Hawser chain seal assembly

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

24116R, 114180, 114200, 138 93, 277188A, 277235R, B63B 2118, F16J 1500

Patent

active

046798005

ABSTRACT:
A hawser chain assembly and method for installation of its sealing element is disclosed. The assembly includes a housing adapted for connection in series with a hawser pipe of a marine vessel such as a semi-submersible drilling rig. The housing may be moved to an open position for installation or replacement of the sealing element, and a closed position to longitudinally surround and secure the sealing element. The sealing element has at least two semi-cylindrical elastomeric parts, each of which is adapted for placement partially about the hawser chain when the housing is in the open position. Each semi-cylindrical part has at least one inflatable bladder. A manifold is provided by which fluid pressure may be introduced to the bladders of the sealing element causing them to expand. The sealing element is restricted on its outer diameter by the closed housing causing the elastomeric material to move inwardly forming a sealing engagement with the chain.

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