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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:
1 2 3 4

Patent Number Title Of Patent Date Issued
8584772 Shaped charges for creating enhanced perforation tunnel in a well formation Nov. 19, 2013
8561683 Wellbore tubular cutter Oct. 22, 2013
8555764 Perforating gun assembly and method for controlling wellbore pressure regimes during perforating Oct. 15, 2013
8544563 Oil well perforators Oct. 1, 2013
8342094 Dissolvable material application in perforating Jan. 1, 2013
8336437 Perforating gun assembly and method for controlling wellbore pressure regimes during perforating Dec. 25, 2012
8276656 System and method for mitigating shock effects during perforating Oct. 2, 2012
8167044 Shaped charge May. 1, 2012
8074737 Wireless perforating gun initiation Dec. 13, 2011
8061425 System and method for dynamically adjusting the center of gravity of a perforating apparatus Nov. 22, 2011
7997353 Through tubing perforating gun Aug. 16, 2011
7987911 Oil well perforators Aug. 2, 2011
7934558 System and method for dynamically adjusting the center of gravity of a perforating apparatus May. 3, 2011
7913761 System and method for enhanced wellbore perforations Mar. 29, 2011
7909115 Method for perforating utilizing a shaped charge in acidizing operations Mar. 22, 2011
7828051 Perforating gun Nov. 9, 2010
7770662 Ballistic systems having an impedance barrier Aug. 10, 2010
7762351 Exposed hollow carrier perforation gun and charge holder Jul. 27, 2010
7752971 Adapter for shaped charge casing Jul. 13, 2010
7735578 Perforating system with shaped charge case having a modified boss Jun. 15, 2010
7621342 Method for retaining debris in a perforating apparatus Nov. 24, 2009
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
7360599 Debris reduction perforating apparatus and method for use of same Apr. 22, 2008
7360587 Debris reduction perforating apparatus 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

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