| 摘要 |
Well completion apparatus for disposition in a well conduit comprising first and second seal assemblies. The first seal assembly comprises a first cylindrical receptacle member fixed with respect to the well conduit and a first insert member including a first tubular body portion received within the first receptacle member. One of the first members includes a first annular seal coaxial with and sealingly engaged between the first receptacle member and the first tubular body portion. The second seal assembly comprises a second cylindrical receptacle member rigidly adjoining the first tubular body portion and a second insert member including a second tubular body portion received within the second receptacle member. One of the second members includes a second annular seal means coaxial with and sealingly engaged between the second receptacle member and the second tubular body portion. The second insert member is longitudinally slidable within the second receptacle member and its outer diameter adjacent the second seal is less than the outer diameter of the first insert member adjacent the first seal.
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