Patent ID: 8881804

Claim:
A sand control screen assembly selectively positionable within a wellbore, the sand control screen assembly comprising: a pipe comprising an internal flow path disposed therethrough; a fluid collection subassembly disposed externally to the pipe and in fluid communication with the internal flow path, wherein the fluid collection subassembly is configured to prevent at least some particulate matter from entering the internal flow path; a filter medium disposed in a fluid path on an exterior of the fluid collection subassembly, wherein the filter medium comprises longitudinally overlapping screen elements; a biasing mechanism disposed between the fluid collection subassembly and the pipe, wherein the biasing mechanism is configured to bias the fluid collection subassembly towards a wall of the wellbore; and a retaining mechanism configured to release the biasing mechanism in response to a trigger, wherein the retaining mechanism comprises one or more coating layers disposed over at least a portion of a surface of the retaining mechanism, wherein the one or more coating layers are configured to isolate at least the portion of the surface of the retaining mechanism from a surrounding fluid until the one or more coating layers are removed.