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Class Information
Number: 175/267
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by fluid pressure
Description: Apparatus in which the laterally movable cutter element is moved laterally by means of a fluid under pressure acting against the cutter element or a below ground part attached thereto.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5174374 |
Clean-out tool cutting blade |
Dec. 29, 1992 |
| 5141063 |
Restriction enhancement drill |
Aug. 25, 1992 |
| 5107943 |
Method and apparatus for gravel packing of wells |
Apr. 28, 1992 |
| 5103921 |
Coring assembly for mounting on the end of a drill string |
Apr. 14, 1992 |
| 5090480 |
Underreamer with simultaneously expandable cutter blades and method |
Feb. 25, 1992 |
| 5074366 |
Method and apparatus for horizontal drilling |
Dec. 24, 1991 |
| 5060738 |
Three-blade underreamer |
Oct. 29, 1991 |
| 5060736 |
Steerable tool underreaming system |
Oct. 29, 1991 |
| 5036921 |
Underreamer with sequentially expandable cutter blades |
Aug. 6, 1991 |
| 4976323 |
Counterboring device for wells |
Dec. 11, 1990 |
| 4971163 |
Drilling bucket apparatus for cast-in-place piles with expanded bottoms |
Nov. 20, 1990 |
| 4915181 |
Tubing bit opener |
Apr. 10, 1990 |
| 4889197 |
Hydraulic operated underreamer |
Dec. 26, 1989 |
| 4875738 |
Arm-supported cutting roll with effective length pivotally adjustable along mining face |
Oct. 24, 1989 |
| 4809793 |
Enhanced diameter clean-out tool and method |
Mar. 7, 1989 |
| 4715440 |
Downhole tools |
Dec. 29, 1987 |
| 4618009 |
Reaming tool |
Oct. 21, 1986 |
| 4616720 |
Divided-bucket type rotary excavator |
Oct. 14, 1986 |
| 4589504 |
Well bore enlarger |
May. 20, 1986 |
| 4548282 |
Method for sinking boreholes |
Oct. 22, 1985 |
| 4489985 |
Cutter drum extension latching mechanism |
Dec. 25, 1984 |
| 4407376 |
Under-reaming pile bore excavator |
Oct. 4, 1983 |
| 4406500 |
Cutting assembly including expanding wall segments of auger |
Sep. 27, 1983 |
| 4401171 |
Underreamer with debris flushing flow path |
Aug. 30, 1983 |
| 4366988 |
Sonic apparatus and method for slurry well bore mining and production |
Jan. 4, 1983 |
| 4354560 |
Apparatus for drilling enlarged boreholes |
Oct. 19, 1982 |
| 4354559 |
Enlarged borehole drilling method and apparatus |
Oct. 19, 1982 |
| 4316635 |
Extensible and retraciable rotor arm cutting assembly |
Feb. 23, 1982 |
| 4311343 |
Apparatus for breaking rock or concrete |
Jan. 19, 1982 |
| 4282941 |
Underreamer with large cutter elements and axial fluid passage |
Aug. 11, 1981 |
| 4282941 |
Underreamer with large cutter elements and axial fluid passage |
Aug. 11, 1981 |
| 4278137 |
Apparatus for extracting minerals through a borehole |
Jul. 14, 1981 |
| 4262758 |
Borehole angle control by gage corner removal from mechanical devices associated with drill bit and drill string |
Apr. 21, 1981 |
| 4219087 |
Enlarged bore hole drilling method |
Aug. 26, 1980 |
| 4189185 |
Method for producing chambered blast holes |
Feb. 19, 1980 |
| 4187920 |
Enlarged bore hole drilling method and apparatus |
Feb. 12, 1980 |
| 4186810 |
Fluid operated undercutter |
Feb. 5, 1980 |
| 4169510 |
Drilling and belling apparatus |
Oct. 2, 1979 |
| 4165784 |
Casing perforator |
Aug. 28, 1979 |
| 4081042 |
Stabilizer and rotary expansible drill bit apparatus |
Mar. 28, 1978 |
| 3938598 |
Belling apparatus |
Feb. 17, 1976 |
| 3934660 |
Flexpower deep well drill |
Jan. 27, 1976 |
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