CA2453768A1 - Drilling with concentric strings of casing - Google Patents

Drilling with concentric strings of casing Download PDF

Info

Publication number
CA2453768A1
CA2453768A1 CA002453768A CA2453768A CA2453768A1 CA 2453768 A1 CA2453768 A1 CA 2453768A1 CA 002453768 A CA002453768 A CA 002453768A CA 2453768 A CA2453768 A CA 2453768A CA 2453768 A1 CA2453768 A1 CA 2453768A1
Authority
CA
Canada
Prior art keywords
casing
drill bit
drilling
casing strings
strings
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
CA002453768A
Other languages
French (fr)
Other versions
CA2453768C (en
Inventor
Gregory G. Galloway
David J. Brunnert
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 CA2585476A priority Critical patent/CA2585476C/en
Publication of CA2453768A1 publication Critical patent/CA2453768A1/en
Application granted granted Critical
Publication of CA2453768C publication Critical patent/CA2453768C/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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Abstract

The present invention provides a method and apparatus for setting concentric casing strings within a wellbore in one run-in of a casing working string. In one aspect of the invention, the apparatus comprises a drilling system comprising concentric casing strings, with each casing string having a drill bit piece disposed at the lower end thereof. The drill bit pieces of adjacent casing strings are releasably connected to one another. In another aspect of the invention, a method is provided for setting concentric casing strings within a wellbore with the drilling system. In another aspect of the invention, the releasably connected drill bit pieces comprise a drill bit assembly.
CA002453768A 2002-12-30 2003-12-22 Drilling with concentric strings of casing Expired - Fee Related CA2453768C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2585476A CA2585476C (en) 2002-12-30 2003-12-22 Drilling with concentric strings of casing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/331,964 US6857487B2 (en) 2002-12-30 2002-12-30 Drilling with concentric strings of casing
US10/331,964 2002-12-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2585476A Division CA2585476C (en) 2002-12-30 2003-12-22 Drilling with concentric strings of casing

Publications (2)

Publication Number Publication Date
CA2453768A1 true CA2453768A1 (en) 2004-06-30
CA2453768C CA2453768C (en) 2007-08-14

Family

ID=31188220

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002453768A Expired - Fee Related CA2453768C (en) 2002-12-30 2003-12-22 Drilling with concentric strings of casing

Country Status (5)

Country Link
US (2) US6857487B2 (en)
BR (1) BR0306091B1 (en)
CA (1) CA2453768C (en)
GB (1) GB2396870B (en)
NO (2) NO325166B1 (en)

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GB0329889D0 (en) 2004-01-28
NO20035809L (en) 2004-07-01
US7131505B2 (en) 2006-11-07
BR0306091B1 (en) 2015-03-10
GB2396870A (en) 2004-07-07
US20040124010A1 (en) 2004-07-01
US20050133274A1 (en) 2005-06-23
GB2396870B (en) 2006-08-23
BR0306091A (en) 2004-12-07
US6857487B2 (en) 2005-02-22
NO325166B1 (en) 2008-02-11
NO20080309L (en) 2004-07-01
CA2453768C (en) 2007-08-14

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