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Class Information
Number: 175/74
Name: Boring or penetrating the earth > Means traveling with tool to constrain tool to bore along curved path > Sectional guide or shaft having means to lock sections in angular relation while boring
Description: Apparatus wherein the means for causing the tool to drill a curved bore comprises a tool shaft or a means adapted to direct the course of the tool which is made up of units or segments, generally pivotally connected to one another, movable to be positioned at an angle to one another in the direction of the bore axis and means engageable with the segments to hold them in their angularly related position.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8701795 Adjustable rotary steerable system Apr. 22, 2014
8689906 Methods and apparatus for reducing stick-slip Apr. 8, 2014
8590638 Intelligent wellbore propagation system Nov. 26, 2013
8556002 Steering component, steering assembly and method of steering a drill bit in a borehole Oct. 15, 2013
8517121 Steerable drilling system Aug. 27, 2013
8360174 Lead the bit rotary steerable tool Jan. 29, 2013
8360172 Steering device for downhole tools Jan. 29, 2013
8322461 Drilling apparatus and method Dec. 4, 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
8235146 Actuators, actuatable joints, and methods of directional drilling Aug. 7, 2012
8157025 Adjustable angle drive connection for a downhole drilling motor Apr. 17, 2012
7882904 Adjustable bent housing apparatus and method Feb. 8, 2011
7810582 Counterbalance enabled power generator for horizontal directional drilling systems Oct. 12, 2010
RE41759 Lockable swivel apparatus and method Sep. 28, 2010
7721826 Downhole jack assembly sensor May. 25, 2010
7717472 Method of locking tubular components in end to end relation May. 18, 2010
7669671 Segmented sleeve on a downhole tool string component Mar. 2, 2010
7661488 Regulator of angle and reactive moment of a gerotor type motor having a spindle and drilling bit in a bent drilling string Feb. 16, 2010
7641000 System for directional boring including a drilling head with overrunning clutch and method of boring Jan. 5, 2010
7588100 Method and apparatus for directional drilling with variable drill string rotation Sep. 15, 2009
7543658 Directional drilling control Jun. 9, 2009
7484573 Slip grip drilling tool Feb. 3, 2009
7481282 Flow operated orienter Jan. 27, 2009
7472763 Wear resistant tubular connection Jan. 6, 2009
7445059 Drill string deflecting apparatus Nov. 4, 2008
7360609 Directional drilling apparatus Apr. 22, 2008
7311157 Tool for controlling rotation of a bottom hole assembly with respect to a drillstring Dec. 25, 2007
7287607 Directional drilling apparatus Oct. 30, 2007
7237624 Electronic roll indexing compensation in a drilling system and method Jul. 3, 2007
7234544 Drill tool shaft-to-housing locking device Jun. 26, 2007
7219727 Wear resistant tubular connection May. 22, 2007
7216726 Downhole fluid-tight flexible joint May. 15, 2007
7195083 Three dimensional steering system and method for steering bit to drill borehole Mar. 27, 2007
7104345 Downhole rotatable-shaft connector assembly and method Sep. 12, 2006
6962214 Rotary seal for directional drilling tools Nov. 8, 2005
6942044 Three-dimensional steering tool for controlled downhole extended-reach directional drilling Sep. 13, 2005
6848518 Steerable underreaming bottom hole assembly and method Feb. 1, 2005
6843332 Three dimensional steerable system and method for steering bit to drill borehole Jan. 18, 2005
6837315 Rotary steerable drilling tool Jan. 4, 2005
6827159 Steerable horizontal subterranean drill bit having an offset drilling fluid seal Dec. 7, 2004
6814168 Steerable horizontal subterranean drill bit having elevated wear protector receptacles Nov. 9, 2004
6810972 Steerable horizontal subterranean drill bit having a one bolt attachment system Nov. 2, 2004
6810971 Steerable horizontal subterranean drill bit Nov. 2, 2004
6810973 Steerable horizontal subterranean drill bit having offset cutting tooth paths Nov. 2, 2004
6799646 Adjustable deflecting sub Oct. 5, 2004
6761231 Rotary driven drilling hammer Jul. 13, 2004
6708783 Three-dimensional steering tool for controlled downhole extended-reach directional drilling Mar. 23, 2004
6705415 Directional drilling apparatus Mar. 16, 2004
6659201 Method and apparatus for directional actuation Dec. 9, 2003

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