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Class Information
Number: 175/53
Name: Boring or penetrating the earth > Enlargement of existing pilot throughbore requiring accessibility to existing opposite bore ends to insert and remove tool
Description: Process or apparatus including a step of, or apparatus peculiar to increasing the diameter of an existing through borehole (spaced entrance and exit points) wherein certain parts of either the boring apparatus used must be located outside of end of the existing borehole at some time during the boring operation.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8365841 Sectional back reamer apparatus and method for horizontal directional drilling Feb. 5, 2013
8281876 Reamers and methods for directional drilling Oct. 9, 2012
8225870 Method for making windows in oil well casings Jul. 24, 2012
8201647 Earth drilling reamer with replaceable blades Jun. 19, 2012
8146682 Apparatus and methods of milling a restricted casing shoe Apr. 3, 2012
8011449 Method and apparatus for directional drilling Sep. 6, 2011
7963723 Overdrilling apparatus Jun. 21, 2011
7958950 Reamer and methods for directional drilling Jun. 14, 2011
7891439 Method of multistage manufacturing a ground bore Feb. 22, 2011
7730969 Reamer and methods for directional drilling Jun. 8, 2010
7699123 Bore hole sleeve reaming apparatus and method Apr. 20, 2010
7694752 Dry drilling Apr. 13, 2010
7669670 Procedure for installing horizontal drains for uptake of sea water Mar. 2, 2010
7654340 Directional reaming system Feb. 2, 2010
7624817 Bore hole reaming apparatus and method Dec. 1, 2009
7617888 Pilot tube system and attachment mechanism for auger boring machine Nov. 17, 2009
7597158 Drilling and hole enlargement device Oct. 6, 2009
7490680 Process and system for drilling and lining a bore hole Feb. 17, 2009
7422076 Autoreaming systems and methods Sep. 9, 2008
7413031 Apparatus and method for maintaining control of a drilling machine Aug. 19, 2008
7389829 Method and apparatus for forming bored hole Jun. 24, 2008
7353889 Rotary driven pipe-bursting tool Apr. 8, 2008
7337859 Method and device for drilling a channel Mar. 4, 2008
7243737 Interchangeable reamer Jul. 17, 2007
7219750 Process and system for drilling and lining a bore hole May. 22, 2007
7195079 Directional reaming system Mar. 27, 2007
7168509 Percussive reamer and method of use thereof Jan. 30, 2007
7137460 Back reaming tool Nov. 21, 2006
7131790 Boring and conduit/pipe system Nov. 7, 2006
7128168 Reamer apparatus for ground boring machine Oct. 31, 2006
7111694 Fixed blade fixed cutter hole opener Sep. 26, 2006
7108082 Hole reaming apparatus and method Sep. 19, 2006
7090034 Reamer having toroidal crusher body and method of use Aug. 15, 2006
7063145 Methods and systems for heating a hydrocarbon containing formation in situ with an opening contacting the earth's surface at two locations Jun. 20, 2006
7056065 Device and method for changing lines Jun. 6, 2006
6953306 Method of accurate trenchless installation of underground pipe Oct. 11, 2005
6953305 Bundle of pipes and method for parallel arrangement of pipes according to a bore and swivel method Oct. 11, 2005
6929077 Boring head, roller cutter and saddle for a boring head for rotary drilling Aug. 16, 2005
6920944 Apparatus and method for drilling and reaming a borehole Jul. 26, 2005
6808030 Enlargement drilling system Oct. 26, 2004
6793442 Device and method for trenchless replacement of underground pipe Sep. 21, 2004
6755593 Pipe replacement method and rotary impact mechanism for pipe bursting Jun. 29, 2004
6732816 Method of forming a trenchless flowline May. 11, 2004
6729418 Back reaming tool May. 4, 2004
6702046 Drill device for a drilling apparatus Mar. 9, 2004
6682264 Method of accurate trenchless installation of underground pipe Jan. 27, 2004
6668946 Backreamer Dec. 30, 2003
6659198 Back reamer assembly Dec. 9, 2003
6655874 Method and apparatus for slitting flexible pipe in an underground bore Dec. 2, 2003
6585062 Steerable directional drilling reamer Jul. 1, 2003

1 2 3 4

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