Completion systems and remediation systems for oil, gas and water wells, namely, downhole completion systems and remediation systems, including, packer apparatus for use in drilling bore holes and packer apparatus for well drilling operations; such apparatus including inflatable packers such as inflatable packers for use in hydraulic fracturing or hydraulic enhancement of wells; fracturing systems, including, packers used to place fluids in sections of a bore hole or well to stimulate production; apparatus for use in mining, including fracturing systems, including packers used to place fluids in sections of a bore hole or well to precondition rock formations for block caving mining operations; hydraulic machines and apparatus, including fracturing systems, including, packers used to place fluids in sections of a bore hole or well to apply stress to geological structures to allow measurement of stress fields