NO301663B1 - Sonisk brönnsonde - Google Patents

Sonisk brönnsonde Download PDF

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Publication number
NO301663B1
NO301663B1 NO901235A NO901235A NO301663B1 NO 301663 B1 NO301663 B1 NO 301663B1 NO 901235 A NO901235 A NO 901235A NO 901235 A NO901235 A NO 901235A NO 301663 B1 NO301663 B1 NO 301663B1
Authority
NO
Norway
Prior art keywords
sonic
waves
transmitter
probe
monopole
Prior art date
Application number
NO901235A
Other languages
English (en)
Norwegian (no)
Other versions
NO901235L (no
NO901235D0 (no
Inventor
David Hoyle
Albert Wignall
Jeffrey Aron
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 NO901235D0 publication Critical patent/NO901235D0/no
Publication of NO901235L publication Critical patent/NO901235L/no
Publication of NO301663B1 publication Critical patent/NO301663B1/no

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
    • G01V1/52—Structural details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
    • G01V1/52—Structural details
    • G01V1/523—Damping devices
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/911—Particular well-logging apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Surgical Instruments (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Small-Scale Networks (AREA)
  • Transceivers (AREA)
  • Food-Manufacturing Devices (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
NO901235A 1989-03-17 1990-03-16 Sonisk brönnsonde NO301663B1 (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/325,405 US5036945A (en) 1989-03-17 1989-03-17 Sonic well tool transmitter receiver array including an attenuation and delay apparatus

Publications (3)

Publication Number Publication Date
NO901235D0 NO901235D0 (no) 1990-03-16
NO901235L NO901235L (no) 1990-09-18
NO301663B1 true NO301663B1 (no) 1997-11-24

Family

ID=23267758

Family Applications (1)

Application Number Title Priority Date Filing Date
NO901235A NO301663B1 (no) 1989-03-17 1990-03-16 Sonisk brönnsonde

Country Status (16)

Country Link
US (2) US5036945A (ja)
EP (1) EP0388316B1 (ja)
JP (1) JPH0681877B2 (ja)
AT (1) ATE120556T1 (ja)
AU (1) AU617043B2 (ja)
BR (1) BR9001263A (ja)
DE (1) DE69018114D1 (ja)
DK (1) DK0388316T3 (ja)
IE (1) IE67788B1 (ja)
MA (1) MA21772A1 (ja)
MX (1) MX171789B (ja)
MY (1) MY105539A (ja)
NO (1) NO301663B1 (ja)
OA (1) OA09188A (ja)
TN (1) TNSN90031A1 (ja)
ZA (1) ZA902049B (ja)

Families Citing this family (83)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2668836B1 (fr) * 1990-11-06 1993-04-30 Schlumberger Services Petrol Transducteur acoustique de puits.
US5289433A (en) * 1992-10-13 1994-02-22 Shell Oil Company Acoustic multi-mode wide-band logging device
US5343001A (en) * 1992-10-13 1994-08-30 Shell Oil Company Acoustic multi-mode logging device adapted to decouple noise within a semi-rigid receiver array
US5357481A (en) * 1992-11-04 1994-10-18 Western Atlas International, Inc. Borehole logging tool
US5387767A (en) * 1993-12-23 1995-02-07 Schlumberger Technology Corporation Transmitter for sonic logging-while-drilling
US6088294A (en) * 1995-01-12 2000-07-11 Baker Hughes Incorporated Drilling system with an acoustic measurement-while-driving system for determining parameters of interest and controlling the drilling direction
GB2311859B (en) * 1995-01-12 1999-03-03 Baker Hughes Inc A measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers
US6614360B1 (en) 1995-01-12 2003-09-02 Baker Hughes Incorporated Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers
US5510582A (en) * 1995-03-06 1996-04-23 Halliburton Company Acoustic attenuator, well logging apparatus and method of well logging
GB2300048B (en) * 1995-04-19 1999-08-11 Halliburton Co Acoustic noise cancelling apparatus for well logging and method of well logging
US5691712A (en) * 1995-07-25 1997-11-25 Schlumberger Technology Corporation Multiple wellbore tool apparatus including a plurality of microprocessor implemented wellbore tools for operating a corresponding plurality of included wellbore tools and acoustic transducers in response to stimulus signals and acoustic signals
US5646379A (en) * 1995-09-13 1997-07-08 Schlumberger Technology Corporation Attentuator for borehole acoustic waves
US5852262A (en) * 1995-09-28 1998-12-22 Magnetic Pulse, Inc. Acoustic formation logging tool with improved transmitter
US5687138A (en) * 1995-10-03 1997-11-11 Schlumberger Technology Corporation Methods of analyzing stoneley waveforms and characterizing underground formations
US5753812A (en) * 1995-12-07 1998-05-19 Schlumberger Technology Corporation Transducer for sonic logging-while-drilling
GB9621236D0 (en) * 1996-10-11 1996-11-27 Schlumberger Ltd Apparatus and method for borehole seismic exploration
US5731550A (en) * 1997-03-07 1998-03-24 Western Atlas International, Inc. Acoustic dipole well logging instrument
GB2327957A (en) 1997-08-09 1999-02-10 Anadrill Int Sa Method and apparatus for suppressing drillstring vibrations
US5987385A (en) * 1997-08-29 1999-11-16 Dresser Industries, Inc. Method and apparatus for creating an image of an earth borehole or a well casing
US5886303A (en) * 1997-10-20 1999-03-23 Dresser Industries, Inc. Method and apparatus for cancellation of unwanted signals in MWD acoustic tools
US5894451A (en) * 1997-10-21 1999-04-13 The United States Of America As Represented By The Secretary Of The Navy Impulsive snap-through acoustic pulse generator
US5869755A (en) * 1997-12-31 1999-02-09 Schlumberger Technology Corporation Porosity estimation method in carbonate rock
AU6931598A (en) * 1998-04-28 1999-11-16 Schlumberger Technology B.V. Acoustic logging tool
US6366531B1 (en) 1998-09-22 2002-04-02 Dresser Industries, Inc. Method and apparatus for acoustic logging
US6564899B1 (en) * 1998-09-24 2003-05-20 Dresser Industries, Inc. Method and apparatus for absorbing acoustic energy
US6213250B1 (en) 1998-09-25 2001-04-10 Dresser Industries, Inc. Transducer for acoustic logging
US6429784B1 (en) 1999-02-19 2002-08-06 Dresser Industries, Inc. Casing mounted sensors, actuators and generators
US6915875B2 (en) * 1999-06-03 2005-07-12 Baker Hughes Incorporated Acoustic isolator for downhole applications
US7028806B2 (en) * 1999-06-03 2006-04-18 Baker Hughes Incorporated Acoustic isolator for downhole applications
US6615949B1 (en) * 1999-06-03 2003-09-09 Baker Hughes Incorporated Acoustic isolator for downhole applications
US6102152A (en) * 1999-06-18 2000-08-15 Halliburton Energy Services, Inc. Dipole/monopole acoustic transmitter, methods for making and using same in down hole tools
US6474439B1 (en) * 2000-03-29 2002-11-05 Schlumberger Technology Corporation Dipole logging tool
US7336562B1 (en) * 2000-11-16 2008-02-26 Schlumberger Technology Corporation Sonic logging tool including receiver and spacer structure
US6550342B2 (en) 2000-11-29 2003-04-22 Weatherford/Lamb, Inc. Circumferential strain attenuator
US6643221B1 (en) 2001-11-06 2003-11-04 Schlumberger Technology Corporation Structures and methods for damping tool waves particularly for acoustic logging tools
US6834743B2 (en) 2001-12-07 2004-12-28 Haliburton Energy Services, Inc. Wideband isolator for acoustic tools
US6782970B2 (en) 2002-04-25 2004-08-31 Schlumberger Technology Corporation Acoustic source using a shaftless electrical hammer
AU2003249634A1 (en) * 2002-06-21 2004-01-06 Schlumberger Holdings Limited Method and apparatus for downhole pipe or casing repair
US6671224B1 (en) 2002-08-26 2003-12-30 Schlumberger Technology Corporation Active reduction of tool borne noise in a sonic logging tool
US6868036B2 (en) 2002-11-08 2005-03-15 Schlumberger Technology Corporation Oil well acoustic logging tool with baffles forming an acoustic waveguide
US7195069B2 (en) * 2003-06-26 2007-03-27 Weatherford/Lamb, Inc. Method and apparatus for backing off a tubular member from a wellbore
US7036363B2 (en) * 2003-07-03 2006-05-02 Pathfinder Energy Services, Inc. Acoustic sensor for downhole measurement tool
US7513147B2 (en) * 2003-07-03 2009-04-07 Pathfinder Energy Services, Inc. Piezocomposite transducer for a downhole measurement tool
US7075215B2 (en) * 2003-07-03 2006-07-11 Pathfinder Energy Services, Inc. Matching layer assembly for a downhole acoustic sensor
US6995500B2 (en) * 2003-07-03 2006-02-07 Pathfinder Energy Services, Inc. Composite backing layer for a downhole acoustic sensor
US20050030036A1 (en) * 2003-08-06 2005-02-10 Baker Hughes Incorporated Side entry leak protection for sondes
US7207397B2 (en) * 2003-09-30 2007-04-24 Schlumberger Technology Corporation Multi-pole transmitter source
US7367392B2 (en) * 2004-01-08 2008-05-06 Schlumberger Technology Corporation Wellbore apparatus with sliding shields
US7460435B2 (en) * 2004-01-08 2008-12-02 Schlumberger Technology Corporation Acoustic transducers for tubulars
US7364007B2 (en) * 2004-01-08 2008-04-29 Schlumberger Technology Corporation Integrated acoustic transducer assembly
US7216737B2 (en) * 2004-02-03 2007-05-15 Schlumberger Technology Corporation Acoustic isolator between downhole transmitters and receivers
US7334661B2 (en) * 2004-02-05 2008-02-26 Schlumberger Technology Corporation Acoustic logging tool sleeve
US20050194201A1 (en) * 2004-03-03 2005-09-08 Tenghamn Stig R.L. Particle motion sensor for marine seismic sensor streamers
US7926614B2 (en) * 2004-03-03 2011-04-19 Pgs Americas, Inc. Particle motion sensor mounting for marine seismic sensor streamers
US6957572B1 (en) 2004-06-21 2005-10-25 Schlumberger Technology Corporation Apparatus and methods for measuring mud slowness in a borehole
US7086286B1 (en) * 2005-06-09 2006-08-08 General Electric Company Transducer holder and nozzle
US7591343B2 (en) * 2005-08-26 2009-09-22 Halliburton Energy Services, Inc. Apparatuses for generating acoustic waves
US7372777B2 (en) * 2005-09-23 2008-05-13 Probe Technology Services, Inc. Sonic instrumentation apparatus and method for cement bond logging
US7414918B2 (en) * 2005-09-23 2008-08-19 Probe Technology Services, Inc. Method for normalizing signals in a cement bond logging tool
US7411864B2 (en) * 2005-09-23 2008-08-12 Probe Technology Services, Inc. Method for processing signals in a cement bong logging tool
US7471591B2 (en) * 2005-12-21 2008-12-30 Precision Energy Services, Inc. Method and apparatus for azimuthal logging of shear waves in boreholes using optionally rotatable transmitter and receiver assemblies
US7623412B2 (en) * 2006-03-07 2009-11-24 Schlumberger Technology Corporation Anisotropy measurement while drilling
US7382684B2 (en) 2006-06-13 2008-06-03 Seispec, L.L.C. Method for selective bandlimited data acquisition in subsurface formations
US8467266B2 (en) 2006-06-13 2013-06-18 Seispec, L.L.C. Exploring a subsurface region that contains a target sector of interest
GB2444077B (en) * 2006-11-23 2011-07-27 Reeves Wireline Tech Ltd Acoustic isolator section
US7587936B2 (en) * 2007-02-01 2009-09-15 Smith International Inc. Apparatus and method for determining drilling fluid acoustic properties
US7909094B2 (en) 2007-07-06 2011-03-22 Halliburton Energy Services, Inc. Oscillating fluid flow in a wellbore
US8279713B2 (en) * 2007-07-20 2012-10-02 Precision Energy Services, Inc. Acoustic transmitter comprising a plurality of piezoelectric plates
US7864629B2 (en) * 2007-11-20 2011-01-04 Precision Energy Services, Inc. Monopole acoustic transmitter comprising a plurality of piezoelectric discs
US20100020638A1 (en) * 2008-07-24 2010-01-28 Precision Energy Services, Inc. Monopole acoustic transmitter ring comprising piezoelectric material
US8347505B2 (en) * 2008-10-13 2013-01-08 Baker Hughes Incorporated Method for fabricating a cylindrical spring by compressive force
JP4724792B2 (ja) * 2008-10-16 2011-07-13 千栄 太田 落とし蓋
US8117907B2 (en) * 2008-12-19 2012-02-21 Pathfinder Energy Services, Inc. Caliper logging using circumferentially spaced and/or angled transducer elements
WO2011051776A2 (en) 2009-10-26 2011-05-05 Schlumberger Technology B.V. Apparatus for logging while drilling accoustic measurment
WO2013172837A1 (en) 2012-05-17 2013-11-21 Halliburton Energy Services, Inc. Variable stiffness downhole tool housing
US20140169129A1 (en) * 2012-12-18 2014-06-19 Schlumberger Technology Corporation Downhole Receiver Systems and Methods for Low Frequency Seismic Investigations
AU2013270498A1 (en) * 2012-12-21 2014-07-10 Cgg Services Sa Volumetric and non-volumetric sources-based seismic survey and method
WO2016064421A1 (en) * 2014-10-24 2016-04-28 Halliburton Energy Services, Inc. Acoustic dipole piston transmitter
US10001574B2 (en) 2015-02-24 2018-06-19 Amphenol (Maryland), Inc. Hermetically sealed hydrophones with very low acceleration sensitivity
RU2609440C1 (ru) * 2015-10-07 2017-02-01 Общество с Ограниченной Ответственностью "ТНГ-Групп" Изолятор автономного прибора акустического каротажа
GB2604059B (en) * 2019-12-04 2024-04-03 Halliburton Energy Services Inc Bi-directional acoustic telemetry system
US11512586B2 (en) 2020-10-06 2022-11-29 Halliburton Energy Services, Inc. Logging while drilling tool
US20230213677A1 (en) * 2022-01-03 2023-07-06 Halliburton Energy Services, Inc. Through tubing cement evaluation based on rotatable transmitter and computational rotated responses

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277436A (en) * 1956-02-09 1966-10-04 James W Fitzgerald Hollow electro-acoustic transducer
US3191141A (en) * 1961-05-16 1965-06-22 Schlumberger Well Surv Corp Logging tool housing with acoustic delay
US3161256A (en) * 1961-05-16 1964-12-15 Schiumberger Well Surveying Co Acoustic logging tools
US3213415A (en) * 1962-08-27 1965-10-19 Schlumberger Well Surv Corp Pressure equalizing arrangement for acoustic logging
US3332057A (en) * 1965-01-28 1967-07-18 Sonic Engineering Company Single cardioid wave detector for seismic signals
US3364463A (en) * 1966-07-01 1968-01-16 Schlumberger Technology Corp Well logging tool
US3381267A (en) * 1966-07-26 1968-04-30 Schlumberger Technology Corp Well logging tool
US3504757A (en) * 1968-11-20 1970-04-07 Schlumberger Technology Corp Acoustic well-logging apparatus
US3583677A (en) * 1969-08-28 1971-06-08 Electro Sonic Oil Tools Inc Electro-mechanical transducer for secondary oil recovery
US4020452A (en) * 1971-05-24 1977-04-26 Schlumberger Technology Corporation Apparatus for use in investigating earth formations
US3978939A (en) * 1971-05-24 1976-09-07 Schlumberger Technology Corporation Acoustic well logging methods and apparatus
JPS54107401A (en) * 1978-02-09 1979-08-23 Nagarou Kozaki Vibrating method for s wave detecting layer
US4312052A (en) * 1980-04-21 1982-01-19 Shell Oil Company Method for identifying weak sands
US4383308A (en) * 1980-12-29 1983-05-10 Mobil Oil Corporation Acoustic well logging device for detecting shear and compressional waves
MA19839A1 (fr) * 1982-07-06 1984-04-01 Exxon Production Research Co Appareil et procede de diagraphie acoustique et procede de reduction du bruit du aux ondes de compression et de stoneley .
DE3309068A1 (de) * 1983-03-14 1984-09-20 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Piezoelektrischer schwingungserreger
US4516228A (en) * 1983-08-25 1985-05-07 Mobil Oil Corporation Acoustic well logging device for detecting compressional and shear waves
US4682308A (en) * 1984-05-04 1987-07-21 Exxon Production Research Company Rod-type multipole source for acoustic well logging
US4685091A (en) * 1984-05-10 1987-08-04 Exxon Production Research Co. Method and apparatus for acoustic well logging
US4803666A (en) * 1984-07-20 1989-02-07 Standard Oil Company (Indiana), Now Amoco Corp. Multisource multireceiver method and system for geophysical exploration
US4817061A (en) * 1984-07-20 1989-03-28 Amoco Corporation Seismic surveying technique for the detection of azimuthal variations in the earth's subsurface
US4903244A (en) * 1984-07-20 1990-02-20 Standard Oil Company (Now Amoco Corporation) Multisource multireceiver method and system for geophysical exploration
US4704708A (en) * 1985-10-04 1987-11-03 Mobil Oil Corporation Acoustic borehole logging tool
GB8528821D0 (en) * 1985-11-22 1985-12-24 Shell Int Research Acoustic logging device
CA1268850A (en) * 1986-02-19 1990-05-08 Leo J. Anderson Downhole casing inspection system
DE3776964D1 (de) * 1986-05-23 1992-04-09 Mobil Oil Corp Akustischer wandler fuer ein bohrlochmessgeraet.
US4794572A (en) * 1986-09-30 1988-12-27 Amoco Corporation Acoustic well logging method and system for obtaining a measure of formation anisotropy
US4951267A (en) * 1986-10-15 1990-08-21 Schlumberger Technology Corporation Method and apparatus for multipole acoustic logging
US4888743A (en) * 1986-10-30 1989-12-19 Amoco Corporation Method of seismic surveying for resolving the effects of formation anisotropy in shear wave reflection seismic data
US4933913A (en) * 1986-10-30 1990-06-12 Amoco Corporation Method of seismic surveying for resolving the effects of formation anisotropy in shear wave reflection seismic data
US4813028A (en) * 1987-07-07 1989-03-14 Schlumberger Technology Corporation Acoustic well logging method and apparatus
US4832148A (en) * 1987-09-08 1989-05-23 Exxon Production Research Company Method and system for measuring azimuthal anisotropy effects using acoustic multipole transducers
US4912979A (en) * 1987-10-14 1990-04-03 Amoco Corporation Method and apparatus for detecting and measuring elastic anisotropy

Also Published As

Publication number Publication date
TNSN90031A1 (fr) 1991-03-05
AU617043B2 (en) 1991-11-14
MA21772A1 (fr) 1990-10-01
US5036945A (en) 1991-08-06
IE900983L (en) 1990-09-17
DE69018114D1 (de) 1995-05-04
MX171789B (es) 1993-11-15
EP0388316B1 (en) 1995-03-29
NO901235L (no) 1990-09-18
NO901235D0 (no) 1990-03-16
JPH0681877B2 (ja) 1994-10-19
IE67788B1 (en) 1996-04-17
EP0388316A3 (en) 1991-11-13
ATE120556T1 (de) 1995-04-15
ZA902049B (en) 1991-03-27
JPH0355392A (ja) 1991-03-11
OA09188A (en) 1992-03-31
US5043952A (en) 1991-08-27
DK0388316T3 (da) 1995-08-14
BR9001263A (pt) 1991-03-26
MY105539A (en) 1994-10-31
AU5142790A (en) 1990-10-18
EP0388316A2 (en) 1990-09-19

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