Baker Hughes Corporation

Mark R Kizziar

Steven R Radford

Anton F Zahradnik

Mark E Morris

Les T Shale

Scott Shiqiang Shu

Mark A Jenkins

Scott Shiquiang Shu

Expandable reamer tools include an outer body, a fluid passageway extending through the outer body, and at least one blade configured to slide relative to the outer body between a retracted position and an expanded position. In some embodiments, the tools may include a formation-engaging surface comprising a gage area. In other embodiments, the tools may include a radially recessed area extending from a back edge of the formation-engaging surface. Methods for removing such expandable reamer tools from a borehole are also disclosed.

Expandable reamer tools

An expandable reamer apparatus and stabilizer sub having at least one rib thereon attached thereto for drilling a subterranean formation.

Expandable reamer apparatus including stabilizers

Expandable earth-boring wellbore reamers and related methods

Stabilizer subs for use with expandable reamer apparatus, expandable reamer apparatus including stabilizer subs and related methods

Expandable reamer tools include an outer body, a fluid passageway extending through the outer body, and at least one blade configured to slide relative to the outer body between a retracted position and an expanded position in a direction oriented at an acute angle of less than ninety degrees (90&#xb0;) to a longitudinal axis of the outer body. In some embodiments, the tools may include a moveable inner sleeve member configured to selectively allow hydraulic fluid pressure within the fluid passageway to act directly on the at least one blade. Methods for enlarging a borehole using such expandable reamer tools and methods for removing such expandable reamer tools from a borehole are also disclosed.

Expandable reamers for earth-boring applications and methods of using the same

An expandable reamer apparatus and methods for reaming a borehole are disclosed, including at least one laterally movable blade carried by a tubular body selectively positioned at an inward position and an expanded position. The at least one laterally movable blade, held inwardly by at least one blade-biasing element, may be forced outwardly by drilling fluid selectively allowed to communicate therewith or by at least one intermediate piston element. For example, an actuation sleeve may allow communication of drilling fluid with the at least one laterally movable blade in response to an actuation device being deployed within the drilling fluid. Alternatively, a chamber in communication with an intermediate piston element in structural communication with the at least one laterally movable blade may be pressurized by way of a movable sleeve, a downhole turbine, or a pump.

Growing community of inventors

Lafayette, LA, United States of America

Mark R Kizziar