A system for advancing an article along a path , comprising: a head member ; a dispatching member having an annular shape and configured with a perimetric rim ; and an eversion sleeve configured with an outside portion having a sleeve end configured to be sealingly circumferentially fixed to the perimetric rim of the dispatching member , an everting portion configured for slidingly articulating to the head member and an inside portion configured to extend from the everting portion towards the dispatching member ; said inside portion and said outside portion are configured to form a space therebetween for receiving a propelling fluid for exerting force (F) on the everting portion , thereby gradually advancing a segment of the inside portion towards the head member causing it to slidingly displace with respect to the head member and gradually advancing a respective segment of the everting portion into the outside portion , thereby everting said eversion sleeve inside out and advancing the head member along the path ; characterized in that said head member is configured with an internal portion configured for facilitating the everting portion to slide with respect to the head member , in that the internal portion comprises at least one narrow portion having a first cross-sectional diameter D1 taken perpendicularly to its length and at least one wide portion having a second cross-sectional diameter D2 taken perpendicularly to its length, which is greater than D1 and disposed further from the dispatching member than the narrow portion , in that the everting portion is configured with an external surface and an internal surface , and in that said at least one narrow portion is configured to engage the external surface of the everting portion and to prevent axial displacement of the head member with respect to the everting portion , while allowing the everting portion to slidingly displace with respect to the internal portion . a head member ; a dispatching member having an annular shape and configured with a perimetric rim ; and an eversion sleeve configured with an outside portion having a sleeve end configured to be sealingly circumferentially fixed to the perimetric rim of the dispatching member , an everting portion configured for slidingly articulating to the head member and an inside portion configured to extend from the everting portion towards the dispatching member ; said inside portion and said outside portion are configured to form a space therebetween for receiving a propelling fluid for exerting force (F) on the everting portion , thereby gradually advancing a segment of the inside portion towards the head member causing it to slidingly displace with respect to the head member and gradually advancing a respective segment of the everting portion into the outside portion , thereby everting said eversion sleeve inside out and advancing the head member along the path ; characterized in that said head member is configured with an internal portion configured for facilitating the everting portion to slide with respect to the head member , in that the internal portion comprises at least one narrow portion having a first cross-sectional diameter D1 taken perpendicularly to its length and at least one wide portion having a second cross-sectional diameter D2 taken perpendicularly to its length, which is greater than D1 and disposed further from the dispatching member than the narrow portion , in that the everting portion is configured with an external surface and an internal surface , and in that said at least one narrow portion is configured to engage the external surface of the everting portion and to prevent axial displacement of the head member with respect to the everting portion , while allowing the everting portion to slidingly displace with respect to the internal portion . <EOS>