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Class Information
Number: 175/4
Name: Boring or penetrating the earth > Boring with explosion in inaccessible hole > Driving core receiver by explosion or with receptacle collecting material in bore
Description: Subject matter directed to an explosive apparatus which includes or is combined with (1) a core receiving barrel or tube which is propelled into the formation by an explosive charge or (2) a receptacle or the like which is described as adapted to collect and remove a sample of the formation from the hole.

Patents under this class:

Patent Number Title Of Patent Date Issued
8322463 Down hole multiple piston tools operated by pulse generation tools and methods for drilling Dec. 4, 2012
8230946 Apparatus and methods for sidewall percussion coring using a voltage activated igniter Jul. 31, 2012
7441601 Perforation gun with integral debris trap apparatus and method of use Oct. 28, 2008
6976392 Atomic clock for downhole applications Dec. 20, 2005
6845825 Method and apparatus for attaching/detaching drill rod Jan. 25, 2005
6837105 Atomic clock for downhole applications Jan. 4, 2005
6681873 Core stabilization apparatus and method therefor Jan. 27, 2004
5445228 Method and apparatus for formation sampling during the drilling of a hydrocarbon well Aug. 29, 1995
5031536 High temperature and pressure igniter for downhole percussion coring guns Jul. 16, 1991
4993503 Horizontal boring apparatus and method Feb. 19, 1991
4979576 Percussion core gun construction and cable arrangement Dec. 25, 1990
4827823 Bullet firing mechanism with retrieval cable May. 9, 1989
4750570 Formation sampling bullet and cables therefor Jun. 14, 1988
4702327 Core sample taking bullet construction Oct. 27, 1987
4665791 Method for accelerating an object and propelling arrangement for implementing the method for such object, particularly an object to be driven into ground below water May. 19, 1987
4609056 Sidewall core gun Sep. 2, 1986
4569403 Formation sampling bullet Feb. 11, 1986
4339947 Downhole sampling method and apparatus Jul. 20, 1982
4280568 Sidewall sampling apparatus Jul. 28, 1981
4220212 Apparatus for monitoring the operation of well bore guns Sep. 2, 1980

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