(19)
(11) EP 2 407 633 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.08.2013 Bulletin 2013/33

(43) Date of publication A2:
18.01.2012 Bulletin 2012/03

(21) Application number: 11166237.5

(22) Date of filing: 16.05.2011
(51) International Patent Classification (IPC): 
E21B 33/128(2006.01)
E21B 23/06(2006.01)
 E21B 33/124(2006.01)
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: 13.07.2010 US 835684

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

(72) Inventors:
  • Wilkin, James F.
    Sherwood Park Alberta T8B 1N3 (CA)
  • Jordan, Henry Joe Jr.
    Willis, TX 77318 (US)

(74) Representative: Gee, Steven William 
1 South Lynn Gardens, London Road
Shipston on Stour, Warwickshire CV36 4ER
Shipston on Stour, Warwickshire CV36 4ER (GB)

   


(54) Downhole packer having tandem packer elements for isolating frac zones


(57) A tandem packer (100) seals a wellbore annulus with first and second seals. The packer has a body defining a bore therethrough and has a shoulder disposed on the body. A compressible element (150) is disposed on the body adjacent the shoulder. A piston is movably disposed on the body adjacent the compressible element and is activated by fluid pressure communicated through a port in the packer's bore. When actuated, the piston fits between the compressible element and the body to initially expand it outward. With further fluid pressure, the piston compresses the compressible element against the shoulder to expand the element radially outward and produce a first seal with a surrounding surface. A swellable element (180) also disposed on the body is swellable in the presence of an agent and expands radially outward to produce a second seal with the surrounding surface.







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