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Class Information
Number: 175/246
Name: Boring or penetrating the earth > With means movable relative to tool to receive, retain, or sever undisturbed core > Receiver removable through below-ground tool shaft
Description: Apparatus in which the movable means comprises a structure adapted to cooperate with a tool and hollow tool shaft to receive a core as it is taken, said structure and core then being readily lifted above ground through the center of the tool shaft while the tool shaft remains in the borehole.










Sub-classes under this class:

Class Number Class Name Patents
175/248 Core forming cutting edge or element on receiver 16
175/247 With fluid pressure-responsive means to remove receiver or operate latch 9


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8668029 Sonic latch mechanism Mar. 11, 2014
8485280 Core drilling tools with retractably lockable driven latch mechanisms Jul. 16, 2013
8333255 High productivity core drilling system Dec. 18, 2012
8272457 Detachable latch head for core drilling Sep. 25, 2012
8261857 Core barrel sonic latch mechanism and methods of sonic drilling using the same Sep. 11, 2012
8176998 Method and device for core drilling May. 15, 2012
8051925 Core barrel assemblies with braking devices Nov. 8, 2011
7431107 Coring bit with uncoupled sleeve Oct. 7, 2008
7383899 Spearhead assembly Jun. 10, 2008
7314101 Inner core barrel head assembly for core tube within a drill string Jan. 1, 2008
7293613 Logging-while-coring method and apparatus Nov. 13, 2007
7168508 Logging-while-coring method and apparatus Jan. 30, 2007
7117939 Percussion hammer bit retainer apparatus Oct. 10, 2006
6820703 Locking device for a wire line core drilling system and a method for core drilling Nov. 23, 2004
6659204 Method and apparatus for recovering core samples under pressure Dec. 9, 2003
6425449 Up-hole pump-in core barrel apparatus Jul. 30, 2002
6378631 Apparatus for recovering core samples at in situ conditions Apr. 30, 2002
6230825 Apparatus for recovering core samples under pressure May. 15, 2001
6216804 Apparatus for recovering core samples under pressure Apr. 17, 2001
6089335 Positive latch core barrel apparatus Jul. 18, 2000
6029758 Retractable core barrel valving apparatus Feb. 29, 2000
6006844 Method and apparatus for simultaneous coring and formation evaluation Dec. 28, 1999
5934393 Core barrel apparatus Aug. 10, 1999
5799742 Core drilling latch assembly Sep. 1, 1998
5601152 Vibrator core drilling apparatus Feb. 11, 1997
5568838 Bit-stabilized combination coring and drilling system Oct. 29, 1996
5450913 Continuous soil sampling system and method Sep. 19, 1995
5351765 Coring assembly and method Oct. 4, 1994
5325930 Overcenter toggle latch apparatus Jul. 5, 1994
5301759 Method and apparatus for core-sampling subsurface rock formations Apr. 12, 1994
5267620 Drilling latch apparatus Dec. 7, 1993
5163522 Angled sidewall coring assembly and method of operation Nov. 17, 1992
5052502 Apparatus for directional coring Oct. 1, 1991
5038873 Drilling tool with retractable pilot drilling unit Aug. 13, 1991
5025872 Core barrel adjusting system Jun. 25, 1991
5020612 Wire line core drilling apparatus Jun. 4, 1991
4955438 Core drilling tool Sep. 11, 1990
4907659 Powered soil-sampler Mar. 13, 1990
4800969 Fast descent core barrel apparatus Jan. 31, 1989
4773489 Core drilling tool for boreholes in rock Sep. 27, 1988
4765414 Corebarrel Aug. 23, 1988
4664204 Fixing mechanism for a wireline core barrel of core drilling equipment May. 12, 1987
4625813 Method and apparatus for coring in subaqueous structures Dec. 2, 1986
4605075 Shrouded core catcher Aug. 12, 1986
4558749 Anti-jamming core barrels Dec. 17, 1985
4518050 Rotating double barrel core sampler May. 21, 1985
4518051 Percussion actuated core sampler May. 21, 1985
4466497 Wireline core barrel Aug. 21, 1984
4418770 Process for retrieving a coring barrel comprising two tubes and retrieving device for such a process Dec. 6, 1983
4371045 Method and apparatus for recovering unstable cores Feb. 1, 1983

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