公开(公告)号：GB2387400B

公开(公告)日：2005-11-30

申请号：GB0305755

申请日：2003-03-13

Applicant: BAKER HUGHES INC

Inventor： PRESLEY W GREGORY ,  CHARLES CHRISTOPHER S ,  RADFORD STEVEN R ,  MEINERS MATTHEW J ,  MORRIS MARK E ,  CLINKSCALES D JAY ,  LUND JEFFREY B ,  LAING ROBERT A ,  MUMMA MATTHEW D

IPC: E21B10/16 ,  E21B10/26 ,  E21B10/54 ,  E21B10/55 ,  E21B10/56 ,  E21B10/567

Abstract: 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.

公开(公告)号：GB2386387B

公开(公告)日：2005-08-17

申请号：GB0304074

申请日：2003-02-24

Applicant: BAKER HUGHES INC

Inventor： LUND JEFFREY B ,  MEINERS MATTHEW J ,  RADFORD STEVEN R ,  LAING ROBERT A ,  MUMMA MATTHEW D ,  PRESLEY W GREGORY ,  CHARLES CHRISTOPHER ,  CLINKSCALES D JAY

IPC: E21B10/26

Abstract: 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.

公开(公告)号：GB2387400A

公开(公告)日：2003-10-15

申请号：GB0305755

申请日：2003-03-13

Applicant: BAKER HUGHES INC

Inventor： PRESLEY W GREGORY ,  CHARLES CHRISTOPHER S ,  RADFORD STEVEN R ,  MEINERS MATTHEW J ,  MORRIS MARK E ,  CLINKSCALES D JAY ,  LUND JEFFREY B ,  LAING ROBERT A ,  MUMMA MATTHEW D

IPC: E21B10/16 ,  E21B10/26 ,  E21B10/54 ,  E21B10/55 ,  E21B10/56 ,  E21B10/567

Abstract: A reamer apparatus has a number of reaming blades (110, 112, 114, 116, 118) where at least one blade (118) exhibits a radially outward bearing element (140) placed for rotation substantially coincident with the drill diameter (170) and for contacting an interior wall of a casing during rotation, such that the blade (118) rides on the bearing element (140). The bearing element (140) may be in the form of an ovoid WC insert.

公开(公告)号：GB2386387A

公开(公告)日：2003-09-17

申请号：GB0304074

申请日：2003-02-24

Applicant: BAKER HUGHES INC

Inventor： LUND JEFFREY B ,  MEINERS MATTHEW J ,  RADFORD STEVEN R ,  LAING ROBERT A ,  MUMMA MATTHEW D ,  PRESLEY W GREGORY ,  CHARLES CHRISTOPHER ,  CLINKSCALES D JAY

IPC: E21B10/26

Abstract: Enhanced stability in a borehole reaming assembly where a pilot drill bit 250 defines a rotational diameter during drilling larger than the pilot drill bit physical diameter is provided by configuring the pilot drill bit 250 and a pilot stabilization pad 218 so that the rotational diameter of the pilot drill bit and a rotational diameter of the pilot stabilization pad are substantially the same during operation. The equalizing of the rotational diameters may be effected either by making the physical diameter of the pilot stabilization pad larger than that of the pilot drill bit, by offsetting the pilot drill bit centroidal rotational axis with respect to the reaming axis, or by offsetting the pilot stabilization pad centroidal rotational axis with respect to the reaming axis.