| 摘要 |
A floating seal adapted particularly for sealing the bearings in a drill string for deep wells. The seal has an outer slide ring slidable longitudinally in the drill casing and an internal support ring mounted in the slide ring against relative axial displacement but adapted for eccentric radial displacement of the mounting ring relative to the slide ring. Rotary discs are provided in the outer slide ring to allow axial displacement of the slide ring but to resist rotary displacement of the slide ring in the casing. The mounting ring is mounted in the slide ring to afford radial displacement of the mounting ring but to resist relative rotational displacement between the mounting ring and the slide ring. Seals are provided between the outer surface of the slide ring and the interior surface of the casing; between the interior surface of the mounting ring and the exterior surface of the shaft; and also between the slide ring and the mounting ring.
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