Boring with explosion in inaccessible hole > Patents

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Class Information
Number: 175/2
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole
Description: Process or apparatus comprising subject matter directed to exploding a charge in an inaccessible hole to directly attack the formation or to propel an object such as a bullet into the formation.

Sub-classes under this class:

Class Number	Class Name	Patents
175/4.6	Concave-shaped charge	170
175/4.5	Directing successive projectiles or charges in same path	19
175/4	Driving core receiver by explosion or with receptacle collecting material in bore	18
175/3.5	Explosive charge carried by projectile	3
175/4.53	Firing chamber movable in bore relative to carrier or another firing chamber	11
175/4.56	Firing control mechanically actuated in bore	95
175/4.55	Independent firing of plural charges	50
175/4.57	Projectile forms bore	16
175/3	Severing formed core by explosion	1
175/4.54	With bore condition firing control, or compensating means	82
175/4.51	With position orienting or indicating	64
175/4.52	With wall engaging packer or anchor	86

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7284489	Casing conveyed well perforating apparatus and method	Oct. 23, 2007
7284601	Casing conveyed well perforating apparatus and method	Oct. 23, 2007
7246548	Well perforating gun	Jul. 24, 2007
7121340	Method and apparatus for reducing pressure in a perforating gun	Oct. 17, 2006
7055421	Well perforating gun	Jun. 6, 2006
7013988	Method and apparatus for moving a mass	Mar. 21, 2006
6966378	Method and apparatus for perforating a well	Nov. 22, 2005
6926096	Method for using a well perforating gun	Aug. 9, 2005
6865978	Well perforating gun	Mar. 15, 2005
6772105	Blasting method	Aug. 3, 2004
6454359	Method for blasting tunnels using an air bladder	Sep. 24, 2002
6371219	Oilwell perforator having metal loaded polymer matrix molded liner and case	Apr. 16, 2002
6257353	Horizontal drilling method and apparatus	Jul. 10, 2001
5996709	Projectile assisted drill for seismic operations	Dec. 7, 1999
5765923	Cartridge for generating high-pressure gases in a drill hole	Jun. 16, 1998
5436791	Perforating gun using an electrical safe arm device and a capacitor exploding foil initiator device	Jul. 25, 1995
5421418	Apparatus and method for mixing polyacrylamide with brine in an annulus of a wellbore to prevent a cement-like mixture from fouling wellbore tools	Jun. 6, 1995
5237136	Hydrostatic pressure responsive bypass safety switch	Aug. 17, 1993
5192819	Bulk explosive charger	Mar. 9, 1993
5020591	Oil tool coupling device	Jun. 4, 1991
4967048	Safety switch for explosive well tools	Oct. 30, 1990
4909152	Cartridge for the expulsion of liquids under pressure	Mar. 20, 1990
4550786	Method of driving steel profiles into a rock substratum	Nov. 5, 1985
4526233	Releasable coupling for tubing conveyed subterranean well perforating gun	Jul. 2, 1985
4165690	Drill units for drilling and charge laying operations and method of carrying out the operations	Aug. 28, 1979
4123975	Penetrating projectile system and apparatus	Nov. 7, 1978
4057780	Method for describing fractures in subterranean earth formations	Nov. 8, 1977