| 摘要 |
A seal assembly for a valve in a mechanical setting retrievable and pressure balanced packer has a valve seal mounted on a bushing mounted around a mandrel joined to an anchor and enclosed within a balance chamber housing. The valve seal is retained between the bushing and an overlapping coaxial face seal retainer such that only a relatively small portion of the face seal ring will contact the seal surface of a valve seat on the packer.
|
