| |
 |
|
Class Information
Number: 175/406
Name: Boring or penetrating the earth > Bit or bit element > Noncutting portion forwardly of cutting portion (e.g., reamer)
Description: Apparatus in which the cutter element or cutting edge is carried on a bit which has a portion extending inwardly towards the axis of the bit and forwardly of the cutter element or cutting edge in the direction of boring and which has no cutting function.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5853054 |
2-Stage underreamer |
Dec. 29, 1998 |
| 5778992 |
Drilling assembly for drilling holes in subsurface formations |
Jul. 14, 1998 |
| 5687805 |
Back reamer apparatus |
Nov. 18, 1997 |
| 5687807 |
Cutter head for trenchless boring machine |
Nov. 18, 1997 |
| 5590724 |
Underreaming method |
Jan. 7, 1997 |
| 5485888 |
Spherical reaming bit |
Jan. 23, 1996 |
| 5413183 |
Spherical reaming bit |
May. 9, 1995 |
| 5402856 |
Anti-whirl underreamer |
Apr. 4, 1995 |
| 5390750 |
Downhole compaction and stabilization back reamer and drill bit |
Feb. 21, 1995 |
| 5368114 |
Under-reaming tool for boreholes |
Nov. 29, 1994 |
| 5366029 |
Large shaft over-reamer apparatus and method |
Nov. 22, 1994 |
| 5220964 |
Downhole compaction and stabilization back reamer and drill bit |
Jun. 22, 1993 |
| 5181564 |
Milling tool |
Jan. 26, 1993 |
| 5176211 |
Apparatus and method for recirculating mud when drilling under an obstacle |
Jan. 5, 1993 |
| 5131480 |
Rotary cone milled tooth bit with heel row cutter inserts |
Jul. 21, 1992 |
| 5074356 |
Milling tool and combined stabilizer |
Dec. 24, 1991 |
| 5060738 |
Three-blade underreamer |
Oct. 29, 1991 |
| 5027914 |
Pilot casing mill |
Jul. 2, 1991 |
| 5014780 |
Long distance section mill for pipe in a borehole |
May. 14, 1991 |
| 5010967 |
Milling apparatus with replaceable blades |
Apr. 30, 1991 |
| 4989681 |
Drill bit for producing undercuts |
Feb. 5, 1991 |
| 4784230 |
Apparatus and method for installing a conduit within an arcuate bore |
Nov. 15, 1988 |
| 4765417 |
Reaming apparatus for well drilling |
Aug. 23, 1988 |
| 4709462 |
Method for assembling a well drilling tool |
Dec. 1, 1987 |
| 4700789 |
Device to obtain ring-shaped cavities in the bottom of drilled holes made in any type of medium |
Oct. 20, 1987 |
| 4630694 |
Integral blade hole opener |
Dec. 23, 1986 |
| 4589504 |
Well bore enlarger |
May. 20, 1986 |
| 4557339 |
Borehole conditioning apparatus |
Dec. 10, 1985 |
| 4549613 |
Downhole tool with replaceable tool sleeve sections |
Oct. 29, 1985 |
| 4548284 |
Roller ball retention of reamer cutter assembly |
Oct. 22, 1985 |
| 4476943 |
Drilling equipment with adaptor for steering long boreholes |
Oct. 16, 1984 |
| 4461362 |
Mining drill with apertures and collars providing for flow of debris |
Jul. 24, 1984 |
| 4456082 |
Expandable rock bit |
Jun. 26, 1984 |
| 4449595 |
Method and apparatus for drilling a curved bore |
May. 22, 1984 |
| 4434944 |
Mass (inductive) reactance vibratory mill or crusher employing mechanical drive force |
Mar. 6, 1984 |
| 4433738 |
Method and apparatus for use when changing the direction of a well bore |
Feb. 28, 1984 |
| 4431065 |
Underreamer |
Feb. 14, 1984 |
| 4378852 |
Wedge lock stabilizer |
Apr. 5, 1983 |
| 4350204 |
Reamer |
Sep. 21, 1982 |
| 4330043 |
Keyseat wiper |
May. 18, 1982 |
| 4285410 |
Broach for incorporation in a drill string |
Aug. 25, 1981 |
| 4285407 |
Straight hole driller |
Aug. 25, 1981 |
| 4190124 |
Stabilizer and blade attachment means therefor |
Feb. 26, 1980 |
| 4082373 |
Tandem roller stabilizer for earth boring apparatus |
Apr. 4, 1978 |
| 4080010 |
Tandem roller stabilizer for earth boring apparatus |
Mar. 21, 1978 |
| 4049067 |
Cutter mounting extension apparatus |
Sep. 20, 1977 |
| 3967689 |
Reaming apparatus |
Jul. 6, 1976 |
|
|
|
