Swivel seal assembly for washpipe

摘要

A seal assembly, for sealing between a stationary conduit (18) and a rotating conduit (20), comprises an upper gland assembly (14), a washpipe (16), and a lower gland assembly (12). The upper gland assembly (14) engages the stationary conduit (18). An upper seal member (44) is disposed within the upper gland assembly (14) around a periphery of the washpipe (16). An upper packing ring (43) compresses the upper seal member (44) into sealing engagement with the washpipe (16). The lower gland assembly (12) is disposed about the washpipe (16) and is operable to engage the rotating conduit (20). A lower seal member (30) is disposed within the lower gland assembly (12) and is compressed into sealing engagement with the washpipe (16) by a lower packing ring (24-28).