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US 2014/0209325 A1Published application
Exandable wedge slip for anchoring downhole tools
AssigneeHalliburton Energy Services, Inc.
InventorsDavid Allen Dockweiler, Anthony Valencia
Life of this patent
Estimating the term…
Abstract
An expansion apparatus for anchoring a downhole tool in a well is provided. The expansion apparatus has a wedge, an expansion wedge and a slip ring. The wedge and expansion wedge interact so as to radially expand wedge segments of the expansion wedge. The slip ring and expansion wedge interact so as to radially expand the slip ring to grippingly engage the wellbore or casing.
Claims18
An expansion apparatus for a downhole tool, comprising:
- a wedge having an inclined outer wall wherein said wedge is coaxial to a central axis;
- an expandable wedge having wedge segments comprising an inner surface and an inclined outer surface, said wedge segments being disposed about said central axis wherein said wedge segments move radially outward by interaction with said wedge;
- and
- a plurality of slip segments disposed about said central axis and expandable radially outward by interaction with said expandable wedge.
1 more element
An expansion apparatus for a downhole tool, comprising:
- a wedge having a frustoconical wall that is coaxial to a central axis;
- an expandable wedge having:
- a plurality of frangibly connected wedge segments, said wedge segments comprising an inner surface and an inclined outer surface, said wedge segments being disposed about said central axis wherein said wedge segments move radially outward when there is axial movement of said wedge relative to said expandable wedge along said central axis such that said inner surface of said wedge segments is moved along said frustoconical wall of said wedge;
- and
- a collar piece having an inclined portion and a plurality of axially extending members extending axially from a first end of said inclined portion and wherein said wedge segments are located between said axially extending members;
- and
- a plurality of frangibly connected slip segments disposed about said central axis wherein each of said slip segments of said plurality of slip segments has an outer surface and an inner surface and each slip segment moves radially outward when there is axial movement of said slip segment relative to said wedge segments such that said inner surface of said slip segment is moved along said inclined outer surface of at least one of said wedge segments.
4 more elements
A downhole tool for use in a well comprising:
- a mandrel;
- a wedge disposed about said mandrel, said wedge being coaxial with said mandrel to a central axis;
- an expandable wedge having wedge segments disposed about said mandrel and, when said downhole tool moves from an unset position to a set position, said wedge segments expand radially outwardly by interaction with said wedge;
- and
- a slip ring disposed about said mandrel and, when said downhole tool moves from an unset position to a set position, said slip ring expands radially outward by interaction with said expandable wedge so that said slip ring grippingly engages said well.
2 more elements
A method of operating a wellbore servicing tool, comprising:
- longitudinally compressing an expansion device along a central axis such that a wedge, a plurality of expandable wedge segments and a slip ring comprising a plurality of slip segments wherein there is relative axial movement of said wedge, expandable wedge and slip ring towards each other during said longitudinal compression;
- and
- upon sufficient compression, expanding said plurality of expandable wedge segments radially outward by interaction of said wedge with said plurality of expandable wedge segments and expanding said plurality of slip segments radially outward by interaction of said slip ring with said plurality of expandable wedge segments.
Dependencies are inferred from the claim text.