CA2362473A1 - Method and apparatus for protecting a sensor in a drill collar - Google Patents

Method and apparatus for protecting a sensor in a drill collar Download PDF

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Publication number
CA2362473A1
CA2362473A1 CA002362473A CA2362473A CA2362473A1 CA 2362473 A1 CA2362473 A1 CA 2362473A1 CA 002362473 A CA002362473 A CA 002362473A CA 2362473 A CA2362473 A CA 2362473A CA 2362473 A1 CA2362473 A1 CA 2362473A1
Authority
CA
Canada
Prior art keywords
borehole
region
substantially uniform
location
uniform magnetic
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.)
Granted
Application number
CA002362473A
Other languages
French (fr)
Other versions
CA2362473C (en
Inventor
Thomas Kruspe
Robert A. Slade
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.)
Baker Hughes Holdings LLC
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2362473A1 publication Critical patent/CA2362473A1/en
Application granted granted Critical
Publication of CA2362473C publication Critical patent/CA2362473C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/32—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance

Abstract

A method and apparatus for determining a characteristic of an earth formation surrounding a borehole in which a pulsed nuclear magnetic resonance (NMR) tool is received. A static magnetic field is produced in the borehole using at least two spaced-apart magnets (132, 134) in the NMR tool. The static magnetic field has a first region of substantially uniform magnetic intensity at a first location in the borehole, the first location in the borehole having a first temperature. The NMR tool is moved to a second location in the borehole having a second temperature, and a static magnetic field having a second region of substantially uniform magnetic is produced. The at least two spaced-apart magnets are controllably moved relative to each other wherein the first region of substantially uniform magnetic intensity and the second region of substantially uniform magnetic intensity are substantially equal in size and distance from the NMR tool.
CA002362473A 1999-02-12 2000-02-14 Method and apparatus for protecting a sensor in a drill collar Expired - Fee Related CA2362473C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/249,964 US6114851A (en) 1999-02-12 1999-02-12 Temperature compensated nuclear magnetic resonance apparatus and method
US09/249,964 1999-02-12
PCT/US2000/003746 WO2000048021A1 (en) 1999-02-12 2000-02-14 Temperature compensated nuclear magnetic resonance apparatus and method

Publications (2)

Publication Number Publication Date
CA2362473A1 true CA2362473A1 (en) 2000-08-17
CA2362473C CA2362473C (en) 2003-09-09

Family

ID=22945755

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002362473A Expired - Fee Related CA2362473C (en) 1999-02-12 2000-02-14 Method and apparatus for protecting a sensor in a drill collar

Country Status (7)

Country Link
US (2) US6114851A (en)
EP (1) EP1153321A1 (en)
AU (1) AU761610B2 (en)
CA (1) CA2362473C (en)
GB (1) GB2363467B (en)
NO (1) NO20013914L (en)
WO (1) WO2000048021A1 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7501817B1 (en) * 1998-03-03 2009-03-10 Schlumberger Technology Corporation Method and apparatus for generating an axisymmetric magnetic field
US6727696B2 (en) * 1998-03-06 2004-04-27 Baker Hughes Incorporated Downhole NMR processing
US6114851A (en) * 1999-02-12 2000-09-05 Baker Hughes Incorporated Temperature compensated nuclear magnetic resonance apparatus and method
WO2000054069A1 (en) * 1999-03-10 2000-09-14 Koninklijke Philips Electronics N.V. Method of and device for the compensation of variations of the main magnetic field during magnetic resonance imaging
FR2811767B1 (en) * 2000-07-13 2002-09-20 Innov Pro DEVICE FOR EVALUATING THE DENSITY OF PROTONS PRESENT IN A GIVEN BODY
US6577125B2 (en) * 2000-12-18 2003-06-10 Halliburton Energy Services, Inc. Temperature compensated magnetic field apparatus for NMR measurements
US6400149B1 (en) * 2001-05-24 2002-06-04 Schlumberger Technology Corporation Nuclear magnetic resonance apparatus and method for generating an axisymmetric magnetic field having straight contour lines in the resonance region
US7301338B2 (en) * 2001-08-13 2007-11-27 Baker Hughes Incorporated Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis
DE10224192A1 (en) * 2002-05-31 2003-12-18 Fraunhofer Ges Forschung Imaging NMR method and NMR device
WO2004099817A2 (en) 2003-05-02 2004-11-18 Halliburton Energy Services, Inc. Systems and methods for nmr logging
CA2852097A1 (en) 2003-10-03 2005-04-21 Halliburton Energy Services, Inc. System and methods for t1-based logging
US7196516B2 (en) * 2004-08-16 2007-03-27 Baker Hughes Incorporated Correction of NMR artifacts due to constant-velocity axial motion and spin-lattice relaxation
US20090121711A1 (en) * 2007-08-01 2009-05-14 Baker Hughes Incorporated Thermally stabilized magnets for use downhole
US8860413B2 (en) * 2010-11-19 2014-10-14 Schlumberger Technology Corporation Nuclear magnetic resonance tool with movable magnets
US9638343B2 (en) * 2011-12-12 2017-05-02 Massachusetts Institute Of Technology Sharp-phase change shape memory alloy thermal actuator
US10016140B2 (en) 2012-06-13 2018-07-10 Koninklijke Philips N.V. Automated non-magnetic medical monitor using shape memory actuators
US9482631B2 (en) 2013-05-14 2016-11-01 Chevron U.S.A. Inc. Formation core sample holder assembly and testing method for nuclear magnetic resonance measurements
US10495588B2 (en) * 2014-11-12 2019-12-03 Halliburton Energy Services, Inc. Borehole signal reduction for a side-looking NMR logging tool using a magnet assembly
US9851315B2 (en) 2014-12-11 2017-12-26 Chevron U.S.A. Inc. Methods for quantitative characterization of asphaltenes in solutions using two-dimensional low-field NMR measurement
WO2016099473A1 (en) * 2014-12-17 2016-06-23 Halliburton Energy Services, Inc. Directional drilling systems, apparatus, and methods
CN107250826B (en) * 2014-12-30 2021-02-02 哈里伯顿能源服务公司 Nuclear magnetic resonance tool with projections for improved measurement
WO2017069753A1 (en) * 2015-10-21 2017-04-27 Halliburton Energy Services, Inc. Hybrid transceiver for downhole telemetry
US10634746B2 (en) 2016-03-29 2020-04-28 Chevron U.S.A. Inc. NMR measured pore fluid phase behavior measurements
US11480032B2 (en) * 2020-03-02 2022-10-25 Weatherford Technology Holdings, Llc Debris collection tool

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4350955A (en) * 1980-10-10 1982-09-21 The United States Of America As Represented By The United States Department Of Energy Magnetic resonance apparatus
US4595878A (en) * 1982-09-15 1986-06-17 Standard Oil Company (Indiana) NMR measurement on frozen cores
US4717876A (en) * 1986-08-13 1988-01-05 Numar NMR magnet system for well logging
US4933638A (en) * 1986-08-27 1990-06-12 Schlumber Technology Corp. Borehole measurement of NMR characteristics of earth formations, and interpretations thereof
GB9022145D0 (en) * 1990-10-11 1990-11-21 Oxford Instr Ltd Magnetic field generating assembly
DE69123260T2 (en) * 1990-12-05 1997-06-12 Numar Corp ARRANGEMENT FOR MEASURING A DRILL HOLE DURING DRILLING
DE4215454C1 (en) * 1992-05-11 1993-07-29 Bruker Analytische Messtechnik Gmbh, 7512 Rheinstetten, De
US5432446A (en) * 1992-11-02 1995-07-11 Schlumberger Technology Corporation Borehole measurement of NMR characteristics of earth formation
US5757186A (en) * 1996-02-23 1998-05-26 Western Atlas International, Inc. Nuclear magnetic resonance well logging apparatus and method adapted for measurement-while-drilling
US5959453A (en) * 1997-10-29 1999-09-28 Western Atlas International, Inc. Radial NMR well logging apparatus and method
NO981173L (en) * 1997-05-02 1998-11-03 Western Atlas Int Inc NMR logging apparatus and method
US6114851A (en) * 1999-02-12 2000-09-05 Baker Hughes Incorporated Temperature compensated nuclear magnetic resonance apparatus and method

Also Published As

Publication number Publication date
GB2363467A (en) 2001-12-19
AU761610B2 (en) 2003-06-05
US6114851A (en) 2000-09-05
CA2362473C (en) 2003-09-09
AU3230700A (en) 2000-08-29
GB0121474D0 (en) 2001-10-24
GB2363467B (en) 2004-02-25
WO2000048021A1 (en) 2000-08-17
NO20013914L (en) 2001-10-10
NO20013914D0 (en) 2001-08-10
US6218833B1 (en) 2001-04-17
EP1153321A1 (en) 2001-11-14

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