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Class Information
Number: 175/325.2
Name: Boring or penetrating the earth > With tool shaft detail > Shaft carried guide or protector > Coupled between shaft sections or bit and shaft section
Description: Apparatus where the guide or protecting means is (1) a discrete device connecting two axially spaced shaft sections or (2) a shaft section and a bit in which the tool shaft or portion is specifically adapted to hold the bore wall guide or protector means.










Sub-classes under this class:

Class Number Class Name Patents
175/325.4 Having removable inserts 89
175/325.3 With bore wall engaging means rotatable relative to shaft section (e.g., with bearings) 125


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8640792 Flexible directional drilling apparatus and related methods Feb. 4, 2014
8561692 Downhole safety joint Oct. 22, 2013
8561725 Ultra-hard drill collar Oct. 22, 2013
8556542 Cuttable drilling tool, and a cuttable self drilling rock bolt Oct. 15, 2013
8550189 Drive pin support Oct. 8, 2013
8448722 Drilling stabilizer May. 28, 2013
8393417 Apparatus and methods to optimize fluid flow and performance of downhole drilling equipment Mar. 12, 2013
8336645 Drilling cuttings mobilizer and method for use Dec. 25, 2012
8297381 Stabilizer subs for use with expandable reamer apparatus, expandable reamer apparatus including stabilizer subs and related methods Oct. 30, 2012
8225884 Rotor underreamer, section mill, casing cutter, casing scraper and drill string centralizer Jul. 24, 2012
8162081 Force balanced asymmetric drilling reamer and methods for force balancing Apr. 24, 2012
8083011 Matrix turbine sleeve and method for making same Dec. 27, 2011
8025107 Reamer with polycrystalline diamond compact inserts Sep. 27, 2011
8011429 Transport assembly Sep. 6, 2011
8002043 Slotted thread protection device Aug. 23, 2011
7980597 External protection for expandable threaded tubular connections Jul. 19, 2011
7954566 Stabilizer for drill strings Jun. 7, 2011
7900720 Downhole drive shaft connection Mar. 8, 2011
7878273 Ultra-hard drilling stabilizer Feb. 1, 2011
7802638 Drive system Sep. 28, 2010
7798252 Method and apparatus for providing a continuous stroke auger boring machine Sep. 21, 2010
7798253 Method and apparatus for controlling precession in a drilling assembly Sep. 21, 2010
7665548 Secondary retainer for a downhole hammer bit Feb. 23, 2010
7654341 Drill stem coupling and method for a directional drill Feb. 2, 2010
7343989 Secondary retainer for a downhole hammer bit Mar. 18, 2008
7267185 Bit retainer system Sep. 11, 2007
7216726 Downhole fluid-tight flexible joint May. 15, 2007
7083010 Apparatus and method for drilling and reaming a borehole Aug. 1, 2006
7028788 Wear sleeve Apr. 18, 2006
7013992 Borehole stabilization while drilling Mar. 21, 2006
6997271 Drilling string torsional energy control assembly and method Feb. 14, 2006
6981560 Method and apparatus for treating a productive zone while drilling Jan. 3, 2006
6929076 Bore hole underreamer having extendible cutting arms Aug. 16, 2005
6892832 Breakable washer earth boring bit May. 17, 2005
6776247 Stabilizer tool block wear pad assembly Aug. 17, 2004
6681871 Auger tool for boring Jan. 27, 2004
6655462 Magnetic well cleaning apparatus Dec. 2, 2003
6540034 Portable seismic shothole drilling system Apr. 1, 2003
6464013 Oil well casing centralizer coupling Oct. 15, 2002
6446739 Rock drill bit with neck protection Sep. 10, 2002
6439324 Electrically insulating gap subassembly for downhole electromagnetic transmission Aug. 27, 2002
6371224 Threaded spacer Apr. 16, 2002
6364034 Directional drilling apparatus Apr. 2, 2002
6325162 Bit connector Dec. 4, 2001
6250406 Connection arrangement for a two-piece annular body Jun. 26, 2001
6213229 Drilling motor drill bit reaming stabilizer Apr. 10, 2001
6202752 Wellbore milling methods Mar. 20, 2001
6173797 Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability Jan. 16, 2001
6161635 Drilling system drive steel Dec. 19, 2000
6148933 Steering device for bottomhole drilling assemblies Nov. 21, 2000

1 2 3 4










 
 
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