Patent ID: 6749018
Filing Date: 2004-06-15
Classification: E21B

Abstract:
A downhole assembly for a well, comprising in combination:a wellhead housing having an axial bore with a casing hanger landed therein and a seal assembly therebetween; a wear bushing having an axial bore with an internal recess, a flexible ring located in the recess, and a radially movable key; a tool having an outer profile; wherein the wear bushing is secured to the tool by rotating the tool and wear bushing relative to each other to align the outer profile with the key, and axially moving the tool and wear bushing relative to each other such that the tool is located in the bore of the wear bushing to engage the outer profile with the flexible ring and the key, so that the wear bushing can be landed on the casing hanger; and wherein the wear bushing is released from the tool by rotating the tool relative to the wear bushing to disengage the outer profile from the key, and lowering the tool relative to the wear bushing to disengage the outer profile from the flexible ring.