| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 175412000 | Plural separable cutter elements | 14 |
| 20090308664 | Drill bit with replaceable blade members - A drill bit for rotary drilling a well bore of a subterranean formation which has replaceable blades which overlap and interlock with each other and have retention means on more than one axis. The replaceable blades may have cutters with enhanced retention by brazing ring grooves and the body may be flared at its bottom to better retain the blades and cutters. | 12-17-2009 |
| 20110024199 | Seal Ring With Auxiliary Ring for Earth-Boring Bit - An elastomeric seal ring is located between each bearing pin and each cone of an earth-boring bit. An auxiliary ring or band is imbedded within an annular recess formed in the inner diameter of the seal ring. A portion of the inner diameter of the seal ring as well as the auxiliary ring are in dynamic contact with the bearing pin. The auxiliary ring has a geometric feature that enhances radial flexibility but prevents it from sealing. The geometric feature may be a transverse cut, notches in either the inner or outer diameters, or holes extending between the sides of the auxiliary ring. The auxiliary ring has lubricating properties. | 02-03-2011 |
| 20110079445 | Drill Head for Deep-Hole Drilling - Provided is a drill head for deep-hole drilling which does not generate such a disc that clogs a cutting chip discharge port when a head main body of the drill head penetrates a work material. The drill head is mounted with a central cutting blade tip | 04-07-2011 |
| 20120000712 | CUTTER HEAD FOR DREDGING GROUND AND USE OF THIS CUTTER HEAD FOR DREDGING GROUND - The invention relates to a cutter head ( | 01-05-2012 |
| 20150075875 | MULTILEVEL FORCE BALANCED DOWNHOLE DRILLING TOOLS AND METHODS - Various downhole drilling tools designed and manufactured at least in part on evaluating respective forces acting on respective groups and sets of cutting elements during simulated engagement with the downhole end of a wellbore and drilling from a first downhole formation into a second downhole formation. Simulating forces acting on each cutting element as the cutting element contacts a downhole formation may be used to force balance downhole drilling tools during transition drilling or non-uniform downhole drilling conditions. Multilevel force balanced downhole drilling tools may be designed using five respective simulations, cutter group level, neighbor cutter group level, cutter set level, group of N (N=3 or N=4) consecutive cutters level and all cutters level. Various cutter layout procedures and algorithms may also be used to design multilevel force balanced downhole drilling tools which may drill faster with higher lateral stability, especially during downhole transiting drilling conditions. | 03-19-2015 |
| 175413000 | Independently attachable | 9 |
| 20090120693 | EARTH-BORING TOOLS ATTACHABLE TO A CASING STRING AND METHODS FOR THEIR MANUFACTURE - Casing bits include a crown having a substantially hollow interior. The bit crown has blades over a face portion thereof, the blades including a plurality of cutting elements attached thereto. The bit crown further includes a composite inlay positioned at least within the substantially hollow interior. Casing bits also include case hardened outer surfaces radially outside the drill-out region. Casing bits further include short-substrate cutting elements. Methods of forming a casing bit are also disclosed. | 05-14-2009 |
| 20090283334 | IMPREGNATED DRILL BIT - A drill bit that includes a body having a lower end face for engaging a rock formation, the end face having a plurality of raised ribs extending from the face of the bit body and separated by a plurality of channels therebetween; at least one of the plurality of ribs having a varying width along at least a portion of a rib height is disclosed. | 11-19-2009 |
| 20100175927 | EARTH DRILLING REAMER WITH REPLACEABLE BLADES - An earth drilling reamer has an elongated body having an outer surface and a plurality of blade mounting supports extending radially outwardly from the outer surface of the body. Each blade mounting support has a primary blade engagement positioned parallel to the outer surface and a leading blade angled from the outer surface to the primary blade engagement. A removable primary blade is detachably secured to the primary blade engagement. | 07-15-2010 |
| 20100218999 | DRILL BIT FOR EARTH BORING - Embodiments of the present invention include a drill bit configured for boring holes or wells into the earth. Embodiments include a drill bit comprised of a plurality of blades. Each of the plurality of blades includes one or more holes therethrough configured to receive a cutter that is secured therein. The cutters are secured in the hole with securing means that typically prevent the cutters from being removed when the drill bit is in use but allow the cutters to be removed from the holes when the drill bit is not in use. | 09-02-2010 |
| 20100252332 | DRILL BIT FOR EARTH BORING - Embodiments of the present invention include a drill bit configured for boring holes or wells into the earth. Embodiments include a drill bit comprised of a plurality of blades. A first plurality of the blades has cutting elements positioned substantially within the cone section of the drill bit. A second plurality of blades has cutting elements positioned substantially within the blade flank section and the blade shoulder section. Another embodiment of the first plurality of blades in which the blades end or truncate at a radial distance substantially less than the radial distance of the blade shoulder section from the center of the drill bit. | 10-07-2010 |
| 20110278072 | Central Cutting Region of a Drilling Head Assembly - In one aspect of the invention, a drilling assembly comprises a head located on a rotational axis of the assembly and comprises at least one head element. At least one blade extends distally from the head. A plurality of blade degradation elements are rotationally supported on the blade. Each degradation element comprises an attack angle that affects the penetration rate of each degradation element and a laterally offset angle that primarily affects the rotational rate of each degradation element within their holders. The drilling assembly comprises a central cutting region. The blade degradation elements within the central cutting region form an attack angle of 15 to 20 degrees with the rotational axis of the drilling assembly. | 11-17-2011 |
| 20120111641 | Detachable drill bit - The submitted design has same functions and usage as conventional drill heads. It consists of two parts, a solid and a recess truncated cone with 4 sets of troughs and teeth. The two parts are locked together with 4 slotted spring pins. The highly worn drill head can be detached and replaced even with one of different size or different type if needed. Such design feature is thus highly versatile and economical. | 05-10-2012 |
| 20150322726 | FORMATION-ENGAGING ASSEMBLIES, EARTH-BORING TOOLS INCLUDING SUCH ASSEMBLIES, AND RELATED METHODS - A formation-engaging assembly includes a formation-engaging structure holder with a side surface between a proximal end and a distal end, a receptacle in the distal end, and a lateral protrusion extending from a portion of the side surface of the formation-engaging structure holder adjacent the distal end. A formation-engaging structure may include a formation-engaging surface at a distal end, a proximal end and a sidewall therebetween. The proximal end and at least a portion of the sidewall of the formation-engaging structure may be received within the receptacle of the formation-engaging structure holder. Earth-boring tools may include such formation-engaging assemblies. | 11-12-2015 |
| 20150322727 | FORMATION-ENGAGING STRUCTURES HAVING RETENTION AND REMOVAL FEATURES, EARTH-BORING TOOLS INCLUDING SUCH STRUCTURES, AND RELATED METHODS - An earth-boring tool includes a formation-engaging structure with a formation-engaging surface at a distal end and a side surface between a proximal end and the distal end along a central axis of the formation-engaging structure. A generally linear recess may be formed in the side surface along an axis oriented at a non-parallel angle relative to the central axis of the formation-engaging structure. A generally helical recess may be formed in the side surface, and the generally helical recess may intersect the generally linear recess. Earth-boring tools may include such formation-engaging structures. Methods may be used to form such formation-engaging structures. | 11-12-2015 |
