|
| US3958648 | 13. Febr. 1975 | 25. Mai 1976 | BPA Byggproduktion AB | Drilling equipment |
| US3965996 | 20. März 1975 | 29. Juni 1976 | | Means and method of drilling wells |
| US4083405 | 27. Jan. 1977 | 11. Apr. 1978 | A-Z International Tool Company | Well drilling method and apparatus therefor |
| US4103748 | 10. Dez. 1976 | 1. Aug. 1978 | | Method for inhibiting the wear in a well casing |
| US4227583 | 13. Nov. 1978 | 14. Okt. 1980 | Wirth Maschinen-und Bohrgerate-Fabrik | Method and apparatus for sinking shafts |
| US4421175 | 28. Aug. 1981 | 20. Dez. 1983 | Varco International, Inc. | Method of drilling and casing a well |
| US4437515 | 21. Dez. 1981 | 20. März 1984 | Varco International, Inc. | Positioning of well pipe jack in a rig |
| US4465131 | 8. Nov. 1982 | 14. Aug. 1984 | Varco International, Inc. | Well casing jack mechanism |
| US4595062 | 17. Juli 1980 | 17. Juni 1986 | Varco International, Inc. | Well casing jack mechanism |
| US6854533 | 20. Dez. 2002 | 15. Febr. 2005 | Weatherford/Lamb, Inc. | Apparatus and method for drilling with casing |
| US6857487 | 30. Dez. 2002 | 22. Febr. 2005 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
| US6896075 | 11. Okt. 2002 | 24. Mai 2005 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling with casing |
| US6899186 | 13. Dez. 2002 | 31. Mai 2005 | Weatherford/Lamb, Inc. | Apparatus and method of drilling with casing |
| US6953096 | 31. Dez. 2002 | 11. Okt. 2005 | Weatherford/Lamb, Inc. | Expandable bit with secondary release device |
| US6994176 | 5. März 2004 | 7. Febr. 2006 | Weatherford/Lamb, Inc. | Adjustable rotating guides for spider or elevator |
| US7004264 | 14. März 2003 | 28. Febr. 2006 | Weatherford/Lamb, Inc. | Bore lining and drilling |
| US7013997 | 15. Dez. 2003 | 21. März 2006 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7036610 | 6. Juli 2002 | 2. Mai 2006 | Weatherford / Lamb, Inc. | Apparatus and method for completing oil and gas wells |
| US7040420 | 19. Nov. 2003 | 9. Mai 2006 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7048050 | 2. Okt. 2003 | 23. Mai 2006 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7073598 | 23. Juli 2003 | 11. Juli 2006 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
| US7083005 | 31. Mai 2005 | 1. Aug. 2006 | Weatherford/Lamb, Inc. | Apparatus and method of drilling with casing |
| US7090021 | 16. März 2004 | 15. Aug. 2006 | | Apparatus for connecting tublars using a top drive |
| US7090023 | 9. Mai 2005 | 15. Aug. 2006 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling with casing |
| US7093675 | 1. Aug. 2001 | 22. Aug. 2006 | Weatherford/Lamb, Inc. | Drilling method |
| US7096982 | 27. Febr. 2004 | 29. Aug. 2006 | Weatherford/Lamb, Inc. | Drill shoe |
| US7100710 | 18. Dez. 2003 | 5. Sept. 2006 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7100713 | 2. Apr. 2001 | 5. Sept. 2006 | Weatherford/Lamb, Inc. | Expandable apparatus for drift and reaming borehole |
| US7108084 | 24. Dez. 2003 | 19. Sept. 2006 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7117957 | 25. Mai 2004 | 10. Okt. 2006 | Weatherford/Lamb, Inc. | Methods for drilling and lining a wellbore |
| US7128154 | 29. Jan. 2004 | 31. Okt. 2006 | Weatherford/Lamb, Inc. | Single-direction cementing plug |
| US7128161 | 20. Sept. 2005 | 31. Okt. 2006 | Weatherford/Lamb, Inc. | Apparatus and methods for facilitating the connection of tubulars using a top drive |
| US7131505 | 22. Febr. 2005 | 7. Nov. 2006 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
| US7137454 | 13. Mai 2005 | 21. Nov. 2006 | Weatherford/Lamb, Inc. | Apparatus for facilitating the connection of tubulars using a top drive |
| US7140445 | 5. März 2004 | 28. Nov. 2006 | Weatherford/Lamb, Inc. | Method and apparatus for drilling with casing |
| US7147068 | 5. Dez. 2003 | 12. Dez. 2006 | Weatherford / Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7165634 | 2. Okt. 2003 | 23. Jan. 2007 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7182158 | 26. Febr. 2002 | 27. Febr. 2007 | Tracto-Technik GmbH | Drilling device comprising a rotational drive |
| US7188687 | 27. Juli 2004 | 13. März 2007 | Weatherford/Lamb, Inc. | Downhole filter |
| US7191840 | 5. März 2004 | 20. März 2007 | Weatherford/Lamb, Inc. | Casing running and drilling system |
| US7213656 | 26. Apr. 2004 | 8. Mai 2007 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
| US7216727 | 21. Dez. 2000 | 15. Mai 2007 | Weatherford/Lamb, Inc. | Drilling bit for drilling while running casing |
| US7219744 | 29. Nov. 2005 | 22. Mai 2007 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
| US7228901 | 1. Dez. 2005 | 12. Juni 2007 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| US7264067 | 1. Okt. 2004 | 4. Sept. 2007 | Weatherford/Lamb, Inc. | Method of drilling and completing multiple wellbores inside a single caisson |
| US7281587 | 30. März 2006 | 16. Okt. 2007 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
| US7284617 | 20. Mai 2004 | 23. Okt. 2007 | Weatherford/Lamb, Inc. | Casing running head |
| US7303022 | 27. Apr. 2004 | 4. Dez. 2007 | Weatherford/Lamb, Inc. | Wired casing |
| US7311148 | 9. Febr. 2004 | 25. Dez. 2007 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
| US7325610 | 5. März 2004 | 5. Febr. 2008 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
| US7334650 | 2. Febr. 2004 | 26. Febr. 2008 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling a wellbore using casing |
| US7353880 | 15. Nov. 2006 | 8. Apr. 2008 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
| US7360594 | 5. März 2004 | 22. Apr. 2008 | Weatherford/Lamb, Inc. | Drilling with casing latch |
| US7370707 | 5. Apr. 2004 | 13. Mai 2008 | Weatherford/Lamb, Inc. | Method and apparatus for handling wellbore tubulars |
| US7413020 | 5. März 2004 | 19. Aug. 2008 | Weatherford/Lamb, Inc. | Full bore lined wellbores |
| US7448456 | 1. Febr. 2006 | 11. Nov. 2008 | Weatherford/Lamb, Inc. | Adjustable rotating guides for spider or elevator |
| US7451826 | 15. Aug. 2006 | 18. Nov. 2008 | Weatherford/Lamb, Inc. | Apparatus for connecting tubulars using a top drive |
| US7503397 | 29. Juli 2005 | 17. März 2009 | Weatherford/Lamb, Inc. | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| US7509722 | 5. März 2003 | 31. März 2009 | Weatherford/Lamb, Inc. | Positioning and spinning device |
| US7513300 | 20. März 2007 | 7. Apr. 2009 | Weatherford/Lamb, Inc. | Casing running and drilling system |
| US7617866 | 8. Sept. 2005 | 17. Nov. 2009 | Weatherford/Lamb, Inc. | Methods and apparatus for connecting tubulars using a top drive |
| US7650944 | 11. Juli 2003 | 26. Jan. 2010 | Weatherford/Lamb, Inc. | Vessel for well intervention |
| US7654325 | 31. Okt. 2007 | 2. Febr. 2010 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
| US7665531 | 15. Nov. 2006 | 23. Febr. 2010 | Weatherford/Lamb, Inc. | Apparatus for facilitating the connection of tubulars using a top drive |
| US7669662 | 20. Juli 2005 | 2. März 2010 | Weatherford/Lamb, Inc. | Casing feeder |
| US7694744 | 12. Jan. 2006 | 13. Apr. 2010 | Weatherford/Lamb, Inc. | One-position fill-up and circulating tool and method |
| US7712523 | 14. März 2003 | 11. Mai 2010 | Weatherford/Lamb, Inc. | Top drive casing system |
| US7757759 | 27. Apr. 2007 | 20. Juli 2010 | Weatherford/Lamb, Inc. | Torque sub for use with top drive |
| US7793719 | 31. Okt. 2007 | 14. Sept. 2010 | Weatherford/Lamb, Inc. | Top drive casing system |
| US7845418 | 18. Jan. 2006 | 7. Dez. 2010 | Weatherford/Lamb, Inc. | Top drive torque booster |
| US7874352 | 12. Dez. 2006 | 25. Jan. 2011 | Weatherford/Lamb, Inc. | Apparatus for gripping a tubular on a drilling rig |
| US7882902 | 15. Nov. 2007 | 8. Febr. 2011 | Weatherford/Lamb, Inc. | Top drive interlock |
| US7896084 | 15. Okt. 2007 | 1. März 2011 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
| US7918273 | 23. Jan. 2003 | 5. Apr. 2011 | Weatherford/Lamb, Inc. | Top drive casing system |
| US7975771 | 6. Dez. 2007 | 12. Juli 2011 | Vetco Gray Inc. | Method for running casing while drilling system |
| USRE42877 | 9. Juli 2010 | 1. Nov. 2011 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
