Class / Patent application number | Description | Number of patent applications / Date published |
175336000 | Rolling cutter bit with fixed cutter | 31 |
20080264695 | Hybrid Drill Bit and Method of Drilling - A hybrid drill bit having both roller cones and fixed blades is disclosed, and a method of drilling. The cutting elements on the fixed blades form a continuous cutting profile from the perimeter of the bit body to the axial center. The roller cone cutting elements overlap with the fixed cutting elements in the nose and shoulder sections of the cutting profile between the axial center and the perimeter. The roller cone cutting elements crush and pre- or partially fracture formation in the confined and highly stressed nose and shoulder sections. | 10-30-2008 |
20090127002 | ROLLER CONE BIT BEARING WITH ELASTOMERIC SEAL HAVING SELF BREAK-IN PROPERTY - A roller cone bit having an elastomeric seal with a self break-in property is disclosed. The elastomeric seal includes abrasive material on a sliding surface for facilitating break-in. Examples of abrasive materials include ground rock, hard metals, tungsten, tungsten carbide, tantalum, tantalum carbide, titanium carbide, titanium nitride, and minerals, diamonds and nanomaterial enhanced diamond. | 05-21-2009 |
20090272582 | MODULAR HYBRID DRILL BIT - An earth-boring bit comprising a bit body is cofigured at its upper end for connection into a drillstring. A fixed blade depends axially downwardly from the bit body. An axially extending slot is formed in the bit body adjacent the fixed blade. A bit leg is received and retained in the slot by engagement between the slot and correspondingly shaped bit leg, wherein the bit leg cannot be removed from the slot except by axial movement relative to the bit body. A rolling cutter is secured to the bit leg at its lower extent. A fastener secures the bit leg against movement relative to the bit body and extends through oblong apertures in the bit leg and into the bit body, wherein the bit leg can be moved axially relative to the bit body to adjust the projection of the rolling cutter relative to the fixed blade. The slot defines a pair of generally opposed sides connected by a third side, the generally opposed sides being inclined toward one another to define a dovetail that corresponds with the shape of the bit leg. The bit body further comprises a shank that is configured for connection into the drillstring at its upper extent and has a generally cylindrical receptacle formed in its lower extent; and a bit body portion having a generally cylindrical upper extent, the receptacle being and dimensioned to receive the upper extent of the bit body, wherein the shank and bit body portions are secured together by welding. | 11-05-2009 |
20100032215 | Tri-cone bits for horizontal and hard formation drilling applications - The present invention discloses a tri-cone drill bit comprising: three head sections with upper parts thereof jointed together to form a bit body, three cones rotatably mounted to lower ends of the head sections respectively, nozzle sockets designed on the bit body between respective head sections and each having a hole in which a nozzle is mounted, wherein gage cutters are mounted to an upper trailing side of each head O.D. surface to form a gage holding surface thereon, and a leading side of each head section is backwardly slanted as a whole. The design of gage surface at trailing sides of head sections increases the bit's stability, reduces lateral vibration and also reduces tendency of bit deflection in horizontal drilling applications and effective working life of the bit is improved. Backward slant of leading sides of head sections facilitates upward carrying of drilling cuttings and improves drilling efficiency. Jets from the nozzles are respectively directed to the leading side of each following cone, which enhances bottom hole cleaning and cooling of cutting elements and leads to a longer working life and higher ROP of the bit. | 02-11-2010 |
20100155145 | HYBRID DRILL BIT WITH SECONDARY BACKUP CUTTERS POSITIONED WITH HIGH SIDE RAKE ANGLES - A hybrid drill bit having secondary backup cutters positioned with high side rake angles. | 06-24-2010 |
20100155146 | HYBRID DRILL BIT WITH HIGH PILOT-TO-JOURNAL DIAMETER RATIO - The invention disclosed and taught herein is directed to an improved hybrid drill bit and associated elements having at least two rolling cutters, each rotatable around separate spindles on the bit, and at least one fixed blade. The improved drill bit expands the pilot pin to journal diameter ratio within the body of the rolling cutter, but within the confines of the allowable space of the rolling cutter. | 06-24-2010 |
20100224417 | HYBRID DRILL BIT WITH HIGH BEARING PIN ANGLES - The invention disclosed and taught herein is directed to an improved hybrid drill bit having at least two rolling cutters, each rotatable around an axis of rotation, at least one of the rolling cutters having a high pin angle, and at least one fixed blade. The increase in the pin angle can encompass pin angles above 39 degrees to less than 393 degrees. In at least one embodiment, the improved drill bit expands the capabilities of a hybrid bit to allow the rolling cutters to engage a shoulder portion and/or gage portion of the bit profile and assist the fixed blade(s) in these areas. | 09-09-2010 |
20100276205 | METHODS OF FORMING EARTH-BORING ROTARY DRILL BITS - Methods of forming earth-boring rotary drill bits include providing a bit body, providing a shank that is configured for attachment to a drill string, and attaching the shank to the bit body. Providing a bit body includes providing a green powder component having a first region having a first composition and a second region having a second, different composition, and at least partially sintering the green powder component. Other methods include providing a powder mixture, pressing the powder mixture to form a green component, and sintering the green component to a final density. A shank is provided that includes an aperture, and a feature is machined in a surface of the bit body. The aperture is aligned with the feature, and a retaining member is inserted through the aperture. An earth-boring bit includes a bit body comprising a particle-matrix composite material including a plurality of hard particles dispersed throughout a matrix material. A shank is attached to the bit body using a retaining member. | 11-04-2010 |
20100288561 | HYBRID DRILL BIT - A bit body is configured at its upper extent for connection into a drillstring. At least one fixed blade extends downwardly from the bit body, and has a radially outermost gage surface. A plurality of fixed cutting elements is secured to the fixed blade, preferably in a row at its rotationally leading edge. At least one bit leg is secured to the bit body and a rolling cutter is mounted for rotation on the bit leg. At least one stabilizer pad is disposed between the bit leg and the fixed blade, the stabilizer pad extending radially outward to substantially the gage surface. The radially outermost gage surface of each blade can extend axially downward parallel to the bit axis or angled (non-parallel), spirally or helically, relative to the bit axis. | 11-18-2010 |
20100320001 | HYBRID BIT WITH VARIABLE EXPOSURE - An earth boring drill bit comprising a bit body having a bit profile including nose, shoulder, and gage sections; a plurality of fixed cutting elements secured to the body and defining a fixed cutter profile; and a roller cone rotatably secured to the body, the roller cone having a plurality of roller cone cutting elements defining a roller cutter profile, wherein the fixed cutter profile extends beyond the roller cutter profile in at least one of the sections and the roller cutter profile extends beyond the fixed cutter profile in at least one of the sections. The roller cutter profile may extend beyond the fixed cutter profile in the shoulder and gage sections, possibly with the fixed cutter profile extending beyond the roller cutter profile in the nose section and/or a cone section. | 12-23-2010 |
20110079441 | HOLE OPENER WITH HYBRID REAMING SECTION - A hole opener having a hybrid reaming section for downhole earth boring operations may include a reamer body having an axis of rotation, an outer periphery, and upper and lower ends, a plurality of rolling cutters coupled to the outer periphery and depending downwardly, the rolling cutters defining a rolling cutter cutting profile having a cutting diameter, a plurality of fixed blade cutters coupled to the outer periphery and defining a fixed blade cutter cutting profile having a cutting diameter, each fixed blade cutter being coupled between adjacent rolling cutters. At least one of the rolling cutters may be asymmetrically coupled about the axis. The cutting diameter of the rolling cutter cutting profile may be larger than the cutting diameter of the fixed blade cutter cutting profile. At least a portion of the rolling cutter cutting profile may be deeper than the fixed blade cutter cutting profile. | 04-07-2011 |
20110079442 | HOLE OPENER WITH HYBRID REAMING SECTION - A hole opener having a hybrid reaming section for downhole earth boring operations may include a reamer body having an axis of rotation, an outer periphery, and upper and lower ends, a plurality of rolling cutters coupled to the outer periphery and depending downwardly, the rolling cutters defining a rolling cutter cutting profile having a cutting diameter, a plurality of fixed blade cutters coupled to the outer periphery and defining a fixed blade cutter cutting profile having a cutting diameter, each fixed blade cutter being coupled between adjacent rolling cutters. At least one of the fixed blade cutters may be asymmetrically coupled about the axis. The cutting diameter of the fixed blade cutter cutting profile may be larger than the cutting diameter of the rolling cutter cutting profile. At least a portion of the fixed blade cutter cutting profile may be deeper than the rolling cutter cutting profile. | 04-07-2011 |
20110079443 | HOLE OPENER WITH HYBRID REAMING SECTION - A hole opener having a hybrid reaming section for downhole earth boring operations may include a reamer body having an axis of rotation, an outer periphery, and upper and lower ends, a plurality of rolling cutters coupled to the outer periphery, the rolling cutters defining a rolling cutter cutting profile having a cutting diameter, a plurality of fixed blade cutters coupled to the outer periphery and defining a fixed blade cutter cutting profile having a cutting diameter, each fixed blade cutter being coupled between adjacent rolling cutters. At least one fixed blade cutter may be asymmetrically coupled about the axis. The cutting diameter of the fixed blade cutter cutting profile and the cutting diameter of the rolling cutter cutting profile may collectively define a gage diameter. At least a portion of the fixed blade cutter cutting profile may be deeper than the rolling cutter cutting profile. | 04-07-2011 |
20110088954 | POLYCRYSTALLINE COMPACTS INCLUDING NANOPARTICULATE INCLUSIONS, CUTTING ELEMENTS AND EARTH-BORING TOOLS INCLUDING SUCH COMPACTS, AND METHODS OF FORMING SUCH COMPACTS - Polycrystalline compacts include non-catalytic nanoparticles in interstitial spaces between interbonded grains of hard material in a polycrystalline hard material. Cutting elements and earth-boring tools include such polycrystalline compacts. Methods of forming polycrystalline compacts include sintering hard particles and non-catalytic nanoparticles to form a polycrystalline material. Methods of forming cutting elements include infiltrating interstitial spaces between interbonded grains of hard material in a polycrystalline material with a plurality of non-catalytic nanoparticles. | 04-21-2011 |
20110209921 | COLLAPSIBLE ROCK HEAD AND ASSOCIATED STRUCTURE - A collapsible cutter bit or rock head for use with an underground auger boring machine has an expanded position for cutting rock in front of an underground pipe and a collapsed position for withdrawing the rock head through the underground pipe. The auger boring machine is configured to bore a passage through a body of soil and rock and simultaneously lay the underground pipe in the passage. Forward rotation of the cutter bit causes expansion while collapse of the cutter bit may be driven by reverse rotation of the cutter bit or another mechanism. | 09-01-2011 |
20110240376 | 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. | 10-06-2011 |
20110259646 | Disc Cutter for an Earth Boring System - In one aspect of the present invention a disc cutter for an earth boring system includes an axle and a sintered polycrystalline ceramic disc disposed about and forming a continuous perimeter around the axle. The disc cutter may be attached to a drill bit comprising a body, working face and plurality of blades. | 10-27-2011 |
20110290565 | Hybrid Bit with Variable Exposure - An earth boring drill bit comprising a bit body having a bit profile including nose, shoulder, and gage sections; a plurality of fixed cutting elements secured to the body and defining a fixed cutter profile; and a roller cone rotatably secured to the body, the roller cone having a plurality of roller cone cutting elements defining a roller cutter profile, wherein the fixed cutter profile extends beyond the roller cutter profile in at least one of the sections and the roller cutter profile extends beyond the fixed cutter profile in at least one of the sections. The roller cutter profile may extend beyond the fixed cutter profile in the shoulder and gage sections, possibly with the fixed cutter profile extending beyond the roller cutter profile in the nose section and/or a cone section. | 12-01-2011 |
20110290566 | EARTH-BORING BITS AND OTHER PARTS INCLUDING CEMENTED CARBIDE - An article of manufacture includes a cemented carbide piece, and a joining phase that binds the cemented carbide piece into the article. The joining phase includes inorganic particles and a matrix material. The matrix material is a metal and a metallic alloy. The melting temperature of the inorganic particles is higher than the melting temperature of the matrix material. A method includes infiltrating the space between the inorganic particles and the cemented carbide piece with a molten metal or metal alloy followed by solidification of the metal or metal alloy to form an article of manufacture. | 12-01-2011 |
20110315452 | Drill Bits with Anti-Tracking Features - Drill bits with at least two roller cones of different diameters and/or utilizing different cutter pitches in order to reduce bit tracking during drilling operations are described. In particular, earth boring drill bits are provided, the bits having two or more roller cones, and optionally one or more cutter blades, the bits being arranged for reducing tracking by the roller cone teeth during operation by adjusting the teeth spacing, cone pitch angle, and/or the diameter of one or more of the cones. These configurations enable anti-tracking behavior and enhanced drilling efficiency during bit operation. | 12-29-2011 |
20120111638 | SYSTEM AND METHOD FOR ADJUSTING ROLLER CONE PROFILE ON HYBRID BIT - An earth boring drill bit designed for a specific performance, within a finished product tolerance, using components built to a looser manufacturing tolerance. The bit may be assembled by selecting a leg from a plurality of pre-manufactured legs; selecting a bit body from a plurality of pre-manufactured bit bodies, the bit body having a slot for receiving the leg; placing the leg within the slot; and fixing the leg within the slot within the finished product tolerance by placing one or more shims between the leg and the slot. The shims may be used to adjust an axial position, a radial position, and/or a circumferential position of the leg with respect to the slot. The leg and the bit body may be selected, or produced, to ensure the bit will not meet the specification, given the manufacturing tolerance, without the shims. | 05-10-2012 |
20130140093 | DRILL BIT HAVING GEOMETRICALLY SHARP INSERTS - A drill bit configured for boring holes or wells into the earth, the drill bit having a face and a plurality of zones, the drill bit having geometrically sharp inserts located in an inner zone and non-geometrically sharp inserts located in an outer zone. | 06-06-2013 |
20130153305 | Drag Drill Bit With Hybrid Cutter Layout Having Enhanced Stability - A drill bit that provides enhanced stability and a method for manufacturing such bit. In a preferred embodiment, the hybrid drill bit includes a single short driven blade in the shoulder region of the bit having each of its primary cutters plural set, sharing a common radial/elevational position with a primary cutter in an adjacent blade. All other primary cutters of the drill bit are single set at unique radial/elevational positions. The trailing plural-set cutters do less work than the other cutters and disrupt resonance and the feedback mechanism that leads to vibration, instability and whirling. In alternate embodiments, multiple blade pairs or groups may have primary cutters in the shoulder region that are plural set, sharing common radial/elevational positions with other primary cutters. | 06-20-2013 |
20140124270 | PDC BITS HAVING ROLLING CUTTERS AND USING MIXED CHAMFERS - A cutting tool cutting tool may include a tool body having a plurality of blades extending radially therefrom, a plurality of rotatable cutting elements having a first chamfer mounted on at least one of the plurality of blades, and a plurality of non-rotatable cutting elements having a second, distinct chamfer mounted on at least one the plurality of blades. | 05-08-2014 |
20140151131 | Hybrid Drill Bit - A bit body is configured at its upper extent for connection into a drillstring. At least one fixed blade extends downwardly from the bit body, and has a radially outermost gage surface. A plurality of fixed cutting elements is secured to the fixed blade, preferably in a row at its rotationally leading edge. At least one bit leg is secured to the bit body and a rolling cutter is mounted for rotation on the bit leg. At least one stabilizer pad is disposed between the bit leg and the fixed blade, the stabilizer pad extending radially outward to substantially the gage surface. The radially outermost gage surface of each blade can extend axially downward parallel to the bit axis or angled (non-parallel), spirally or helically, relative to the bit axis. | 06-05-2014 |
20140338984 | HOLE OPENER BEARING ARRANGEMENT - The present disclosure provides a back reamer roller cone that is configured so that the bearings assemblies therein can be relatively easily removed and replaced. Methods of replacing the bearing assemblies in a back reamer are also provided. | 11-20-2014 |
20140360789 | SPACING OF ROLLING CUTTERS ON A FIXED CUTTER BIT - A downhole cutting tool may include a cutting element support, structure having a plurality of cutter pockets formed therein; and a plurality of rotatable cutters disposed in the plurality of cutter pockets, wherein at least one rotatable cutter is spaced from another rotatable cutter on the cutting element support structure by at least one-quarter of the diameter of the at least one rotatable cutter. | 12-11-2014 |
20150047910 | DOWNHOLE CUTTING TOOLS HAVING ROLLING CUTTERS WITH NON-PLANAR CUTTING SURFACES - A cutting tool may include a tool body having a plurality of blades extending radially therefrom; each of the plurality of blades having a plurality of cutter pockets formed therein; and at least one rotatable cutting element having a cutting table with a convex cutting surface mounted in at least one of the plurality of cutter pockets, wherein the at least one rotatable cutting element is mounted in a nose or shoulder region of the at least one of the plurality of blades. | 02-19-2015 |
20150075872 | CUTTER PROFILE FOR A FIXED CUTTER DRILL BIT - A cutter profile for a fixed cutter drill bit having a drill bit axis, the cutter profile including a nose portion radially offset from the drill bit axis and surrounding the drill bit axis, a first cone-shaped depression centered on the drill bit axis and extending radially to the nose portion, and a second cone-shaped depression centered on the drill bit axis and extending radially toward the nose portion, wherein a second depression diameter is smaller than a first depression diameter, wherein a second depression maximum depth is greater than a first depression maximum depth, and wherein a second depression included angle is smaller than a first depression included angle. | 03-19-2015 |
20150337603 | HYBRID BIT WITH MECHANICALLY ATTACHED ROLLER CONE ELEMENTS - A modular hybrid bit is disclosed comprising a plurality of fixed blades and at least one rolling cutter assembly that is mechanically fastened to the bit body by a plurality of mechanical fasteners. The rolling cutter assembly can be adjusted to change the axial and radial exposure of the rolling cutter elements. | 11-26-2015 |
20150368977 | COMPOSITE DRILL BIT PROVIDED WITH DISC-TYPE CUTTING STRUCTURE ON CUTTER BLADE - The present invention is related to drilling equipment technologies in petroleum and natural gas, mining engineering, infrastructure construction, geological and hydrological projects. More particularly, it discloses a composite drill bit with scraping-wheel cutting unit being disposed on fixed-blade. The drill bit comprises a bit body, fixed-blades and scraping-wheels. The fixed-blade with cutters fixed thereon is configured on the bit body. The angular deflection of the scraping-wheel is in the range of 20°≦|α|≦90°. At least one scraping-wheel cutting unit, which comprises the scraping-wheel shaft and the scraping-wheel with cutters disposed thereon, is disposed on the fixed-blade forming a rotary connection. This invention saves the space of cutting structure so as to fulfill the potential of alternating cutting and cross-cutting for cutters of the bit, and consequently, increases the overall bit performance. | 12-24-2015 |