An apparatus for reducing rotational friction, shocks and vibrations associated with bearing a rotatable shaft within a subterranean bore, comprising and characterized by: a hydrodynamic bearing (1, 12) disposed about said rotatable shaft and within a wall of said subterranean bore, wherein said hydrodynamic bearing comprises at least one periphery arced wall comprising a fluid discharge port, the at least one periphery arced wall radially extending from and arranged about a circumference of an outer wall of a conduit shaft housing which is disposed about at least one inner wall (6, 13) adjacent to at least one associated hydrodynamic profiled wall that is rotatable by or about said rotatable shaft and within said conduit shaft housing to displace fluid axially along at least one other of said walls using rotation of said at least one associated hydrodynamic profiled wall, wherein frictional engagements of said fluid, said at least one associated hydrodynamic profiled wall, said at least one inner wall (6, 13) and said at least one periphery arced wall, disposed between said rotatable shaft and said wall of said subterranean bore, are used to anchor at least one of said walls relative to said at least one associated hydrodynamic profiled wall, forming an anchor relative to said rotation of said at least one associated hydrodynamic profiled wall by said rotatable shaft, to force said fluid between said at least one associated hydrodynamic profiled wall and said anchor, to form a set of at least two of said walls with fluid flow between said at least two of said walls, to form a pressurized cushion bearing fluidly communicated to and from said at least two of said walls to, in use, lubricate and dampen said rotational shocks and vibrations using said pressurized cushion bearing and a shearing of said frictional engagements that bear rotation of said rotatable shaft between said at least two of said walls within said subterranean bore. a hydrodynamic bearing (1, 12) disposed about said rotatable shaft and within a wall of said subterranean bore, wherein said hydrodynamic bearing comprises at least one periphery arced wall comprising a fluid discharge port, the at least one periphery arced wall radially extending from and arranged about a circumference of an outer wall of a conduit shaft housing which is disposed about at least one inner wall (6, 13) adjacent to at least one associated hydrodynamic profiled wall that is rotatable by or about said rotatable shaft and within said conduit shaft housing to displace fluid axially along at least one other of said walls using rotation of said at least one associated hydrodynamic profiled wall, wherein frictional engagements of said fluid, said at least one associated hydrodynamic profiled wall, said at least one inner wall (6, 13) and said at least one periphery arced wall, disposed between said rotatable shaft and said wall of said subterranean bore, are used to anchor at least one of said walls relative to said at least one associated hydrodynamic profiled wall, forming an anchor relative to said rotation of said at least one associated hydrodynamic profiled wall by said rotatable shaft, to force said fluid between said at least one associated hydrodynamic profiled wall and said anchor, to form a set of at least two of said walls with fluid flow between said at least two of said walls, to form a pressurized cushion bearing fluidly communicated to and from said at least two of said walls to, in use, lubricate and dampen said rotational shocks and vibrations using said pressurized cushion bearing and a shearing of said frictional engagements that bear rotation of said rotatable shaft between said at least two of said walls within said subterranean bore.