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Sponsored by: Flash of Genius |
| 1301285 | ||||
| 1880218 | Method of lining oil wells and means therefor | |||
| 1981525 | Method of and apparatus for drilling oil wells | |||
| 2134311 | Method and apparatus for suspending and sealing well casings | |||
| 2583316 | Method and apparatus for setting a casing structure in a well hole or the like | |||
| 2906500 | Completion of wells under water | |||
| 3028915 | Method and apparatus for lining wells |