ATE503076T1 - FIELD-MOUNT DRILL CENTERING DEVICE WITH ARCH SPRINGS AND METHOD FOR PRODUCING A CENTERING DEVICE - Google Patents

FIELD-MOUNT DRILL CENTERING DEVICE WITH ARCH SPRINGS AND METHOD FOR PRODUCING A CENTERING DEVICE

Info

Publication number
ATE503076T1
ATE503076T1 AT08746600T AT08746600T ATE503076T1 AT E503076 T1 ATE503076 T1 AT E503076T1 AT 08746600 T AT08746600 T AT 08746600T AT 08746600 T AT08746600 T AT 08746600T AT E503076 T1 ATE503076 T1 AT E503076T1
Authority
AT
Austria
Prior art keywords
extruded
holes
bow
threaded
centering device
Prior art date
Application number
AT08746600T
Other languages
German (de)
Inventor
Jean Buytaert
Eugene Miller
Original Assignee
Frank S Inr 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 Frank S Inr Inc filed Critical Frank S Inr Inc
Application granted granted Critical
Publication of ATE503076T1 publication Critical patent/ATE503076T1/en

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
    • E21B17/10—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

Abstract

A casing centralizer is provided that may be shipped unassembled and is then assemblable at a well site. According to one embodiment, first and second collars each have a plurality of circumferentially spaced aligning slots and a corresponding plurality of threaded, extruded through-holes. A plurality of bow-springs each have a foot at each end. Each bow-spring axially extends between the first and second collars. The foot at one end of each bow-spring is disposed in one of the aligning slots of the first collar, and the foot at the other end is disposed in one of the aligning slots on the second collar. A plurality of threaded fasteners corresponding in number to the threaded extruded through-holes secure the ends of the bow-springs to the threaded extruded through-holes. The extruded through-holes have a flange height greater than a collar thickness adjacent to the extruded through-holes. The increased flange height allows more threads to be formed within the extruded holes, resulting in a stronger threaded connection with the threaded fasteners, and a correspondingly stronger, more durable centralizer. The foot is retained within the aligning slot to reinforce the coupling between the bow-spring and the collar. A method of manufacturing the casing centralizer is also provided.
AT08746600T 2007-04-24 2008-04-23 FIELD-MOUNT DRILL CENTERING DEVICE WITH ARCH SPRINGS AND METHOD FOR PRODUCING A CENTERING DEVICE ATE503076T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/739,284 US20080264629A1 (en) 2007-04-24 2007-04-24 Field-Assemblable Bow-Spring Casing Centralizer and Method of Making A Centralizer
PCT/US2008/061211 WO2008134333A1 (en) 2007-04-24 2008-04-23 Field-assemblable bow-spring casing centralizer and method of making a centralizer

Publications (1)

Publication Number Publication Date
ATE503076T1 true ATE503076T1 (en) 2011-04-15

Family

ID=39670923

Family Applications (1)

Application Number Title Priority Date Filing Date
AT08746600T ATE503076T1 (en) 2007-04-24 2008-04-23 FIELD-MOUNT DRILL CENTERING DEVICE WITH ARCH SPRINGS AND METHOD FOR PRODUCING A CENTERING DEVICE

Country Status (7)

Country Link
US (1) US20080264629A1 (en)
EP (1) EP2148972B1 (en)
AT (1) ATE503076T1 (en)
BR (1) BRPI0811029A2 (en)
CA (1) CA2684895A1 (en)
DE (1) DE602008005730D1 (en)
WO (1) WO2008134333A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2465587B (en) * 2008-11-21 2011-12-14 Brian Nutley Centralising tool and method of forming
GB0913979D0 (en) * 2009-08-10 2009-09-16 Domain Licences Ltd Downhole device
US20130062073A1 (en) * 2011-09-14 2013-03-14 Nathan Landsiedel Packer Assembly with a Standoff
GB2525250A (en) * 2014-04-17 2015-10-21 Reece Innovation Ct Ltd Improvments in or relating to live well injection
WO2016014571A1 (en) * 2014-07-21 2016-01-28 Weatherford Technology Holdings, Llc Composite bow spring centralizer
US9664001B2 (en) * 2014-09-24 2017-05-30 Centek Limited Centralizer and associated devices
CN110924876B (en) * 2019-12-18 2021-07-30 大庆市宏博晟达石油机械设备有限公司 A but, reducing centralizer for pneumatic drill spraying
CN111395986A (en) * 2020-05-14 2020-07-10 中勘资源勘探科技股份有限公司 Logging instrument fishing device for large-diameter drilling of coal mine
CN117346036B (en) * 2023-12-06 2024-02-23 青岛地质工程勘察院(青岛地质勘查开发局) Survey device suitable for weak soil ground subsides

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Also Published As

Publication number Publication date
DE602008005730D1 (en) 2011-05-05
US20080264629A1 (en) 2008-10-30
BRPI0811029A2 (en) 2014-12-09
WO2008134333A1 (en) 2008-11-06
CA2684895A1 (en) 2008-11-06
EP2148972B1 (en) 2011-03-23
EP2148972A1 (en) 2010-02-03

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