Patent ID: 9145982
Filing Date: 2015-09-29
Classification: E21B,F16L

Abstract:
1. A method for installing a new pipe and/or replacing an existing underground pipe by a new one, wherein the new pipe is a module pipe comprised of a number of module pipes, comprising the steps of: ascertaining at least two points at the existing underground pipe or in the soil where a new pipe is to be installed, providing open excavations, manhole shafts or existing pipe access points in the at least two points, positioning a push/pull unit in one of said excavations or manhole shafts or at one of said pipe access points, connecting a pulling element to the push/pull unit, connecting a tool to the pulling element, pushing or pulling said pulling element through said existing underground pipe or through a pilot bore in the ground so that said tool breaks said existing underground pipe or increases a diameter of said pilot bore in the ground, attaching said module pipe to said pulling element by using the tool, pushing and/or pulling said module pipe through the existing underground pipe by using the pulling element driven by the push/pull unit, characterized in that the method comprises the step of screwing a second and further module pipe together with the first or consecutive module pipe if the first or consecutive module pipe has mainly been pushed or pulled into the existing underground pipe.