Swellable packer with composite material end rings
AssigneeHalliburton Energy Services, Inc.
InventorsTom R. Koloy, Jonny Haugen, David B. Allison
Life of this patent
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Abstract
A swellable packer with composite material end rings. A packer assembly includes at least one generally tubular seal element extending longitudinally between opposite ends thereof. At least one end ring is positioned proximate one of the seal element opposite ends. The end ring includes a nonmetal material. A method of constructing a packer assembly includes the steps of: chemically bonding at least one end ring to a base pipe; providing at least one generally tubular seal element which extends longitudinally between opposite ends thereof; and restricting longitudinal displacement of the seal element relative to the base pipe utilizing the end ring positioned at one of its opposite ends.
Claims17
A packer assembly, comprising:
- a base pipe;
- two end rings molded onto the base pipe, the end rings comprising a first composite material;
- and
- at least one swellable seal element molded onto the base pipe between the end rings,
- wherein the end rings at least partially define a molding volume of the swellable seal element,
- wherein the end rings do not displace relative to the base pipe when the seal element swells, thereby retaining the seal element axially in place on the base pipe, and
- wherein each of the end rings includes on a side opposite the seal element a profile which facilitates conveyance of the packer assembly in a well.
A method of constructing a packer assembly, the method comprising the steps of:
- molding two end rings onto a base pipe, the end rings comprising a first composite material;
- and
- then positioning at least one swellable seal element on the base pipe between the end rings,
- wherein the end rings do not displace relative to the base pipe when the seal element swells, thereby retaining the seal element axially in place on the base pipe, and
- wherein each of the end rings includes on a side opposite the seal element a profile which facilitates conveyance of the packer assembly in a well.
Dependencies are inferred from the claim text.