Leadscrew and sub-sea connector

摘要

A leadscrew has first and second housing portions—which slide telescopically together. A shaft having an externally threaded portion screws into a complimentary internal threaded portion in the first housing portion, the shaft extending out of the second housing portion at a point where a fluid tight seal is provided_between the shaft and the other of the housings and allows rotation during a screwing action. The second housing includes a flanged end to which a ROV drive bucket is bolted. The shaft has a squared end so that it can be rotated relative to the bucket by the ROV. O-rings provide fluid tight seals between the two housing portions, between the flanged end and bucket, and between the shaft and bucket. A deep sea version incorporating oil bath the pressure of which is equalised to that of the surrounding sea so that O-rings do not have to withstand large pressure differences.

主权项

1. A leadscrew comprising:
first and second housing portions in which said first housing portion slides telescopically within said second housing portion; first seal means providing a fluid seal between said first and second housing portions; a shaft having an externally threaded portion adapted to screw into a complimentary internal threaded portion in said first housing portion, said shaft extending out of said second housing portion and having an external engagement portion for external rotation of said shaft; and at least one further seal means providing a fluid seal between said shaft and said second housing portion, wherein said further seal means comprises a second seal means providing a fluid tight seal between said second housing portion and a part of a drive assembly and a third seal means providing a fluid tight seal between said part and said shaft.