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US 2011/0297400 A1Published application
Expandable Packer Construction
AssigneeSchlumberger Technology Corporation
InventorsJean-Louis Pessin, Pierre-Yves Corre, Guillaume Boutillon
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Abstract
A technique involves a packer formed as an expandable packer with an internal expandable bladder. The expandable bladder is formed with a section that is radially enlarged relative to an axial end of the expandable bladder when the bladder is in a relaxed state. The bladder configuration enables use of a reduced expansion ratio while still allowing expansion of the packer to a desired large diameter.
Claims20
A method comprising:
- deploying a packer into a wellbore, the packer having an expandable bladder with a radially enlargeable midsection disposed between a first bladder end and a second bladder end;
- expanding the packer in the wellbore such that an expanded diameter of the midsection of the bladder is greater than a diameter of the first bladder end and the second bladder end;
- and
- retracting the packer to a diameter less than the expanded diameter by applying an axial force along the packer with an auto retract mechanism.
1 more element
A packer for use in a wellbore comprising:
- an expandable bladder connected to a first bladder end and a second bladder end, wherein each bladder end has a diameter less than a diameter of the expandable bladder in a relaxed state;
- an auto retract mechanism connected to the first bladder end or the second bladder end to apply axial force to expand or retract the expandable packer.
A system for use in a well, comprising:
- a packer comprising:
- a pair of packer extremities;
- and
- an expandable bladder connected to the pair of packer extremities and having a generally tubular shape, the expandable bladder having a radially enlarged midsection between a pair of bladder ends, the radially enlarged midsection being of greater diameter than the pair of bladder ends when the expandable bladder is in a relaxed state.
1 more element
Dependencies are inferred from the claim text.