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Class Information
Number: 175/382
Name: Boring or penetrating the earth > Bit or bit element > Adjustable cutter element
Description: Apparatus in which the bit is provided with a movable cutter element and means to selectively hold said cutter element in different positions with respect to the bit head.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7341116 |
Drilling efficiency through beneficial management of rock stress levels via controlled oscillations of subterranean cutting elements |
Mar. 11, 2008 |
| 7337858 |
Drill bit assembly adapted to provide power downhole |
Mar. 4, 2008 |
| 7195079 |
Directional reaming system |
Mar. 27, 2007 |
| 7055632 |
Well stimulation tool and method for inserting a backpressure plug through a mandrel of the tool |
Jun. 6, 2006 |
| 6607046 |
Expandable drill bit |
Aug. 19, 2003 |
| 6142250 |
Rotary drill bit having moveable formation-engaging members |
Nov. 7, 2000 |
| 5027914 |
Pilot casing mill |
Jul. 2, 1991 |
| 5004056 |
Percussion-rotary drilling tool |
Apr. 2, 1991 |
| 4974688 |
Steerable earth boring device |
Dec. 4, 1990 |
| 4923021 |
Combination bit for coking oven |
May. 8, 1990 |
| 4842337 |
Mining bit and holder |
Jun. 27, 1989 |
| 4690228 |
Changeover bit for extended life, varied formations and steady wear |
Sep. 1, 1987 |
| 4610318 |
Rotary cutter assembly |
Sep. 9, 1986 |
| 4456075 |
Weeding auger with U-shaped blade |
Jun. 26, 1984 |
| 4278296 |
Coal mining drum with adjustable linier edge cutters |
Jul. 14, 1981 |
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