|
| US4716965 | 8. Apr. 1986 | 5. Jan. 1988 | Shell Oil Company | Installing casing with improved casing/cement bonding |
| US5564413 | 29. Aug. 1994 | 15. Okt. 1996 | NKK Corporation | Oil well pipe for a casing |
| US7337841 | 24. März 2004 | 4. März 2008 | Halliburton Energy Services, Inc. | Casing comprising stress-absorbing materials and associated methods of use |
| US7946351 | 12. Dez. 2005 | 24. Mai 2011 | Halliburton Energy Services, Inc. | Method and device for sealing a void incompletely filled with a cast material |