sense of rotation engages the tube the guides 4 5 are provided with rollers over which the tube 2 can roll in axial direction preferably the rollers are provided with steering pins and designed as castoring wheels so that they can also accommodate to any rotation of the tube 2 owing to the bent course of the guide path the proximal end of the tube 2 is located away from the line of the well 1 the guides 4 5 provide that the proximal end 10 of the tube 2 is oriented substantially horizontally in the area of a connecting device 6 the geometry of the path along which the tube 2 passes is such that the tube 2 is substantially exclusively elastically deformed as a consequence the mechanical properties of the tube 2 remain substantially intact and no deformations or damage to the tube occur to achieve this the radius of each bend in the path of the tube 2 should be so large as to give rise only to elastic deformation of the tube 2 as it passes through the bend the minimum allowable radius depends inter alia on the geometry and material properties of the tube used for certain kinds of tubes which are often used in oil extraction such as 3 5 6 inch for instance a radius in the order of 10 20 m and preferably 13 17 m can be utilized by means of the connecting device 6 the tube 2 can be extended by a next tube part 8 such tube parts 8 are present in a storage 11 where these tube parts 8 in this example are stored horizontally and parallel to an end portion of.