Patent ID: 9074423
Filing Date: 2015-07-07
Classification: B29C,E21B,F16L

Abstract:
1. An apparatus for inserting a pipe via a pit into an underground borehole, comprising: a deformation device comprising first, second and third pressing elements and constructed to flatten the pipe from an original substantially circular cross-section into a first oval cross-section having a first major radial axis before the pipe enters the pit, a guiding device constructed to redirect the flattened pipe in the pit in a direction of an axis of the borehole, and a re-deformation device having a re-deformation ring forming an inlet having an inner cross-section, with the inner cross-section of the re-deformation ring tapering, starting from the inlet, towards an oval or elliptical re-deformation exit opening having a major axis perpendicular to the first major radial axis and having a circumference corresponding substantially to a circumference of the pipe, wherein the exit opening is constructed to re-deform the redirected pipe beyond the original substantially circular cross-section into a second oval cross-section having a second major radial axis perpendicular to the first major radial axis before the pipe enters the borehole, wherein the first pressing element is fixedly attached to a frame of the deformation device, and the second and third pressing elements are pivotally attached to the frame of the deformation device such that the distance between the second and third pressing elements, and the first pressing element, may be varied.