Method for installing a tube or a bundle of tubes in an existing tubular duct
AssigneeKoninklijke KPN N.V.
InventorWillem Griffioen
Life of this patent
Estimating the term…
Abstract
A method for installing a tube or a bundle of tubes in an existing tubular conduit. The tube or tubes are passed into the existing tube by means of a fluid under pressure which is introduced into the existing tube at the inlet end. The tube or tubes can be open or closed at their forward end and are connected to a guide device and/or a pulling device. The existing tube can be open or closed at the end. With the method according to the invention, tubes can installed in an existing tube in a flexible and efficient manner, which tubes can be used for various purposes, for instance as an envelope of telecommunication cables.
Claims16
A method for installing a tube or a bundle of tubes into an existing tube, comprising:
- introducing a fluid under pressure into the existing tube at an inlet end thereof, and feeding the tube or bundle of tubes into the existing tube through the inlet end thereof;
- wherein a forward end of the tube or at least one of the tubes to be installed is open, so that at least a part of the fluid under pressure introduced into the existing tube flows back via an interior of the tube or tubes to be installed.
A method for installing a tube or a bundle of tubes in an existing tube, comprising:
- connecting a forward end of the tube or tubes to be installed to a shuttle so as to be resistant to tensile strain, said shuttle having substantially the same cross-sectional dimension as an interior of the existing tube;
- bringing the shuttle into an inlet end of the existing tube;
- and
- introducing a fluid under pressure into the existing tube at an inlet end thereof and against the shuttle to cause the shuttle to move along the existing tube,
- wherein the forward end of the tube or at least one of the tubes to be installed is open, so that at least a part of the fluid under pressure introduced into the existing tube flows back via an interior of the tube or tubes to be installed.
A method for installing a tube or a bundle of tubes into an existing tube, comprising:
- introducing a fluid under pressure into the existing tube at an inlet end thereof, and feeding the tube or bundle of tubes into the existing tube through the inlet end thereof;
- wherein an end of the existing tube, opposite the inlet end of the existing tube is closed, and
- wherein a forward end of the tube or at least one of the tubes to be installed is open, so that the fluid under pressure introduced into the existing tube flows back via an interior of the tube or tubes to be installed.
Dependencies are inferred from the claim text.