CA2225595A1 - Centralizer - Google Patents

Centralizer

Info

Publication number
CA2225595A1
CA2225595A1 CA002225595A CA2225595A CA2225595A1 CA 2225595 A1 CA2225595 A1 CA 2225595A1 CA 002225595 A CA002225595 A CA 002225595A CA 2225595 A CA2225595 A CA 2225595A CA 2225595 A1 CA2225595 A1 CA 2225595A1
Authority
CA
Canada
Prior art keywords
grooves
centralizer
collars
movement
tubular body
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
CA002225595A
Other languages
French (fr)
Other versions
CA2225595C (en
Inventor
Brent James Lirette
James George Martens
Robert Porter Vilyus
Brad Walter Hebert
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
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
Priority claimed from US08/484,171 external-priority patent/US5575333A/en
Application filed by Individual filed Critical Individual
Publication of CA2225595A1 publication Critical patent/CA2225595A1/en
Application granted granted Critical
Publication of CA2225595C publication Critical patent/CA2225595C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
    • E21B17/1028—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Springs (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

A centralizer (10) comprises a tubular body (12) provided with two spaced apart grooves (18). The ends of spring bows (20) are mounted on collars (24, 26) which are slidably mounted in respective ones of the grooves (18). In use, movement of the spring bow (20) against the tubular body (12) can be accommodated by movement of the collars (24, 26) along the grooves (18).
CA002225595A 1995-06-07 1996-06-07 Centralizer Expired - Lifetime CA2225595C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/484,171 US5575333A (en) 1995-06-07 1995-06-07 Centralizer
US08/484,171 1995-06-07
PCT/GB1996/001346 WO1996041063A1 (en) 1995-06-07 1996-06-07 Centralizer

Publications (2)

Publication Number Publication Date
CA2225595A1 true CA2225595A1 (en) 1996-12-19
CA2225595C CA2225595C (en) 2007-08-14

Family

ID=38434475

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002225595A Expired - Lifetime CA2225595C (en) 1995-06-07 1996-06-07 Centralizer

Country Status (1)

Country Link
CA (1) CA2225595C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117514031A (en) * 2024-01-05 2024-02-06 青州市春晖科技发展有限公司 Casing centralizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117514031A (en) * 2024-01-05 2024-02-06 青州市春晖科技发展有限公司 Casing centralizer
CN117514031B (en) * 2024-01-05 2024-03-19 青州市春晖科技发展有限公司 Casing centralizer

Also Published As

Publication number Publication date
CA2225595C (en) 2007-08-14

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20160607

MKEX Expiry

Effective date: 20160607