| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 175425000 |
Specific or diverse material
| 571 |
| 175331000 |
Rolling cutter bit or rolling cutter bit element
| 257 |
| 175393000 |
With fluid conduit lining or element (e.g., slush tube)
| 36 |
| 175414000 |
Impact or percussion type
| 34 |
| 175403000 |
Core forming type
| 28 |
| 175385000 |
Bit with leading portion (e.g., pilot) forming smaller diameter initial bore
| 18 |
| 175406000 |
Noncutting portion forwardly of cutting portion (e.g., reamer)
| 17 |
| 175412000 |
Plural separable cutter elements
| 14 |
| 175394000 |
With helical-conveying portion
| 11 |
| 175408000 |
With bit guide or bore wall compacting device
| 9 |
| 175398000 |
Nonsymmetrical bit
| 6 |
| 175402000 |
Casing shoe type | 5 |
| 20100025120 | Casing Shoe and Retrievable Bit Assembly - An earth boring bit assembly has a tubular mandrel carried by a casing shoe at the lower end of a string of casing. The casing shoe has stabilizer blades spaced circumferentially apart from each other. A cutter arm seat is formed on the leading edge of each blade at a lower end of the casing shoe. Windows are formed in and spaced circumferentially around the mandrel. A cutter arm is pivotally mounted within each window of the mandrel and movable from an extended position located within one of the cutter arm seats to a recessed position within its window. The cutter arm seats support the cutter arms for torque and axial weight. A sleeve inside the mandrel prevents the cutter arms from pivoting to a recessed position until the sleeve is moved to a released position. | 02-04-2010 |
| 20110209922 | CASING END TOOL - A casing end tool has a mandrel and a body that is defined by a wall having an outer surface and an inner surface opposite of the outer surface. The body is fabricated from crystalline tungsten powder and a binder material. The inner surface includes a set of raised bosses or land structures. The body includes a plurality of blades on the outer surface. Each blade has a plurality of cutters. Blade channels and cutter channels on the blades enhance fragmentation of the body during drill out of the casing end tool. | 09-01-2011 |
| 20110266069 | CASING SHOES INCLUDING CUTTING ELEMENTS, CUTTING ELEMENTS FOR EARTH-BORING TOOL, AND RELATED METHODS - A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough, is disclosed. Cutting elements and methods of use are disclosed. Adhesive, solder, electrically disbonding material, and braze affixation of a cutting element are disclosed. Differing abrasive material amount, characteristics, and size of cutting elements are disclosed. Telescoping casing sections and bits are disclosed. Aspects and embodiments are disclosed including: at least one gage section extending from a nose portion, at least one rotationally trailing groove formed in at least one of the plurality of blades, a movable blade, a leading face comprising superabrasive material, at least one of a drilling fluid nozzle and a sleeve, grooves for preferential failure, at least one rolling cone affixed to the nose portion, at least one sensor, discrete cutting element retention structures, and percussion inserts. | 11-03-2011 |
| 20140299386 | CORRODABLE BORING SHOES FOR WELLBORE CASING, AND METHODS OF FORMING SUCH CORRODABLE BORING SHOES - Earth-boring casing shoes include a crown configured for at least one of drilling and reaming a wellbore when the crown is attached to a section of casing and the casing is advanced into a wellbore. The crown includes a body comprising a corrodible composite material, and at least one cutting structure carried on the body. The casing shoes further include a connection structure configured for attachment to a section of casing. Methods are used to form such casing shoes, and such casing shoes are used to install casing within wellbores. | 10-09-2014 |
| 20150300094 | EXCAVATING TOOL - An excavating tool includes a casing pipe that forms a cylindrical shape about an axis line and in which a stepped portion whose inner diameter is decreased by one step is formed in an inner peripheral portion of an distal end; an inner bit where a contact portion which can come into contact with the stepped portion is formed in an outer periphery, which is inserted into the casing, and whose distal end portion protrudes from a distal end of the casing pipe; an engagement convex portion that is disposed on the outer periphery of the distal end portion of the inner bit so as to be retractable; a ring bit that forms an annular shape and is arranged around the distal end portion of the inner bit; and an engagement concave portion that is formed in an inner peripheral portion of the ring bit. | 10-22-2015 |
| 175382000 |
Adjustable cutter element | 5 |
| 20170234075 | DRILLING TOOL | 08-17-2017 |
| 20100314176 | CUTTER ASSEMBLIES, DOWNHOLE TOOLS INCORPORATING SUCH CUTTER ASSEMBLIES AND METHODS OF MAKING SUCH DOWNHOLE TOOLS - Cutter assemblies comprising an outer support element and a cutting element disposed therein. The cutting element is immovably attached to the outer support element. Also provided are downhole tools incorporating such cutter assemblies and methods of making such downhole tools. | 12-16-2010 |
| 20100018779 | PLACEMENT OF CUTTING ELEMENTS ON SECONDARY CUTTING STRUCTURES OF DRILLING TOOL ASSEMBLIES - A secondary cutting structure for sure in a drilling assembly, the secondary cutting structure including a tubular body and a block, extendable from the tubular body, the block including a first arrangement of cutting elements disposed on a first blade and a second arrangement of cutting elements disposed on a second blade, wherein the second arrangement is a modified redundant arrangement. Also, a secondary cutting structure for use in a drilling assembly, the secondary cutting structure including a leading blade disposed on a first block and a trailing blade disposed on the first block adjacent the leading blade. Additionally, the secondary cutting structure includes a unique blade disposed on a second block, wherein a gage portion of at least one of the blades has a length between 30% and 45% of a total blade length. | 01-28-2010 |
| 20140251697 | Vehicular Auger Implement - An auger implement for vehicular attachment and moveable support of an auger having a motor and an auger bit driven by the motor, featuring: a vehicular mount; a central articulating section connected to the vehicular mount and providing a range of movement; an auger support and control section connected to the central articulating section and providing an operator handle for guiding the auger within the range of the central articulating section and a hand-operated switch for energizing the motor; wherein the central articulating section comprises a counter balanced double 4 bar linkage. | 09-11-2014 |
| 20150129320 | METHODS OF REPAIRING CUTTING ELEMENT POCKETS IN EARTH-BORING TOOLS WITH DEPTH-OF-CUT CONTROL FEATURES, AND TOOLS AND STRUCTURES FORMED BY SUCH METHODS - Methods of repairing earth-boring tools may involve providing wear-resistant material over a temporary displacement member to repair a cutting element pocket in a body and a depth-of-cut control feature using the wear-resistant material. In some embodiments, the wear-resistant material may comprise a particle-matrix composite material. For example, a hardfacing material may be built up over a temporary displacement member to form or repair a cutting element pocket and provide a depth-of-cut control feature. Earth-boring tools may include a depth-of-cut control feature comprising a wear-resistant material. The depth-of-cut control feature may be configured to limit a depth-of-cut of a cutting element secured within a cutting element pocket partially defined by at least one surface of the depth-of-cut control feature. Intermediate structures formed during fabrication of earth-boring tools may include a depth-of-cut control feature extending over a temporary displacement member. | 05-14-2015 |
| 175421000 |
Symmetrical forked rotary type (e.g., fishtail) | 3 |
| 20080296070 | CUTTER GEOMETRY FOR INCREASED BIT LIFE AND BITS INCORPORATING THE SAME - An improved cutter for fixed cutter drill bits includes a base portion with a longitudinal axis that extends through a center of the base portion and a cutting face which is generally centered with the base portion. The cutting face has a periphery edge geometry comprising a first arcuate segment and a second arcuate segment spaced apart and arranged opposite each other with linear edge segments disposed there between forming sides of the cutting face. The cutting face spans a maximum edge-to-edge dimension L in a first direction that corresponds to a major axis of the cutting face. The cutting face spans a maximum edge-to-edge dimension W in a second direction, which is perpendicular to the first direction, and W is less than L. | 12-04-2008 |
| 20090025984 | SINGLE MOLD MILLING PROCESS FOR FABRICATION OF ROTARY BITS TO INCLUDE NECESSARY FEATURES UTILIZED FOR FABRICATION IN SAID PROCESS - A bit mold is milled using a turning stage which forms a base mold component and a base gagering component. Next, a blade milling stage is performed in which the base mold component and base gagering component are milled to define integral junkslot formers separated by blade regions. Lastly, a pocket milling stage is performed in which the blade regions and integral junkslot formers of the base mold component are milled to define a plurality of cutter pockets in primary and perhaps secondary rows. Each cutter pocket includes a seat portion and a face portion. The milling of the pocket milling stage provides, at one or more of the cutter pockets, a facet. This facet is provided in an area about the junkslot former associated with the face portion of the cutter pocket, the face portion having, due to the presence of the facet, a surface for matching a cutter core displacement end surface without voids of a size which would require the use of fill material. The facet is also provided on either side of the pocket associated with the seat portion to avoid the need to clay the sides of the displacement for providing top-loading clearances. The milling process at the pocket milling stage further supports definition of relief and erosion resistance features in the mold. | 01-29-2009 |
| 20160130880 | Drill Head Insert or Drill Head Attachment and Drill - A drill head insert or drill head attachment, in particular a drill plate made of hard metal, for a rock drill, includes cutting edges ( | 05-12-2016 |
| 175401000 |
Cutting edges facing in opposite axial directions | 3 |
| 20080202819 | Reversible cutting tool with shield - A cutting tool has a first cutting end, a second cutting end, a shoulder at an interface between the first cutting end and the second cutting end, and a shield removably mounted on one of the first cutting end and second cutting end. The cutting ends each have a cutting tip at a distal end, a body portion, a recess in the body portion and a retainer positioned in the recess. Cutting ends can be mirror images of each other, or may be non-mirror imaged, for example with different gage lengths, to accommodate different operating conditions. One of the cutting ends is mounted in a holder and the shield protects the retainer and recess features on the operating cutting end. A combination of a reversible cutting tool and a sleeve and/or block holder system, an apparatus for cutting, a sleeve per se and a shield per se are also disclosed. | 08-28-2008 |
| 20090057030 | MINING CLAW BIT - A mining bit includes a bit body having a central axis, the bit body having a forward portion with faceted surfaces and a rearward attachment portion. The mining bit further includes a plurality of wings extending from the faceted surfaces of the bit body and arranged about a central hub. A plurality of cutting elements are disposed on distal ends of the wings. | 03-05-2009 |
| 20100071963 | Staggered Compact Row on Same Land - An earth boring drill bit comprising cones, each cone having a land on its mid portion with at least two rows of compacts that are staggered with respect to adjacent compacts on another row. The compacts of these two rows may also have the same size. The compacts of these two inner rows are closer to each other than to any other compacts on the cone. | 03-25-2010 |
| 175328000 |
Magnetized or with magnet | 2 |
| 20090211816 | Magnetic bit sub - A magnetic bit sub for collecting ferrous metal particles from oil wells, gas wells, and water wells during well drilling operations, well completion operations, and well maintenance operations provides tubular member with a threaded male connector on the upper end, for attachment to a drill string, and a threaded female connector on the lower end, for attachment to a drill bit, another portion of drill string, or another magnetic bit sub. Permanent magnets removably secured within recesses spaced along the outer surface of the tubular member collect ferrous metal particles coming into the proximity of the recessed permanent magnets for removal when the drill string is removed from the well. | 08-27-2009 |
| 20130000991 | SYSTEMS AND METHODS TO REDUCE OSCILLATIONS IN MAGNETIC COUPLINGS - A drilling system includes a magnetic coupling and an oscillation absorber. The magnetic coupling has a rotor that rotates about an axis of rotation. The oscillation absorber is in operable communication with the magnetic coupling and includes an outer layer coupled to a separator layer of the magnetic coupling to form an enclosed area. An absorber shaft of the oscillation absorber is at least partially within the enclosed area and is coupled to the rotor. The absorber further includes an outer mover arranged such that rotation of the absorber shaft causes the outer mover to rotate due to interaction of inner absorber shaft magnets and outer mover magnets. | 01-03-2013 |
| 175397000 |
Forked rotary nontracking | 2 |
| 20080289881 | FIXED CUTTER BIT PARTIAL BLADE CONNECTION AT BIT CENTER - A fixed cutter drill bit including a bit body having a plurality of primary blades extending radially from a bit center area, wherein the bit center area includes a partial connection between at least two of the plurality of primary blades. The fixed cutter drill bit further including at least one cutter disposed on at least one of the blades. Additionally, a method of designing a fixed cutter drill bit includes modeling the fixed cutter drill bit, the fixed cutter drill bit including a plurality of primary blades extending radially from a bit center area, wherein the plurality of primary blades includes a plurality of cutters. The method further including determining a center of an innermost cutter on each primary blade, creating a partial connection between the primary blades, and outputting the model of the fixed cutter drill bit. | 11-27-2008 |
| 20110253457 | DRAG BIT WITH UTILITY BLADES - A drill bit is disclosed herein, the drill bit having a bit body, a plurality of cutting blades extending radially from the bit body and having cutting elements disposed thereon, the plurality of cutting blades forming a cutting blade gage pad diameter configured to contact a formation, and a plurality of raised volumes of material extending from the bit body and devoid of cutting elements, the plurality of raised volumes of material forming a gage pad diameter configured to contact the formation, wherein the plurality of cutting blades and the plurality of raised volume of material are circumferentially spaced having fluid courses that extend therebetween. | 10-20-2011 |
| 175396000 |
Axially parallel side wall with transverse cuttings retaining portion | 1 |
| 20090095537 | SYSTEM, METHOD, AND APPARATUS FOR VARIABLE JUNK SLOT DEPTH IN DRILL BIT BODY TO ALLEVIATE BALLING - An earth boring drill bit design for alleviating balling varies the junk slot depth in junk slots subject to balling from the other junk slots. Using variable depth bit bodies enhances the hydraulic characteristics of the bit as well as assists in the placement of the nozzles for machining purposes. This flexibility optimizes the area changes along the ducts required by the bit's operation. | 04-16-2009 |
| 175381000 |
Cutting edges relatively longitudinally movable during operation | 1 |
| 20100270085 | ADAPTIVE CONTROL CONCEPT FOR HYBRID PDC/ROLLER CONE BITS - An earth boring drill bit comprising a bit body having a longitudinal axis along a path of the bit, a first plurality of cutters mounted to the body, and a second plurality of cutters rotatably mounted to the body, wherein a longitudinal axial relationship between the first plurality of cutters and the second plurality of cutters is adjustable. The first and/or second plurality of cutters may be mounted to the body in such a manner as to allow them to slide parallel to the longitudinal axis. The longitudinal axial relationship may be adjusted to exchange the first plurality of cutters and the secondary plurality of cutters between a primary cutting position and a secondary cutting position. The bit may include a sensor to provide an indication of a formation type being excavated by the bit and a processor to control the longitudinal axial relationship based on the indication. | 10-28-2010 |
| 175379000 |
Cutting edge self-renewable during operation | 1 |
| 20100230174 | Impregnated Bit with Improved Grit Protrusion - A diamond impregnated drill bit features layered encapsulation of the diamond grit where the innermost layer is hardest or most abrasion resistant while succeeding layers are generally softer and less wear resistant. This can be accomplished by manipulating several variables in the encapsulation layers such as particle size or hard particle concentration. The outer layers can have added binder to make them softer. The encapsulated grit can be sintered or pre-sintered to make it less friable when handled. As a result the encapsulated diamonds are retained in the matrix longer with higher protrusion to improve bit longevity and penetration rates. | 09-16-2010 |
| Entries |
| Document | Title | Date |
|---|
| 20080302575 | Fixed Cutter Bit With Backup Cutter Elements on Primary Blades - A drill bit for drilling a borehole comprises a bit body having a bit face. In addition, the drill bit comprises a plurality of primary blades. Further, the drill bit comprises a plurality of primary cutter elements mounted to each primary blade and at least one backup cutter element mounted to each primary blade. Still further, the drill bit comprises a plurality of secondary blades. Moreover, the drill bit comprises a plurality of primary cutter elements mounted to each secondary blade. The ratio of the total number of backup cutter elements mounted to the plurality of primary blades to the total number of backup cutter elements mounted to the plurality of secondary blades is greater than 2.0. Each backup cutter element on each primary blade has substantially the same radial position as one of the primary cutter elements on the same primary blade. | 12-11-2008 |
| 20090084606 | DRILL BITS AND TOOLS FOR SUBTERRANEAN DRILLING - A drill bit that includes a boss extending rotationally forward of at least one blade thereof in a gage region of a bit body for increasing stability and reducing impact shock caused by a lateral imbalance force acting on the bit while drilling a subterranean formation is disclosed. The boss includes a circumferential bearing surface that rotationally precedes a circumferential bearing surface of the at least one blade. A drill bit that includes a boss having a nozzle port extending therein is also disclosed. | 04-02-2009 |
| 20090107730 | DRILL BITS AND TOOLS FOR SUBTERRANEAN DRILLING - A drill bit having a bit body includes a blade face surface on at least one blade extending longitudinally and radially outward over a face of the bit body. The blade face surface of the at least one blade includes a contact zone and a sweep zone. The sweep zone rotationally trails the contact zone with respect to a direction of intended bit rotation about a longitudinal axis of the bit body provides reduce rubbing contact when engaging with a subterranean formation. | 04-30-2009 |
| 20090194338 | METHOD AND APPARATUS FOR CEMENTING DRILL STRINGS IN PLACE FOR ONE PASS DRILLING AND COMPLETION OF OIL AND GAS WELLS - The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are described that provide for the efficient installation a cemented steel cased well wherein the drill string and the drill bit are cemented into place during one single drilling pass down into the earth. The normal mud passages or watercourses present in the rotary drill bit are used for the second independent purpose of passing cement into the annulus between the casing and the well while cementing the drill string into place during one single pass into the earth. A one-way cement valve is installed near the drill bit of the drill string that allows the cement to set up efficiently under ambiently hydrostatic conditions while the drill string and drill bit are cemented into place during one single drilling pass into the earth. | 08-06-2009 |
| 20090301786 | METHODS OF FORMING EARTH-BORING TOOLS USING GEOMETRIC COMPENSATION AND TOOLS FORMED BY SUCH METHODS - Geometric compensation techniques are used to improve the accuracy by which features may be located on drill bits formed using particle compaction and sintering processes. In some embodiments, a positional error to be exhibited by at least one feature in a less than fully sintered bit body upon fully sintering the bit body is predicted and the at least one feature is formed on the less than fully sintered bit body at a location at least partially determined by the predicted positional error. In other embodiments, bit bodies of earth-boring rotary drill bits are designed to include a design drilling profile and a less than fully sintered bit body is formed including a drilling profile having a shape differing from a shape of the design drilling profile. Less than fully sintered bit bodies of earth-boring rotary drill bits are formed using such methods. | 12-10-2009 |
| 20090301787 | METHODS OF ATTACHING A SHANK TO A BODY OF AN EARTH-BORING TOOL INCLUDING A LOAD BEARING JOINT AND TOOLS FORMED BY SUCH METHODS - Earth-boring rotary drill bits including a bit body attached to a shank assembly at a joint. In some embodiments, the joint may be configured to carry at least a portion of any tensile longitudinal and rotational load applied to the drill bit by mechanical interference at the joint. In additional embodiments, the joint may be configured to carry a selected portion of any tensile longitudinal load applied to the drill bit. Methods for attaching a shank assembly to a bit body of an earth-boring rotary drill bit include configuring a joint to carry at least a portion of any tensile longitudinal and rotational load applied to the drill bit by mechanical interference. Additional embodiments include configuring a joint to carry a selected portion of any tensile longitudinal load applied to the drill bit by mechanical interference. | 12-10-2009 |
| 20100018776 | CUTTING BIT FOR MINING AND EXCAVATING TOOLS - A wear-resistant cutting bit for use on a mining or excavating cutting tool is disclosed. The cutting bit utilizes a hardened insert having a narrow base attached to the remainder of the cutting bit. An extended collar of the hardened insert projects from the cutting bit and ends with a generally conical section. The extended collar and narrow base of the hardened insert enable the cutting bits of the present invention to be more wear-resistant and cost-effective than other cutting bits used on mining and excavating equipment. | 01-28-2010 |
| 20100044114 | 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. | 02-25-2010 |
| 20100307835 | Drill Bit with Weight and Torque Sensors - A drill bit made according to one embodiment includes a bit body and at least one preloaded sensor in the bit body. In one aspect, the sensor may include a sensor element on a sensor body having a first end and a second end and wherein the sensor is preloaded after placing the sensor body in the bit body. In another aspect, the sensor may be preloaded outside the bit body and then placed in the bit body in a manner that enables the sensor to retain the preloading. | 12-09-2010 |
| 20110079439 | METHOD AND APPARATUS FOR CEMENTING DRILL STRINGS IN PLACE FOR ONE PASS DRILLING AND COMPLETION OF OIL AND GAS WELLS - The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are described that provide for the efficient installation a cemented steel cased well wherein the drill string and the drill bit are cemented into place during one single drilling pass down into the earth. The normal mud passages or watercourses present in the rotary drill bit are used for the second independent purpose of passing cement into the annulus between the casing and the well while cementing the drill string into place during one single pass into the earth. A one-way cement valve is installed near the drill bit of the drill string that allows the cement to set up efficiently under ambiently hydrostatic conditions while the drill string and drill bit are cemented into place during one single drilling pass into the earth. | 04-07-2011 |
| 20110155471 | DRIVE PIN SUPPORT - A chuck assembly, an assembly for an earth-boring drill assembly, and a method of manufacturing a chuck assembly. In the assembly, a first portion of the chuck bore may have a minimum inner diameter greater than the chuck spline maximum inner diameter. A support ring recess may be defined in the bore axially between the chuck splines and the first end. A support ring may be positionable in the support ring recess, and the support ring, when positioned in the support ring recess, may have a support ring inner diameter less than the minimum inner diameter of the first portion of the bore. The drive pin may be positionable circumferentially between one of the chuck splines and an associated one of the bit splines and have an axial end surface at least partially engageable with the support ring to limit axial movement of the drive pin toward the first end. | 06-30-2011 |
| 20120138369 | METHODS TO MANUFACTURE DOWNHOLE TOOLS WITH FINISHED FEATURES AS AN INTEGRAL CAGE - A method of manufacturing a downhole tool includes machining at least one mill blade integral cage comprising a plurality of mill blades arranged around a central axis and securing the at least one mill blade integral cage on a tool body. | 06-07-2012 |
| 20130014998 | DOWNHOLE CUTTING TOOL AND METHODAANM Lynde; Gerald D.AACI HoustonAAST TXAACO USAAGP Lynde; Gerald D. Houston TX US - A downhole cutting tool includes a base including a first consolidated powder; and at least one cutting feature affixed to the base, the at least one cutting feature including a cutting material suspended in a second consolidated powder, wherein the base and the at least one cutting feature are both consolidated and bonded together simultaneously. Also included is a method of manufacturing a cutting tool. | 01-17-2013 |
| 20130081880 | DRILL BIT DESIGN FOR MITIGATION OF STICK SLIP - A method of designing an earth-boring rotary drill bit includes designing a bit body and cutting elements of the drill bit such that features of the drill bit other than cutting elements engage and rub against the subterranean formation being drilled by the drill bit at depths-of-cut beyond, but close to, an intended median depth-of-cut, and such that the amount of rubbing area between such features and the formation increases at a relatively rapid rate as the depth-of-cut increases beyond the intended median depth-of-cut. Such methods may be employed to mitigate the occurrence of the stick-slip phenomenon during drilling. A method of fabricating a drill bit includes configuring a bit body and cutting elements in accordance with such a design. Earth-boring drill bits include a bit body and cutting elements so configured. | 04-04-2013 |
| 20130333950 | HEAT FLOW CONTROL FOR MOLDING DOWNHOLE EQUIPMENT - There is disclosed herein a method of designing a mold, the mold being at least part of a unitary body to be formed from a plurality of layers by 3D printing, the method comprising: defining an inner surface of the mold corresponding to at least part of an outer surface of an object to be molded in the mold; selecting a first material from which at least part of the mold is to be printed; and selecting a second material from which at least another part of the mold is to be printed, the second material having a higher thermal and/or electrical conductivity than the first material, wherein at least one of the layers from which the mold is to be formed by 3D printing includes areas to be printed from each of the first and second materials. | 12-19-2013 |
| 20140116786 | BEARING ASSEMBLIES, APPARATUSES, AND MOTOR ASSEMBLIES USING THE SAME - Bearing assemblies, apparatuses, and motor assemblies using the same are disclosed. In an embodiment, a bearing assembly includes a plurality of superhard bearing elements distributed circumferentially about an axis. At least some of the superhard bearing elements may include a first end surface, a second end surface generally opposite the first end surface, a first side surface extending between the first end surface and the second end surface, a second side surface generally opposite the first side surface, and a bearing surface extending between the first end surface, the second end surface, the first side surface and the second side surface. Such superhard bearing elements may also include a ramped feature negatively sloping away from the bearing surface. The bearing assembly may further include a support ring that carries the plurality of superhard bearing elements. | 05-01-2014 |
| 20140182947 | CUTTING INSERT FOR PERCUSSION DRILL BIT - A cutting insert for a percussion hammer bit. The cutting insert includes a base portion for coupling to a bit face of the percussion hammer bit. An extension portion is coupled to the base portion and axially offset therefrom along a longitudinal axis extending through the base portion and the extension portion. The extension portion includes at least three lobes that are circumferentially offset from one another around the longitudinal axis. The lobes extend axially away from the base portion, and the lobes extend radially outward from the longitudinal axis. | 07-03-2014 |
| 20140262535 | BORING BIT AND METHOD OF MANUFACTURE - A boring bit has a shank, a head and teeth distributed around the head. The teeth have a root embedded within the head's core body, a tip extending out of the head, and a narrowing region between the root and the tip. More than approximately two-thirds of the tooth length is embedded in the core body, including a portion of the narrowing region. Stabilizing rods are welded to the tips of the teeth to form a temporary connection, and the core body is formed from a molten metal poured into a cavity of a cast mold. The rods are inserted into indentations in the cast to hold the teeth in place, and the molten metal heats the teeth and weld to substantially loosen the temporary connection. As the molten metal cools, it solidifies around the teeth and secures the root and narrowing region of the teeth within the core body. | 09-18-2014 |
| 20140284113 | METHODS OF ATTACHING A SHANK TO A BODY OF AN EARTH-BORING TOOL INCLUDING A LOAD-BEARING JOINT AND TOOLS FORMED BY SUCH METHODS - Earth-boring rotary drill bits may include a bit body attached to a shank assembly at a joint. The joint may be configured to carry at least a portion of any tensile longitudinal and rotational load applied to the drill bit by mechanical interference at the joint. The joint may be configured to carry a selected portion of any tensile longitudinal load applied to the drill bit. Methods for attaching a shank assembly to a bit body of an earth-boring rotary drill bit include configuring a joint to carry at least a portion of any tensile longitudinal and rotational load applied to the drill bit by mechanical interference. The joint may be configured to carry a selected portion of any tensile longitudinal load applied to the drill bit by mechanical interference. | 09-25-2014 |
| 20140291033 | METHODOLOGIES FOR MANUFACTURING SHORT MATRIX BITS - A downhole tool and method for manufacturing such downhole tool. The downhole tool includes a bit body having a blank and a matrix bonded to and surrounding the blank, a shank having a threaded connection at one end, and a butt joint formed within a gap formed between the blank and the shank and coupling the blank to the shank. The blank includes a first planar surface while the shank includes a second planar surface opposite the one end. The butt joint is formed between the first and second planar surfaces when positioned adjacent to one another, wherein the first planar surface is positioned external to the matrix. | 10-02-2014 |
| 20140311808 | EXCAVATION TOOL - In an excavation tool of the present invention, an embedding hole is drilled in a distal end portion of a tool body which is rotated about an axis line O and is moved forward to a distal end side in a direction of the axis line O. In the embedding hole, an excavation tip in which an embedding portion having an outer cylindrical shape is formed integrally with a cutting edge portion inserts the embedding portion into the embedding hole and causes the cutting edge portion to protrude from the embedding hole. In this manner, the excavation tip is rotatable around a central axis C of the embedding portion during excavation, and is attached thereto by being locked so as not to slip toward a distal end side of the embedding portion | 10-23-2014 |
| 20140326514 | Drill Bit with a Dynamic Metal Seal - In one aspect, a drill bit is disclosed that in one embodiment may include a bit body, a rotating cutter on the bit body, and a metallic seal between the bit body and the rotating cutter that includes a first seal member, a second seal member having a first end in sealing contact with the first seal member, a second end fixed relative to the first end and a bias member between the first end and the second end that adjusts the load on the first seal member in response to external load applied on the drill bit. | 11-06-2014 |
| 20150330153 | EARTH-BORING TOOLS INCLUDING BEARING ELEMENT ASSEMBLIES, AND RELATED METHODS - An earth-boring tool includes a body comprising a pocket in a leading end thereof for accepting at least a portion of a bearing element assembly. A bearing element assembly may be disposed within the pocket, and the bearing element assembly may include a retaining element at least partially disposed in a groove in a sidewall of the pocket and a bearing element. The bearing element may include a distal end having a bearing surface, a proximal end, and a side surface between the distal end and the proximal end, the side surface comprising a feature configured to abut the retaining element, wherein mechanical interference between the feature and the retaining element axially retains the bearing element within the pocket. Methods include disengaging a mechanical retention device retaining a bearing element within a pocket in a body of the earth-boring tool, and removing the bearing element from the pocket. | 11-19-2015 |
| 20160017663 | Repetitive Pulsed Electric Discharge Apparatuses and Methods of Use - Electrocrushing drills and methods for operating electrocrushing drills. Electrocrushing drill bits comprise one or more high voltage electrodes surrounded by a ground or current return structure, which can be a ring or a comprise rod shaped electrodes. Openings in the rim of the current return structure facilitate removal of drilling debris and bubbles created by the electrocrushing process out from the bottom face of the bit and up the wellbore. The high voltage electrodes can be arranged in a circle. The current return structure may partially cover the bottom face of the drill bit, thereby enclosing the high voltage electrodes in openings that may be sector shaped. Also a method and apparatus for interrupting communications between downhole data acquisition systems and a surface controller system during each drill pulse, thereby reducing noise. A direct connection between the two systems enables high speed communications, thereby improving safety by providing the operator with more advance warning of a possible blowout. Also a method and apparatus for dividing a flow of drilling fluid both to sweep drilling debris and bubbles out of the drill bit and hole and to cool high power electrical components. | 01-21-2016 |
| 20160089821 | HEAT FLOW CONTROL FOR MOLDING DOWNHOLE EQUIPMENT - There is disclosed herein a method of designing a mold, the mold being at least part of a unitary body to be formed from a plurality of layers by 3D printing, the method comprising: defining an inner surface of the mold corresponding to at least part of an outer surface of an object to be molded in the mold; selecting a first material from which at least part of the mold is to be printed; and selecting a second material from which at least another part of the mold is to be printed, the second material having a higher thermal and/or electrical conductivity than the first material, wherein at least one of the layers from which the mold is to be formed by 3D printing includes areas to be printed from each of the first and second materials. | 03-31-2016 |
| 20160138343 | DOWNHOLE TOOL AND METHOD OF MANUFACTURING A TOOL - Producing a drag bit includes creating a mold corresponding to the surface of the bit and inserting a core in the mold corresponding to the plenum of the bit. A preliminary shaped bit is cast in the mold. Excess material is removed from the casting to produce a final shaped bit. | 05-19-2016 |
