Tube haen can be seen for deep boreholes, in particular under water holes, with a sealing device for sealing between concentric seal surfaces

摘要

A well casing hanger is provided with a seal deformable into sealing engagement with opposed cylindrical walls of the casing hanger body and another body upon axial compression of the seal. The seal is compound and includes metallic end rings on a cylindrical elastomeric body, the end rings having marginal lips which are deformed oppositely into metal-to-metal sealing engagement with the cylindrical walls and form a seal closing the peripheral gap between the end rings and the cylindrical walls. The elastomeric body is also deformed into sealing engagement with the cylindrical walls and confined by the metallic lips against extruding between the end rings and the cylindrical walls.