(19)
(11) EP 2 407 632 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: 11166245.8

(22) Date of filing: 16.05.2011
(51) International Patent Classification (IPC): 
E21B 33/124(2006.01)
E21B 33/134(2006.01)
E21B 23/06(2006.01)
 E21B 33/128(2006.01)
E21B 23/04(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 835687

(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 
D.W. & S.W. GEE 1 South Lynn Gardens London Road
Shipston on Stour Warwickshire CV36 4ER
Shipston on Stour Warwickshire CV36 4ER (GB)

   


(54) Downhole packer having swellable sleeve


(57) A packer (200) seals a wellbore annulus. The packer has a body defining a bore therethrough and has a swellable element (250) disposed on the body. An expander (240) movably disposed on the body adjacent the swellable element is actuated by fluid pressure communicated through a port in the body's bore. When actuated, the expander fits between the swellable element and the body to expand the swellable element radially outward an initial expansion amount. While downhole, the swellable element swells in the presence of an agent downhole and expands radially outward a subsequent expansion amount to produce a seal with a surrounding surface. With further fluid pressure, the expander can also compress the swellable element to further increase the expansion amount of the swellable element.







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