Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| D600151 | Retainer for electronic identification tag | 09/15/2009 |
| 7188677 | Tensioning system for production tubing in a riser at a floating installation for hydrocarbon production A device for tensioning and relieving production tubing (49) extending from a subsea hydrocarbon well (107) up through a riser (63) to a floating installation (87), a continuous production tubing extension (85) passing through a te... | 03/13/2007 |
| 7036396 | Drill pipe spinner device In spinner tongs, a so-called spinner (30), incorporated in an iron roughneck and thus serving to rotate a drill pipe during connection thereof to a drill string or during division of the drill string into individual pipes, the aim has been to reduce damage o... | 05/02/2006 |
| 6835026 | Riser tensioning arrangement An arrangement for transferring loads by means of one or more hydraulic cylinder-like actuators (19, 26, 40) in order to establish and maintain tension in a riser (1) of the type typically used in offshore petroleum production, where the riser (1 | 12/28/2004 |
| 6745857 | Method of drilling sub-sea oil and gas production wells A method of drilling sub-sea oil and gas production wells in which a liquid hydrocarbon substance, such as a natural gas liquid, is injected into the drilling mud supplied to the well in order to reduce the mud density. The method of the present invention enables re... | 06/08/2004 |
