Inflatable packing device and method of sealing

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/127 (2006.01) E21B 33/12 (2006.01)

Patent

CA 2049686

An inflatable packing device is provided for use i,n wellbore containing fluid. The inflatable packing device provides a seal between a conduit carrying the inflatable packing device and an interior surface within the wellbore. A cylindrical housing is provided having a central longitudinal axis, and including upper and lower collar members. A means for securing the cylindrical housing to the conduit is provided. An annular inflatable wall with upper and lower ends is secured to the upper and lower collar members respectively, with the annular inflatable wall disposed over at least a portion of the cylindrical housing. The annular inflatable wall includes an inner elastomeric sleeve covered by an array of movable slats. Upper and lower elastomeric annular covers are disposed over a portion of the annular inflat- able wall between the upper and lower collar members of the cylindrical housing. The upper and lower elastomeric annular covers are axially spaced apart relative to the central longitudinal axis of the cylindrical housing the elastomeric annular covers in part define upper and lower anchor regions. A central region of the annular inflatable wall is provided between the first and second elastomeric annular covers. The first and second anchor regions and the central region are outwardly movable from a non-inflated running position to an inflated setting position.

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