Definition(s)
Wear Bushing
Bushing to be installed in the rotary table, to provide a smooth lateral support to the workover riser at drill floor level.
Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Wear Bushing
Retrievable cylindrical device that protects the internal surfaces of wellhead equipment and the top of the last casing suspended.
Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards
Wear Bushing
Bore protector that also protects the casing hanger below it.
Source: API SPEC 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Upstream Segment, Second Edition May 2011 (Errata September 2011). Global Standards