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Class Information
Number: 175/4.51
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > With position orienting or indicating
Description: Subject matter directed to (1) means to position or aim an explosive charge or projectile relative to a predetermined point or direction in the hole, (2) means to enable an operator at the surface to determine where something (e.g., the explosive charge or projectile) is located in the hole or (3) means to place an indicator (e.g., reference bullet) in the formation or hole wall.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8684083 Perforating gun with rotatable charge tube Apr. 1, 2014
8672031 Perforating with wired drill pipe Mar. 18, 2014
8596378 Perforating safety system and assembly Dec. 3, 2013
8443886 Perforating gun with rotatable charge tube May. 21, 2013
8365814 Pre-verification of perforation alignment Feb. 5, 2013
8186259 Perforating gun gravitational orientation system May. 29, 2012
8181718 Perforating gun gravitational orientation system May. 22, 2012
8127848 Selectively angled perforating Mar. 6, 2012
8066083 System and method for dynamically adjusting the center of gravity of a perforating apparatus Nov. 29, 2011
8028751 Perforation method and apparatus Oct. 4, 2011
7886842 Apparatus and method for orienting a wellbore servicing tool Feb. 15, 2011
7861778 Pressure orienting swivel arrangement and method Jan. 4, 2011
7469745 Apparatus and method to mechanically orient perforating systems in a well Dec. 30, 2008
7409993 Weight spacer apparatus Aug. 12, 2008
7152680 Slickline power control interface Dec. 26, 2006
7114564 Method and apparatus for orienting perforating devices Oct. 3, 2006
7044236 Shot direction indicating device May. 16, 2006
7000699 Method and apparatus for orienting perforating devices and confirming their orientation Feb. 21, 2006
6942033 Optimizing charge phasing of a perforating gun Sep. 13, 2005
6843318 Method and system for determining the position and orientation of a device in a well casing Jan. 18, 2005
6758124 Unique phasings and firing sequences for perforating guns Jul. 6, 2004
6684954 Bi-directional explosive transfer subassembly and method for use of same Feb. 3, 2004
6679327 Internal oriented perforating system and method Jan. 20, 2004
6672405 Perforating gun assembly for use in multi-stage stimulation operations Jan. 6, 2004
6523449 Perforating gun Feb. 25, 2003
6401818 Wellbore perforation method and apparatus Jun. 11, 2002
6386288 Casing conveyed perforating process and apparatus May. 14, 2002
6378607 Method and system for oriented perforating in a well with permanent sensors Apr. 30, 2002
6298915 Orienting system for modular guns Oct. 9, 2001
6283214 Optimum perforation design and technique to minimize sand intrusion Sep. 4, 2001
6173773 Orienting downhole tools Jan. 16, 2001
6032739 Method of locating wellbore casing collars using dual-purpose magnet Mar. 7, 2000
6003599 Azimuth-oriented perforating system and method Dec. 21, 1999
5964294 Apparatus and method for orienting a downhole tool in a horizontal or deviated well Oct. 12, 1999
5816343 Phased perforating guns Oct. 6, 1998
5603379 Bi-directional explosive transfer apparatus and method Feb. 18, 1997
5582248 Reversal-resistant apparatus for tool orientation in a borehole Dec. 10, 1996
5564499 Method and device for slotting well casing and scoring surrounding rock to facilitate hydraulic fractures Oct. 15, 1996
5542480 Perforating gun with retrievable mounting strips Aug. 6, 1996
5477785 Well pipe perforating gun Dec. 26, 1995
5273121 Intercarrier mechanism for connecting and orienting tubing conveyed perforating guns Dec. 28, 1993
5259466 Method and apparatus for orienting a perforating string Nov. 9, 1993
5211714 Wireline supported perforating gun enabling oriented perforations May. 18, 1993
5177321 Apparatus for severing tubular members Jan. 5, 1993
5107927 Orienting tool for slant/horizontal completions Apr. 28, 1992
5044437 Method and device for performing perforating operations in a well Sep. 3, 1991
5040619 Wireline supported perforating gun enabling oriented perforations Aug. 20, 1991
5033553 Intra-perforating gun swivel Jul. 23, 1991
5010964 Method and apparatus for orienting wellbore perforations Apr. 30, 1991
4974672 Gravel packing system for a production radial tube Dec. 4, 1990

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