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Class Information
Number: 175/82
Name: Boring or penetrating the earth > Tool shaft advanced relative to guide insertable in inaccessible hole to change direction of advance > Guide carried by shaft to operative position
Description: Apparatus in which the means changing the direction of advance is supported by the tool shaft and moved into an operative position in the hole thereby.










Sub-classes under this class:

Class Number Class Name Patents
175/83 With clutch means acting between shaft and guide 8


Patents under this class:

Patent Number Title Of Patent Date Issued
7699107 Mechanical and fluid jet drilling method and apparatus Apr. 20, 2010
7467673 Rotary vector gear for use in rotary steerable tools Dec. 23, 2008
7320373 One-step directional coring or drilling system Jan. 22, 2008
7188690 Drilling device and method for producing undercut holes Mar. 13, 2007
7117958 One-step directional coring or drilling system Oct. 10, 2006
7066267 Downhole tubular splitter assembly and method Jun. 27, 2006
6968903 Orientable whipstock tool and method Nov. 29, 2005
6945328 Lockable motor assembly for use in a well bore Sep. 20, 2005
6786283 Methods and associated apparatus for drilling and completing a wellbore junction Sep. 7, 2004
6769499 Drilling direction control device Aug. 3, 2004
6648068 One-trip milling system Nov. 18, 2003
6588517 Boring apparatus Jul. 8, 2003
6554062 Anchor apparatus and method Apr. 29, 2003
6550553 Boring apparatus Apr. 22, 2003
6488090 Method and apparatus for accurate milling of windows in well casings Dec. 3, 2002
6412578 Boring apparatus Jul. 2, 2002
6378629 Boring apparatus Apr. 30, 2002
6318466 Method and apparatus for accurate milling of windows in well casings Nov. 20, 2001
6302198 One trip milling system Oct. 16, 2001
6247541 Method of drive pipe replacements on offshore platforms Jun. 19, 2001
6209645 Method and apparatus for accurate milling of windows in well casings Apr. 3, 2001
6186233 Down hole assembly and method for forming a down hole window and at least one keyway in communication with the down hole window for use in multilateral wells Feb. 13, 2001
6050334 Single trip whipstock assembly Apr. 18, 2000
6032740 Hook mill systems Mar. 7, 2000
5915474 Multiple drain drilling and production apparatus Jun. 29, 1999
5826651 Wellbore single trip milling Oct. 27, 1998
5816324 Whipstock accelerator ramp Oct. 6, 1998
5785133 Multiple lateral hydrocarbon recovery system and method Jul. 28, 1998
5535822 Apparatus for retrieving whipstock Jul. 16, 1996
5431220 Whipstock starter mill assembly Jul. 11, 1995
5427179 Retrievable whipstock Jun. 27, 1995
5398754 Retrievable whipstock anchor assembly Mar. 21, 1995
5335737 Retrievable whipstock Aug. 9, 1994
5193620 Whipstock setting method and apparatus Mar. 16, 1993
5154231 Whipstock assembly with hydraulically set anchor Oct. 13, 1992
5115872 Directional drilling system and method for drilling precise offset wellbores from a main wellbore May. 26, 1992
5052502 Apparatus for directional coring Oct. 1, 1991
4852666 Apparatus for and a method of drilling offset wells for producing hydrocarbons Aug. 1, 1989
4733732 Submudline drivepipe whipstock method and apparatus Mar. 29, 1988
4420049 Directional drilling method and apparatus Dec. 13, 1983
3958649 Methods and mechanisms for drilling transversely in a well May. 25, 1976











 
 
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