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Class Information
Number: 175/79
Name: Boring or penetrating the earth > Tool shaft advanced relative to guide insertable in inaccessible hole to change direction of advance
Description: Apparatus comprising a tool shaft and a means engageably by the shaft as the shaft is advanced to change the direction of advance of the shaft, said means being insertable in an inaccessible hole.

Sub-classes under this class:

Class Number Class Name Patents
175/82 Guide carried by shaft to operative position 41
175/80 Tool telescopes over guide having surface set at angle in hole 58
175/81 With anchor for guide engaging hole side wall 96

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8312939 Method and system for laterally drilling through a subterranean formation Nov. 20, 2012
8276688 Downhole casing cutting tool Oct. 2, 2012
8220554 Degradable whipstock apparatus and method of use Jul. 17, 2012
8167060 Apparatus and method for conveyance and control of a high pressure hose in jet drilling operations May. 1, 2012
8011453 Drilling system and methods of drilling lateral boreholes Sep. 6, 2011
7954561 Vertical direction adjustment tool for downhole drilling apparatus Jun. 7, 2011
7823665 Milling of cemented tubulars Nov. 2, 2010
7686101 Method and apparatus for laterally drilling through a subterranean formation Mar. 30, 2010
7575049 Exit window milling assembly with improved restraining force Aug. 18, 2009
7487847 Lateral downhole drilling tool Feb. 10, 2009
7455127 Apparatus and method for improving multilateral well formation and reentry Nov. 25, 2008
7380599 Apparatus and method for characterizing a reservoir Jun. 3, 2008
RE40067 Downhole equipment tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes Feb. 19, 2008
7216726 Downhole fluid-tight flexible joint May. 15, 2007
RE39141 Downhole equipment, tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes Jun. 27, 2006
6883611 Sealed multilateral junction system Apr. 26, 2005
6758289 Method and apparatus for hydrocarbon subterranean recovery Jul. 6, 2004
6615915 High pressure side-by-side wellhead system Sep. 9, 2003
6588517 Boring apparatus Jul. 8, 2003
6405804 Method and apparatus for retrieving a deflecting tool Jun. 18, 2002
6220372 Apparatus for drilling lateral drainholes from a wellbore Apr. 24, 2001
6206111 High pressure internal sleeve for use with easily drillable exit ports Mar. 27, 2001
6189629 Lateral jet drilling system Feb. 20, 2001
6041855 High torque pressure sleeve for easily drillable casing exit ports Mar. 28, 2000
6003621 Methods and apparatus for drilling holes laterally from a well Dec. 21, 1999
5964287 Window assembly for multiple wellbore completions Oct. 12, 1999
5911283 Sectional drive system Jun. 15, 1999
5887668 Wellbore milling-- drilling Mar. 30, 1999
5704437 Methods and apparatus for drilling holes laterally from a well Jan. 6, 1998
5699866 Sectional drive system Dec. 23, 1997
5678634 Method and apparatus for retrieving a whipstock Oct. 21, 1997
5560435 Method and apparatus for drilling multiple offshore wells from within a single conductor string Oct. 1, 1996
5484021 Method and apparatus for forming a window in a subsurface well conduit Jan. 16, 1996
5484017 Whipstock assembly for a sleeved casing Jan. 16, 1996
5458209 Device, system and method for drilling and completing a lateral well Oct. 17, 1995
5445222 Whipstock and staged sidetrack mill Aug. 29, 1995
5431223 Drilling kick-off device Jul. 11, 1995
5423388 Direction controllable subsurface borehole tool Jun. 13, 1995
5411082 Scoophead running tool May. 2, 1995
5197783 Extendable/erectable arm assembly and method of borehole mining Mar. 30, 1993
5148877 Apparatus for lateral drain hole drilling in oil and gas wells Sep. 22, 1992
5085283 Method and tool string for curving a vertical borehole horizontally Feb. 4, 1992
4928757 Hydraulic well penetration apparatus May. 29, 1990
4800966 Devices for drilling branched wells Jan. 31, 1989
4790384 Hydraulic well penetration apparatus and method Dec. 13, 1988
4768599 Drill bit for undercutting a blind bore Sep. 6, 1988
4640362 Well penetration apparatus and method Feb. 3, 1987
4577703 Apparatus for making boreholes in the lateral walls of narrow underground mine workings Mar. 25, 1986
4554982 Apparatus for forming boreholes Nov. 26, 1985
4449595 Method and apparatus for drilling a curved bore May. 22, 1984

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