Matches 1 - 50 out of 306 1 2 3 4 5 6 7 >


Match Document Document Title
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...
8113301 Jetted underreamer assembly  
An underreamer for earth boring operations has a tubular body with a passage extending through it. Arms are pivotally mounted to the body and movable between retracted and extended positions. An...
8100201 Rotary drill bit  
A rotary drill bit (10) is provided for drilling a hole in a subsurface formation. The bit body (12) includes a plurality of axially extending ribs (16a, b, c and d) and a flow channel between...
8091654 Rock bit with vectored hydraulic nozzle retention sleeves  
A drill bit for drilling through an earthen formation to form a borehole includes a bit body having a central axis, an internal plenum, and an underside. The underside includes an annular outer...
8079427 Methods of forming earth-boring tools having features for affecting cuttings flow  
Methods of forming earth-boring tools include assembling a plurality of head sections about a longitudinal axis to form a bit body, rotatably mounting a cutter to a cutter bearing shaft of each...
8074749 Earth removal member with features for facilitating drill-through  
Embodiments of the present invention generally relate to an earth removal member with features for facilitating drill-through. In one embodiment, an earth removal member for drilling a wellbore...
8028765 Drill bit, drilling system, and related methods  
A rotary drag bit for use in subterranean earth boring operations, the drag bit having blades, rows of cutters on the blades, and nozzles disposed within the rows. The nozzles are configured to...
8020639 Cutting removal system for PDC drill bits  
The blades of a PDC bit have a nozzle between them preferably oriented laterally across the plane of the cutters on the blade and more preferably in a trough disposed adjacent the row of cutters....
8011457 Downhole hammer assembly  
A drill bit assembly comprises a bit body intermediate a shank and a working face. The shank is adapted for connection to a drill string. The drill string comprising a fluid passage at least...
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...
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...
7926596 Drag bit with utility blades  
A drill bit comprises a bit body and a plurality of cutting blades extending radially from the bit body, the plurality of cutting blades further comprising cutting elements disposed thereon. The...
7918292 Earth-boring tools having features for affecting cuttings flow  
An earth-boring bit has a bit body having a plurality of bit legs extending longitudinally therefrom, each bit leg comprising one or more groove regions formed along a laterally outer surface...
7828089 Erosion resistant fluid passageways and flow tubes for earth-boring tools, methods of forming the same and earth-boring tools including the same  
Flow tubes for earth-boring tools include hardfacing material for protecting the tubes from erosion due to the flow of fluid through a fluid passageway extending therethrough. Earth-boring tools...
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...
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...
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...
7730975 Drill bit porting system  
In one aspect of the present invention a drill bit has a jack element with a distal end extending beyond a working face. A porting mechanism within the bore comprises first and second discs...
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...
7665549 Entrainment fluid channeling device for a down-hole drill string  
A fluid channeling device (10) is for a down-hole drill assembly (1) having a central axis (1c) and advanceable into a hole in a downward direction (D) along the axis (1c). The assembly (1)...
7621350 Impregnated bit with changeable hydraulic nozzles  
A diamond impregnated bit crown has blades formed thereon. Flow channels are formed between the blades, the flow channels having inner and outer ends and extending outward to a gage surface of the...
7621349 Drill bit with a fixed cutting structure  
The invention concerns a drill bit (1) with stationary cutting structure, comprising a tool body (2) and several blades (3), which consist of a metal matrix impregnated with abrasive particles, and...
7617886 Fluid-actuated hammer bit  
In one aspect of the present invention, a drilling assembly has a string of downhole tools connected to a drill bit with a bit body intermediate a shank and a working face. The drill bit is...
7533737 Jet arrangement for a downhole drill bit  
A drill bit having a bit body, and axis of rotation, and a working face, the working face having a plurality of cutting elements. A jack element extends from the working face and is coaxial with...
7520343 Retrievable center bit  
A retrievable center bit for use with a tubular including an inner bore and a drill shoe cutter mounted thereon. The retrievable center bit may include a body positionable in the bore of the...
7481284 Converging diverging nozzle for earth-boring drill bits, method of substantially bifurcating a drilling fluid flowing therethrough, and drill bits so equipped  
A nozzle for use on a rotary drill bit for forming a subterranean borehole includes a body and at least one passageway extending through the body from an inlet to an exit aperture. The passageway...
7413033 Directional drill head  
A drill head is shown that provides improved steering in difficult ground conditions such as dry and compacted soil. A drill head is shown with features that include a narrow front portion, a sharp...
7373994 Self cleaning coring bit  
A coring member useful in wellbore excavating operations comprising at least one segment disposed onto the end of a shaft, where a channel is formed between each at least one segment. The at least...
7290626 Transmission sleeve  
The invention is a transmission sleeve for the reverse circulation down hole hammer activated by fluid under pressure, the hammer including an outer hammer casing, a drill bit retaining means (17)...
7281592 Injecting a fluid into a borehole ahead of the bit  
A method and system for introducing a fluid into a borehole, in which there is arranged a tubular drill string including a drill bit, wherein the drill bit is provided with a passageway between the...
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...
7243743 Drilling assembly and method for drilling a barehole into geological formations  
A drilling assembly for drilling a borehole into geological formations. The assembly comprises a drilling shaft and a pump device, both placable in the borehole. The drilling shaft comprises a...
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...
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...
7090039 Assembly for drilling low pressure formation  
The invention relates to a drilling assembly for drilling a borehole into geological formations which assembly comprises: a drilling shaft placable in the borehole, which shaft has a drilling head;...
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...
6986297 Method of manufacturing PDC cutters with chambers or passages  
A cutting element for a drill bit used in drilling subterranean formations is formed with an internal chamber or passage for the flow of drilling fluid therethrough. The cutting element includes a...
6966393 Drill drive steel  
A drive steel member for driving engagement with a rotary drilling machine, including a chuck adapter having main body and chuck seating means and being constructed and arranged in fixed, sealed...
6962217 Rotary drill bit compensating for changes in hardness of geological formations  
A long lasting rotary drill bit for drilling a hole into variable hardness geological formations that has a self-actuating mechanism responsive to the hardness of the geological formation to...
6932171 Ground drilling machine  
A ground drilling machine comprises a controller for automatically controlling the injection of working liquid according to the output signal output as a function of the rotating condition of the...
6913094 Leading body for ground drilling and ground drilling machine  
A leading body for a ground drilling machine is provided which includes a main body which is tapered at a front end thereof to form a first sloped surface and a second sloped surface on opposite...
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...
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...
6702940 Device for transporting particles of magnetic material  
A device for transporting particles of a magnetic material in a selected direction, having a support member having a support surface for supporting the particles, the support surface extending in a...
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...
6668948 Nozzle for jet drilling and associated method  
A jet nozzle is provided for drilling holes through the earth, such as drainholes around a well. The nozzle may include orifices for discharging fluid to drive the nozzle forward and includes a...
6655234 Method of manufacturing PDC cutter with chambers or passages  
The cutting element including a cutting element for a drill bit used in drilling subterranean formations is formed with an internal chamber or passage for the flow of drilling fluid therethrough. A...
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...
6510907 Abrasive jet drilling assembly  
A drilling assembly for drilling a borehole into an earth formation is disclosed having a drill string extending into the borehole and a jetting device arranged at a lower part of the drill string,...
6484825 Cutting structure for earth boring drill bits  
A drill bit for drilling a borehole having a bit body with an axis of rotation, a leading face, and a plurality of blades upstanding from the leading face. At least one of the blades terminates in...
Matches 1 - 50 out of 306 1 2 3 4 5 6 7 >