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Class Information
Number: 175/76
Name: Boring or penetrating the earth > Means traveling with tool to constrain tool to bore along curved path > Axially spaced opposed bore wall engaging guides
Description: Apparatus wherein the means for causing the tool to drill a curved bore comprises means carried by the tool or tool shaft at points axially spaced along the bore axis and extending in opposite directions laterally from the tool or tool shaft to engage the bore wall.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8640792 Flexible directional drilling apparatus and related methods Feb. 4, 2014
8567524 Downhole apparatus with a wireless data communication device between rotating and non-rotating members Oct. 29, 2013
8474552 Piston devices and methods of use Jul. 2, 2013
8448721 Directional drilling system May. 28, 2013
8434567 Borehole drilling apparatus, systems, and methods May. 7, 2013
8393417 Apparatus and methods to optimize fluid flow and performance of downhole drilling equipment Mar. 12, 2013
8360172 Steering device for downhole tools Jan. 29, 2013
8342266 Timed steering nozzle on a downhole drill bit Jan. 1, 2013
8302705 Steering system Nov. 6, 2012
8302703 Method and apparatus for hydraulic steering of downhole rotary drilling systems Nov. 6, 2012
8286733 Rotary steerable tool Oct. 16, 2012
8240399 Drill bit with an adjustable steering device Aug. 14, 2012
8205686 Drill bit with adjustable axial pad for controlling torsional fluctuations Jun. 26, 2012
8176999 Steerable drill bit arrangement May. 15, 2012
8157024 Ball piston steering devices and methods of use Apr. 17, 2012
8141657 Steerable rotary directional drilling tool for drilling boreholes Mar. 27, 2012
8087479 Drill bit with an adjustable steering device Jan. 3, 2012
8082988 Apparatus and method for stabilization of downhole tools Dec. 27, 2011
8011429 Transport assembly Sep. 6, 2011
8011452 Steerable drilling system Sep. 6, 2011
8011448 Rotary steerable tool Sep. 6, 2011
7975778 Borehole drilling control system, method and apparatus Jul. 12, 2011
7971662 Drill bit with adjustable steering pads Jul. 5, 2011
7954561 Vertical direction adjustment tool for downhole drilling apparatus Jun. 7, 2011
7950473 Non-azimuthal and azimuthal formation evaluation measurement in a slowly rotating housing May. 31, 2011
7942214 Steerable drilling system May. 17, 2011
7942213 Using hydrostatic bearings for downhole applications May. 17, 2011
7882905 Stabilizer and reamer system having extensible blades and bearing pads and method of using same Feb. 8, 2011
7866384 Downhole device Jan. 11, 2011
7866415 Steering device for downhole tools Jan. 11, 2011
7861802 Flexible directional drilling apparatus and method Jan. 4, 2011
7849936 Steerable rotary directional drilling tool for drilling boreholes Dec. 14, 2010
7798253 Method and apparatus for controlling precession in a drilling assembly Sep. 21, 2010
7681665 Downhole hydraulic control system Mar. 23, 2010
7650952 Passive vertical drilling motor stabilization Jan. 26, 2010
7503408 Steering assembly and steering component Mar. 17, 2009
7493967 Tractor with improved valve system Feb. 24, 2009
7445060 Steerable drill bit arrangement Nov. 4, 2008
7413032 Self-controlled directional drilling systems and methods Aug. 19, 2008
7413034 Steering tool Aug. 19, 2008
7389830 Rotary steerable motor system for underground drilling Jun. 24, 2008
7383897 Downhole steering tool having a non-rotating bendable section Jun. 10, 2008
7306056 Directional cased hole side track method applying rotary closed loop system and casing mill Dec. 11, 2007
7306060 Drilling assembly with a steering device for coiled-tubing operations Dec. 11, 2007
7306058 Anti-rotation device for a steerable rotary drilling device Dec. 11, 2007
7287605 Steerable drilling apparatus having a differential displacement side-force exerting mechanism Oct. 30, 2007
7267184 Modular housing for a rotary steerable tool Sep. 11, 2007
7213643 Expanded liner system and method May. 8, 2007
7188685 Hybrid rotary steerable system Mar. 13, 2007
7188689 Variable gauge drilling apparatus and method of assembly therefor Mar. 13, 2007

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