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Class Information
Number: 175/325.1
Name: Boring or penetrating the earth > With tool shaft detail > Shaft carried guide or protector
Description: Apparatus in which a means on the tool shaft directs, positions, or shields a drillstring or a portion thereof.










Sub-classes under this class:

Class Number Class Name Patents
175/325.2 Coupled between shaft sections or bit and shaft section 187
175/326 Engaging means advances in adjacent hole 11
175/325.5 Surrounding existing shaft section 126


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8668007 Non-rotating casing centralizer Mar. 11, 2014
8622153 Downhole assembly Jan. 7, 2014
8485278 Methods and apparatuses for inhibiting rotational misalignment of assemblies in expandable well tools Jul. 16, 2013
8448722 Drilling stabilizer May. 28, 2013
8434570 Drill packer member, drill pipe, and corresponding drill pipe string May. 7, 2013
8393417 Apparatus and methods to optimize fluid flow and performance of downhole drilling equipment Mar. 12, 2013
8327953 Drilling tool with feed control Dec. 11, 2012
8205687 Compound engagement profile on a blade of a down-hole stabilizer and methods therefor Jun. 26, 2012
8201645 Downhole tool string component that is protected from drilling stresses Jun. 19, 2012
8162076 System and method for reducing the borehole gap for downhole formation testing sensors Apr. 24, 2012
8082987 Hydraulically locking stabilizer Dec. 27, 2011
8074712 Stop collar friction clamping device Dec. 13, 2011
8066086 Sleeve arrangement Nov. 29, 2011
8011448 Rotary steerable tool Sep. 6, 2011
7946359 Methods and apparatus for well construction May. 24, 2011
7896110 Shoe Mar. 1, 2011
7878272 Forced balanced system Feb. 1, 2011
7861804 Sleeve arrangement Jan. 4, 2011
7845434 Technique for drilling straight bore holes in the earth Dec. 7, 2010
7814996 Spiral ribbed aluminum drillpipe Oct. 19, 2010
7798253 Method and apparatus for controlling precession in a drilling assembly Sep. 21, 2010
7784834 Clamp apparatus for threadedly connected tubulars Aug. 31, 2010
7766101 System and method for making drilling parameter and or formation evaluation measurements during casing drilling Aug. 3, 2010
7721800 Flow control mechanism for a downhole tool May. 25, 2010
7717197 Apparatus for keeping a down hole drilling tool vertically aligned May. 18, 2010
7650951 Resettable actuator for downhole tool Jan. 26, 2010
7556105 Closed loop drilling assembly with electronics outside a non-rotating sleeve Jul. 7, 2009
7487840 Wear resistant layer for downhole well equipment Feb. 10, 2009
7467671 Drill bit with protection member Dec. 23, 2008
7445060 Steerable drill bit arrangement Nov. 4, 2008
7412761 Method of creating a sleeve on tubing Aug. 19, 2008
7392861 Stabilizer for a rod, particularly a string of drilling rods Jul. 1, 2008
7383898 Inner and outer motor with eccentric stabilizer Jun. 10, 2008
7347286 Drill string valve assembly Mar. 25, 2008
7267185 Bit retainer system Sep. 11, 2007
7225887 Method of drilling an ultra-short radius borehole Jun. 5, 2007
7204325 Spring mechanism for downhole steering tool blades Apr. 17, 2007
7143848 Downhole tool Dec. 5, 2006
6907944 Apparatus and method for minimizing wear and wear related measurement error in a logging-while-drilling tool Jun. 21, 2005
6845816 ADI centralizer Jan. 25, 2005
6840337 Method and apparatus for removing cuttings Jan. 11, 2005
6732821 Profiled element for rotary drilling equipment and applications to components of a string of drill pipes May. 11, 2004
6702046 Drill device for a drilling apparatus Mar. 9, 2004
6681875 Guide tube of a drill string configured to facilitate unscrewing thereof from a member of the drill string Jan. 27, 2004
6666285 Logging-while-drilling apparatus and methods for measuring density Dec. 23, 2003
6585052 Casing centralizer Jul. 1, 2003
6516877 Sucker rod protector Feb. 11, 2003
6516900 Apparatus for directional drilling Feb. 11, 2003
6484820 Method and device for driving bore-holes, especially in the sea bed, using a guide tip Nov. 26, 2002
6328119 Adjustable gauge downhole drilling assembly Dec. 11, 2001

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