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Class Information
Number: 175/4.57
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > Projectile forms bore
Description: Subject matter comprising an apparatus or process for firing a missile.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6978848 |
Method and apparatus for penetrating subsurface formations |
Dec. 27, 2005 |
| 6591911 |
Multi-directional gun carrier method and apparatus |
Jul. 15, 2003 |
| 6523449 |
Perforating gun |
Feb. 25, 2003 |
| 6000479 |
Slimhole drill system |
Dec. 14, 1999 |
| 5633475 |
Circulation shaped charge |
May. 27, 1997 |
| 5168939 |
Electromagnetically accelerated impact oil well drill |
Dec. 8, 1992 |
| 4997047 |
High speed electromagnetically accelerated earth drill |
Mar. 5, 1991 |
| 4951744 |
Angularly shaped unitary structured base strip comprised of a specific material adapted for phasing charges in a perforating gun |
Aug. 28, 1990 |
| 4909152 |
Cartridge for the expulsion of liquids under pressure |
Mar. 20, 1990 |
| 4790383 |
Method and apparatus for multi-zone casing perforation |
Dec. 13, 1988 |
| 4638712 |
Bullet perforating apparatus, gun assembly and barrel |
Jan. 27, 1987 |
| 4419935 |
Explosive charging apparatus for charging explosive pellets to a bore in a rock |
Dec. 13, 1983 |
| 4220212 |
Apparatus for monitoring the operation of well bore guns |
Sep. 2, 1980 |
| 4193460 |
Perforating gun with paired shaped charger vertically spaced |
Mar. 18, 1980 |
| 4106574 |
Method for establishing high permeability flow path between boreholes |
Aug. 15, 1978 |
| 4099567 |
Generating medium BTU gas from coal in situ |
Jul. 11, 1978 |
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