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Class Information
Number: 175/402
Name: Boring or penetrating the earth > Bit or bit element > Casing shoe type
Description: Apparatus in which the bit is of the type commonly called "casing shoe", and which is adapted to be positioned on the end of a tubular conduit to facilitate the entry of such conduit into a preformed bore by reaming or cutting any projections on the bore wall by means of cutting edges provided on said shoe.

Patents under this class:

Patent Number Title Of Patent Date Issued
8657036 Tubing shoe Feb. 25, 2014
8561729 Casing bit and casing reamer designs Oct. 22, 2013
8528669 Earth removal member with features for facilitating drill-through Sep. 10, 2013
8297380 Casing and liner drilling shoes having integrated operational components, and related methods Oct. 30, 2012
8225888 Casing shoes having drillable and non-drillable cutting elements in different regions and related methods Jul. 24, 2012
8225887 Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methods Jul. 24, 2012
8205693 Casing and liner drilling shoes having selected profile geometries, and related methods Jun. 26, 2012
8167059 Casing and liner drilling shoes having spiral blade configurations, and related methods May. 1, 2012
8074749 Earth removal member with features for facilitating drill-through Dec. 13, 2011
8006785 Casing and liner drilling bits and reamers Aug. 30, 2011
7984763 Full bore lined wellbores Jul. 26, 2011
7896110 Shoe Mar. 1, 2011
7878271 Drill bit Feb. 1, 2011
7775302 Casing shoe and retrievable bit assembly Aug. 17, 2010
7757784 Drilling methods utilizing independently deployable multiple tubular strings Jul. 20, 2010
7658242 Hole coring system with lever arm Feb. 9, 2010
7484578 Hole coring system Feb. 3, 2009
7413020 Full bore lined wellbores Aug. 19, 2008
7395882 Casing and liner drilling bits Jul. 8, 2008
7216727 Drilling bit for drilling while running casing May. 15, 2007
7131506 Flightless rock auger for use with pressure drills with quick attachment and method of use Nov. 7, 2006
7100713 Expandable apparatus for drift and reaming borehole Sep. 5, 2006
7066253 Casing shoe Jun. 27, 2006
6983811 Reamer shoe Jan. 10, 2006
6945339 Core drill Sep. 20, 2005
6702045 Drilling apparatus Mar. 9, 2004
6675919 Tubular piling apparatus and method Jan. 13, 2004
6659173 Downhole tool Dec. 9, 2003
6619413 Flightless rock auger for use with pressure drills with quick attachment and method of use Sep. 16, 2003
6494276 Rock auger with pilot drill Dec. 17, 2002
6443247 Casing drilling shoe Sep. 3, 2002
6401820 Downhole tool Jun. 11, 2002
6223838 Auger system May. 1, 2001
6129163 Flightless rock auger with quick attachment and method of use Oct. 10, 2000
6062326 Casing shoe with cutting means May. 16, 2000
5127482 Expandable milling head for gas well drilling Jul. 7, 1992
5050679 Method of sealing contaminated wells Sep. 24, 1991
4979848 Drilling device Dec. 25, 1990
4932129 Casing punch for wells Jun. 12, 1990
4924951 Manhole cutter May. 15, 1990
4715455 Drill shoe Dec. 29, 1987
4657441 Penetration conductor pipe drive shoe Apr. 14, 1987
4534773 Abrasive product and method for manufacturing Aug. 13, 1985
4362217 Downhole shearers Dec. 7, 1982
4276942 Deviation device Jul. 7, 1981
4266621 Well casing window mill May. 12, 1981
4189015 Drill bits for obtaining core samples Feb. 19, 1980
3968847 Wellpoint jetting head Jul. 13, 1976

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