3394767 | Well completion apparatus | 1968-07-30 | ||
3115932 | Apparatus for consolidating incompetent subterranean formations | 1963-12-31 | ||
3032108 | Well packer apparatus | 1962-05-01 | ||
2923204 | Propellant chamber means | 1960-02-02 | ||
2544573 | Method and means for drilling | 1951-03-06 | ||
2265982 | Directional drill bit | 1941-12-16 | ||
1560815 | Well torpedo | 1925-11-10 |