High temperature packer element for well bores
AssigneeHalliburton Company
InventorAllen E. Harris
Life of this patent
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Abstract
This invention relates to packer element design for use in high temperature well bores. Packing material of asbestos fibers impregnated with a thermoplastic and interwoven with Inconel wire is employed in a center packer ring of triangular cross-section disposed between two facing series of frusto-conically shaped packer rings, which are backed by expandable metal packer shoes.
Claims20
In a pack-off device of the type having a mandrel and means to longitudinally compress a packer element disposed about said mandrel, a packer element comprising:
- a center packer ring having two oblique side faces;
- a first plurality of frusto-conical packer rings having substantially parallel oblique side faces and arranged adjacent said center packer ring;
- a second plurality of frusto-conical packer rings having substantially parallel oblique side faces and arranged adjacent said center packer ring;
- said oblique side faces of said first and second plurality of frusto-conical packer rings having an angle of radial inclination greater than the angle of radial inclination of said center packer ring side faces.
A packer element for use on a mandrel of a pack-off device of the type which effects a seal across a well bore through longitudinal compression of said element, comprising:
- a center packer ring having two oblique non-parallel side faces;
- a first plurality of frusto-conical packer rings possessing oblique, substantially parallel side faces and abutting said center packer ring;
- a second plurality of frusto-conical packer rings possessing oblique, substantially parallel side faces and abutting said packer ring;
- said side faces of said first and second pluralities of frusto-conical packer rings being inclined at a greater radial angle than said non-parallel side faces of said center packer ring.
Dependencies are inferred from the claim text.