Stent springs for repairing pipes

A stent spring for repairing a pipe comprising:

• a substantially tubular mesh structure defining a first structure end and a second structure end opposite the first structure end, the substantially tubular mesh structure comprising a plurality of strands comprising a spring material, wherein the stent spring is expandable and compressible between an expanded configuration and a compressed configuration;
• and
• a void extending through the substantially tubular mesh structure from the first structure end to the second structure end, a central axis extending through a center of the void;
• wherein the plurality of strands comprises a plurality of annular rows of contiguous V-shaped strands, each annular row connected to each adjacent annular row by a connecting strand of the plurality of strands.

A stent spring for repairing a pipe comprising:

• a substantially tubular mesh structure defining a first structure end and a second structure end opposite the first structure end, the substantially tubular mesh structure comprising a plurality of strands comprising a spring material, wherein the stent spring is expandable and compressible between an expanded configuration and a compressed configuration;
• and
• a void extending through the substantially tubular mesh structure from the first structure end to the second structure end, a central axis extending through a center of the void;
• wherein the plurality of strands comprises a plurality of annular rows of contiguous quadrilateral strands, each annular row connected to each adjacent annular row by a connecting strand of the plurality of strands.