(19)
(11) EP 2 434 088 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.04.2014 Bulletin 2014/16

(43) Date of publication A2:
28.03.2012 Bulletin 2012/13

(21) Application number: 11250818.9

(22) Date of filing: 22.09.2011
(51) International Patent Classification (IPC): 
E21B 33/12(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 24.09.2010 US 889573

(71) Applicant: Weatherford/Lamb, Inc.
Houston Texas 77027 (US)

(72) Inventor:
  • Lembcke, Jeffrey John
    Cypress, TX 77429 (US)

(74) Representative: Shanks, Andrew et al
Marks & Clerk LLP Aurora 120 Bothwell Street
Glasgow G2 7JS
Glasgow G2 7JS (GB)

   


(54) Universal backup for swellable packers


(57) A universal backup member is provided for use on packers and other downhole tools that use members selected for expansion upon exposure to a wellbore fluid. The backup member prevents axial extrusion of the swellable member. An elastomer portion of the backup member is selected for expansion in wellbore fluids that include both aqueous solutions and hydrocarbons, without regard to the fluid in the wellbore.







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