Positioning stabilizer assembly using shoulder ring

A drilling tool, comprising:

• a housing having one or more external splines disposed along an outer surface of the housing;
• a rotatable shaft disposed inside the housing, the shaft having a downhole end portion configured to be coupled to a drill bit;
• a stabilizer assembly movably coupled to the housing;
• one or more spacers disposed around the housing between the shoulder ring and the stabilizer assembly;
• and
• a shoulder ring disposed around the housing and configured (i) to prevent uphole movement of the stabilizer assembly when one or more internal splines of the shoulder ring are engaged with the one or more external splines and (ii) to allow uphole movement of the stabilizer assembly when the one or more internal splines are disengaged from the one or more external splines.

An apparatus for use with a drilling tool, comprising:

• a shoulder ring having one or more internal splines configured to be engaged with one or more external splines disposed around a housing of a drilling tool;
• and
• a blocking ring configured to be engaged with the shoulder ring, wherein the blocking ring comprises:
• a downhole ring configured to abut a downhole end portion of the shoulder ring, wherein each of the downhole ring and the shoulder ring has an inner diameter greater than an outer diameter of the one or more external splines;
• and
• one or more spline arms extending in an axial direction from the downhole ring, wherein an inner diameter of the spline arms is less than an inner diameter of the downhole ring.