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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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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