Baker Hughes Corporation

Christopher S Charles

Steven R Radford

Jeffrey B Lund

Robert A Laing

Matthew J Meiners

Mark E Morris

Matthew D Mumma

D Jay Clinkscales

W Gregory Presley

Mark William Dykstra

L Allen Sinor

Thomas John Gottschalk

Timothy King Marvel

Daniel E Ruff

James L Duggan

Sean K Berzas

David M Schnell

Douglas J Bobrosky

William Gregory Presley

Troy Richard Stuart

Wayne Lee Baker

Jennifer Ann Wells

Enhanced stabilization is provided for an eccentric reaming tool when a pilot borehole is undersized with respect to a following pilot stabilization pad (PSP). Alternatively, offset of a rotational axis of at least a portion of the assembly including the reaming tool is employed to accomplish stabilization of the reaming tool. In either case, a reamed diameter larger than a physical diameter of the reaming tool may be drilled. More specifically, an enlarged PSP relative to pilot bit diameter or PSP offset or even pilot bit offset is employed in order to engage a PSP with the wall of a pilot borehole of greater diameter than a physical diameter of the pilot bit. The PSP or pilot drill bit, or both, may be laterally offset, angularly offset, or a combination thereof in order to effect substantially continuous PSP contact with the pilot borehole wall.

Enhanced offset stabilization for eccentric reamers

A method and apparatus for reaming or enlarging a borehole with the ability to drill cement, cement float equipment, and debris out of a casing without substantial damage to the casing interior or the reaming apparatus. The reaming apparatus also provides enhanced protection from contact with the casing wall for selected structural features and elements thereof.

Reaming apparatus and method with enhanced structural protection

A method and apparatus for reaming or enlarging a borehole with the ability to drill cement, cement float equipment, and debris out of a casing without substantial damage to the casing interior or the reaming apparatus.

Reaming apparatus and method with ability to drill out cement and float equipment in casing

A drillbit with a flexible nozzle system is provided to address bit- and bottom-balling situations. In one embodiment, a given nozzle can have an mounting member which is oblong or another shape so as to be installable into different positions where, in one position, the bit-balling problem is addressed, while in the other, the bottom-balling problem is addressed. Other shapes that provide this flexibility can also be employed. The nozzle body can also be made with a symmetrical mount, with the outlet askew such that the symmetrical mount, when placed in a strategically located nozzle opening, can address bit- or bottom-balling situations by a simple reversal of the orientation where multiple orientations are available for the base. Alternatively, in the area between adjacent cones, multiple nozzle installations can be provided to independently address the bit-balling and bottom-balling situations between adjacent cones. In any given bit, individual nozzles to address bit- or bottom-balling can be mounted between different pairs of cones so as to be able to address both problems in a bit body design that only provides for a single nozzle outlet between each of the cones.

Rock bit nozzle arrangement

Growing community of inventors

Houston, TX, United States of America

Christopher S Charles