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Class Information
Number: 175/75
Name: Boring or penetrating the earth > Means traveling with tool to constrain tool to bore along curved path > Normally curved guide or shaft
Description: Apparatus wherein the means to cause the tool to bore a curved hole comprises a member to direct the tool or a shaft for driving the tool which has or is formed to assume a nonlinear shape in the direction of boring.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8590638 Intelligent wellbore propagation system Nov. 26, 2013
8561722 Methods of controllably milling a window in a cased wellbore using a pressure differential to cause movement of a mill Oct. 22, 2013
8556002 Steering component, steering assembly and method of steering a drill bit in a borehole Oct. 15, 2013
8528644 Apparatus and method for milling casing in jet drilling applications for hydrocarbon production Sep. 10, 2013
8430187 Directional sidetrack well drilling system Apr. 30, 2013
8327944 Whipstock attachment to a fixed cutter drilling or milling bit Dec. 11, 2012
8302705 Steering system Nov. 6, 2012
8286732 Steering component, steering assembly and method of steering a drill bit in a borehole Oct. 16, 2012
8267198 Perforating and jet drilling method and apparatus Sep. 18, 2012
8267199 Perforating and jet drilling method and apparatus Sep. 18, 2012
8196680 Perforating and jet drilling method and apparatus Jun. 12, 2012
8186458 Expandable window milling bit and methods of milling a window in casing May. 29, 2012
8122977 Cutting device with multiple cutting structures Feb. 28, 2012
7963347 Systems and methods for reducing backward whirling while drilling Jun. 21, 2011
7909118 Apparatus and method for positioning extended lateral channel well stimulation equipment Mar. 22, 2011
7753139 Cutting device with multiple cutting structures Jul. 13, 2010
7709421 Microemulsions to convert OBM filter cakes to WBM filter cakes having filtration control May. 4, 2010
7632381 Systems for providing continuous containment of delayed coker unit operations Dec. 15, 2009
7487846 Electrically operated drilling method Feb. 10, 2009
7481282 Flow operated orienter Jan. 27, 2009
7413033 Directional drill head Aug. 19, 2008
7270198 Orienter for drilling tool assembly and method Sep. 18, 2007
7243739 Coiled tubing directional drilling apparatus Jul. 17, 2007
7225887 Method of drilling an ultra-short radius borehole Jun. 5, 2007
7207398 Steerable rotary drill bit assembly with pilot bit Apr. 24, 2007
7178611 System and method for directional drilling utilizing clutch assembly Feb. 20, 2007
6991047 Wellbore sealing system and method Jan. 31, 2006
6978850 Smart clutch Dec. 27, 2005
6920945 Method and system for facilitating horizontal drilling Jul. 26, 2005
6913094 Leading body for ground drilling and ground drilling machine Jul. 5, 2005
6763900 Directional well drilling Jul. 20, 2004
6641634 Hand-held tool with dust extraction Nov. 4, 2003
6640910 Long gauge roller vane drilling motor Nov. 4, 2003
6588517 Boring apparatus Jul. 8, 2003
6550553 Boring apparatus Apr. 22, 2003
6516902 Directional drilling system Feb. 11, 2003
6464022 Mobile horizontal directional boring apparatus and method for use in boring from existing utility manholes Oct. 15, 2002
6419020 Hydraulic drilling method and system for forming radial drain holes in underground oil and gas bearing formations Jul. 16, 2002
6412578 Boring apparatus Jul. 2, 2002
6378629 Boring apparatus Apr. 30, 2002
6308789 Drill bit for directional drilling Oct. 30, 2001
6125949 Method of and apparatus for horizontal well drilling Oct. 3, 2000
6116356 Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter Sep. 12, 2000
RE36556 Method and apparatus for drilling bore holes under pressure Feb. 8, 2000
5941323 Steerable directional drilling tool Aug. 24, 1999
5857531 Bottom hole assembly for directional drilling Jan. 12, 1999
5765653 Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter Jun. 16, 1998
5638910 Downhole sub for directional drilling Jun. 17, 1997
5601151 Drilling tool Feb. 11, 1997
5555946 Method and tool for use in commmencing the drilling of a deviated well Sep. 17, 1996

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