A bearing assembly, comprising: a cylindrical housing having a longitudinal axis, a generally cylindrical bore, and a cylindrical radially inner surface including a first annular recess defining an upper shoulder and a lower shoulder, wherein the upper shoulder of the housing and the lower shoulder of the housing are axially spaced apart; a generally cylindrical mandrel rotatably disposed within the housing, wherein the mandrel has a cylindrical radially outer surface including a second annular recess defining an upper shoulder and a lower shoulder, wherein the upper shoulder of the mandrel and the lower shoulder of the mandrel are axially spaced apart; wherein the mandrel is longitudinally moveable within the housing between: a first position with the upper shoulder of the mandrel positioned below the upper shoulder of the housing and the lower shoulder of the mandrel positioned below the lower shoulder of the housing; and a second position with the upper shoulder of the mandrel positioned above the upper shoulder of the housing and the lower shoulder of the mandrel positioned above the lower shoulder of the housing; wherein the first annular recess and the second annular recess define an annular containment chamber; an annular thrust bearing disposed in the annular containment chamber, wherein the thrust bearing has an annular centerline oriented parallel to the longitudinal axis; wherein the upper shoulder of the housing and the lower shoulder of the mandrel are planar, each being disposed in a plane oriented perpendicular to the longitudinal axis; wherein the upper shoulder of the housing is radially centered relative to the centerline of the thrust bearing; wherein the lower shoulder of the mandrel is radially centered relative to the centerline of the thrust bearing. a cylindrical housing having a longitudinal axis, a generally cylindrical bore, and a cylindrical radially inner surface including a first annular recess defining an upper shoulder and a lower shoulder, wherein the upper shoulder of the housing and the lower shoulder of the housing are axially spaced apart; a generally cylindrical mandrel rotatably disposed within the housing, wherein the mandrel has a cylindrical radially outer surface including a second annular recess defining an upper shoulder and a lower shoulder, wherein the upper shoulder of the mandrel and the lower shoulder of the mandrel are axially spaced apart; wherein the mandrel is longitudinally moveable within the housing between: a first position with the upper shoulder of the mandrel positioned below the upper shoulder of the housing and the lower shoulder of the mandrel positioned below the lower shoulder of the housing; and a second position with the upper shoulder of the mandrel positioned above the upper shoulder of the housing and the lower shoulder of the mandrel positioned above the lower shoulder of the housing; a first position with the upper shoulder of the mandrel positioned below the upper shoulder of the housing and the lower shoulder of the mandrel positioned below the lower shoulder of the housing; and a second position with the upper shoulder of the mandrel positioned above the upper shoulder of the housing and the lower shoulder of the mandrel positioned above the lower shoulder of the housing; wherein the first annular recess and the second annular recess define an annular containment chamber; an annular thrust bearing disposed in the annular containment chamber, wherein the thrust bearing has an annular centerline oriented parallel to the longitudinal axis; wherein the upper shoulder of the housing and the lower shoulder of the mandrel are planar, each being disposed in a plane oriented perpendicular to the longitudinal axis; wherein the upper shoulder of the housing is radially centered relative to the centerline of the thrust bearing; wherein the lower shoulder of the mandrel is radially centered relative to the centerline of the thrust bearing.