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Class Information
Number: 175/228
Name: Boring or penetrating the earth > With storage means for bit lubricant carried by bit or shaft > With fluid pressure-actuated feed means
Description: Apparatus in which the friction reducing fluid is supplied or fed to the cutter or a portion thereof by a fluid pressure or fluid flow operated means usually the fluid pressure or flow of the drilling fluid.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8383559 Releasable corrosion inhibitors Feb. 26, 2013
8347986 Roller cone drill bit with lubricant pressure relief mechanism and method Jan. 8, 2013
8141662 Downhole lubrication system Mar. 27, 2012
8069934 Drill bits for drilling wells Dec. 6, 2011
8020637 Downhole lubrication system Sep. 20, 2011
7975782 Earth bit having a pressure relief valve Jul. 12, 2011
7665547 Drill bit reservoir with controllable relief pressure Feb. 23, 2010
7530409 Rotary roller reamer May. 12, 2009
7240745 Drill bit lubrication apparatus and method Jul. 10, 2007
7237627 Bearing and lubrication system for earth boring bit Jul. 3, 2007
7128171 Hydrodynamic pump passages for rolling cone drill bit Oct. 31, 2006
7121365 Rock bit with grease composition utilizing polarized graphite Oct. 17, 2006
6802380 Pressure relief system and methods of use and making Oct. 12, 2004
6789634 Self-lubricating elastomeric seal with polarized graphite Sep. 14, 2004
6619412 Protected lubricant reservoir for sealed earth boring drill bit Sep. 16, 2003
6595281 Apparatus for delivering a flowable substance to a remote location Jul. 22, 2003
6578647 Sealing structure for a rock drill bit Jun. 17, 2003
6568489 Apparatus and method for downhole lubrication replenishment May. 27, 2003
6561269 Canister, sealing method and composition for sealing a borehole May. 13, 2003
6390209 Roller cone drill bit with improved pressure compensation May. 21, 2002
6296067 Protected lubricant reservoir for sealed bearing earth boring drill bit Oct. 2, 2001
6230822 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations May. 15, 2001
6213228 Roller cone drill bit with improved pressure compensation Apr. 10, 2001
6209667 Drill string fitting Apr. 3, 2001
6206110 Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit Mar. 27, 2001
6202766 Relief valve Mar. 20, 2001
6170611 Method and apparatus for loading lubricant into earth boring bits Jan. 9, 2001
6138778 Rock bit lubricant relief valve Oct. 31, 2000
6116357 Rock drill bit with back-reaming protection Sep. 12, 2000
6092611 Encapsulated elastomeric relief valve Jul. 25, 2000
6056072 Lubricating grease May. 2, 2000
5984024 Cutter, a stopper means and a method of preventing mud from entering into a cutter Nov. 16, 1999
5927439 Sub-assembly for lubricating rock drill bit Jul. 27, 1999
5904211 Disc cutter and excavation equipment May. 18, 1999
5839523 Methods and apparatus for lubricating a rotary cutter Nov. 24, 1998
5668092 Rock bit grease composition Sep. 16, 1997
5589443 Rock bit grease composition Dec. 31, 1996
5577565 Compact roller cutter Nov. 26, 1996
5558172 Earth boring bit and lubricator compensation therefor Sep. 24, 1996
5490570 Earth boring bit and lubricator/compensator therefor Feb. 13, 1996
5485890 Rock bit Jan. 23, 1996
5456327 O-ring seal for rock bit bearings Oct. 10, 1995
5441120 Roller cone rock bit having a sealing system with double elastomer seals Aug. 15, 1995
5402858 O-ring seal for rock bit bearings Apr. 4, 1995
5377771 Sealed bearing assembly used in earth drilling Jan. 3, 1995
5363930 Dual-diaphragm lubricant compensator for earth-boring bits Nov. 15, 1994
5199516 Modular drill bit Apr. 6, 1993
5183123 Indicating means for a rock bit lubricating system Feb. 2, 1993
5152353 High speed rock bit Oct. 6, 1992
5137097 Modular drill bit Aug. 11, 1992

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