Steep pitch helix packer
OwnerDale I. Kunz, Maurice W. Slack +1inventors
InventorsDale I. Kunz, Maurice W. Slack, Trent M. V. Kaiser
Life of this patent
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Abstract
A seal element is provided which comprises inner and outer, concentric, radially spaced apart, tubular helical cages. Each cage is formed by a plurality of helically parallel steel coils joined at their upper and lower ends by integral sleeves. A nitrite bladder is positioned between the cages. The seal element can be expanded by supporting its base and applying compressive load.
Claims4
A radially expandable seal element for bridging an annular clearance separating the seal element from a confining wall, comprising:
- a cylindrical cage having a side wall formed by a plurality of structural, coaxial, helically parallel coils having ends and side edges;
- and
- elastomeric means for sealing the side edges of the coils to provide pressure containment across the cage side wall.
A radially expandable seal element for bridging an annular clearance separating the seal element from a confining wall, comprising:
- inner and outer cylindrical cages, each cage having a side wall formed by a plurality of structural, coaxial, helically parallel coils having ends and side edges, and elastomeric means between the cages for sealing the side edges of the coils to provide pressure containment across the cage side wall.
Dependencies are inferred from the claim text.