|
| US3930654 | 5 Dec 1973 | 6 Jan 1976 | Victor Richards | Sound track unit for audio-visual apparatus |
| US3963076 | 7 Mar 1975 | 15 Jun 1976 | Baker Oil Tools, Inc. | Method and apparatus for gravel packing well bores |
| US4037660 | 28 May 1974 | 26 Jul 1977 | K. R. Evans & Associates | Method for steam cleaning liners in oil well bores |
| US4248300 | 17 Apr 1978 | 3 Feb 1981 | Texas Iron Works, Inc. | Method of and apparatus for positioning retrievable landing nipple in a well bore string |
| US4428428 | 22 Dec 1981 | 31 Jan 1984 | Dresser Industries, Inc. | Tool and method for gravel packing a well |
| US4848459 | 12 Apr 1988 | 18 Jul 1989 | Dresser Industries, Inc. | Apparatus for installing a liner within a well bore |
| US5505260 | 1 Jun 1995 | 9 Apr 1996 | Conoco Inc. | Method and apparatus for wellbore sand control |
| US5507345 | 23 Nov 1994 | 16 Apr 1996 | Chevron U.S.A. Inc. | Methods for sub-surface fluid shut-off |
| US7128160 | 21 May 2003 | 31 Oct 2006 | Schlumberger Technology Corporation | Method and apparatus to selectively reduce wellbore pressure during pumping operations |