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Class Information
Number: 175/399
Name: Boring or penetrating the earth > Bit or bit element > Nonsymmetrical bit > With bore wall engaging guide
Description: Apparatus in which the bit is provided with means engaging the wall of the bore being formed to position the bit or direct its course.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7419016 |
Bi-center drill bit |
Sep. 2, 2008 |
| 7401668 |
Single cone rock bit having inserts adapted to maintain hole gage during drilling |
Jul. 22, 2008 |
| 7100711 |
Single cone rock bit having inserts adapted to maintain hole gage during drilling |
Sep. 5, 2006 |
| 6926099 |
Drill out bi-center bit and method for using same |
Aug. 9, 2005 |
| 6920944 |
Apparatus and method for drilling and reaming a borehole |
Jul. 26, 2005 |
| 6827159 |
Steerable horizontal subterranean drill bit having an offset drilling fluid seal |
Dec. 7, 2004 |
| 6814168 |
Steerable horizontal subterranean drill bit having elevated wear protector receptacles |
Nov. 9, 2004 |
| 6810972 |
Steerable horizontal subterranean drill bit having a one bolt attachment system |
Nov. 2, 2004 |
| 6810971 |
Steerable horizontal subterranean drill bit |
Nov. 2, 2004 |
| 6810973 |
Steerable horizontal subterranean drill bit having offset cutting tooth paths |
Nov. 2, 2004 |
| 6739416 |
Enhanced offset stabilization for eccentric reamers |
May. 25, 2004 |
| 6659207 |
Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability |
Dec. 9, 2003 |
| 6602028 |
Support pad for a deep hole drill |
Aug. 5, 2003 |
| 6464024 |
Bi-centered drill bit having improved drilling stability, mud hydraulics and resistance to cutter damage |
Oct. 15, 2002 |
| 6394200 |
Drillout bi-center bit |
May. 28, 2002 |
| 6321858 |
Bit for directional drilling |
Nov. 27, 2001 |
| 6308789 |
Drill bit for directional drilling |
Oct. 30, 2001 |
| 6298929 |
Bi-center bit assembly |
Oct. 9, 2001 |
| 6269893 |
Bi-centered drill bit having improved drilling stability mud hydraulics and resistance to cutter damage |
Aug. 7, 2001 |
| 6213231 |
Boring tool with rectangular plates |
Apr. 10, 2001 |
| 6209660 |
Drill bit shear relief for horizontal directional drilling of rock formations |
Apr. 3, 2001 |
| 6206117 |
Drilling structure with non-axial gage |
Mar. 27, 2001 |
| 6202768 |
Rock drilling tool and reamer for percussive drilling |
Mar. 20, 2001 |
| 6161636 |
Boring head and bit protective collar |
Dec. 19, 2000 |
| 6119797 |
Single cone earth boring bit |
Sep. 19, 2000 |
| 6089336 |
Rotary drill bits |
Jul. 18, 2000 |
| 5992548 |
Bi-center bit with oppositely disposed cutting surfaces |
Nov. 30, 1999 |
| 5979576 |
Anti-whirl drill bit |
Nov. 9, 1999 |
| 5967246 |
Rotary drill bits |
Oct. 19, 1999 |
| 5957223 |
Bi-center drill bit with enhanced stabilizing features |
Sep. 28, 1999 |
| 5873422 |
Anti-whirl drill bit |
Feb. 23, 1999 |
| 5820316 |
Guide element for a cutting tool |
Oct. 13, 1998 |
| 5819860 |
Rotary drill bits |
Oct. 13, 1998 |
| 5402856 |
Anti-whirl underreamer |
Apr. 4, 1995 |
| 5328304 |
Reamer |
Jul. 12, 1994 |
| 5199511 |
Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations |
Apr. 6, 1993 |
| 5186268 |
Rotary drill bits |
Feb. 16, 1993 |
| 5165494 |
Rotary drills bits |
Nov. 24, 1992 |
| 5131478 |
Low friction subterranean drill bit and related methods |
Jul. 21, 1992 |
| 5109935 |
Rotary drill bits |
May. 5, 1992 |
| 5099934 |
Rotary drill bits |
Mar. 31, 1992 |
| 5042596 |
Imbalance compensated drill bit |
Aug. 27, 1991 |
| 5020608 |
Device for boring holes in the ground |
Jun. 4, 1991 |
| 4989681 |
Drill bit for producing undercuts |
Feb. 5, 1991 |
| 4982802 |
Method for stabilizing a rotary drill string and drill bit |
Jan. 8, 1991 |
| 4768599 |
Drill bit for undercutting a blind bore |
Sep. 6, 1988 |
| 4620600 |
Drill arrangement |
Nov. 4, 1986 |
| 4266621 |
Well casing window mill |
May. 12, 1981 |
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