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

摘要

Expandable apparatus for use in subterranean boreholes include at least one member configured to move between a retracted position and an extended position. Components of the expandable apparatus may include at least one surface for removing debris proximate to the tubular body. Components of the expandable apparatus may be configured to enable the expandable apparatus to increase a diameter of a subterranean borehole by greater than twenty percent. Components of the expandable apparatus may be configured to restrict fluid flow to nozzle assemblies. The expandable apparatus may include a protect sleeve having a push sleeve disposed therein. Methods of operating an expandable apparatus may include removing debris with a surface of the expandable apparatus. Methods of operating an expandable apparatus may also include selectively flowing fluid to nozzle assemblies.

主权项

1. 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 yoke 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 apex is positioned on the yoke at the central portion spaced from any edge portions of a downhole surface of the yoke.