Expandable liner hanger with high axial load capacity

A radially expandable downhole tool for bearing axial loads upon radial expansion into gripping and sealing engagement with a downhole tubular positioned in a subterranean wellbore, the tool comprising:

• a radially expandable tubular defining an interior passageway and an exterior surface;
• an axial load bearing assembly positioned on the exterior surface of the radially expandable tubular and having:
• a gripping sub-assembly for, after the radial expansion, grippingly engaging the downhole tubular and bearing axial loads placed on the downhole tool, the gripping sub-assembly having a plurality of radially extending ridges, each ridge having at least one hardened tooth for penetrating into the downhole tubular and a plurality of longitudinally extending notches formed in the ridge and/or the at least one hardened tooth to relieve stress imparted by the radial expansion;
• and
• a sealing sub-assembly for, after the radial expansion, sealingly engaging the downhole tubular and sealing the annulus defined between the downhole tubular and the radially expandable downhole tool.