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| Number | Title | Issue Date |
| 7234547 | Apparatus and methods for sponge coring A sponge core barrel for use in performing sponge coring and methods of assembling the sponge core barrel, as well as methods of performing sponge coring. The sponge core barrel includes an outer barrel assembly, a core bit secured to a lower end thereof, and an inn... | 06/26/2007 |
| 7231991 | Apparatus and methods for sponge coring A sponge core barrel is disclosed for use in performing sponge coring and methods of assembling the sponge core barrel, as well as methods of performing sponge coring. The sponge core barrel includes an outer barrel assembly, a core bit secured to a lower end thereo... | 06/19/2007 |
| 7121356 | Tools and methods for retrieving buried coins and other treasure A “sod saver” tool for digging to acquire an object buried in the ground, and a non-metallic scraping tool utilized when carefully examining the soil. The sod saver tool includes a main cylindrical body rotated about its longitudinal axis for digging a substanti... | 10/17/2006 |
| 6942035 | Method and apparatus for retrieving equipment from a well A method for the retrieval of an object from a well (16) with a tool (30) is described, in which the object, by lowering of the tool (30), is directed into a lower inlet section (40) to a hollow holding area (46) in the tool (30... | 09/13/2005 |
| 4552229 | Externally powered core catcher A mechanism for catching and holding a core within an inner tube in a drill string includes a slidable core catcher and a full closure core catcher. The slidable core catcher is disposed within the inner tube and is coupled to an inner tube ring concentri... | 11/12/1985 |
| 4258803 | Core barrel for obtaining and retrieving subterranean formation samples Core barrel apparatus for obtaining and retrieving sealed core samples of subterranean formations are disclosed. The core barrel comprises a sample chamber for receiving a core sample as it is formed at the bottom of a bore hole and an expansion chamber f... | 03/31/1981 |
| 3952817 | Basket type core retainer Basket type core retainer apparatus that includes a core receiving tube having an axially inner end, an annular drill bit or tubular extension connected to the inner end of the core receiving tube and a core retainer cooperatively mounted by the tube and ... | 04/27/1976 |
