The present invention provides an assembly, system, and method for an epicyclic washpipe swivel cartridge that can includes a gear reduction assembly with a sealed lubrication enclosure that can operate independent of roller bearings. The cartridge includes a pair of clamshell clamps to insert the cartridge in position without requiring dislocation of the mating assemblies. The system can further include a hydraulic port for efficient activation of the seals before placing high on a top drive of an oil derrick or other remote location.