CA2425565A1 - Magnetic sensor system useful for detecting tool joints in a downhold tubing string - Google Patents

Magnetic sensor system useful for detecting tool joints in a downhold tubing string Download PDF

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Publication number
CA2425565A1
CA2425565A1 CA002425565A CA2425565A CA2425565A1 CA 2425565 A1 CA2425565 A1 CA 2425565A1 CA 002425565 A CA002425565 A CA 002425565A CA 2425565 A CA2425565 A CA 2425565A CA 2425565 A1 CA2425565 A1 CA 2425565A1
Authority
CA
Canada
Prior art keywords
tubing string
magnetic field
cylindrical space
ferrous
tool joints
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
CA002425565A
Other languages
French (fr)
Other versions
CA2425565C (en
Inventor
Mahendran S. Relton
John S. Burlington
Jason P. Macinnis
Jonathan J. Falcon
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.)
Smith International Inc
Original Assignee
Thomas Energy Services 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 Thomas Energy Services Inc filed Critical Thomas Energy Services Inc
Publication of CA2425565A1 publication Critical patent/CA2425565A1/en
Application granted granted Critical
Publication of CA2425565C publication Critical patent/CA2425565C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9006—Details, e.g. in the structure or functioning of sensors

Abstract

A method and apparatus for detecting ferrous changes passing axially through a cylindrical space. In one embodiment, the method comprises surrounding the cylindrical space with a nonmagnetic cylinder having an outer wall and a cylindrical axis; creating an alternating magnetic field in the cylindrical space, the magnetic field created by a rotatable permanent magnet; monitoring the magnetic field with magnetic flux sensors placed outside the outer walls; and detecting changes in the magnetic field as ferrous matter passes axially through the cylindrical space. In other embodiments, the apparatus identifies ferrous changes as the tool joints that connect a jointed tubing string as the tubing string is moved in or out of a well bore, or as the presence or absence of a coiled tubing string in the well bore.
CA002425565A 2002-04-16 2003-04-14 Magnetic sensor system useful for detecting tool joints in a downhold tubing string Expired - Fee Related CA2425565C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/125,005 US6720764B2 (en) 2002-04-16 2002-04-16 Magnetic sensor system useful for detecting tool joints in a downhold tubing string
US10/125,005 2002-04-16

Publications (2)

Publication Number Publication Date
CA2425565A1 true CA2425565A1 (en) 2003-10-16
CA2425565C CA2425565C (en) 2006-07-25

Family

ID=22417797

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002425565A Expired - Fee Related CA2425565C (en) 2002-04-16 2003-04-14 Magnetic sensor system useful for detecting tool joints in a downhold tubing string

Country Status (4)

Country Link
US (1) US6720764B2 (en)
CA (1) CA2425565C (en)
GB (1) GB2390906B (en)
NO (1) NO334363B1 (en)

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Also Published As

Publication number Publication date
GB2390906B (en) 2006-03-08
US20030193329A1 (en) 2003-10-16
NO334363B1 (en) 2014-02-17
NO20031732D0 (en) 2003-04-15
GB2390906A (en) 2004-01-21
GB0308818D0 (en) 2003-05-21
US6720764B2 (en) 2004-04-13
NO20031732L (en) 2003-10-17
CA2425565C (en) 2006-07-25

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EEER Examination request
MKLA Lapsed

Effective date: 20180416