This equipment has been developed to perform the repairing of damaged sections of pipelines. The current production cover a DN20"-DN26" pipe size, but studies have been performed also for a different size range.

The equipment is lowered to the bottom of the sea by installation modules after that the damaged pipeline has been cut and the section has been removed.

The system consists of the following major subassemblies

• Two end connectors that must be installed on the pipeline cut ends.

• A spool piece assembly that includes:

  - a telescopic coupling that allows the longitudinal adjustment to adapt the length of the system to the gap between the two cut ends

  - two balls couplings that connect with the pipeline end connector and allow a certain longitudinal misalignement.

  - two adapting pipes that can be welded between the tescopic coupling and the ball couplings to roughly prepare the assembly length

The installation of the equipment into the damaged pipeline is performed through the forging of the two end connector onto each pipeline cut end. The spool piece assembly is then inserted between the two end connectors and extended until its ball couplings engage the end connectors.

The operation is completed through the clamping of the ball coupling onto the connectors and through the forging of the telescopic coupling inner and outer parts, in order to make irreversible the installation .