Class / Patent application number | Description | Number of patent applications / Date published |
175408000 | With bit guide or bore wall compacting device | 9 |
20080230278 | Fixed cutter drill bit for abrasive applications - The invention provides a fixed cutter drill bit for drilling through unconsolidated, highly abrasive formations. The bit includes a bit body having a cutting face and a side portion. The bit body comprising carbide matrix material. A plurality of blades azimuthally spaced about the cutting face and a plurality of cutters disposed along the blades. At least one gage pad is disposed along a side of the bit body and includes wear resistant gage elements formed of a material more wear resistant than the matrix material forming a portion of the gage pad. The wear resistant elements have a rounded surface and are embedded in gage pad material proximal a leading edge of the gage pad to provide a rounded wear-resistant edge or surface proximal the leading edge. | 09-25-2008 |
20090032309 | SLEEVE STRUCTURES FOR EARTH-BORING TOOLS, TOOLS INCLUDING SLEEVE STRUCTURES AND METHODS OF FORMING SUCH TOOLS - Earth-boring tools comprise a bit body comprising a face and a plurality of blades extending radially outward over the face and forming gage regions. A shank is coupled to the bit body and includes a threaded portion for connecting to a drill string. A sleeve structure is positioned adjacent to the bit body and surrounds a portion of the shank, the sleeve structure extending from adjacent the bit body to proximate the threaded portion of the shank. An outer surface of the sleeve structure comprises a plurality of circumferentially spaced gage pads extending thereover and may comprise a plurality of breaker flats. | 02-05-2009 |
20100108397 | EARTH-BORING TOOLS HAVING THREADS FOR AFFIXING A BODY AND SHANK TOGETHER AND METHODS OF MANUFACTURE AND USE OF SAME - Earth-boring tools comprise a shank comprising a distal connector including a set of threads thereon and a bit body comprising a shank connector, also comprising at least one set of threads thereon. The set of threads on the distal connector and the at least one set of threads on the shank connector are at least substantially bound together. Methods of forming such earth-boring tools are also disclosed, as well as methods of securing a bit body of an earth-boring tool to a shank. | 05-06-2010 |
20110155473 | STABILIZING SYSTEM AND METHODS FOR A DRILL BIT - A drill bit stabilizing system comprising a body member having an axis and at least one recess formed in the body member housing at least one stabilizing member when in a first retracted position. The stabilizing member is positionable along a diagonal angle with the axis to a second extended operating position which extends downward and outward relative to the main body to selectively engage the surface of a pilot bore hole wall during a drilling operation so as to stabilize an under gauge drill bit used in association with the stabilizing system. The body member further comprises at least one fixed stabilizing surface positioned in an axially spaced relationship to the at least one moveable stabilizing member. The body member further comprises a gauge cutter positioned above the moveable stabilizing member and below the fixed stabilizing surface to expand the pilot hole to the final gauge. | 06-30-2011 |
20120111640 | DOWNHOLE DRILLING ASSEMBLY - A downhole stabiliser ( | 05-10-2012 |
20130292185 | FIXED CUTTER DRILL BIT WITH ROTATING CUTTER DISC - A fixed cutter drill bit that includes one or more integrally-mounted rotating disc with cutters around the circumference of the disc. Each disc is mounted to bearings to handle the torque generated and the weight on bit required to cut the formation. The mounting angle of the disc generates a torque causing the disc to rotate. As the disc rotates, new cutters are presented to the formation. The discs may vary in size, mounting location and number so as to cover entire bladed or just a certain portions of blades. The exposure of the disc could also be set to enable it to rotate while under load, e.g., the cutters on the outside of the bit may contact the formation while the inner half of the disc is protected by a fixed blade. | 11-07-2013 |
20130292186 | GAGE CUTTER PROTECTION FOR DRILLING BITS - A downhole cutting tool may include a tool body, a plurality of blades extending azimuthally from the tool body comprising a cone region, a shoulder region, and a gage region, at least one cutting element disposed along the cone region and the shoulder region of the blade, and at least one gage cutting element disposed along the gage region of the blade wherein the at least one gage cutting element has a negative backrake ranging from greater than 70 to about 85 degrees. | 11-07-2013 |
20130292187 | ROTARY DRILL BITS INCLUDING BEARING BLOCKS - A bearing block is provided that may be used with a drag bit body or frame to limit depth of cut of cutters on a bit. The bearing block is designed so that it may be interchangeably replaced or repaired without necessitating alteration to a standardized bit frame. The interchangeable bearing block may be used to provide a target depth of cut (TDOC) and/or a selected contact or rubbing area to support weight on bit and limit depth of cut (DOC) for improving drilling performance of a bit. The interchangeable bearing block brings manufacturing selectability by providing a customizable product in terms of depth of cut selection and cutter penetration control for different formations, which is suitable for use with a common bit frame. A rotary drill bit assembly, a unitary cone insert bearing block for a drill bit, and a bit frame are also provided. | 11-07-2013 |
20190145189 | EARTH-BORING TOOLS HAVING MULTIPLE GAGE PAD LENGTHS AND RELATED METHODS | 05-16-2019 |