Tools for use in subterranean boreholes having expandable members and related methods

An expandable apparatus for use in a subterranean borehole, comprising:

• a tubular body having a longitudinal bore and at least one opening in a wall of the tubular body;
• at least one member positioned within the at least one opening in the wall of the tubular body, the at least one member configured to move between a retracted position and an extended position;
• and
• a yoke coupled to the at least one member, at least one of the yoke and the tubular body comprising at least one surface having a central portion comprising an apex for removing debris proximate to the at least one opening in the wall of the tubular body, wherein the at least one surface having the apex for removing debris comprises a debris removal element coupled to a surface of at least one of the yoke and the tubular body.

A method for operating an expandable apparatus for use in a subterranean borehole, comprising:

• moving at least one member of the expandable apparatus coupled to a yoke from a retracted position to an extended position against a biasing force of a spring disposed in the expandable apparatus to compress the spring;
• forcing the at least one member and the yoke from the extended position to the retracted position with the biasing force of the spring;
• and
• removing debris from an exterior of the expandable apparatus proximate to the at least one member with at least one surface of the yoke having a central portion comprising an apex and with the biasing force of the spring comprising contacting the debris with the apex of the at least one surface of the yoke that is spaced from any edge portions of a downhole surface of the yoke.

An expandable apparatus for use in a subterranean borehole, comprising:

• a tubular body having a longitudinal bore and at least one opening in a wall of the tubular body;
• at least one member positioned within the at least one opening in the wall of the tubular body, the at least one member configured to move between a retracted position and an extended position;
• and
• a yoke coupled to the at least one member, the tubular body comprising at least one surface having a central portion comprising an apex for removing debris proximate to the at least one opening in the wall of the tubular body, wherein the at least one surface is positioned on the tubular body to extend from the tubular body in an uphole direction when the expandable apparatus is deployed in a subterranean wellbore and terminate at the apex.

A method for operating an expandable apparatus for use in a subterranean borehole, comprising:

• moving at least one member of the expandable apparatus coupled to a yoke from a retracted position to an extended position;
• forcing the at least one member and the yoke from the extended position to the retracted position;
• contacting the debris with an apex formed on a central portion of an arm of the yoke proximate a coupling between the arm and the at least one member;
• and
• removing debris from an exterior of the expandable apparatus proximate to the at least one member with at least one protruding surface of at least one of the yoke and the tubular body.