TH83158B - Methods and equipment for trenchless pipe laying. - Google Patents

Abstract

The DC60, using a trenchless pipe laying method, constructs the delivery pipe (8) from the starting point (1) to the target point (3), which crosses beneath the obstruction (9), where the borehole (12) construction and the pre-fabricated delivery pipe (8), which is being constructed as a single piece on the surface, are carried out in a single step. At the forward end of the delivery pipe (8), a directional drilling device (6) is placed, and a pipe pushing device (5) is placed at the starting point (1), which exerts an external force on the delivery pipe (8) through traction, which should ideally be chosen as friction, by pushing the delivery pipe (8) from the starting point (1) to the target point (3). At the same time, the contact force necessary for drilling is transmitted, the drilled material generated during drilling by the drilling device (6) is removed and transported hydraulically out of the borehole (12) through the transport line in the delivery pipe (8), and the annular gap between the delivery pipe (8) and the borehole wall (11) is created during continuous filling by the drilling support system. With the method for laying the pipe without digging, the pipe (8) is constructed from the starting point (1) to the target point (3), which crosses underneath the obstruction (9), in which the borehole (12) is constructed and the prefabricated pipe (8) is laid, which is being constructed as a single piece on the surface, is done in one step, at the forward end of the pipe (8) a directional drilling device (6) is set up, and a pipe pushing device (5) is set up at the starting point (1) which exerts an external force on the pipe (8) through traction, which should ideally be chosen as friction, by pushing the pipe (8) from the starting point (1) to the target point (3), at the same time the contact force necessary for drilling is transmitted, the drilled material generated during drilling by the drilling device (6) is removed and transported hydraulically out of the borehole (12) through the transport line in the pipe (8), and the annular gap between the pipe (8) and the borehole wall (11) is created during continuous filling by the drilling support system.

Claims (9)

Revised 18/06/2021 Claims not available ---------------------------------------------------------------------------------------------------- ------07/02/2019------(OCR) Page 1 of 2 Claims 1. A method for laying pipes without drilling troughs consisting of the following steps: Work is performed to produce a predetermined drilling axis (7), and the delivery pipe (8) is laid in a single piece in one working step, where the required forces for drilling and laying are transmitted to the drilling equipment (6) through the delivery pipe (8); the front end of the delivery pipe (8) is connected to the directional drilling equipment (6); external forces are applied to the delivery pipe (8) by coupling and/or friction by means of the propeller (5), thus the delivery pipe (8) is propelled from the starting point (1) to the target point (3); the cut sections released by the drilling equipment (6) during drilling operations are removed and conveyed out of the drill hole by hydraulic means. 1. The filling of the annular gap between the pipe (8) and the borehole wall (11) produced during continuous fluid laying operations. 2. The method under claim 1, which is characterized by the pipe having an outer diameter of at least 400 mm. 3. The method under claim 1 or 2, which is characterized by the drilling and pipe (8) laying operations being carried out simultaneously and relatively continuously. 4. Any of the methods under claim 1 to 3, which is characterized by the pipe (8) being a product pipe. 5. The method under claim 4, which is characterized by the pipe (8) being qualitatively and/or pressure tested prior to insertion. 6. Any of the methods under claim 1 to 5, which is characterized by the outer diameter of the drilling equipment (6) being larger than the outer diameter of the pipe (8). 7. Any of the methods under claim 1 to 5. 8. The method under claim 7, which is characterized by the retraction of the pipe (8) in the event of a problem occurring during drilling and laying operations. 9. A grooveless pipe laying drilling device for use with any of the methods under claims 1 through 8, in which the drilling device (6) can be directed. The drilling device (6) with the drill head and bending tool (14) is arranged on its opposite end face. The drilling device (6) has a connecting module. (15) is located on its rear end surface for connection to the pipe (8), and the rear end surface of the drilling device (6) is provided with a bending ring (16) on which the cutting tool (14) and/or the cutting ring (16) are driven by at least one existing receiver. Page 2 of 2 of 10. A drilling device according to claim 9 which is characterized by the outer diameter of the cutting ring (16) being only slightly smaller than the outer diameter of the drilling cutter and its inner diameter being only slightly larger than the inner diameter of the connecting module (15). 11. A drilling device according to claim 9 or 10 which is characterized by the directional drilling device being composed of at least two modules (13). 12. Any drilling device under claims 9 to 11 which is characterized that the crusher is integrated into a single module (13) of the drilling device (6). 13. Any drilling device under claims 9 to 12 which is characterized that the high-pressure nozzle from which drilling fluid is pumped under high pressure is mounted on the cutting tool (14) of the drilling device (6) and/or in such a way that the cutting tool (14) and the cutting ring (16) can be driven separately. 14. Any drilling device under claims 9 to 13 which is characterized that the opening is made on a connecting module. (15) The opening is made into an annular gap from which, during the drilling operation, is between the borehole (11) and the delivery pipe (8) and is filled with drilling fluid. 15. Any drilling device according to claims 9 to 14, which is characterized by a high-pressure nozzle from which drilling fluid is pumped out under high pressure, is mounted on the cutting ring (16) of the drilling device (6), which is appropriately, during the retrieval ------------ 1. Method for laying pipes without drilling, which consists of the following steps: Follow the work procedure for creating a borehole along the specified drilling axis (7) and lay the pre-assembled delivery pipe (8) as a single unit in a single work procedure, in which the contact forces required for drilling and laying are transmitted to the drilling equipment (6) via the delivery pipe (8). Connect the front end of the delivery pipe (8) to the directional drilling equipment (6), which, as appropriate, is connected to the delivery pipe (8) via a connecting module (15). Apply an external force to the delivery pipe (8) via traction, which, as appropriate, is friction by the pipe jacking device (5), which pushes the delivery pipe (8) from the starting point (1) to the target point (3). Remove the drilling material generated during drilling and transport it hydraulically out of the borehole (12). Fill the annular gap between the delivery pipe (8) and the borehole wall (11) that was created during fluid-assisted continuous drilling. 2. Methods under claim 1 in which the pipe (8) has an outer diameter of at least 400 mm and/or in which the outer diameter of the drilling equipment (6) is larger than the outer diameter of the pipe (8). 3. The method under claim 1 or 2, in which the drilling and placement procedures are performed simultaneously and continuously for the most part. 4. Drilling equipment for pipe laying without excavation, specifically for use in one of the methods under claims 1 to 3, in which the drilling equipment (6) is directional, in which the front face of the drill head is provided with a cutting tool (14), in which the rear face of the connecting module (15) for connection to the pipeline (8) is provided, and in which the rear face of the drilling equipment (6) is provided with a cutting ring (16), in which the driving of the cutting tool (14) and/or the cutting ring (16) is performed by at least one driver, and in which, as should be selected, the cutting tool (14) and the cutting ring (16) can be driven separately. 5. The device under claim 4 in which the outer diameter of the cutting ring (16) is slightly smaller than the outer diameter of the drill head and the inner diameter of the cutting ring is slightly larger than the inner diameter of the connecting module (15). 6. The equipment under claim 4 or 5, which the directional drilling equipment (6) is made of at least two interconnected modules (13), such modules are flexiblely connected by at least two directional cylinders. 7. One of the devices under claims 4 to 6 in which the crusher is integrated into Module 1 (13) of the drilling device (6). 8. One of the devices under claims 4 to 7 in which a high-pressure nozzle is fitted to the cutting tool (14) and/or cutting ring (16) of the drilling device (6) from which the drilling suspension is pumped at high pressure, while for the cutting ring (16) as should be selected, then while drawing back. 9. One device under claims 4 to 8 in which an opening is made at the welded module (15) in which the annular gap between the pipe (8) and the borehole wall (11) is filled with the drilling suspension therein.