| 主权项 |
1. A method for installing a casing window assembly, comprising:
lowering the casing window assembly into a main wellbore to a predetermined depth, the casing window assembly including a tubular casing sleeve with a casing window and an inner sleeve releasably secured within the casing sleeve at a pre-released position adjacent the casing window; releasing the inner sleeve from the casing sleeve; releasably securing the inner sleeve within the casing sleeve at a post-released position below the casing window; and removing the inner sleeve from the casing window assembly in the main wellbore. |
