EP3833846A1 - Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure - Google Patents

Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure

Info

Publication number
EP3833846A1
EP3833846A1 EP19773521.0A EP19773521A EP3833846A1 EP 3833846 A1 EP3833846 A1 EP 3833846A1 EP 19773521 A EP19773521 A EP 19773521A EP 3833846 A1 EP3833846 A1 EP 3833846A1
Authority
EP
European Patent Office
Prior art keywords
piston
centralizer
casing
mandrel
liner string
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.)
Withdrawn
Application number
EP19773521.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jonathan Buckland
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.)
Downhole Products Ltd
Original Assignee
Downhole Products Ltd
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 Downhole Products Ltd filed Critical Downhole Products Ltd
Publication of EP3833846A1 publication Critical patent/EP3833846A1/en
Withdrawn legal-status Critical Current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

Definitions

  • Figures 2A, 2B, and 3A illustrate a typical one of the centralizers in the retracted position.
  • a lip of each end ring 5p,w extending past the respective collar 4p,w may be split into a multitude of tabs (before or after insertion of the collars) and the tabs may be bent over the respective collar, thereby mounting the collars to the body 5 (in addition to the spot welds).
  • the anchor 10 may include a locking ring 10r and a plurality of set screws 10s.
  • the locking ring 10r may have a plurality of threaded sockets formed through a wall thereof and spaced therearound. The set screws 10s may be driven into the threaded sockets and into engagement with a periphery of the casing or liner string 1 , thereby mounting the locking ring 10r to the casing or liner string.
  • the inner surface of the head of the piston 7p may have a straight portion for receiving the dogs 6 and the outer surface of each dog may have a straight portion for engagement with the straight portion of the head or the inner surface of the head of the piston may be partially straight and partially conical and the outer surface of each dog may be partially straight and partially inclined.

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)
  • Earth Drilling (AREA)
EP19773521.0A 2018-08-10 2019-07-24 Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure Withdrawn EP3833846A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862717324P 2018-08-10 2018-08-10
PCT/IB2019/056329 WO2020031010A1 (en) 2018-08-10 2019-07-24 Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure

Publications (1)

Publication Number Publication Date
EP3833846A1 true EP3833846A1 (en) 2021-06-16

Family

ID=68051845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19773521.0A Withdrawn EP3833846A1 (en) 2018-08-10 2019-07-24 Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure

Country Status (5)

Country Link
US (1) US20210270092A1 (ru)
EP (1) EP3833846A1 (ru)
CN (1) CN112534115A (ru)
EA (1) EA202190187A1 (ru)
WO (1) WO2020031010A1 (ru)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113356769B (zh) * 2021-07-02 2022-12-30 中国农业大学 形状记忆合金可变径扶正器及扶正性能测试方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523640A (en) 1984-01-23 1985-06-18 Dresser Industries, Inc. Arm release system for well logging apparatus
US5086844A (en) * 1989-10-10 1992-02-11 Union Oil Company Of California Hydraulic release oil tool
EP0511254B1 (en) * 1990-01-17 1995-03-01 WEATHERFORD/LAMB, INC. (a Delaware Corporation) Centralizers for oil well casings
US5097905A (en) 1991-01-28 1992-03-24 Mobil Oil Corporation Centralizer for well casing
EP2340350B1 (en) 2008-09-29 2016-09-07 Frank's International, LLC Downhole device actuator and method
GB201100543D0 (en) * 2011-01-13 2011-03-02 Downhole Products Ltd Centraliser
US9580976B1 (en) 2013-03-14 2017-02-28 Sandia Corporation Deployable centralizers
US10113372B2 (en) 2013-07-30 2018-10-30 Weatherford Technology Holdings, Llc Centralizer
SE1451379A1 (en) * 2014-11-17 2016-05-18 Vanguard Oil Tools & Services Llc Temperature activated zonal isolation packer

Also Published As

Publication number Publication date
EA202190187A1 (ru) 2021-07-21
US20210270092A1 (en) 2021-09-02
WO2020031010A1 (en) 2020-02-13
CN112534115A (zh) 2021-03-19

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