NO974003L - Position Detection Device - Google Patents

Position Detection Device

Info

Publication number
NO974003L
NO974003L NO974003A NO974003A NO974003L NO 974003 L NO974003 L NO 974003L NO 974003 A NO974003 A NO 974003A NO 974003 A NO974003 A NO 974003A NO 974003 L NO974003 L NO 974003L
Authority
NO
Norway
Prior art keywords
magnetic
detection device
position detection
magnetic poles
predetermined direction
Prior art date
Application number
NO974003A
Other languages
Norwegian (no)
Other versions
NO974003D0 (en
Inventor
Kenneth Stephen Evans
Original Assignee
Baroid Technology Inc
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 Baroid Technology Inc filed Critical Baroid Technology Inc
Publication of NO974003D0 publication Critical patent/NO974003D0/en
Publication of NO974003L publication Critical patent/NO974003L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • E21B47/024—Determining slope or direction of devices in the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
    • E21B47/092—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting magnetic anomalies

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Vehicle Body Suspensions (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

En posisjonsdeteksjonsanordning for deteksjon av posisjonen av stillbare stabilisatorblad (3) i en bunnmontasje i en borestreng (2) i et borehull omfatter en magnetisk krets med variabel reluk- tans, hvilken krets omfatter en indre magnetdel (7) og en ytre, magnetiserbar del (4) som er bevegelige i forhold til hverandre langs en forutbestemt retning (5) mellom to tilstander i hvilke reluk- tansen av den magnetiske krets er for- skjellig på grunn av de forskjellige relative posisjoner av de indre og ytre deler (7, 4). Den indre del (7) omfatter en detektor (8) omfattende en permanent- magnet (9 ) med magnetpoler som er orien- tert slik at det tilveiebringes et mag- netisk felt med et parti som strekker seg på tvers av den forutbestemte ret- ning (5), og en magnetoresistiv fluks- føler (15) med en avfølingsakse (17) som er orientert i forhold til magnetpolene slik at det tilveiebringes et utgangs- signal som indikerer vinkelen mellom den avfølte fluks i nærheten av den ene av magnetpolene og avfølingsaksen (17) og avhengig av de relative posisjoner av de indre og ytre deler (7, 4). En slik ny posisjonsdeteksjonsanordning tilveie- bringer en sikker indikasjon på posi- sjonen av stabilisatorbladene ved en slik anvendelse.A position detection device for detecting the position of adjustable stabilizer blades (3) in a bottom assembly of a drill string (2) in a borehole comprises a variable reluctance magnetic circuit, which comprises an inner magnetic portion (7) and an outer, magnetizable portion ( 4) which are movable relative to each other along a predetermined direction (5) between two states in which the reluctance of the magnetic circuit is different due to the different relative positions of the inner and outer parts (7, 4) . The inner portion (7) comprises a detector (8) comprising a permanent magnet (9) with magnetic poles oriented so as to provide a magnetic field with a portion extending transverse to the predetermined direction. (5), and a magnetoresistive flux sensor (15) having a sensing axis (17) oriented relative to the magnetic poles so as to provide an output signal indicating the angle between the sensed flux near one of the magnetic poles and the sensing axis (17) and depending on the relative positions of the inner and outer parts (7, 4). Such a new position detection device provides a safe indication of the position of the stabilizer blades in such application.

NO974003A 1995-03-02 1997-09-01 Position Detection Device NO974003L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9504151.3A GB9504151D0 (en) 1995-03-02 1995-03-02 Position detection devices
PCT/GB1996/000444 WO1996027068A1 (en) 1995-03-02 1996-02-29 Position detection devices

Publications (2)

Publication Number Publication Date
NO974003D0 NO974003D0 (en) 1997-09-01
NO974003L true NO974003L (en) 1997-10-31

Family

ID=10770488

Family Applications (1)

Application Number Title Priority Date Filing Date
NO974003A NO974003L (en) 1995-03-02 1997-09-01 Position Detection Device

Country Status (5)

Country Link
EP (1) EP0811107A1 (en)
CA (1) CA2213849A1 (en)
GB (1) GB9504151D0 (en)
NO (1) NO974003L (en)
WO (1) WO1996027068A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2108678B (en) * 1981-10-17 1985-09-11 Armstrong Patents Co Ltd Shock absorber or ram position sensing system
US4719419A (en) * 1985-07-15 1988-01-12 Harris Graphics Corporation Apparatus for detecting a rotary position of a shaft
DE3735066A1 (en) * 1987-10-16 1989-04-27 Bochumer Eisen Heintzmann PRESSURE SENSOR
US5545983A (en) * 1992-03-02 1996-08-13 Seiko Epson Corporation Displacement sensor with temperature compensation by combining outputs in a predetermined ratio
US5311953A (en) * 1992-08-07 1994-05-17 Baroid Technology, Inc. Drill bit steering
US5318137A (en) * 1992-10-23 1994-06-07 Halliburton Company Method and apparatus for adjusting the position of stabilizer blades

Also Published As

Publication number Publication date
NO974003D0 (en) 1997-09-01
AU690822B2 (en) 1998-04-30
EP0811107A1 (en) 1997-12-10
WO1996027068A1 (en) 1996-09-06
GB9504151D0 (en) 1995-04-19
AU4837896A (en) 1996-09-18
CA2213849A1 (en) 1996-09-06

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