Upon completion of the reaming process, the product pipe shall be pulled in and installed inside the HDD borehole. This process is done by connecting a pulling head to the leading end of the product pipe and attaching the pulling head to the pullback assembly. The pullback assembly, together with the product pipe, shall then be pulled in the HDD borehole by the HDD Rig. The process is completed once the pullback assembly together with the product pipeline reaches the surface at the Rig side. The pullback assembly shall be dismantled from the product pipe for pipe tie-in or other works to follow.