|
| US3958648 | 13 Feb 1975 | 25 May 1976 | BPA Byggproduktion AB | Drilling equipment |
| US3965996 | 20 Mar 1975 | 29 Jun 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 Dec 1976 | 1 Aug 1978 | | Method for inhibiting the wear in a well casing |
| US4227583 | 13 Nov 1978 | 14 Oct 1980 | Wirth Maschinen-und Bohrgerate-Fabrik | Method and apparatus for sinking shafts |
| US4421175 | 28 Aug 1981 | 20 Dec 1983 | Varco International, Inc. | Method of drilling and casing a well |
| US4437515 | 21 Dec 1981 | 20 Mar 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 Jul 1980 | 17 Jun 1986 | Varco International, Inc. | Well casing jack mechanism |
| US6854533 | 20 Dec 2002 | 15 Feb 2005 | Weatherford/Lamb, Inc. | Apparatus and method for drilling with casing |
| US6857487 | 30 Dec 2002 | 22 Feb 2005 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
| US6896075 | 11 Oct 2002 | 24 May 2005 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling with casing |
| US6899186 | 13 Dec 2002 | 31 May 2005 | Weatherford/Lamb, Inc. | Apparatus and method of drilling with casing |
| US6953096 | 31 Dec 2002 | 11 Oct 2005 | Weatherford/Lamb, Inc. | Expandable bit with secondary release device |
| US6994176 | 5 Mar 2004 | 7 Feb 2006 | Weatherford/Lamb, Inc. | Adjustable rotating guides for spider or elevator |
| US7004264 | 14 Mar 2003 | 28 Feb 2006 | Weatherford/Lamb, Inc. | Bore lining and drilling |
| US7013997 | 15 Dec 2003 | 21 Mar 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 Jul 2002 | 2 May 2006 | Weatherford / Lamb, Inc. | Apparatus and method for completing oil and gas wells |
| US7040420 | 19 Nov 2003 | 9 May 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 Oct 2003 | 23 May 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 Jul 2003 | 11 Jul 2006 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
| US7083005 | 31 May 2005 | 1 Aug 2006 | Weatherford/Lamb, Inc. | Apparatus and method of drilling with casing |
| US7090021 | 16 Mar 2004 | 15 Aug 2006 | | Apparatus for connecting tublars using a top drive |
| US7090023 | 9 May 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 Feb 2004 | 29 Aug 2006 | Weatherford/Lamb, Inc. | Drill shoe |
| US7100710 | 18 Dec 2003 | 5 Sep 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 Sep 2006 | Weatherford/Lamb, Inc. | Expandable apparatus for drift and reaming borehole |
| US7108084 | 24 Dec 2003 | 19 Sep 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 May 2004 | 10 Oct 2006 | Weatherford/Lamb, Inc. | Methods for drilling and lining a wellbore |
| US7128154 | 29 Jan 2004 | 31 Oct 2006 | Weatherford/Lamb, Inc. | Single-direction cementing plug |
| US7128161 | 20 Sep 2005 | 31 Oct 2006 | Weatherford/Lamb, Inc. | Apparatus and methods for facilitating the connection of tubulars using a top drive |
| US7131505 | 22 Feb 2005 | 7 Nov 2006 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
| US7137454 | 13 May 2005 | 21 Nov 2006 | Weatherford/Lamb, Inc. | Apparatus for facilitating the connection of tubulars using a top drive |
| US7140445 | 5 Mar 2004 | 28 Nov 2006 | Weatherford/Lamb, Inc. | Method and apparatus for drilling with casing |
| US7147068 | 5 Dec 2003 | 12 Dec 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 Oct 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 Feb 2002 | 27 Feb 2007 | Tracto-Technik GmbH | Drilling device comprising a rotational drive |
| US7188687 | 27 Jul 2004 | 13 Mar 2007 | Weatherford/Lamb, Inc. | Downhole filter |
| US7191840 | 5 Mar 2004 | 20 Mar 2007 | Weatherford/Lamb, Inc. | Casing running and drilling system |
| US7213656 | 26 Apr 2004 | 8 May 2007 | Weatherford/Lamb, Inc. | Apparatus and method for facilitating the connection of tubulars using a top drive |
| US7216727 | 21 Dec 2000 | 15 May 2007 | Weatherford/Lamb, Inc. | Drilling bit for drilling while running casing |
| US7219744 | 29 Nov 2005 | 22 May 2007 | Weatherford/Lamb, Inc. | Method and apparatus for connecting tubulars using a top drive |
| US7228901 | 1 Dec 2005 | 12 Jun 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 Oct 2004 | 4 Sep 2007 | Weatherford/Lamb, Inc. | Method of drilling and completing multiple wellbores inside a single caisson |
| US7281587 | 30 Mar 2006 | 16 Oct 2007 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
| US7284617 | 20 May 2004 | 23 Oct 2007 | Weatherford/Lamb, Inc. | Casing running head |
| US7303022 | 27 Apr 2004 | 4 Dec 2007 | Weatherford/Lamb, Inc. | Wired casing |
| US7311148 | 9 Feb 2004 | 25 Dec 2007 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
| US7325610 | 5 Mar 2004 | 5 Feb 2008 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
| US7334650 | 2 Feb 2004 | 26 Feb 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 Mar 2004 | 22 Apr 2008 | Weatherford/Lamb, Inc. | Drilling with casing latch |
| US7370707 | 5 Apr 2004 | 13 May 2008 | Weatherford/Lamb, Inc. | Method and apparatus for handling wellbore tubulars |
| US7413020 | 5 Mar 2004 | 19 Aug 2008 | Weatherford/Lamb, Inc. | Full bore lined wellbores |
| US7448456 | 1 Feb 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 Jul 2005 | 17 Mar 2009 | Weatherford/Lamb, Inc. | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| US7509722 | 5 Mar 2003 | 31 Mar 2009 | Weatherford/Lamb, Inc. | Positioning and spinning device |
| US7513300 | 20 Mar 2007 | 7 Apr 2009 | Weatherford/Lamb, Inc. | Casing running and drilling system |
| US7617866 | 8 Sep 2005 | 17 Nov 2009 | Weatherford/Lamb, Inc. | Methods and apparatus for connecting tubulars using a top drive |
| US7650944 | 11 Jul 2003 | 26 Jan 2010 | Weatherford/Lamb, Inc. | Vessel for well intervention |
| US7654325 | 31 Oct 2007 | 2 Feb 2010 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
| US7665531 | 15 Nov 2006 | 23 Feb 2010 | Weatherford/Lamb, Inc. | Apparatus for facilitating the connection of tubulars using a top drive |
| US7669662 | 20 Jul 2005 | 2 Mar 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 Mar 2003 | 11 May 2010 | Weatherford/Lamb, Inc. | Top drive casing system |
| US7757759 | 27 Apr 2007 | 20 Jul 2010 | Weatherford/Lamb, Inc. | Torque sub for use with top drive |
| US7793719 | 31 Oct 2007 | 14 Sep 2010 | Weatherford/Lamb, Inc. | Top drive casing system |
| US7845418 | 18 Jan 2006 | 7 Dec 2010 | Weatherford/Lamb, Inc. | Top drive torque booster |
| US7874352 | 12 Dec 2006 | 25 Jan 2011 | Weatherford/Lamb, Inc. | Apparatus for gripping a tubular on a drilling rig |
| US7882902 | 15 Nov 2007 | 8 Feb 2011 | Weatherford/Lamb, Inc. | Top drive interlock |
| US7896084 | 15 Oct 2007 | 1 Mar 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 Dec 2007 | 12 Jul 2011 | Vetco Gray Inc. | Method for running casing while drilling system |
| USRE42877 | 9 Jul 2010 | 1 Nov 2011 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
