Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B7/00—Special methods or apparatus for drilling
  • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Definitions

• the present invention relates to a method and thereby usable devices for trenchless laying of pipes in the ground.
• the achievable bore dimensions are sometimes already suitable to assign certain procedures of the same or another group of procedures.
• One known from the prior art method is the controlled horizontal drilling technique (Spülbohrhabilit, Horizontal Directional Drilling, HDD). This three-phase process (pilot drilling, expansion bore, retraction process) can only be used to lay tensile-resistant pipes (eg made of steel, PE or cast iron).
• the Geometric laying services are over 2,000 m and the achievable pipe diameters at a maximum of about 1,400 mm.
• controllable horizontal well technology has proven to be a reliable method of laying in suitable soil formations around the world, there are still some environmental, technical and economic disadvantages.
• rigsite and pipesite For example, large work surfaces (a few thousand square meters) are required on both sides of the obstacle to be traversed (so-called rigsite and pipesite). These areas are not always present especially in ecologically sensitive areas or imply a correspondingly negative impact on the environment when used.
• MT microtunneling
• a controlled, sometimes curved bore is usually created from a launch shaft or a starting pit to a target shaft or a target pit.
• Characteristic of this method is that pilot drilling, Aufweitbohrung and insertion process of the tubes are realized in a single step.
• This combined operation is basically carried out pushing or pushing out of the starting shaft or the starting excavation pit and the non-zugfest interconnected jacking pipes generally correspond at the same time to be laid product tubes.
• bore lengths over 500 m and drill hole diameters of more than 2,000 mm can be achieved.
• a disadvantage of this method is e.g. to see that the jacking pipes, which are usually made of concrete, remain in the hole, which causes high costs for producing the bore.
• the use of steel or PE pipes is possible in principle for MT, it is unusual due to the associated technical difficulties.
• PE pipes have e.g. a very low compressive strength and thus limit directly the possible Verlegereichweite.
• steel pipes are to be loaded axially high, but must also be installed in the starting area pipe by pipe and thereby welded together.
• a use for high-pressure pipelines as an oil or gas pipeline is not possible in this way. Presentation of the invention
• the object of the present invention is to provide a method and a device with which trenchless laying of penstocks can be achieved particularly ecological and economic conditions is possible, and thus the above-mentioned disadvantages are substantially overcome.
• the one-piece laying of the pipeline which is the later production line, allows a quality check to be carried out in advance as the pipeline is completed in its entirety before laying. It may be a pressure test and in particular an examination of the shocks such as the envelope as well as a sealing of the shocks are made.
• the inventive method it is now possible to bring a certified and tested product line cost and quickly.
• the method according to claim 3 allows a quick and therefore cost-effective installation, since set-up times, as they can make up 50% of the operating time of a drilling and laying plant, for example, when Microtunneling, are almost completely avoided.
• the advantage of the drilling apparatus according to claim 4 is that it is possible by the cutting ring to avoid damage to the piping in case of necessitating retraction of the tubing string during drilling due to, for example, rock difficulty, lag or diameter subsidence of the wellbore. Furthermore, the preferably separately provided on-site drives of the cutting tool and the cutting ring allow optimal adaptation of the respective propulsion parameters in each direction.
• An embodiment according to claim 5 allows an optimal arrangement of the cutting ring on the drilling device and an optimal use of the cutting ring for use in an insert for carrying out the inventive Process.
• Claim 6 shows an advantageous embodiment for achieving the controllability of the drill head.
• the advantageously integrated crusher according to claim allows a better removal of the cuttings, since the cuttings size homogenized after breaking present for removal.
• the use of high pressure nozzles according to claim 8 allows a particularly efficient and cost of material and wear costs rock erosion during drilling.
• the filling of the annulus between the borehole wall and piping causes in addition to the function of keeping open the borehole and a lubrication between the borehole and casing of the pipe, which can be laid with less effort and thus more cost in the progressive bore the pipeline.
• a pipeline is laid from a starting point under an obstacle to a destination point, wherein the preparation of the borehole and the laying of the pre-fabricated on the ground surface in one piece pipeline are carried out in one step, at the front end of the pipeline a controllable boring device, a pusher mounted near the launching point exerts on the pipeline thrust forces, thereby pushing the tubing from the start point to the target point, simultaneously applying the pressure forces required for the boring operation, the soil released by the boring device during the drilling operation taken and conveyed via a delivery line in the interior of the pipeline hydraulically from the well and the resulting during the installation process annulus between the pipe and the borehole wall continuously with a suitable Bo is filled.
• the combination of these features is not met by any of the existing methods.
• FIG. 1 is a schematic representation of basic applications of the method according to the invention, in part a) a drill line from an excavation under an obstacle to a pit b) a drill line from an excavation under an obstacle to a manhole c) a drill line from a pit under a shoreline to a target point on the water bottom
• Fig. 2 is a schematic representation of the method according to the invention in a drilling line from a pit under an obstacle to a pit, in part a) principle representation of the assembly of the drilling device to the prepared pipe b) schematic representation of the installation of the pipe c) schematic representation the achievement of the target point with the drilling device d) basic representation of the withdrawal of disassembly of the drilling device and possibly shortening of the pipeline at the starting point
• FIG. 3 is a schematic representation of the method according to the invention in a drilling line from a pit under a shoreline to a target point on the water bottom, in part a) principle representation of the assembly of the drilling device to the prepared pipe b) schematic representation of the installation of the pipe c) schematic representation of the achievement of the target point with the drilling device d) principle representation of the withdrawal of disassembly of the drilling device and possibly shortening of the pipeline at the starting point
• Fig. 4 is a schematic representation of the essential mechanical components of the method according to the invention.
• the starting point 1 is in a starting pit 2 and the target point 3 is in a target pit 4.
• a drilling device 6 is prepared in the starting pit 1 and connected to the pipe 8. At the same time, the pusher 5 is positioned and anchored.
• the drilling device 6 is essentially a conventional microtunnelling drilling device or pipe driving device (FIG. 2 a). Piping throughout this application is understood to mean a pipe conduit which, as a whole, conducts a product such as gas or oil, even under high pressure conditions, unlike a well supporting conduit such as microtunnelling or jacking pipes or drill pipes.
• a hole along a predetermined drilling line 7 is driven under an obstacle 9, wherein the drilling device 6 is acted upon by the pusher 5 via the pipe 8 with the force required for the drilling pressure.
• the measurement of the position of the drilling device 6 and the control of the same along the predetermined drilling line 7 are also carried out according to the common techniques of controlled pipe jacking (Fig. 2b).
• the drilling operation along the drilling line 7 is continued until the drilling device 6 has reached the target point 3 in the target excavation 4 (FIG. 2c).
• the starting point 1 is located in a starting pit 2 and the target point 3 is in a target pit 4.
• a drilling device 6 is prepared in the starting pit 1 and connected to the pipe 8. At the same time, the pusher 5 is positioned and anchored.
• the drilling device 6 is essentially a conventional microtunnelling drilling device or pipe driving device (FIG. 3 a). With the help of the drilling device 6 a hole along a predetermined drilling line 7 is driven under an obstacle 9, wherein the drilling device 6 is acted upon by the pusher 5 via the pipe 8 with the force required for the drilling pressure.
• the measurement of the position of the drilling device 6 and the control thereof along the predetermined drilling line 7 are also carried out according to the common techniques of controlled pipe jacking ( Figure 3b).
• the drilling process along the drilling line 7 is continued until the drilling device 6 has reached the target point 3 on the water bottom 10 (FIG. 3c).
• the drilling device 6 are removed from the pipe 8 and dismantled and removed the pusher 5. If necessary, the pipeline 8 is shortened in the region of the starting excavation 2 (FIG. 3d).
• the essential mechanical components of the method according to the invention are shown, where in a starting excavation 2, the boring device 6 consisting of individual modules 13 is first mounted on a guide frame 22. At the front module there is a cutting wheel 14 as a cutting tool with high-pressure nozzles and at the rear module a cutting ring 16, which is arranged centrally around a connecting module 15.
• the prefabricated and mounted on roller blocks 21 pipe 8 is then attached tensile and pressure resistant.
• the pusher 5 Near the starting pit 2 is the pusher 5, which receives the forces required for the drilling and laying process and dissipates into the soil.
• the feed line 18 connects the drilling fluid mixing plant with pump 24 with the drilling device 6 and supplies fresh drilling fluid, while the delivery line in the drilling fluid treatment plant 26 ends. There, the drilling fluid is cleaned from the cuttings and via a connecting line 25, the now fresh drilling fluid in turn the Bohr mecanicungsmischstrom be supplied with pump 24 (drilling fluid circuit). Via openings provided on the connection module 15, fresh drilling fluid is filled into the annulus between the pipeline and the borehole. Alternatively, drilling mud with cuttings in the annulus can be fed back to the drilling mud processing.

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Geology (AREA)
• Mining & Mineral Resources (AREA)
• Physics & Mathematics (AREA)
• Environmental & Geological Engineering (AREA)
• Fluid Mechanics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Excavating Of Shafts Or Tunnels (AREA)
• Earth Drilling (AREA)
• Laying Of Electric Cables Or Lines Outside (AREA)

Applications Claiming Priority (2)

Publications (2)

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• 2006
  • 2006-04-28 DE DE102006020339A patent/DE102006020339A1/de not_active Withdrawn
• 2007
  • 2007-01-19 WO PCT/EP2007/000460 patent/WO2007124789A1/fr active Application Filing
  • 2007-01-19 CA CA2650581A patent/CA2650581C/fr active Active
  • 2007-01-19 BR BRPI0711069-3A patent/BRPI0711069B1/pt active IP Right Grant
  • 2007-01-19 AU AU2007245987A patent/AU2007245987B8/en active Active
  • 2007-01-19 DE DE502007003607T patent/DE502007003607D1/de active Active
  • 2007-01-19 US US12/085,332 patent/US7942609B2/en active Active
  • 2007-01-19 RU RU2008133307/03A patent/RU2392389C2/ru active
  • 2007-01-19 AT AT07722759T patent/ATE466163T1/de active
  • 2007-01-19 EP EP07722759A patent/EP2013438B1/fr active Active
  • 2007-04-28 SA SA7280210A patent/SA07280210B1/ar unknown

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