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Class Information
Number: 175/393
Name: Boring or penetrating the earth > Bit or bit element > With fluid conduit lining or element (e.g., slush tube)
Description: Apparatus in which the bit is provided with means to conduct fluid comprising (1) a coated or treated passage or (2) a distinct element which is limited in use to fluid conducting, directing or blocking a fluid passage.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7617886 |
Fluid-actuated hammer bit |
Nov. 17, 2009 |
| 7533737 |
Jet arrangement for a downhole drill bit |
May. 19, 2009 |
| 7520343 |
Retrievable center bit |
Apr. 21, 2009 |
| 7481284 |
Converging diverging nozzle for earth-boring drill bits, method of substantially bifurcating a drilling fluid flowing therethrough, and drill bits so equipped |
Jan. 27, 2009 |
| 7413033 |
Directional drill head |
Aug. 19, 2008 |
| 7373994 |
Self cleaning coring bit |
May. 20, 2008 |
| 7290626 |
Transmission sleeve |
Nov. 6, 2007 |
| 7281592 |
Injecting a fluid into a borehole ahead of the bit |
Oct. 16, 2007 |
| 7252164 |
Cutting structure based hydraulics |
Aug. 7, 2007 |
| 7243743 |
Drilling assembly and method for drilling a barehole into geological formations |
Jul. 17, 2007 |
| 7213661 |
Dual property hydraulic configuration |
May. 8, 2007 |
| 7117960 |
Bits for use in drilling with casting and method of making the same |
Oct. 10, 2006 |
| 7090039 |
Assembly for drilling low pressure formation |
Aug. 15, 2006 |
| 7070010 |
Drill bit |
Jul. 4, 2006 |
| 7055626 |
Core bit having features for controlling flow split |
Jun. 6, 2006 |
| 6986297 |
Method of manufacturing PDC cutters with chambers or passages |
Jan. 17, 2006 |
| 6966393 |
Drill drive steel |
Nov. 22, 2005 |
| 6962217 |
Rotary drill bit compensating for changes in hardness of geological formations |
Nov. 8, 2005 |
| 6932171 |
Ground drilling machine |
Aug. 23, 2005 |
| 6913094 |
Leading body for ground drilling and ground drilling machine |
Jul. 5, 2005 |
| 6877571 |
Down hole drilling assembly with independent jet pump |
Apr. 12, 2005 |
| 6848517 |
Drillable drill bit nozzle |
Feb. 1, 2005 |
| 6799648 |
Method of producing downhole drill bits with integral carbide studs |
Oct. 5, 2004 |
| 6702940 |
Device for transporting particles of magnetic material |
Mar. 9, 2004 |
| 6698538 |
Drill bit having adjustable total flow area |
Mar. 2, 2004 |
| 6668948 |
Nozzle for jet drilling and associated method |
Dec. 30, 2003 |
| 6655234 |
Method of manufacturing PDC cutter with chambers or passages |
Dec. 2, 2003 |
| 6581702 |
Three-cone rock bit with multi-ported non-plugging center jet nozzle and method |
Jun. 24, 2003 |
| 6547017 |
Rotary drill bit compensating for changes in hardness of geological formations |
Apr. 15, 2003 |
| 6510907 |
Abrasive jet drilling assembly |
Jan. 28, 2003 |
| 6484825 |
Cutting structure for earth boring drill bits |
Nov. 26, 2002 |
| 6470980 |
Self-excited drill bit sub |
Oct. 29, 2002 |
| 6435435 |
Apparatus for comminution of solid materials using a processor-controlled liquid jet |
Aug. 20, 2002 |
| 6435288 |
Rock drill bit |
Aug. 20, 2002 |
| 6405812 |
Drilling tool for the air-lifting process |
Jun. 18, 2002 |
| 6397959 |
Mill |
Jun. 4, 2002 |
| 6390211 |
Variable orientation nozzles for earth boring drill bits, drill bits so equipped, and methods of orienting |
May. 21, 2002 |
| 6390212 |
Drill bit (b) |
May. 21, 2002 |
| 6374932 |
Heat management drilling system and method |
Apr. 23, 2002 |
| 6321862 |
Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability |
Nov. 27, 2001 |
| 6311793 |
Rock bit nozzle and retainer assembly |
Nov. 6, 2001 |
| 6302223 |
Rotary drag bit with enhanced hydraulic and stabilization characteristics |
Oct. 16, 2001 |
| 6290006 |
Apparatus and method for a roller bit using collimated jets sweeping separate bottom-hole tracks |
Sep. 18, 2001 |
| 6269891 |
Through-drill string conveyed logging system |
Aug. 7, 2001 |
| 6250408 |
Earth-boring drill bits with enhanced formation cuttings removal features |
Jun. 26, 2001 |
| 6230827 |
Earth-boring drill bits with enhanced formation cuttings removal features and methods of drilling |
May. 15, 2001 |
| 6227316 |
Jet bit with variable orifice nozzle |
May. 8, 2001 |
| 6192999 |
Extended drill bit nozzle having extended retainer |
Feb. 27, 2001 |
| 6186251 |
Method of altering a balance characteristic and moment configuration of a drill bit and drill bit |
Feb. 13, 2001 |
| RE37006 |
High flow weld-in nozzle sleeve for rock bits |
Jan. 2, 2001 |
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