Internal pipeline plug for deep subsea pipe-to-pipe pull-in connection operations

摘要

Pressure-tight pipeline plugs are used in subsea connection operations to achieve a lightweight pipe condition which facilitates alignment by easing handling problems. An internal plug is provided for this purpose which is particularly useful for connection operations using a pipe-to-pipe pull-in technique and is capable of sealing, remotely releasing and then being pumped through the line to a terminus.