Did You Know...
...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7093674 | Drilling formation tester, apparatus and methods of testing and monitoring status of tester An integrated drilling and evaluation system includes a drill string having an interior portion and a drill bit, carried on a lower end, that includes ports for communicating fluid between the interior portion of the drill string and an uncased well bore. A packer, ... | 08/22/2006 |
| 6659204 | Method and apparatus for recovering core samples under pressure A pressure and temperature core sampler comprises a tool for recovering cores specifically enabling the evaluation of methane hydrate resources. Because methane hydrate tends to decompose under conditions of pressure decrease and/or temperature increase a... | 12/09/2003 |
| 6216804 | Apparatus for recovering core samples under pressure A pressure and temperature core sampler comprises a tool for recovering cores specifically enabling the evaluation of methane hydrate resources. Because methane hydrate tends to decompose under conditions of pressure decrease and/or temperature increase a... | 04/17/2001 |
| 5555945 | Early evaluation by fall-off testing Early evaluation testing of a subsurface formation is provided by monitoring pressure fall-off in the formation. This is accomplished by providing a column of fluid in the well having an overbalanced, hydrostatic pressure at the subsurface formation great... | 09/17/1996 |
| 5482123 | Method and apparatus for pressure coring with non-invading gel A pressure core barrel including an inner tube containing a non-invasive gel for encapsulating a core sample. An anti-whirl core bit is employed, and the core bit and inner tube pilot shoe are configured and arranged to prevent damage to the core from dri... | 01/09/1996 |
| 4950844 | Method and apparatus for obtaining a core sample at ambient pressure For use with a core sample tool removing a sample from a formation of interest, a sonde supported sample receiving chamber is disclosed. It includes a main valve for sample insertion into a cavity in a resilient sleeve. The sleeve is in a chamber connecte... | 08/21/1990 |
| 4583595 | Method and apparatus for obtaining fluid samples in a well A method and an apparatus for taking a sample representative of the fluid present in a well comprises an elongated body, suitable for being suspended down the well at the end of a cable. The body includes a removable sampling vessel fixed sideways in a re... | 04/22/1986 |
| 4356872 | Downhole core barrel flushing system A core barrel flushing device and method is disclosed particularly for flushing drilling fluid, mud and other undesirable material from a pressure core barrel downhole at existing conditions and pressure. The flushing device (F) comprises an outer barrel attac... | 11/02/1982 |
| 4317490 | Apparatus and method for obtaining a core at in situ pressure A method and apparatus are disclosed for obtaining a core at in situ pressure of sedimentary deposits at the bottom of a well bore or body of water. The core barrel has a pressure chamber that is closed and opened by a ball valve actuated from the surface... | 03/02/1982 |
| 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 |
| 4256192 | Pressure core barrel This invention relates to improvements in pressure core barrels of the type described in U.S. Pat. No. 3,548,958 wherein a controlled pressure is maintained on a core sample during surfacing. Among the improvements provided by the present invention are an... | 03/17/1981 |
| 4230192 | Core sampling apparatus and method Coring apparatus for obtaining core samples which may comprise: an outer barrel assembly, the lower end of which is adapted for connection to a core bit, the upper end of which is adapted for connection to a drill string; an inner barrel assembly concentr... | 10/28/1980 |
| 4142594 | Method and core barrel apparatus for obtaining and retrieving subterranean formation samples Core barrel apparatus and a method for obtaining and retrieving sealed core samples of subterranean formations are disclosed. The core barrel apparatus comprises inner and outer core barrels. The upper portion of the outer core barrel is adapted to be con... | 03/06/1979 |
