Deburring mill tool for wellbore cleaning

A method of operating a wellbore tool, comprising:

• lowering the tool into a tubular using a work string;
• rotating a cutting assembly of the tool to remove irregularities from an inner surface of the tubular, wherein the cutting assembly comprises a mandrel, a piston, and a cutting member;
• actuating the cutting member into at least one of a retracted position and an extended position using the piston while preventing longitudinal movement of the cutting member relative to the mandrel, wherein the piston is disposed external to the mandrel, and wherein the mandrel is disposed through the piston;
• and
• using a locking member to prevent movement of the piston in an opposite direction after the piston moves in a first direction to actuate the cutting member into at least one of the retracted position and the extended position.

A wellbore tool, comprising:

• a top sub;
• and
• a cutting assembly comprising:
• a mandrel in fluid communication with the top sub;
• a sleeve coupled to the mandrel;
• and
• a cutting member rotationally coupled to the top sub when the sleeve is in a first position, wherein the cutting member is rotationally decoupled from the top sub and the mandrel is rotationally coupled with the top sub which rotates when the sleeve is in a second position.

A method of operating a wellbore tool, comprising:

• lowering the tool into a tubular using a work string;
• rotating a cutting assembly of the tool to remove irregularities from an inner surface of the tubular, wherein the cutting assembly comprises a mandrel, a sleeve, and a cutting member, and wherein the cutting member is rotationally coupled to the mandrel and the mandrel is rotationally coupled to the work string;
• rotationally decoupling the cutting member from the mandrel using the sleeve while the mandrel remains rotationally coupled to the work string;
• and rotating the work string while the cutting member is rotationally decoupled from the mandrel.

A wellbore tool locking assembly, comprising:

• a housing having a groove in an outside wall thereof;
• a piston movable relative to the housing;
• and
• a locking element coupled to an outside surface of the piston, wherein the piston is movable in one direction from a first position where the locking element is disposed in the groove to a second position where the locking element is removed from the groove, and wherein the locking element prevents movement of the piston in an opposite direction when the locking element is removed from the groove.

A wellbore tool, comprising:

• a top sub;
• a cutting assembly comprising:
• a mandrel in fluid communication with the top sub;
• a first piston and a second piston, wherein the mandrel is disposed through the first piston and second piston;
• and
• a cutting member selectively movable into at least one of a retracted position and an extended position by at least one of simultaneously engaging and disengaging with the first piston and the second piston, wherein the first piston moves in a first axial direction and engages one side of the cutting member, and the second piston moves in a second axial direction that is opposite the first axial direction and engages an opposite side of the cutting member;
• and
• a bottom sub operable to close fluid flow through the wellbore tool.