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Class Information
Number: 175/4.6
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > Concave-shaped charge
Description: Subject matter directed to means in which the explosive charge is hollowed or dished inwardly toward a central point to give a focused pressure to directly attack the formation or a wall member in the hole.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7610969 |
Perforating methods and devices for high wellbore pressure applications |
Nov. 3, 2009 |
| 7493958 |
Technique and apparatus for multiple zone perforating |
Feb. 24, 2009 |
| 7430965 |
Debris retention perforating apparatus and method for use of same |
Oct. 7, 2008 |
| 7360587 |
Debris reduction perforating apparatus |
Apr. 22, 2008 |
| 7360599 |
Debris reduction perforating apparatus and method for use of same |
Apr. 22, 2008 |
| 7350448 |
Perforating apparatus, firing assembly, and method |
Apr. 1, 2008 |
| 7347279 |
Charge holder apparatus |
Mar. 25, 2008 |
| 7278484 |
Techniques and systems associated with perforation and the installation of downhole tools |
Oct. 9, 2007 |
| 7237486 |
Low debris perforating gun system for oriented perforating |
Jul. 3, 2007 |
| 7237487 |
Low debris perforating gun system for oriented perforating |
Jul. 3, 2007 |
| 7216708 |
Reactive stimulation of oil and gas wells |
May. 15, 2007 |
| 7195066 |
Engineered solution for controlled buoyancy perforating |
Mar. 27, 2007 |
| 7165614 |
Reactive stimulation of oil and gas wells |
Jan. 23, 2007 |
| 7159657 |
Shaped charge loading tube for perforating gun |
Jan. 9, 2007 |
| 7117956 |
Pipe conveyed explosive with self contained actuation |
Oct. 10, 2006 |
| 7114564 |
Method and apparatus for orienting perforating devices |
Oct. 3, 2006 |
| 7104326 |
Apparatus and method for severing pipe utilizing a multi-point initiation explosive device |
Sep. 12, 2006 |
| 7000699 |
Method and apparatus for orienting perforating devices and confirming their orientation |
Feb. 21, 2006 |
| 6991044 |
High-energy combined well perforating device |
Jan. 31, 2006 |
| 6877562 |
Oil well perforator |
Apr. 12, 2005 |
| 6851471 |
Perforating gun |
Feb. 8, 2005 |
| 6805056 |
Method and apparatus for removing abandoned tubular members |
Oct. 19, 2004 |
| 6792866 |
Circular shaped charge |
Sep. 21, 2004 |
| 6758124 |
Unique phasings and firing sequences for perforating guns |
Jul. 6, 2004 |
| 6708762 |
Methods and apparatus for forming a lateral wellbore |
Mar. 23, 2004 |
| 6702039 |
Perforating gun carriers and their methods of manufacture |
Mar. 9, 2004 |
| 6675896 |
Detonation transfer subassembly and method for use of same |
Jan. 13, 2004 |
| 6662883 |
Charge tube assembly for a perforating gun |
Dec. 16, 2003 |
| 6619176 |
Thinned-skirt shaped-charge liner |
Sep. 16, 2003 |
| 6557650 |
Method and apparatus for protecting explosives |
May. 6, 2003 |
| 6536525 |
Methods and apparatus for forming a lateral wellbore |
Mar. 25, 2003 |
| 6497285 |
Low debris shaped charge perforating apparatus and method for use of same |
Dec. 24, 2002 |
| 6494139 |
Hole boring charge assembly |
Dec. 17, 2002 |
| 6464019 |
Perforating charge case |
Oct. 15, 2002 |
| 6401818 |
Wellbore perforation method and apparatus |
Jun. 11, 2002 |
| 6397947 |
Optimizing charge phasing of a perforating gun |
Jun. 4, 2002 |
| 6386296 |
Method and apparatus of protecting explosives |
May. 14, 2002 |
| 6347673 |
Perforating guns having multiple configurations |
Feb. 19, 2002 |
| 6336506 |
Apparatus and method for perforating and stimulating a subterranean formation |
Jan. 8, 2002 |
| 6305289 |
Shaped charge for large diameter perforations |
Oct. 23, 2001 |
| 6298924 |
Safety method and apparatus for a perforating gun |
Oct. 9, 2001 |
| 6298913 |
Explosive pipe cutting device |
Oct. 9, 2001 |
| 6283214 |
Optimum perforation design and technique to minimize sand intrusion |
Sep. 4, 2001 |
| 6220355 |
Downhole apparatus |
Apr. 24, 2001 |
| 6158511 |
Apparatus and method for perforating and stimulating a subterranean formation |
Dec. 12, 2000 |
| 6105688 |
Safety method and apparatus for a perforating gun |
Aug. 22, 2000 |
| 6098707 |
Perforation gun for well casing |
Aug. 8, 2000 |
| 6062310 |
Full bore gun system |
May. 16, 2000 |
| 6035784 |
Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole |
Mar. 14, 2000 |
| 6014933 |
Downhole charge carrier |
Jan. 18, 2000 |
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