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Class Information
Number: 175/90
Name: Boring or penetrating the earth > Tool element or continuously driven flexible or articulated endless member > Flexible or articulated member carried on support swingable or laterally movable relative to bore axis
Description: Apparatus in which a flexible or articulated member is carried on a support which is adapted to move all or a portion of said member radially relative to the axis of the bore to undercut or slot the wall of the borehole.

Patents under this class:

Patent Number Title Of Patent Date Issued
8640792 Flexible directional drilling apparatus and related methods Feb. 4, 2014
8362915 System and method for determining stretch or compression of a drill string Jan. 29, 2013
7866407 Method for construction of low thermal expansion and low resistance wire for logging applications Jan. 11, 2011
7383890 Universal rig with vertical stand for tubulars Jun. 10, 2008
7363989 Device for a pulling tool for use in pipes and boreholes for the production of oil and gas Apr. 29, 2008
7156192 Open hole tractor with tracks Jan. 2, 2007
6880649 Apparatus and method for directional drilling of holes Apr. 19, 2005
6135215 Tool string apparatus for lateral borehole formation Oct. 24, 2000
6024166 Apparatus for forming a slot in a wellbore Feb. 15, 2000
5984025 Drill pipe tong retaining apparatus Nov. 16, 1999
5279373 Controllable drill head Jan. 18, 1994
4624326 Process and apparatus for cutting rock Nov. 25, 1986

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