CA2454496A1 - Expandable bit with a secondary release device - Google Patents

Expandable bit with a secondary release device Download PDF

Info

Publication number
CA2454496A1
CA2454496A1 CA002454496A CA2454496A CA2454496A1 CA 2454496 A1 CA2454496 A1 CA 2454496A1 CA 002454496 A CA002454496 A CA 002454496A CA 2454496 A CA2454496 A CA 2454496A CA 2454496 A1 CA2454496 A1 CA 2454496A1
Authority
CA
Canada
Prior art keywords
expandable bit
expandable
wellbore
forming
bit
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
CA002454496A
Other languages
French (fr)
Other versions
CA2454496C (en
Inventor
Andrew D. Gledhill
Kenneth J. Dalrymple
Mark S. Fuller
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.)
Weatherford Technology Holdings LLC
Original Assignee
Weatherford Lamb 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 Weatherford Lamb Inc filed Critical Weatherford Lamb Inc
Priority to CA2615667A priority Critical patent/CA2615667C/en
Publication of CA2454496A1 publication Critical patent/CA2454496A1/en
Application granted granted Critical
Publication of CA2454496C publication Critical patent/CA2454496C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
    • 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
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable

Abstract

The present invention generally relates to an apparatus and method of forming a wellbore. In one aspect, an expandable bit for use in a wellbore is provided. The expandable bit includes a body and a blade assembly disposed on the body. The blade assembly is movable between a closed position whereby the expandable bit has a smaller outer diameter and an open position whereby the expandable bit has a larger outer diameter. The expandable bit further includes a release assembly for providing a secondary means to move the blade assembly from the open position to the closed position. In another aspect, a method of forming a wellbore is provided. In yet another aspect, an expandable apparatus for use in forming a wellbore is provided.
CA002454496A 2002-12-31 2003-12-24 Expandable bit with a secondary release device Expired - Fee Related CA2454496C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2615667A CA2615667C (en) 2002-12-31 2003-12-24 Expandable bit with a secondary release device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/335,957 US6953096B2 (en) 2002-12-31 2002-12-31 Expandable bit with secondary release device
US10/335,957 2002-12-31

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2615667A Division CA2615667C (en) 2002-12-31 2003-12-24 Expandable bit with a secondary release device

Publications (2)

Publication Number Publication Date
CA2454496A1 true CA2454496A1 (en) 2004-06-30
CA2454496C CA2454496C (en) 2008-02-26

Family

ID=31188231

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002454496A Expired - Fee Related CA2454496C (en) 2002-12-31 2003-12-24 Expandable bit with a secondary release device

Country Status (5)

Country Link
US (1) US6953096B2 (en)
BR (1) BR0306089B1 (en)
CA (1) CA2454496C (en)
GB (1) GB2396871B (en)
NO (1) NO325281B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7131504B2 (en) 2002-12-31 2006-11-07 Weatherford/Lamb, Inc. Pressure activated release member for an expandable drillbit

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CA2454496C (en) 2008-02-26
BR0306089B1 (en) 2014-11-18
GB2396871B (en) 2006-08-23
US20040124011A1 (en) 2004-07-01
BR0306089A (en) 2004-12-07
GB2396871A (en) 2004-07-07
US6953096B2 (en) 2005-10-11
NO325281B1 (en) 2008-03-17
GB0329896D0 (en) 2004-01-28

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