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Class Information
Number: 175/325.5
Name: Boring or penetrating the earth > With tool shaft detail > Shaft carried guide or protector > Surrounding existing shaft section
Description: Apparatus where the guide or protector encircles and is secured to the shaft.










Sub-classes under this class:

Class Number Class Name Patents
175/325.6 Held by a fastener parallel to shaft axis 23
175/325.7 Held by discrete fastening means tangential to shaft axis 21


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8678096 Composite bow centralizer Mar. 25, 2014
8662166 Low clearance centralizer Mar. 4, 2014
8622153 Downhole assembly Jan. 7, 2014
8443882 Wellbore centralizer for tubulars May. 21, 2013
8397840 Replaceable wear band for well drill pipe Mar. 19, 2013
8336645 Drilling cuttings mobilizer and method for use Dec. 25, 2012
8245777 Tubing centralizer Aug. 21, 2012
8225864 Well string centralizer and method of forming Jul. 24, 2012
8225885 Joint for use in back reaming Jul. 24, 2012
8225868 Apparatus and method for mounting acoustic sensors closer to a borehole wall Jul. 24, 2012
8196654 Expandable centralizer for expandable pipe string Jun. 12, 2012
8167034 Device for centering a well casing May. 1, 2012
8141629 Well string centralizer and method of forming Mar. 27, 2012
8074712 Stop collar friction clamping device Dec. 13, 2011
8066066 Borehole casing centraliser Nov. 29, 2011
8011429 Transport assembly Sep. 6, 2011
7954566 Stabilizer for drill strings Jun. 7, 2011
7954567 Adjustable winged centering tool for use in pipes with varying diameter Jun. 7, 2011
7946359 Methods and apparatus for well construction May. 24, 2011
7918274 Downhole tools Apr. 5, 2011
7878241 Expandable centralizer for expandable pipe string Feb. 1, 2011
7857078 Cutting tools and methods of making the same Dec. 28, 2010
7798253 Method and apparatus for controlling precession in a drilling assembly Sep. 21, 2010
7793717 Progressive cavity pump rod guide Sep. 14, 2010
7681665 Downhole hydraulic control system Mar. 23, 2010
7654341 Drill stem coupling and method for a directional drill Feb. 2, 2010
7654345 Wear resistant sub assembly Feb. 2, 2010
7650952 Passive vertical drilling motor stabilization Jan. 26, 2010
7624798 Centralizer for expandable tubulars Dec. 1, 2009
7604059 Downhole tools Oct. 20, 2009
7600587 Wear resistant sleeve for sub assembly Oct. 13, 2009
7546879 Flow control device Jun. 16, 2009
7520340 Method of avoiding the need for a scraper run in drill out operations and a downhole drilling motor assembly Apr. 21, 2009
7520344 Wear resistant collar for sub assembly Apr. 21, 2009
7412761 Method of creating a sleeve on tubing Aug. 19, 2008
7409758 Vibration damper systems for drilling with casing Aug. 12, 2008
7392861 Stabilizer for a rod, particularly a string of drilling rods Jul. 1, 2008
7389831 Dual-member auger boring system Jun. 24, 2008
7357178 In and relating to downhole tools Apr. 15, 2008
7347286 Drill string valve assembly Mar. 25, 2008
7320363 Energized slip ring assembly Jan. 22, 2008
7308955 Stabilizer arrangement Dec. 18, 2007
7299886 Stabilized down hole drilling motor Nov. 27, 2007
7182161 Drill string tool with bearing sleeve Feb. 27, 2007
7172025 System for lining a section of a wellbore Feb. 6, 2007
7143825 Expandable wellbore stabiliser Dec. 5, 2006
7140431 Centraliser for an expandable tubular element in a wellbore Nov. 28, 2006
7128170 Adjustable stabiliser for directional drilling Oct. 31, 2006
7124825 Casing wear band and method of attachment Oct. 24, 2006
7082997 Pipe centralizer and method of attachment Aug. 1, 2006

1 2 3










 
 
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