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Class Information
Number: 175/80
Name: Boring or penetrating the earth > Tool shaft advanced relative to guide insertable in inaccessible hole to change direction of advance > Tool telescopes over guide having surface set at angle in hole
Description: Apparatus in which the means changing the direction of advance comprises a rod or mandrel having a shaft engaging surface which is set in the hole at an angle to the original direction of advance, the shaft receiving the rod or mandrel in a telescoping relationship to be guided in a different direction thereby.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7610971 |
One trip milling system and method |
Nov. 3, 2009 |
| 6991048 |
Wellbore plug system and method |
Jan. 31, 2006 |
| 6968903 |
Orientable whipstock tool and method |
Nov. 29, 2005 |
| 6964303 |
Horizontal directional drilling in wells |
Nov. 15, 2005 |
| 6915853 |
Method and device for perforating a portion of casing in a reservoir |
Jul. 12, 2005 |
| 6899173 |
Small tubular window system |
May. 31, 2005 |
| 6889781 |
Horizontal directional drilling in wells |
May. 10, 2005 |
| 6848508 |
Slant entry well system and method |
Feb. 1, 2005 |
| 6786283 |
Methods and associated apparatus for drilling and completing a wellbore junction |
Sep. 7, 2004 |
| 6755248 |
One trip through tubing window milling apparatus and method |
Jun. 29, 2004 |
| 6715567 |
Apparatus and method for forming a pilot hole in a formation |
Apr. 6, 2004 |
| 6712144 |
Method for drilling multilateral wells with reduced under-reaming and related device |
Mar. 30, 2004 |
| 6470978 |
Fluid drilling system with drill string and retro jets |
Oct. 29, 2002 |
| 6419012 |
Deviated borehole drilling assembly |
Jul. 16, 2002 |
| 6419010 |
Deviated borehole drilling assembly |
Jul. 16, 2002 |
| 6386287 |
Deviated borehole drilling assembly |
May. 14, 2002 |
| 6334485 |
Deviated borehole drilling assembly |
Jan. 1, 2002 |
| 6302198 |
One trip milling system |
Oct. 16, 2001 |
| 6283208 |
Orienting tool and method |
Sep. 4, 2001 |
| 6279659 |
Assembly and method for providing a means of support and positioning for drilling multi-lateral wells and for reentry therein through a premilled window |
Aug. 28, 2001 |
| 6247541 |
Method of drive pipe replacements on offshore platforms |
Jun. 19, 2001 |
| 6209635 |
Positioning and conveying well apparatus and method |
Apr. 3, 2001 |
| 6209645 |
Method and apparatus for accurate milling of windows in well casings |
Apr. 3, 2001 |
| 6202761 |
Directional drilling method and apparatus |
Mar. 20, 2001 |
| 6192748 |
Dynamic orienting reference system for directional drilling |
Feb. 27, 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 |
| 6102123 |
One trip milling system |
Aug. 15, 2000 |
| 6050334 |
Single trip whipstock assembly |
Apr. 18, 2000 |
| 6012516 |
Deviated borehole drilling assembly |
Jan. 11, 2000 |
| 5964287 |
Window assembly for multiple wellbore completions |
Oct. 12, 1999 |
| 5884698 |
Whipstock assembly |
Mar. 23, 1999 |
| 5826651 |
Wellbore single trip milling |
Oct. 27, 1998 |
| 5727629 |
Wellbore milling guide and method |
Mar. 17, 1998 |
| 5657820 |
Two trip window cutting system |
Aug. 19, 1997 |
| 5584350 |
Wellbore sidetracking methods |
Dec. 17, 1996 |
| 5544704 |
Drillable whipstock |
Aug. 13, 1996 |
| 5535822 |
Apparatus for retrieving whipstock |
Jul. 16, 1996 |
| 5437340 |
Millout whipstock apparatus and method |
Aug. 1, 1995 |
| 5435400 |
Lateral well drilling |
Jul. 25, 1995 |
| 5383522 |
Whipstock and method |
Jan. 24, 1995 |
| 5379845 |
Method for setting a whipstock in a wellbore |
Jan. 10, 1995 |
| 5335737 |
Retrievable whipstock |
Aug. 9, 1994 |
| 5297638 |
Drivepipe guide and installation method for wells |
Mar. 29, 1994 |
| 5052502 |
Apparatus for directional coring |
Oct. 1, 1991 |
| 5012877 |
Apparatus for deflecting a drill string |
May. 7, 1991 |
| 4852666 |
Apparatus for and a method of drilling offset wells for producing hydrocarbons |
Aug. 1, 1989 |
| 4768599 |
Drill bit for undercutting a blind bore |
Sep. 6, 1988 |
| 4733732 |
Submudline drivepipe whipstock method and apparatus |
Mar. 29, 1988 |
| 4527639 |
Hydraulic piston-effect method and apparatus for forming a bore hole |
Jul. 9, 1985 |
| 4432422 |
Borehole guide and method of boring interpenetrating holes |
Feb. 21, 1984 |
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