Casing string rotation systems and methods

A well system comprising a running tool, wherein the running tool comprises:

• a tool body configured to be secured to a wellhead component, wherein the tool body defines a tool bore and comprises an external bearing groove on an outer surface;
• a tool sleeve configured to be disposed circumferentially around the tool body, wherein the tool sleeve comprises an internal bearing groove on an inner surface that is configured to be radially aligned with the external bearing groove on the tool body;
• and
• a tool bearing assembly, wherein the tool bearing assembly comprises a plurality of bearings configured to be disposed within the internal bearing groove on the tool sleeve and within the external bearing groove on the tool body.

A well system comprising a casing hanger, wherein the casing hanger comprises:

• a hanger body that defines a hanger bore, wherein the hanger body is configured to be secured to a casing string to facilitate suspending the casing string within a wellbore;
• a hanger sleeve secured circumferentially around the hanger body, wherein the hanger sleeve is configured to land within a wellhead housing;
• and
• a hanger bearing assembly disposed axially between the hanger body and the hanger sleeve to facilitate rotating the hanger body relative to the hanger sleeve as well as transferring axial force between the hanger body and the hanger sleeve;
• wherein an axial upper end of the hanger body comprises a securement notch configured to matingly interlock with a securement tab on a running tool to enable the running tool to:
• rotate the hanger body of the casing hanger by rotating in a first direction;
• and
• disconnect from the casing hanger by rotating in a second direction.