna shield
US8466682B2 (en) * 2009-09-29 2013-06-18 Schlumberger Technology Corporation Apparatus and method for downhole electromagnetic measurement while drilling
US9085959B2 (en) 2010-01-22 2015-07-21 Halliburton Energy Services, Inc. Method and apparatus for resistivity measurements
BR112012027692A2 (pt) 2010-04-29 2016-08-16 Prad Res & Dev Ltd método para obter medições corrigidas por ganho, aparelho para determinar uma propriedade de formação de uma formação subterrânea, blindagem para uma ferramenta de perfilagem dentro de poço, e método para obter uma matriz de impedância utilizando uma ferramenta dentro do poço substancialmente não rotativa
US8536871B2 (en) 2010-11-02 2013-09-17 Schlumberger Technology Corporation Method of correcting resistivity measurements for toll bending effects
US8626446B2 (en) 2011-04-01 2014-01-07 Schlumberger Technology Corporation Method of directional resistivity logging
US20120325359A1 (en) * 2011-06-27 2012-12-27 3M Innovative Properties Company Flexible magnetic core electronic marker
WO2013003516A2 (en) * 2011-06-28 2013-01-03 Schlumberger Canada Limited Modified triaxial antenna array
DK2772001T3 (da) * 2011-10-28 2021-02-01 Univ Danmarks Tekniske Dynamisk krypteringsfremgangsmåde
US9540922B2 (en) 2012-03-29 2017-01-10 Schlumberger Technology Corporation Electromagnetic method for obtaining dip azimuth angle
AU2012383577B2 (en) 2012-06-25 2015-07-09 Halliburton Energy Services, Inc. Tilted antenna logging systems and methods yielding robust measurement signals
CN102866428A (zh) * 2012-09-12 2013-01-09 中国海洋石油总公司 用于测井仪器的横向线圈及其形成方法
MX351130B (es) * 2012-12-31 2017-10-03 Halliburton Energy Services Inc Imagenología de formaciones con antenas multipolares.
BR112015013271A2 (pt) 2012-12-31 2017-07-11 Halliburton Energy Services Inc sistema azimutal profundo com sensores de múltiplos polos
US9389332B2 (en) 2013-04-01 2016-07-12 Oliden Technology, Llc Method and tool for directional electromagnetic well logging
CA2911013A1 (en) * 2013-05-31 2014-12-04 Halliburton Energy Services, Inc. Method and apparatus for generating seismic pulses to map subterranean fractures
US9048127B2 (en) 2013-09-25 2015-06-02 Taiwan Semiconductor Manufacturing Co., Ltd. Three dimensional circuit including shielded inductor and method of forming same
WO2015050867A1 (en) * 2013-10-03 2015-04-09 Halliburton Energy Services, Inc. Compensated borehole and pipe survey tool with conformable sensors
US20150268372A1 (en) * 2014-03-20 2015-09-24 Schlumberger Technology Corporation Method and apparatus for determining formation properties using collocated triaxial antennas with non-planar sinusoidal coils
US9506342B2 (en) * 2014-06-06 2016-11-29 Baker Hughes Incorporated Downhole communications arrangement and downhole system
CN104407386B (zh) * 2014-12-05 2017-03-08 中国石油天然气集团公司 一种电磁勘探数据采集和处理方法及系统
CA2995209C (en) * 2015-10-12 2021-07-13 Halliburton Energy Services, Inc. Electromagnetically transmissive directional antenna shield
AU2017392499A1 (en) 2017-01-10 2019-06-20 Halliburton Energy Services, Inc. Stacked soft magnetic inserts and slotted shield designs for tilted coil antennas
AU2017392500A1 (en) 2017-01-10 2019-06-20 Halliburton Energy Services, Inc. Stacked soft magnetic inserts and slotted shield designs for tilted coil antennas
US10690799B2 (en) * 2017-12-22 2020-06-23 Halliburton Energy Services, Inc. Antenna shield design for optimized EM wave propagation in resistivity logging tools
US11125902B2 (en) 2018-09-14 2021-09-21 Halliburton Energy Services, Inc. Antenna shields for co-located antennas
NO347707B1 (en) 2018-09-14 2024-02-26 Halliburton Energy Services Inc Cross-slot bobbin and antenna shield for co-located antennas
US11339650B2 (en) 2019-03-22 2022-05-24 Halliburton Energy Services, Inc. Compact logging while drilling look around and look ahead tool
CN110098489B (zh) * 2019-05-16 2021-07-20 哈尔滨工业大学 一种基于四纳米柱耦合振子的可调超窄带吸收体
CN112065362B (zh) * 2020-09-24 2023-03-31 东北石油大学 一种抗干扰式自然电位测井装置及方法
CN115726773B (zh) * 2021-08-30 2024-11-22 中国石油化工股份有限公司 一种测量随钻前探地层电阻率的装置及方法
US11953639B2 (en) * 2022-03-17 2024-04-09 Halliburton Energy Services, Inc. Cross-component response interpolation for coaxially oriented antennas in an electromagnetic tool

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944910A (en) 1973-08-23 1976-03-16 Schlumberger Technology Corporation Method and apparatus utilizing microwave electromagnetic energy for investigating earth formations
US4319191A (en) 1980-01-10 1982-03-09 Texaco Inc. Dielectric well logging with radially oriented coils
US4536714A (en) 1982-04-16 1985-08-20 Schlumberger Technology Corporation Shields for antennas of borehole logging devices
US4808929A (en) 1983-11-14 1989-02-28 Schlumberger Technology Corporation Shielded induction sensor for well logging
US4689572A (en) * 1984-12-28 1987-08-25 Schlumberger Technology Corp. Electromagnetic logging apparatus with slot antennas
US4873488A (en) 1985-04-03 1989-10-10 Schlumberger Technology Corporation Induction logging sonde with metallic support having a coaxial insulating sleeve member
US4704581A (en) 1985-12-28 1987-11-03 Schlumberger Technology Corp. Electromagnetic logging apparatus using vertical magnetic dipole slot antennas
FR2600171B1 (fr) * 1986-06-17 1990-10-19 Geoservices Antenne pour emetteur situe a grande profondeur
US4857852A (en) * 1986-06-20 1989-08-15 Schlumberger Technology Corp. Induction well logging apparatus with transformer coupled phase sensitive detector
US4949045A (en) 1987-10-30 1990-08-14 Schlumberger Technology Corporation Well logging apparatus having a cylindrical housing with antennas formed in recesses and covered with a waterproof rubber layer
US5115198A (en) 1989-09-14 1992-05-19 Halliburton Logging Services, Inc. Pulsed electromagnetic dipmeter method and apparatus employing coils with finite spacing
JP2534193B2 (ja) 1993-05-31 1996-09-11 石油資源開発株式会社 指向性インダクション検層法および装置
US5757191A (en) 1994-12-09 1998-05-26 Halliburton Energy Services, Inc. Virtual induction sonde for steering transmitted and received signals
US5631563A (en) 1994-12-20 1997-05-20 Schlumbreger Technology Corporation Resistivity antenna shield, wear band and stabilizer assembly for measuring-while-drilling tool
US5767674A (en) 1996-04-17 1998-06-16 Griffin; Douglas D. Apparatus for protecting a magnetic resonance antenna
NZ333980A (en) 1996-07-01 2000-03-27 Shell Int Research Determining an electric conductivity of an earth formation formed of different earth layers penetrated by a wellbore
US6044325A (en) 1998-03-17 2000-03-28 Western Atlas International, Inc. Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrument
US6191586B1 (en) 1998-06-10 2001-02-20 Dresser Industries, Inc. Method and apparatus for azimuthal electromagnetic well logging using shielded antennas
US6297639B1 (en) 1999-12-01 2001-10-02 Schlumberger Technology Corporation Method and apparatus for directional well logging with a shield having sloped slots
US6614229B1 (en) * 2000-03-27 2003-09-02 Schlumberger Technology Corporation System and method for monitoring a reservoir and placing a borehole using a modified tubular
US6788065B1 (en) * 2000-10-12 2004-09-07 Schlumberger Technology Corporation Slotted tubulars for subsurface monitoring in directed orientations

Also Published As

Publication number Publication date
US20010004212A1 (en) 2001-06-21
GB2374936A (en) 2002-10-30
US6566881B2 (en) 2003-05-20
US20030155923A1 (en) 2003-08-21
NO337553B1 (no) 2016-05-09
AU9135001A (en) 2002-06-27
BRPI0105757B1 (pt) 2015-03-17
CA2363534C (en) 2004-01-06
BR0105757A (pt) 2002-10-08
NO20016222D0 (no) 2001-12-19
NO339607B1 (no) 2017-01-09
US6630830B2 (en) 2003-10-07
NO20151259L (no) 2002-06-24
GB2374936B (en) 2003-09-17
GB0127993D0 (en) 2002-01-16
CA2363534A1 (en) 2002-06-22
RU2219569C2 (ru) 2003-12-20
CO5290323A1 (es) 2003-06-27
AU766363B2 (en) 2003-10-16

Similar Documents

Publication Publication Date Title
NO20016222L (no) Avskjermingsmetode og apparat som benytter tverrslisser
NO20023631D0 (no) Apparat og fremgangsmåte for brönnboring
NO20030863D0 (no) Metode og apparat for brönnsementering
NO20024946D0 (no) Apparat og metode for utforming av en sidebrönn
NO20012472L (no) Apparat og fremgangsmåte for brönnforvaltning
NO20004439L (no) Fremgangsmåte og anordning for brönntesting
NO20020834D0 (no) Fremgangsmåte og apparat for kommunikasjon i en brönn
DK2835930T3 (da) OFDM-kommunikationsfremgangsmåder og apparat
NO20030668L (no) Apparat og fremgangsmåte for telemetri
NO20030403D0 (no) Metode og apparat for dannelse av lateral brönn
NO20012821D0 (no) Fremgangsmåte og anordning for kommunikasjon
NO20012731D0 (no) Höyeffekts brönnloggemetode og apparat
NO20012151D0 (no) Fremgangsmåte og anordning for kommunikasjon
NO20002584L (no) Brønnreferanseapparat og fremgangsmÕte
NO20014717D0 (no) Apparat og fremgangsmåte for akustisk logging
NO20023617D0 (no) Fremgangsmåte og apparat for datakomprimering
NO20005140L (no) Fremgangsmåte og apparat for datakommunikasjon
NO20024551D0 (no) Apparat og fremgangsmåte for elektrofysiologisk testing
NO20030023D0 (no) Apparat og fremgangsmåte for fluidseparasjon
NO20014706D0 (no) Apparat og fremgangsmåte for hjertekirurgi
NO20013344D0 (no) Fremgangsmåte og apparat for vannbehandling
NO20006228L (no) Fremgangsmåte og apparat for seismiske opptak
NO20021631D0 (no) Metode og apparat for taledata
NO995567D0 (no) Fremgangsmåte og apparat for samvirkning
NO20000928D0 (no) Fremgangsmåte og anordning for sammenføyning

Legal Events

Date Code Title Description
MK1K Patent expired