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| Number | Title | Issue Date |
| 8127868 | Apparatus and methods for drilling a wellbore using casing Apparatus and methods for drilling with casing. In an embodiment, methods and apparatus for deflecting casing using a diverter apparatus are disclosed. In another embodiment, the apparatus comprises a motor operating system disposed in a motor system housing, a shaf... | 03/06/2012 |
| 8047308 | Rotary drill bit with nozzles designed to enhance hydraulic performance and drilling fluid efficiency A rotary drill bit having one or more fluid nozzles is provided. Each nozzle may include interior surfaces designed to optimize hydraulic performance and efficiency of fluid flowing through the nozzle. The interior surfaces cooperate with each other to minimize turb... | 11/01/2011 |
| 7954568 | Drill bit nozzle assembly and insert assembly including a drill bit nozzle assembly A steel body bit nozzle assembly comprising a bit body having a port therein with a sleeve disposed adjacent a nozzle in the port and an annular seal disposed between an outer wall, each of the sleeve and the nozzle and a wall of the port, each seal being received a... | 06/07/2011 |
| 7938204 | Reamer with improved hydraulics for use in a wellbore A reamer bit for use in earth boring operations comprising a body, mounting elements on the bit body having rolling cutters, and nozzles configured to emit a cleaning spray that is angled with respect to the well bottom. The cleaning spray may be angled up to about ... | 05/10/2011 |
| 7802640 | Rotary drill bit with nozzles designed to enhance hydraulic performance and drilling fluid efficiency A rotary drill bit having one or more fluid nozzles is provided. Each nozzle may include interior surfaces designed to optimize hydraulic performance and efficiency of fluid flowing through the nozzle. The interior surfaces cooperate with each other to minimize turb... | 09/28/2010 |
| 7770671 | Nozzle having a spray pattern for use with an earth boring drill bit An earth boring drill bit having a cleaning nozzle for cleaning cutting elements on the face of the drill bit. A notch is included on the nozzle face for directing an elongated and coherent fluid flow from the nozzle outlet to the cutting element face. The nozzle fa... | 08/10/2010 |
| 7735582 | Insertable devices for retention systems, structures for attachment and methods of use Insertable devices include a body and at least one substantially circumferential groove in an outer side surface of the body. An aperture in a receiving device comprises at least one annular recess extending radially into a sidewall thereof. At least one resilient s... | 06/15/2010 |
| 7681668 | Shrink-fit sleeve assembly for a drill bit, including nozzle assembly and method therefor A shrink-fit sleeve assembly comprising a bit body includes at least one sleeve port with a substantially tubular sleeve disposed therein and interferingly engaged therewith. The sleeve port includes an internal surface of substantially circular cross-section, and t... | 03/23/2010 |
| 7360612 | Roller cone drill bits with optimized bearing structures A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a re... | 04/22/2008 |
| 7334652 | Roller cone drill bits with enhanced cutting elements and cutting structures Roller cone drill bits are provided with cutting elements and cutting structures optimized for efficient drilling of soft and medium formations interspersed with hard stringers. The cutting elements and cutting structures may be satisfactorily used to drill downhole... | 02/26/2008 |
| 7325632 | Nozzle bore for PDC bits An earth boring bit includes a bit body including plurality of PDC cutter elements and a fluid plenum connecting a fluid inlet to at least one fluid orifice. Furthermore, a ledge formed between a bottom of the fluid plenum and the at least one fluid orifice includes... | 02/05/2008 |
| 7258165 | Hole opener and drillable casing guide and methods of use A down-hole tool guide is disclosed for deflecting various down-hole tools having a tendency to hang or bind in uncased bore holes. The down-hole tool guide or ball guide assembly, being adaptive to the down-hole tools, extends forwardly there from and includes an e... | 08/21/2007 |
| 7252164 | Cutting structure based hydraulics A drill bit configures hydraulic streams from the bit nozzles for the particular cutting structure to be cleaned based on the cutting structure location and geometry. The projected impingement location for each hydraulic stream projected fluid path is customized for... | 08/07/2007 |
| 7226130 | Seating with comfort surface A chair includes a base, a seat, a back, and a control operably supporting the seat and back on the base for movement between upright and recline positions. The seat and back include a stiff perimeter frame with opposing perimeter sections, and a plurality of rods e... | 06/05/2007 |
| 7219750 | Process and system for drilling and lining a bore hole An apparatus is provided for the drilling of a borehole and its simultaneous lining with cement or the like by the same apparatus. The apparatus comprises a combination spray head and reamer head, a means to drive the reamer head through a borehole and a means for d... | 05/22/2007 |
| 7213661 | Dual property hydraulic configuration A rotary cone rock bit includes one or more hole cleaning nozzles and one or more bit cleaning nozzles. The hole cleaning nozzles of one drill bit define a projected fluid path disposed at a lateral angle of less than six degrees in order to achieve a large impingem... | 05/08/2007 |
| 7188682 | Multi-stage diffuser nozzle A multi-stage diffuser nozzle for use as a drill bit nozzle jet includes a flow restriction portion upstream of a fluidic distributor portion, and also preferably includes a transition region between these two. The flow restrictor communicates with the interior flui... | 03/13/2007 |
| 7160067 | Tool holder assembly A tool holder assembly having a cutting tool, a tool holder, and a sealing portion. The sealing portion is configured to inhibit fluid leakage between the cutting tool and the tool holder. ... | 01/09/2007 |
| 7159660 | Hydrajet perforation and fracturing tool Methods and apparatus for fracturing a subterranean formation which use a fracturing tool. The fracturing tool includes a hydrajet tool, with at least one fluid jet and at least one fracturing port extending through the liner. The fracturing tool further includes a ... | 01/09/2007 |
| 7134512 | Method of downhole drilling and apparatus therefor A downhole drilling apparatus suspended by tubing includes a drill bit driven by an electric motor powered by a cable means. The motor is mounted upon a hollow shaft which allows fluid to pass through, so that a fluid circuit along the tube and back along the annulu... | 11/14/2006 |
| 7124967 | Fan jet nozzle for use with ultra high pressure liquid phase cleaning media for use in deflashing apparatus A fan jet nozzle for use with an ultra high pressure liquid-phase cleaning media for use in a deflashing apparatus includes a nozzle tip, which is made of a super hard material such as diamond, and is secured inside a nozzle holder through sintering. Upper and lower... | 10/24/2006 |
| 7117960 | Bits for use in drilling with casting and method of making the same Bits for use in drilling with a well completion string having a bit body and a cutting face that includes a plurality of sets of cutter elements mounted on the cutting face. The bit body has a central longitudinal bore having an integrated female non-shouldered, sta... | 10/10/2006 |
| 7059430 | Hydro-lifter rock bit with PDC inserts A novel rolling cone rock bit includes a plurality of PDC or other cutters mounted to the leg of the drill bit and positioned to cut the troublesome corner of the bottomhole. The plurality of cutters may be the primary cutting component at gage diameter, or may be r... | 06/13/2006 |
| 7055626 | Core bit having features for controlling flow split A core bit for cutting core samples in subterranean formations. The core bit has interior geometric features configured to control the quantity of drilling fluid, or flow split, flowing into a narrow annulus defined by an inside diameter of the core bit and an outsi... | 06/06/2006 |
| 7040423 | Nozzle bore for high flow rates The present invention relates to a roller cone drill bit that has improved flow characteristics. The roller cone drill bit includes forming at least one relief region inside a bit body of the roller cone drill bit on a ledge formed between a fluid plenum and at leas... | 05/09/2006 |
| 6971458 | Drill bit A drill bit for drilling a borehole into an earth formation is provided. The drill bit has a central longitudinal axis and a bottom surface facing the borehole bottom during drilling with the drill bit, and comprises primary fluid injection means arranged at the bot... | 12/06/2005 |
| 6932285 | Orifice body with mixing chamber for abrasive water jet cutting An improved orifice assembly for use with an ultra high pressure fluid jet cutting apparatus is disclosed. The improved orifice assembly generally includes an orifice body defining a central bore, a high pressure inlet cavity located at an upstream portion of the bo... | 08/23/2005 |
| 6877571 | Down hole drilling assembly with independent jet pump A Down Hole Drilling Assembly (DHDA) that induces artificial lift to remove the drilling fluid from a well bore using a jet pump attached to a casing string. The DHDA includes a drill string that passes through the jet pump assembly. The power fluid is separated fro... | 04/12/2005 |
| 6848517 | Drillable drill bit nozzle A drill bit nozzle providing a through bore for the passage of drilling fluid through a drill bit. The nozzle is made of a material or materials which can be drilled through by standard well bore drilling equipment. The material(s) are selected to provide a surface ... | 02/01/2005 |
| 6789635 | Drill bit for directional drilling in cobble formations A drill bit configured for use in horizontal directional boring includes a spoon-shaped body with a rearwardly angled or inclined arcuate front end face that widens from a leading edge to a trailing edge in a circumferential direction, the front face sloping rearwar... | 09/14/2004 |
| 6763902 | Rockbit with attachable device for improved cone cleaning A rolling cone rock bit having one or more nozzle retention bodies attached by a single orientation mounting is disclosed, as is the associated method for its manufacture. The upper end of the nozzle retention body has a fluid inlet in communication with the interna... | 07/20/2004 |
| 6698538 | Drill bit having adjustable total flow area A drill bit is disclosed which includes a bit body having a plurality of ports therein arranged to provide a flow path between an interior of a drill string and the exterior of the bit body. At least one flow relief is disposed in one of the ports. The at... | 03/02/2004 |
| 6585063 | Multi-stage diffuser nozzle A multi-stage diffuser nozzle for use as a drill bit nozzle jet includes a flow restriction portion upstream of a fludic distributor portion, and also preferably includes a transition region between these two. The flow restrictor communicates with the int... | 07/01/2003 |
| 6581702 | Three-cone rock bit with multi-ported non-plugging center jet nozzle and method A three-cone rock bit employing a non-plugging center jet nozzle with a plurality of staggered inlet orifices leading to side passageways to reduce bit balling. The nozzle defines a tapered cavity through which drilling mud flows and exits in streams. Str... | 06/24/2003 |
| 6571887 | Directional flow nozzle retention body A drill bit having one or more nozzle retention bodies attached by a single orientation mounting is disclosed, as is the associated method for its manufacture. The upper end of the nozzle retention body has a fluid inlet in communication with the internal... | 06/03/2003 |
| 6536847 | Pick box for housing a mineral cutter pick A "wet" pick box 1 comprises a body member 2, adapted in use to be welded to a rotary cutting head, whilst an aperture 5 is provided in the body member. Bores 15, 16 in the body member define an internal water course 6 connectable, at an inlet end 7, to a... | 03/25/2003 |
| 6474423 | Drill bit (A) A drill bit for drilling into earth formations comprising an elongated body having spiral contoured stabilizers for up to a 360-degree stabilization to protect the cutting cones, the elongated body has multiple adjustable openings or nozzles to direct the... | 11/05/2002 |
| 6470980 | Self-excited drill bit sub A drill bit sub attachable to a drilling string above the drill bit, the sub having an oscillation chamber with at least two radially and axially spaced, annular impingement surfaces interconnected by an inclined annular surface. The oscillation chamber i... | 10/29/2002 |
| 6408957 | Sealed bearing roller cone bit having anti-plugging device A roller cone drill bit is disclosed which includes a bit body having at least one leg depending from the bit body. The leg has a journal formed on it at a lower end. The bit body includes an air channel extending at least from an interior of the bit body... | 06/25/2002 |
| 6390212 | Drill bit (b) A drill bit for drilling into earth formations comprising a plurality of cutting cones and a connecting device to attach a drill bit to a drill string for drilling bore holes and providing a stabilizer for the drill bit in a drill hole and providing a plu... | 05/21/2002 |
