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Class Information
Number: 175/4.52
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > With wall engaging packer or anchor
Description: Subject matter directed to means engaging the hole wall or a tubular member in the hole to (1) block fluid flow between the explosive apparatus and the hole wall or member or (2) attach the explosive apparatus to the hole wall or other wall in the hole so as to resist the action of gravity or a lifting force.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7325620 |
Recoverable, reinforced and vibration-damping plug used for cased wells |
Feb. 5, 2008 |
| 7258054 |
Continuous explosive charge assembly for use in an elongated cavity |
Aug. 21, 2007 |
| 6901865 |
Primer casing and method of charging a blasthole |
Jun. 7, 2005 |
| 6805056 |
Method and apparatus for removing abandoned tubular members |
Oct. 19, 2004 |
| 6722251 |
Method for loading a continuous explosive charge assembly in an elongated cavity |
Apr. 20, 2004 |
| 6672405 |
Perforating gun assembly for use in multi-stage stimulation operations |
Jan. 6, 2004 |
| 6595289 |
Method and apparatus for plugging a wellbore |
Jul. 22, 2003 |
| 6564686 |
Continuous explosive charge assembly and method for loading same in an elongated cavity |
May. 20, 2003 |
| 6502631 |
Reinforced borehole plugs |
Jan. 7, 2003 |
| 6386288 |
Casing conveyed perforating process and apparatus |
May. 14, 2002 |
| 6220370 |
Circulating gun system |
Apr. 24, 2001 |
| 6142231 |
One-trip conveying method for packer/plug and perforating gun |
Nov. 7, 2000 |
| 6032739 |
Method of locating wellbore casing collars using dual-purpose magnet |
Mar. 7, 2000 |
| 5816747 |
Device for cutting a large diameter pipe and initiation manifold therefor |
Oct. 6, 1998 |
| 5777257 |
Shaped charge assembly with truncated liner |
Jul. 7, 1998 |
| 5704426 |
Zonal isolation method and apparatus |
Jan. 6, 1998 |
| 5611401 |
One-trip conveying method for packer/plug and perforating gun |
Mar. 18, 1997 |
| 5598894 |
Select fire multiple drill string tester |
Feb. 4, 1997 |
| 5429192 |
Method and apparatus for anchoring a perforating gun to a casing in a wellbore including a primary and a secondary anchor release mechanism |
Jul. 4, 1995 |
| 5423382 |
Apparatus for releasing perforating gun equipment from a well casing |
Jun. 13, 1995 |
| 5370186 |
Apparatus and method of perforating wellbores |
Dec. 6, 1994 |
| 5353875 |
Methods of perforating and testing wells using coiled tubing |
Oct. 11, 1994 |
| 5295544 |
Decentralized casing hole puncher |
Mar. 22, 1994 |
| 5211224 |
Annular shaped power charge for subsurface well devices |
May. 18, 1993 |
| 5191933 |
Wellbore apparatus including a rathole pressure balanced-differential pressure firing system |
Mar. 9, 1993 |
| 5191936 |
Method and apparatus for controlling a well tool suspended by a cable in a wellbore by selective axial movements of the cable |
Mar. 9, 1993 |
| 5156213 |
Well completion method and apparatus |
Oct. 20, 1992 |
| 5131470 |
Shock energy absorber including collapsible energy absorbing element and break up of tensile connection |
Jul. 21, 1992 |
| 5131472 |
Overbalance perforating and stimulation method for wells |
Jul. 21, 1992 |
| 5111885 |
Decentralized casing hole puncher |
May. 12, 1992 |
| 5103912 |
Method and apparatus for completing deviated and horizontal wellbores |
Apr. 14, 1992 |
| 5103911 |
Method and apparatus for perforating a well liner and for fracturing a surrounding formation |
Apr. 14, 1992 |
| 5090325 |
Tunnel driving method |
Feb. 25, 1992 |
| 5067568 |
Well perforating gun |
Nov. 26, 1991 |
| 5044437 |
Method and device for performing perforating operations in a well |
Sep. 3, 1991 |
| 5042593 |
Hydraulically damped detonator for use in perforating oil well tubing |
Aug. 27, 1991 |
| 5016716 |
Tubing carried perforating gun with insulation jacket |
May. 21, 1991 |
| 4969525 |
Firing head for a perforating gun assembly |
Nov. 13, 1990 |
| 4924952 |
Detonating heads |
May. 15, 1990 |
| 4917187 |
Method and apparatus for hydraulically firing a perforating gun below a set packer |
Apr. 17, 1990 |
| 4901802 |
Method and apparatus for perforating formations in response to tubing pressure |
Feb. 20, 1990 |
| 4886126 |
Method and apparatus for firing a perforating gun |
Dec. 12, 1989 |
| 4862964 |
Method and apparatus for perforating well bores using differential pressure |
Sep. 5, 1989 |
| 4817718 |
Hydraulically activated firing head for well perforating guns |
Apr. 4, 1989 |
| 4804044 |
Perforating gun firing tool and method of operation |
Feb. 14, 1989 |
| RE32755 |
Accelerated downhole pressure testing |
Sep. 27, 1988 |
| 4756371 |
Perforation apparatus and method |
Jul. 12, 1988 |
| 4739839 |
Capsule charge perforating system |
Apr. 26, 1988 |
| 4708200 |
Apparatus for maintaining clean fluid in a chamber in a subterranean well tool |
Nov. 24, 1987 |
| 4693317 |
Method and apparatus for absorbing shock |
Sep. 15, 1987 |
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