|
| US4189243 | 25 Jan 1978 | 19 Feb 1980 | | In-line mud shearing apparatus |
| US4436166 | 17 Jul 1980 | 13 Mar 1984 | Gill Industries, Inc. | Downhole vortex generator and method |
| US4479558 | 5 Aug 1981 | 30 Oct 1984 | Gill Industries, Inc. | Drilling sub |
| US4512420 | 24 Jan 1984 | 23 Apr 1985 | Gill Industries, Inc. | Downhole vortex generator |
| US5176208 | 20 Mar 1991 | 5 Jan 1993 | Ponder Fishing Tools, Inc. | Reverse circulation tool handling cuttings and debris |
| US5240083 | 21 Apr 1992 | 31 Aug 1993 | Ingersoll-Rand Company | Device for removing drillhole debris |
| US6189617 | 20 Nov 1998 | 20 Feb 2001 | Baker Hughes Incorporated | High volume sand trap and method |
| US6276452 | 5 Nov 1999 | 21 Aug 2001 | Baker Hughes Incorporated | Apparatus for removal of milling debris |
| US6951251 | 6 Oct 2004 | 4 Oct 2005 | Bilco Tools, Inc. | Junk basket and method |
| US7188675 | 14 Jan 2005 | 13 Mar 2007 | M-I L.L.C. | Finger boot basket |
| US7373989 | 8 Jun 2005 | 20 May 2008 | Weatherford/Lamb, Inc. | Flow nozzle assembly |
| US7472745 | 25 May 2006 | 6 Jan 2009 | Baker Hughes Incorporated | Well cleanup tool with real time condition feedback to the surface |
| US7478687 | 13 Jul 2005 | 20 Jan 2009 | Baker Hughes Incorporated | Coiled tubing conveyed milling |
| US7703533 | 22 May 2007 | 27 Apr 2010 | Baker Hughes Incorporated | Shear type circulation valve and swivel with open port reciprocating feature |
| US7753113 | 24 Mar 2008 | 13 Jul 2010 | | Modular junk basket device with baffle deflector |
| US7789154 | 3 Aug 2007 | 7 Sep 2010 | Baker Hughes Incorporated | Eductor jet bushing for downhole use |
| US7934559 | 12 Feb 2007 | 3 May 2011 | Baker Hughes Incorporated | Single cycle dart operated circulation sub |
| US7992636 | 12 May 2006 | 9 Aug 2011 | Specialised Petroleum Services Group Limited | Device and method for retrieving debris from a well |
