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Assignee: Schlumberger WCP Ltd.

Location: GB
No. of patents: 1

Number	Title	Issue Date
6962214	Rotary seal for directional drilling tools A rotary valve assembly for a rotary steerable tool is disclosed for directing flow of an abrasive laden drilling fluid; the valve assembly has a first sealing surface rotatably engaging a second sealing surface. At least one of the surfaces has at least about 5% of...	11/08/2005