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| Number | Title | Issue Date |
| 6588981 | Pipe handling apparatus A pipe handling apparatus for laying elongate articles in deep waters includes a tiltable pipe handling structure housing a traveling clamp for holding and/or paying out under tension the elongate article and a fixed clamp. The traveling clamp is driven v... | 07/08/2003 |
| 6364036 | Automatic rod assembly The invention pertains to a method for introducing and removing rod sections into and from the push/pull axis of a push/pull unit, the individual rod sections being essentially arranged one after another and being joined to one another or detached from on... | 04/02/2002 |
| 4604724 | Automated apparatus for handling elongated well elements such as pipes A derrick is provided with a vertically movable elevator for suspending a string of elongated well elements, such as pipes. An immovable lower support is provided for suspending the string, and an automatic tong is provided for screwing and unscrewing pip... | 08/05/1986 |
