| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Kca Deutag Drilling Land Support Ltd | SC253225 | 01/08/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| A.I.S.L. LIMITED | 00968158 | 14/05/1996 | 16/01/2003 | Dissolved |
| ABBOT GROUP LIMITED | 00623285 | 19/06/1995 | 11/08/2010 | Bronze |
| ABBOT HOLDINGS LIMITED | 02682916 | 07/11/1996 | 11/08/2010 | Bronze |
| ABBOT INVESTMENTS (NORTH AFRICA) LIMITED | 05246036 | 26/10/2004 | 11/08/2010 | One Red Flag |
| ALBYN DRILLING SERVICES LIMITED | SC118702 | 15/10/2001 | 11/08/2010 | Dissolved |
| BROMPTON HOLDINGS LIMITED | SC062145 | 14/05/1996 | 16/01/2003 | Not Trading |
| DEUTAG LIMITED | 02161895 | 15/10/2001 | 11/08/2010 | Dissolved |
| DEUTAG RESOURCE MANAGEMENT LIMITED | SC110503 | 15/10/2001 | 11/08/2010 | Dissolved |
| DEUTAG UK LIMITED | 02279453 | 15/10/2001 | 11/08/2010 | Dissolved |
| EAE (RT) LIMITED | 01031464 | 14/05/1996 | 16/01/2003 | Insolvent |
| EVERARD PIPELINES (U.K.) LIMITED | SC091433 | 14/05/1996 | 16/01/2003 | Dissolved |
| KCA DEUTAG ALPHA II LIMITED | 06511474 | 16/04/2008 | 11/08/2010 | Dissolved |
| KCA DEUTAG ALPHA LIMITED | 06433748 | 16/04/2008 | 11/08/2010 | Silver |
| KCA DEUTAG CASPIAN LIMITED | 01877963 | 25/07/1996 | 11/08/2010 | Amber |
| KCA DEUTAG DRILLING GROUP LIMITED | 01059871 | 07/11/1996 | 11/08/2010 | One Red Flag |
| KCA DEUTAG DRILLING LIMITED | SC031961 | 10/05/2004 | 11/08/2010 | Silver |
| KCA DEUTAG DRILLING SERVICES (UK) LIMITED | SC234542 | 01/08/2005 | 11/08/2010 | Insolvent |
| KCA DEUTAG ENTERPRISES LIMITED | 06715023 | 03/10/2008 | 11/08/2010 | One Red Flag |
| KCA DEUTAG INVESTMENTS LIMITED | FC029380 | 13/01/2010 | 11/08/2010 | Bronze |
| KCA DEUTAG TECHNICAL SUPPORT LIMITED | SC219425 | 11/09/2001 | 11/08/2010 | Amber |
| KCA DRILLING UK LIMITED | SC125584 | 13/11/1996 | 11/08/2010 | Dissolved |
| KCA EUROPE LIMITED | 01189464 | 13/11/1996 | 11/08/2010 | Dissolved |
| KCA EUROPEAN HOLDINGS LIMITED | 04286946 | 13/09/2001 | 11/08/2010 | Silver |
| M.E.S. GROUP LIMITED | 01770514 | 14/05/1996 | 16/01/2003 | Dissolved |
| OILFIELD INSPECTION SERVICES OVERSEAS LIMITED | 01344053 | 14/05/1996 | 16/01/2003 | Not Trading |
| OIS INTERNATIONAL INSPECTION LIMITED | 02688399 | 08/02/1996 | 16/01/2003 | Not Trading |
| OIS LIMITED | 01676689 | 14/05/1996 | 16/01/2003 | Not Trading |
| OIS TEESSIDE LIMITED | 00568950 | 10/10/1997 | 16/01/2003 | Dissolved |
| PRODRILL ENGINEERING LIMITED | 01656768 | 15/10/2001 | 12/05/2004 | Insolvent |
| RDS ENERGY SOLUTIONS LIMITED | 02479484 | 15/01/2003 | 11/08/2010 | Amber |
| RIG DESIGN SERVICES HOLDINGS LIMITED | 04286931 | 13/09/2001 | 11/08/2010 | Amber |
| SANDPIPER DRILLING LIMITED | 01345950 | 25/07/1996 | 11/08/2010 | Dissolved |
| SET DRILLING COMPANY LIMITED | SC167498 | 15/10/2001 | 11/08/2010 | One Red Flag |
| TURBO BETA PLC | 06433751 | 16/04/2008 | 11/08/2010 | Dissolved |