Expandable wedge slip for anchoring downhole tools

摘要

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.

主权项

1. 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 comprising a collar piece and a plurality of wedge segments, wherein the collar piece comprises a plurality of openings with each opening housing one of said wedge segments, wherein each of said wedge segments comprise an inner surface and an inclined outer surface, said wedge segment being disposed about said central axis, wherein said expandable wedge has an unset position where said wedge segments are positioned at least partially internally to the collar piece, said expandable wedge has a set position where said wedge segments are moved radially outward relative to said collar piece through said plurality of openings in said collar piece, and said expandable wedge is moved from said unset position to said set position by interaction with said wedge; a plurality of slip segments disposed about said central axis and expandable radially outward by interaction with said expandable wedge.