Liner Tie-Back String

Liner Tie-Back String

A string of casing can be run at a later date after a liner has been installed and joined to it as long as the liner hanger assembly top (or weight set packer top, if it has been run) has been provided with a setting sleeve with tie-back extension (standard machined or PBR).

Reasons to run a tie-back string of casing include:

  • damaged production casing due wear or corrosion
  • upgrading of the production annulus to a higher working pressure, e . . .

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