US20200325735A1 - Drill pipe, and system and method for laying a pipeline - Google Patents
Drill pipe, and system and method for laying a pipeline Download PDFInfo
- Publication number
- US20200325735A1 US20200325735A1 US16/913,209 US202016913209A US2020325735A1 US 20200325735 A1 US20200325735 A1 US 20200325735A1 US 202016913209 A US202016913209 A US 202016913209A US 2020325735 A1 US2020325735 A1 US 2020325735A1
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- United States
- Prior art keywords
- connection
- drill pipe
- drill
- tensile
- resistant
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- Abandoned
Links
- 238000000034 method Methods 0.000 title description 21
- 238000005553 drilling Methods 0.000 claims abstract description 41
- 238000007373 indentation Methods 0.000 claims description 40
- 238000010008 shearing Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 description 20
- 230000033001 locomotion Effects 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- 229910000278 bentonite Inorganic materials 0.000 description 6
- 239000000440 bentonite Substances 0.000 description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002986 polymer concrete Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B7/205—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
Definitions
- the invention relates to a drill pipe for use during the creation of a borehole in a ground from a starting point to a target point along a predetermined drill line, in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is gradually created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced.
- the invention relates to a device for moving at least one drill pipe into a borehole or out from it, especially during the near-surface creation of a borehole in a ground from a starting point to a target point and/or when placing a pipeline or underground line or an underground cable in the ground from a starting point to a target point or vice versa, with at least one base, with at least one abutment, with at least one actuator for moving the at least one drill pipe, being operatively connected to the base, with a transmission element, being operatively connected to the actuator, for transmitting the movement produced by the at least one actuator to the at least one drill pipe, as well as a system and a method for the creation of a borehole in the ground from a starting point to a target point along a predetermined drill line, in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is gradually created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced.
- the open ditch method is used during a near-surface laying of underground cables, underground lines and also conduits (such as pipelines). This sometimes causes substantial operations along the route and involves an expense which should not be underestimated for ditch excavation and refilling.
- This sometimes causes substantial operations along the route and involves an expense which should not be underestimated for ditch excavation and refilling.
- two ditch profiles each with 5.5 m width and 2.15 m depth.
- the separation of the individual soil layers has proven to be especially complicated, requiring several separate clamps. This is necessary in order to restore the soil quality to the original state during the later refilling of the ditch.
- a construction service area of around 40 m must be kept open during the construction work, while after completion of the construction work a cable protection zone of around 23 m must be kept accessible.
- the microtunnel drilling technique is up to 300 mm. For a reach length of up to or more than 1.5 km, it has still been necessary to resort to a microtunnel drilling technique with a diameter of around 1000 mm. However, with increasing diameter the space required for the construction zone layout and the costs increase significantly. Therefore, so far this technique has not been economically feasible. Moreover, the pipelines of the microtunnel drilling technique are only plugged together, so that only compressive but no tensile forces can be transmitted.
- a pilot borehole is first made, using a rotating drill head and drill string, from the starting point in the direction of a target point.
- the position accuracy is ensured by a measurement system, which is arranged behind the drill head.
- the removed material is delivered to the surface with a bentonite suspension.
- the bentonite suspension is pumped through the drill string directly to the nozzles arranged at the drill head. The suspension mixes with the loosened soil and flows back through the annular space between drill string and ground to the starting point.
- the drilling device After reaching the target point, the drilling device is removed. Furthermore, the drill pipes laid are removed once more and the plastic pipe is placed in the ground at the same time or after a delay. It is necessary to transmit tensile forces onto and across the drill pipes and accordingly once a drill pipe has been removed from the borehole it must be separated from the drill string in order to use it again.
- the problem of the invention is therefore to overcome the aforementioned drawbacks, especially to reduce the set-up times and to make possible the transmitting of tensile forces in the drill string.
- a drill pipe in a first embodiment in that the drill pipe has at each of its ends at least one connection section for detachably connecting it to a further element of a drill string in a tensile-resistant manner, in that the drill pipe has at least one element for producing a tensile-resistant connection to a corresponding element of an advancing device for advancing the drill pipe into and/or retracting it from the borehole, and in that an outer wall of the drill pipe is made in one piece.
- a tensile-resistant drill string can be produced with such a drill pipe in a simple manner, one which is designed to be advanced and/or retracted.
- the drill pipe has at each of its ends at least one connection section for detachably connecting it to a further element of a drill string in a tensile-resistant manner, that the drill pipe has at least one element for producing a tensile-resistant connection to a corresponding element of an advancing device for advancing the drill pipe into and/or retracting it from the borehole, and that the drill pipe consists of at least two shell elements which are axially connectable to the drill pipe.
- the supply lines of the drilling device By dividing the drill pipe into shell elements it is possible to lay the supply lines of the drilling device, coupled together as a hose pack, in a lower portion of the shell elements and to close them with the other shell elements as a kind of lid.
- the supply lines may therefore be provided, for example, wound up on a drum over the full drilling length. Fragmenting of the supply lines during microtunneling is reduced or eliminated, which significantly decreases the set-up times.
- connection region of a shell element is provided with at least one seal. In this way, pressure tightness of the drill pipe can be provided in a simple fashion.
- connection by the respective connection sections of the drill pipe to another element of the drill string occurs in the form of a positive-locking and/or non-positive-locking connection.
- the drill pipe has at its first end a first connection section and at its opposite second end a second connection section corresponding to the first connection section.
- first connection section and the second corresponding connection section in the mounted state form a flange connection, having connection elements and/or boreholes for the placement of a bolt connection.
- a tensile-resistant connection between the drill pipes can be provided in a simple and economical manner.
- first connection section and the second corresponding connection section form a tensile-resistant plug-in sleeve connection, wherein one connection section has a pointed end and the other connection section is a corresponding sleeve, each of them having at least one corresponding indentation in the opposite surface, which form a groove in the assembled state in which at least one shearing element can be inserted to produce the tensile-resistant supporting connection.
- one connection section has a pointed end and the other connection section is a corresponding sleeve, each of them having at least one corresponding indentation in the opposite surface, which form a groove in the assembled state in which at least one shearing element can be inserted to produce the tensile-resistant supporting connection.
- the element for producing a tensile-resistant connection with the corresponding element of the advancing device is an indentation in the outer wall of the drill pipe. In this way, it is possible in an easy manner to enable a movement of the drill pipe via a movement device, such as a press frame for example, in a tensile-resistant manner and with substantially less set-up time.
- the indentation can be provided with a covering. This is advantageous for avoiding stones and the like from getting jammed in the indentation in the ground.
- the element for producing a tensile-resistant connection with the corresponding element of the advancing device is an element of a tensile-resistant plug-in sleeve connection.
- the drill pipe has at least one conduit section arranged in the outer wall and/or in the inner space of the drill pipe at the outer wall and extending in parallel along the outer wall, wherein the at least one conduit section has at each of its ends a connection element for producing a connection between conduit sections of interconnected drill pipes or elements of the drill string.
- the conduits serve for example for the transport of bentonite, as a driving line for the driving of a pump, as a feed line for transporting away the drill cuttings, for bringing in electrical lines, as a high-pressure conduit or as a delivery line for the mixture of washing liquid and drill cuttings/loosened soil.
- the conduits have, for example, a plug-in sleeve system, possibly with gaskets, so that the conduits can be plugged into one another. In this way, the set-up times for providing the supply lines can be substantially reduced.
- the drill pipes according to the invention have a length of more than 8 m. This likewise significantly reduces the set-up times.
- the drill pipe has at least one indentation in its wall for producing a connection with an advancing device for advancing the drill pipe into and/or retracting it from the borehole.
- a positive locking can be implemented in this way for easier transmitting of advancing forces to the outer surface.
- At least one manipulating element has an element for producing a connection with a shell element, for example in the form of a gripping element, which preferably engages in an indentation in the surface of the shell element, a magnetic element, or a suction or vacuum element.
- a supporting connection can easily be provided for the lifting of the shell element.
- a further solution of the invention proposes in regard to the movement device that a guide element is provided which is movable relative to the base and operatively connected to the transmission element, that the transmission element has at least one positive-locking element for the transmission of the motion, being designed such that a tensile-resistant releasable connection exists between transmission element and drill pipe.
- the at least one actuator is a hydraulic cylinder and/or a rack and pinion drive.
- they are simple actuators which are maintenance-free and able to provide the required forces.
- the positive-locking element has at least one engaging element which provides the tensile-resistant releasable connection by engaging with an engaging section of the drill pipe, preferably on its outer wall.
- the at least one engaging element is designed so that it encloses the drill pipe, wherein preferably the positive-locking element has at least two engaging elements, which are especially preferably arranged horizontally and/or vertically movable in the positive-locking element.
- the at least one engaging element is a connection section corresponding to a connection section of the drill pipe.
- the connection sections form a tensile-resistant plug-in sleeve connection, wherein the engaging element has either a pointed end or a sleeve corresponding to the pointed end, each of them having at least one corresponding indentation in the opposite surfaces, which form a groove in the assembled state in which at least one shearing element can be inserted to produce the tensile-resistant supporting connection.
- Another teaching of the invention proposes that a starting seal is provided, preferably in connection with the base.
- Another solution of the invention proposes a device for the mounting of a drill pipe as described above for use during the creation of a borehole in the ground from a starting point to a target point along a predetermined drill line, in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is gradually created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced, with a feed area for the shell elements, with a mounting area for connecting the shell elements, with manipulating elements for receiving, moving and positioning the shell elements in the mounting area, with at least one advancing element and/or at least one rotating element for the positioning of the shell elements in the mounting area.
- Another teaching of the invention proposes that the shell elements are positionable about a supply line of the drilling device.
- Another teaching of the invention proposes that has at least one manipulating element with a gripping element for producing a connection with a shell element, which preferably engages in an indentation in the surface of the shell element.
- manipulating elements are horizontally and vertically movable, so that the shell elements are movable from the feed area to the mounting area.
- Another solution of the invention proposes in regard to the system that the drill pipes are the drill pipes described above, and an advancing device as described above is provided for the moving of the drilling device by the advancing of the drill string.
- a device as described above is provided for the mounting of a drill pipe.
- Another teaching of the invention proposes that the drill pipes are arranged in the drill string such that the axial connection regions of the shell elements are arranged offset relative to each other.
- Another solution of the invention proposes in regard to the method that the previously described drill pipes are used, which are moved in the borehole, mounted on a drill string, by means of an advancing device as described above.
- a device for the mounting of a drill pipe is used as described above.
- Another teaching of the invention proposes that the drill pipes are arranged in the drill string such that the axial connection regions of the shell elements are arranged offset relative to each other.
- solutions of the invention are not limited to the near-surface laying of pipelines, underground cables or underground lines in the ground. Instead, the aforementioned problem can likewise be employed in classical microtunneling with large diameters, for example with concrete pipes.
- the solutions according to the invention can significantly reduce the set-up times and substantially eliminate lengthening the supply lines and installing advancing pipes in the drilling area with respect to installations and supply lines.
- the drill pipe may also be a product pipe at the same time, which as such remains in the ground and does not have to be removed again from the ground for the pulling in of the product pipe.
- FIGS. 1A,1B side views of a first embodiment of a drill pipe according to the invention
- FIG. 2A a first connection section of the drill pipe according to the invention
- FIG. 2B a second connection section of the drill pipe according to the invention
- FIG. 2C the connection section of FIG. 2A without covering
- FIG. 2D a side view of FIG. 2C .
- FIG. 3A the connection section of two interconnected drill pipes according to the invention
- FIG. 3B a side view of FIG. 3A .
- FIG. 4A a spatial view of a first embodiment of a device according to the invention for moving a drill pipe in a first position
- FIG. 4B a spatial view of the device according to the invention for moving a drill pipe in a second position
- FIG. 5A a spatial view similar to FIG. 4A with the first embodiment of the drill pipe according to the invention
- FIG. 5B a spatial view similar to FIG. 4B with the first embodiment of the drill pipe according to the invention
- FIG. 5C a top view of FIG. 5A .
- FIG. 5D a top view of FIG. 5B .
- FIG. 6A a side view of a first transmission element according to the invention of the first embodiment of the device according to the invention with engaging elements in a first position
- FIG. 6B a similar view to FIG. 6A with engaging elements according to the invention in a second position
- FIG. 7 a schematic representation of a first system according to the invention in spatial view after finishing the drilling process
- FIG. 8 a schematic representation in spatial view at the start of the pulling in of the conduit
- FIG. 9 a cross sectional view of a second embodiment according to the invention of two interconnected drill pipes according to the invention in a second embodiment.
- FIG. 10 a schematic representation of a second embodiment of the system according to the invention in side view
- FIG. 11 a top view of FIG. 10 .
- FIG. 12 a spatial view of FIG. 10 .
- FIGS. 13 to 19 a schematic representation of an embodiment of a mounting device according to the invention with the individual mounting steps
- FIG. 20 a spatial schematic representation of a third embodiment of a drill pipe according to the invention.
- FIG. 21 a spatial schematic representation of two connected drill pipes for this
- FIG. 22 a side view of FIG. 21 .
- FIG. 23 a spatial schematic representation of a shell element.
- FIGS. 1A, 1B show in side view a first embodiment of a drill pipe 10 according to the invention.
- the drill pipe 10 has at its first end a first connection section 11 and at its opposite second end a second connection section 12 , wherein the first connection section 11 corresponds to the second connection section 12 inasmuch as these may be joined together or inserted into one another.
- the first connection section 11 and the second connection section 12 are provided such that they form a flange connection in a first embodiment of the invention, wherein the first connection section 11 has a support section 13 , in which boreholes 14 are provided. Behind the support section 13 is provided an indentation 15 in the outer wall 16 of the drill pipe 10 . (See FIG. 2A to 2D ).
- boreholes 14 Corresponding to the boreholes 14 , recesses 17 are provided in the indentation 15 . Furthermore, boreholes 18 are provided in the support section 13 , being designed such that centering pins 19 , provided on the second connection section 12 , can engage in them.
- the second connection section 12 likewise has a support element 20 , on which either bolts 21 are firmly arranged, or in which boreholes 31 are provided, containing a thread in which loose bolts 21 are screwed into the recesses 17 through the boreholes 14 into the threaded boreholes 31 in the support section 20 .
- the indentation 15 may be closed with a covering 22 .
- the covering 22 is fastened in the indentation 15 for example by means of screws.
- the covering serves to prevent any objects from gathering in the indentation 15 or in the recesses 17 while the drill pipe 10 is moving in the borehole.
- conduits Inside the drill pipe 10 are firmly arranged several conduits. These include a delivery line 23 for taking away loosened soil or drill cuttings in connection with drill flushing/drilling/bentonite suspension, a pressing line 24 , with which for example a bentonite suspension is introduced to penetrate as a lubricating agent between drill pipes and borehole wall, a driving line 25 , with which for example driving fluid is transported to the drilling device in order to drive a jet pump optionally present there (not shown), a feed line 26 with which for example a bentonite suspension is transported to the drill head, with which the drill cuttings or the loosened dirt is then transported out from the borehole and the working face in front of the drilling tool is supported, and a channel 27 , in which are provided for example high-pressure lines for the spray system of the cutting tools or power lines for the power supply for the drilling device.
- a delivery line 23 for taking away loosened soil or drill cuttings in connection with drill flushing/drilling/bentonite suspension
- the conduits are connected by a plug-in sleeve system, wherein the first connection section 11 here has pointed ends 28 , being provided with seals, while the second connection section 12 has sleeves 29 , in which the pointed ends 28 of the conduits 23 - 26 and possibly 27 engage. This is evident for example from FIG. 3B .
- FIG. 3A and FIG. 3B show a first drill pipe 10 , which is connected to a second drill pipe 10 ′ by a flange connection 30 .
- the first connection section 11 of the first drill pipe 10 is connected to the second connection section 12 of the drill pipe 10 ′.
- the support section 13 and the support section 20 are in contact with each other.
- the bolts 21 are screwed in through the boreholes 14 into the threaded boreholes 31 . For this, the bolts 21 are inserted into the recesses 17 and inserted into the boreholes 14 of the support section 13 of the first connection section 11 .
- the drill pipes 10 , 10 ′ are arranged relative to each other such that the centering pins 19 can be inserted into the corresponding boreholes 18 .
- the pointed ends 28 of the conduits 23 - 27 should also correspond with the sleeves 29 of the conduits 23 - 26 and 27 .
- the drill pipes 10 , 10 ′ are shoved against each other, so that the pointed ends 28 lock in the sleeve 29 .
- the bolts 21 are introduced into the recesses 17 and shoved into the boreholes 14 .
- the bolts 21 are then screwed into the threaded boreholes 31 of the support section 20 of the second connection section 12 .
- the loosening of the drill pipe 11 ′ from the drill pipe 10 is then done by unscrewing the bolts 21 from the threaded boreholes 31 and removing the bolts 21 from the recesses 17 .
- the drill pipe 10 ′ may be removed from the drill string, the pointed ends 28 of the conduits 23 - 26 and 27 being separated from the sleeves 29 of the conduits 23 - 26 and 27 .
- FIG. 4A and FIG. 4B show a spatial view of a device 40 according to the invention for the moving of at least one drill pipe into a borehole or retracting it from this, especially during the near-surface creation of a borehole in a ground 100 from a starting point 101 to a target point 102 and/or when introducing a pipeline, underground line or underground cable 105 into the ground 101 from a starting point 101 to a target point 102 or vice versa.
- the press frame 40 comprises a base 41 , having a framelike superstructure. On the base 41 are provided rails 42 , on which guide elements 43 are provided, which can travel on the rails 42 . On the guide elements 43 is arranged the transmission element 44 .
- abutment 45 arranged on the abutment 45 .
- two actuators 46 designed here as a double-stroke cylinder 47
- One double-stroke cylinder 47 has two hydraulic cylinders 48 , which are joined together by a plate 49 .
- the cylinders 48 in the present instance are designed as telescopic cylinders.
- the plate 49 is likewise connected to a guide element 43 , so that the plate 49 can thereby travel on the rails 42 and is guided.
- the double-stroke cylinders 47 are designed so that in the fully extended state they can move the transmission element 44 substantially as far as the front end of the base 41 on the opposite side of the abutment 45 .
- end bearings 50 On the base 41 are provided end bearings 50 , on which a drill pipe 10 or some other element of the drill string can be set down.
- the end bearings 50 are vertically oriented when a drill pipe 10 is to be placed thereon.
- the supports 50 are folded down horizontally. (See FIG. 4B ).
- FIG. 5A to FIG. 5D show a drill pipe 10 , pointing with its second connection section 12 in the direction of the borehole.
- a starting seal (not shown) could also be provided here at the end of the base 41 facing toward the borehole.
- the first connection section 11 or its indentation 15 enters into positive-locking connection with an engaging element 53 of the transmission element 44 in that the engaging element 53 engages with the indentation in order to enable a movement of the drill pipe 10 .
- the transmission element 44 comprises a connection plate 51 , with which the double cylinders 47 engage.
- the transmission element 44 has an opening 52 , into which the drill pipe 10 is introduced.
- a positive-locking element is provided, which in the present instance has two engaging elements 53 .
- the engaging elements 53 are respectively connected to a hydraulic cylinder 54 , which are horizontally oriented.
- the engaging elements 53 are horizontally movable in relation to the transmission element 44 . The movement here occurs preferably by the hydraulic cylinder 54 .
- the engaging elements 53 can be moved from an open position ( FIG. 6A ) to a closed engagement position ( FIG. 6B ).
- the engaging elements 53 engage in the indentations 15 of the drill pipe 10 and thereby produce a positive-locking connection between the drill pipe 10 and the press frame 40 .
- the transmission element 44 can be moved along the rails 42 toward the borehole or away from it. Thanks to the positive-locking connection of the engaging elements 53 with the indentation 15 , both compressive and tensile forces may be applied, so that the drill pipe 10 can be moved out from the borehole or into it.
- the engaging elements 53 may also consist of multiple elements, which are moved spatially, or in the case of two engaging elements 53 a vertical movement is also possible as an alternative.
- connections 55 for the conduits 23 - 26 and 27 acting as quick connectors with the conduits 23 - 26 and 27 .
- the channel 27 it may be necessary to manually introduce hoses or lines into a new drill pipe being connected before the connection is made and to connect them to the hoses or lines of the previous drill pipe 10 ′ in the channel 27 . It is also possible to have as few connections as possible by making these lines or hoses longer than one drill pipe 10 .
- FIG. 7 shows a schematic representation of the system according to the invention in a spatial representation.
- a starting ditch 101 here is provided in the ground 100 , from which a borehole (not shown) is produced to a target ditch 102 .
- a press frame 40 In the starting ditch 101 there is provided a press frame 40 .
- the distance between a starting ditch 101 and a target ditch 102 can be up to 1500 m or more.
- FIG. 7 one can see how a drilling device 103 has arrived in the target ditch 102 .
- the drilling device 103 is then released from the drill string and removed from the target ditch 102 .
- On the first drill pipe 10 of the drill string is arranged an adapter 104 , which is connected to a protective pipe 105 being laid or, if that is not needed, directly to the underground line or the underground cable.
- the press frame 40 has been turned around so that the abutment 45 is located at the starting point of the borehole (not shown) and is braced here.
- the press frame 40 it is also possible for the press frame 40 to be designed so that the necessary forces are provided both in the extension direction of the hydraulic cylinder 48 and in the retraction direction of the hydraulic cylinder 48 so that the press frame does not have to be rotated.
- drill pipes 10 or also several already interconnected drill pipes are connected to the drill string and shoved into the ground 100 by the press frame 40 .
- the removal of the drill pipes 10 is done in that they are pulled out from the borehole by the press frame 40 .
- a drill pipe 10 Once a drill pipe 10 has been pulled out completely, it is separated and removed from the drill string, for example as described above.
- several drill pipes connected to form a drill string section may be dismounted.
- the protective pipe 105 or the underground line or the underground cable is introduced at the same time directly into the borehole in the ground 100 .
- a tensile-resistant plug-in sleeve connection 32 for the connecting of two drill pipes 10 , 10 ′ in a second embodiment is shown in FIG. 9 .
- the tensile-resistant plug-in sleeve connection 32 has a pointed end 33 and a sleeve 34 . These are shown connected in FIG. 9 .
- the pointed end 33 has a connection surface 35 and the sleeve 34 has a connection surface 36 .
- In the connection surface 35 there is provided at least one indentation 37 and in the connection surface 36 there is likewise provided at least one corresponding indentation 38 .
- connection surfaces 35 , 36 come into contact and the indentations 37 , 38 form a groove 39 .
- a shearing element 60 is inserted into the groove 39 to make the tensile-resistant connection.
- several grooves 39 and shearing elements 60 could be provided.
- Firmly arranged conduits/channels 23 - 27 may likewise be provided accordingly inside the drill pipes 10 , 10 ′ with tensile-resistant plug-in sleeve connection 32 .
- connection section 11 , 12 is supposed to be connected to the transmission element 44
- one alternative embodiment proposes in regard to the press frame 40 that either a pointed end 33 or a sleeve 34 is provided as the transmission element 44 or its engaging element 53 to make a tensile-resistant plug-in sleeve connection 32 .
- FIGS. 10 to 12 show a schematic representation of another embodiment of the system according to the invention in a side view.
- a starting ditch 101 ′ has been provided in the ground 100 ′, from which a borehole 102 ′ is produced in the microtunneling method from a starting point to a target point (not shown).
- a scaffolding 104 ′ optionally acting as an expansion of the starting ditch 101 ′ and in which the components of the system according to the invention are provided.
- an advancing unit 103 ′ such as a pipe thruster or a press frame 40 , with which a drill string 110 is pressed or shoved into the borehole 102 ′.
- a drilling device 106 At the front end 105 ′ of the drill string 110 there is provided a drilling device 106 , with which the borehole 102 ′ is created.
- the drilling device 106 is supplied via supply lines 108 with power and drill suspension for carrying away the loosened drill cuttings.
- the supply lines 108 are provided outside the starting ditch 101 ′, for example on a drum (not shown), and are unwound from the drum, bundled together (position 109 ) and introduced into the borehole as the borehole makes progress.
- the drill string here consists of drill pipes 10 ′′ in a third embodiment, which are represented in FIGS. 20 to 23 .
- the drill pipe 10 ′′ shown here as an example consists of 2 shell elements 11 ′, 12 ′, which are preferably identical in design here. It is of course possible to use more than two shell elements 11 ′, 12 ′, if this should prove to be advantageous.
- connection flange 15 ′ At its front end 13 ′ and at its rear end 14 ′ the drill pipe 10 ′′ has a connection flange 15 ′.
- indentations 17 ′ are made in a wall 16 ′ of the shell element 11 ′, 12 ′.
- boreholes 18 ′ are provided, into which connection bolts 20 ′ may be inserted. These are screwed together with nuts 19 ′.
- a non-positive locking connection is produced between the individual drill pipes 10 ′′.
- an indentation 21 ′ provided in the flange 15 ′ in the area of the boreholes 18 ′ a seal (not shown) may be introduced.
- the connection of the drill pipes 10 ′′ may be positive-locking via engaging elements (not shown). An integral bonded connection is also possible, however then an easy releasing of the drill pipes from each other after the removal is not easily possible.
- an indentation 22 ′ is provided in the wall 16 ′, acting as a point of application of the forces for advancing or pulling back the drill string 110 via the advancing unit 103 ′.
- indentations 23 ′ are provided in the wall 16 ′, being bounded on one side by a web 24 .
- Boreholes 25 ′′ are provided in the indentations 23 ′ and the web 24 ′.
- This likewise involves a flange-like connection possibility for the shell elements 11 ′, 12 ′, which are arranged one on the other.
- Bolts 26 ′ can likewise be installed here, and are screwed together with nuts 27 ′. In this way, an axial connecting of the shell elements 11 ′, 12 ′ occurs along a connection line 28 ′.
- an indentation 29 ′ is provided in the web 24 ′, in which likewise a seal (not shown) may be inserted.
- boreholes 30 ′ and positioning pins 31 ′ are arranged at or on the web 24 ′ or the front or rear end 13 ′, 14 ′ of the drill pipe 10 ′′, which engage with each other when correctly positioned.
- the drill pipes 10 ′′ are respectively arranged for example with a 90 degree offset from each other, as is shown in FIG. 21, 22 .
- the assembling of the drill pipes 10 ′′ and the following connection of the drill pipes 10 ′′ to each other to form the drill string 110 takes place in a mounting device 400 .
- This comprises, as shown in FIGS. 13 to 19 , a stand 410 in which a feed area 430 and a mounting area 420 are provided.
- the supply lines 108 run through the mounting area 420 .
- the feed area 430 comprises an outer area 440 and an inner area 450 .
- a drill pipe 10 ′′ which is composed of two shell elements 11 ′, 12 ′ assembled but not yet locked in place is arranged on a carriage 460 , which can travel on guide elements 470 from the outer area 440 to the inner area. This position is represented in FIG. 13 .
- the mounting device 400 here comprises for example two manipulating elements 500 , 510 .
- the upper manipulating element 500 and the lower manipulating element 510 are each arranged on the frame 410 and able to travel vertically.
- the upper manipulating element 500 has gripping elements 520 , which grasp the upper shell element 12 .
- the lower manipulating element 510 comprises a support 530 , on which the lower shell element 11 ′ is placed.
- the upper manipulating element 500 has been lowered onto the upper shell element 12 ′ and the grippers 520 are in engagement.
- the lower manipulating element 510 has been raised so that the drill pipe 10 ′′ emerges from the carriage 460 , so that the latter can travel back to the outer area 440 .
- the upper manipulating element 500 together with the upper shell element 12 ′ are raised and the lower manipulating element 510 is lowered ( FIG. 15 ).
- the two manipulating elements 500 , 510 travel from the feed area 430 to the mounting area 420 and are moved so that the shell elements 11 ′, 12 ′ are again sitting on one another. ( FIG. 16 ).
- the shell elements 11 ′, 12 ′ of the drill pipe 10 ′′ are locked in place and then joined together.
- the drill pipe 10 ′′ is then rotated if necessary, moved toward the borehole 102 ′ against the drill string 110 and connected to the latter. All components of the device 400 then release the drill pipe 10 ′′, and the drill string 110 is pressed by the advancing unit 103 ′ into the borehole 102 ′.
Abstract
Description
- The invention relates to a drill pipe for use during the creation of a borehole in a ground from a starting point to a target point along a predetermined drill line, in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is gradually created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced. Furthermore, the invention relates to a device for moving at least one drill pipe into a borehole or out from it, especially during the near-surface creation of a borehole in a ground from a starting point to a target point and/or when placing a pipeline or underground line or an underground cable in the ground from a starting point to a target point or vice versa, with at least one base, with at least one abutment, with at least one actuator for moving the at least one drill pipe, being operatively connected to the base, with a transmission element, being operatively connected to the actuator, for transmitting the movement produced by the at least one actuator to the at least one drill pipe, as well as a system and a method for the creation of a borehole in the ground from a starting point to a target point along a predetermined drill line, in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is gradually created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced.
- When erecting a power supply grid, for example when creating a 380 kV line, besides the creation of overhead power lines it is also necessary to lay these lines in the ground.
- The open ditch method is used during a near-surface laying of underground cables, underground lines and also conduits (such as pipelines). This sometimes causes substantial operations along the route and involves an expense which should not be underestimated for ditch excavation and refilling. For example, in the construction of a 380 kV cable route there are needed two ditch profiles, each with 5.5 m width and 2.15 m depth. The separation of the individual soil layers has proven to be especially complicated, requiring several separate clamps. This is necessary in order to restore the soil quality to the original state during the later refilling of the ditch. Furthermore, a construction service area of around 40 m must be kept open during the construction work, while after completion of the construction work a cable protection zone of around 23 m must be kept accessible. These operations during the construction phase and the impact after completion of the work in the context of open laying of cable justify the need to develop a suitable underground laying method.
- Furthermore, in order to limit the intrusions into nature during the construction phase and keep down the construction costs, it is necessary to achieve large reach lengths. Reach lengths of up to 1500 m or more are desirable here. The problem with near-surface laying is the slight coverage of the line and sometimes also the slight distance between the individual boreholes (both of which may be only 2 to 6 m). The diameter of the lines being laid here is in a range of less than 500 mm, often also less than 300 mm.
- Ditch-less drilling methods are already available from pipeline construction. (microtunneling, HDD), but heretofore it has not been possible to easily satisfy the necessary parameters with these methods.
- Thus, drilling methods already exist which can lay the desired diameter range, but for technical reasons these methods are limited to much shorter laying lengths, especially due to the supplying of drill fluid. For example, the microtunnel drilling technique is up to 300 mm. For a reach length of up to or more than 1.5 km, it has still been necessary to resort to a microtunnel drilling technique with a diameter of around 1000 mm. However, with increasing diameter the space required for the construction zone layout and the costs increase significantly. Therefore, so far this technique has not been economically feasible. Moreover, the pipelines of the microtunnel drilling technique are only plugged together, so that only compressive but no tensile forces can be transmitted.
- With the Horizontal Directional Drilling (HDD) method, a laying would be conceivable in regard to the requirements for the diameter and the reach length. This method is already being used in particular for crossing under rivers and roads. In this method, a pilot borehole is first made, using a rotating drill head and drill string, from the starting point in the direction of a target point. The position accuracy is ensured by a measurement system, which is arranged behind the drill head. The removed material is delivered to the surface with a bentonite suspension. The bentonite suspension is pumped through the drill string directly to the nozzles arranged at the drill head. The suspension mixes with the loosened soil and flows back through the annular space between drill string and ground to the starting point. However, large flushing pressures are needed for a clean removal of the loosened ground. But in order to prevent an unwanted emergence of the flushing on the surface, in the HDD method as well laying depths and thus coverages of more than 30 m are required. The drill pipes of the pilot drill string are coupled together by a non-positive locking connection by the drill pipes being screwed together directly by a screw thread connection. This also provides the connection to the drive unit of the so-called HDD rig. The screwing together of the drill string elements accordingly requires set-up time.
- Thanks to developments in the field of drilling and pumping techniques in regard to the supplying of the drilling device with driving and flushing fluid, it has become possible to overcome the 1000 mm diameter barrier for the use of microtunneling methods, for example. However, the successive installing of drill pipes is a problem in regard to the regular extending of the supply lines for the drilling device and the transporting away of the drill cuttings. This involves significant loss of performance due to set-up times for laying lengths of up to or more than 1500 m.
- Furthermore, in regard to the laying of near-surface lines it is necessary, after or during the producing of the borehole, to introduce a pipeline into the ground, especially one made advantageously of plastic (other materials such as polymer concrete, glass fiber plastic or the like are also possible) in order to then lay the conduit inside it. The problem here is that it is not easily possible to create the borehole directly with the introducing of plastic pipes in the ground, since the plastic pipe especially in the case of long laying lengths is not suited to transmitting the necessary forces without damage. It is therefore necessary to use drill pipes which are suited to providing the necessary forces required for the drilling. Here, once more, the above-described problem of successive inserting occurs.
- After reaching the target point, the drilling device is removed. Furthermore, the drill pipes laid are removed once more and the plastic pipe is placed in the ground at the same time or after a delay. It is necessary to transmit tensile forces onto and across the drill pipes and accordingly once a drill pipe has been removed from the borehole it must be separated from the drill string in order to use it again.
- The problem of the invention is therefore to overcome the aforementioned drawbacks, especially to reduce the set-up times and to make possible the transmitting of tensile forces in the drill string.
- This problem is solved with respect to a first solution by a drill pipe in a first embodiment in that the drill pipe has at each of its ends at least one connection section for detachably connecting it to a further element of a drill string in a tensile-resistant manner, in that the drill pipe has at least one element for producing a tensile-resistant connection to a corresponding element of an advancing device for advancing the drill pipe into and/or retracting it from the borehole, and in that an outer wall of the drill pipe is made in one piece.
- Surprisingly, it has been found that a tensile-resistant drill string can be produced with such a drill pipe in a simple manner, one which is designed to be advanced and/or retracted.
- Another solution of the problem with regard to the drill pipe in a second embodiment proposes that the drill pipe has at each of its ends at least one connection section for detachably connecting it to a further element of a drill string in a tensile-resistant manner, that the drill pipe has at least one element for producing a tensile-resistant connection to a corresponding element of an advancing device for advancing the drill pipe into and/or retracting it from the borehole, and that the drill pipe consists of at least two shell elements which are axially connectable to the drill pipe.
- By dividing the drill pipe into shell elements it is possible to lay the supply lines of the drilling device, coupled together as a hose pack, in a lower portion of the shell elements and to close them with the other shell elements as a kind of lid. The supply lines may therefore be provided, for example, wound up on a drum over the full drilling length. Fragmenting of the supply lines during microtunneling is reduced or eliminated, which significantly decreases the set-up times.
- Another teaching of the invention proposes that at least one connection region of a shell element is provided with at least one seal. In this way, pressure tightness of the drill pipe can be provided in a simple fashion.
- Another teaching of the invention proposes that the connection by the respective connection sections of the drill pipe to another element of the drill string occurs in the form of a positive-locking and/or non-positive-locking connection. Another teaching of the invention proposes that the drill pipe has at its first end a first connection section and at its opposite second end a second connection section corresponding to the first connection section.
- It is advantageous that the first connection section and the second corresponding connection section in the mounted state form a flange connection, having connection elements and/or boreholes for the placement of a bolt connection. In this way, a tensile-resistant connection between the drill pipes can be provided in a simple and economical manner.
- Alternatively, it is advantageous that the first connection section and the second corresponding connection section form a tensile-resistant plug-in sleeve connection, wherein one connection section has a pointed end and the other connection section is a corresponding sleeve, each of them having at least one corresponding indentation in the opposite surface, which form a groove in the assembled state in which at least one shearing element can be inserted to produce the tensile-resistant supporting connection. Here as well it is possible in a simple manner to produce a tensile-resistant connection between the drill pipes. Surprisingly, it has been found that such a connection can also be used for drill pipes.
- Another teaching of the invention proposes that the element for producing a tensile-resistant connection with the corresponding element of the advancing device is an indentation in the outer wall of the drill pipe. In this way, it is possible in an easy manner to enable a movement of the drill pipe via a movement device, such as a press frame for example, in a tensile-resistant manner and with substantially less set-up time.
- Another teaching of the invention proposes that the indentation can be provided with a covering. This is advantageous for avoiding stones and the like from getting jammed in the indentation in the ground.
- Another teaching of the invention proposes that the element for producing a tensile-resistant connection with the corresponding element of the advancing device is an element of a tensile-resistant plug-in sleeve connection. In this way, it is possible in an easy manner to enable a movement of the drill pipe via a movement device, such as a press frame for example, in a tensile-resistant manner and with substantially less set-up time.
- Another teaching of the invention proposes that the drill pipe has at least one conduit section arranged in the outer wall and/or in the inner space of the drill pipe at the outer wall and extending in parallel along the outer wall, wherein the at least one conduit section has at each of its ends a connection element for producing a connection between conduit sections of interconnected drill pipes or elements of the drill string. The conduits serve for example for the transport of bentonite, as a driving line for the driving of a pump, as a feed line for transporting away the drill cuttings, for bringing in electrical lines, as a high-pressure conduit or as a delivery line for the mixture of washing liquid and drill cuttings/loosened soil. The conduits have, for example, a plug-in sleeve system, possibly with gaskets, so that the conduits can be plugged into one another. In this way, the set-up times for providing the supply lines can be substantially reduced.
- Advantageously, the drill pipes according to the invention have a length of more than 8 m. This likewise significantly reduces the set-up times.
- Another teaching of the invention proposes that the drill pipe has at least one indentation in its wall for producing a connection with an advancing device for advancing the drill pipe into and/or retracting it from the borehole. A positive locking can be implemented in this way for easier transmitting of advancing forces to the outer surface.
- Another teaching of the invention proposes that at least one manipulating element has an element for producing a connection with a shell element, for example in the form of a gripping element, which preferably engages in an indentation in the surface of the shell element, a magnetic element, or a suction or vacuum element. In this way, a supporting connection can easily be provided for the lifting of the shell element.
- A further solution of the invention proposes in regard to the movement device that a guide element is provided which is movable relative to the base and operatively connected to the transmission element, that the transmission element has at least one positive-locking element for the transmission of the motion, being designed such that a tensile-resistant releasable connection exists between transmission element and drill pipe.
- In this way it is easily possible to transmit tensile forces to the drill string on a drill string consisting of drill pipes, especially as previously described, among others.
- Another teaching of the invention proposes that the at least one actuator is a hydraulic cylinder and/or a rack and pinion drive. Advantageously, they are simple actuators which are maintenance-free and able to provide the required forces.
- Another teaching of the invention proposes that the positive-locking element has at least one engaging element which provides the tensile-resistant releasable connection by engaging with an engaging section of the drill pipe, preferably on its outer wall. Advantageously, the at least one engaging element is designed so that it encloses the drill pipe, wherein preferably the positive-locking element has at least two engaging elements, which are especially preferably arranged horizontally and/or vertically movable in the positive-locking element. In this way, a releasable connection for the force transmission which has low set-up time can be provided in an easy manner. In particular, the set-up time can be reduced significantly by a horizontal/vertical moving of the engaging elements.
- Another teaching of the invention proposes that the at least one engaging element is a connection section corresponding to a connection section of the drill pipe. Advantageously, the connection sections form a tensile-resistant plug-in sleeve connection, wherein the engaging element has either a pointed end or a sleeve corresponding to the pointed end, each of them having at least one corresponding indentation in the opposite surfaces, which form a groove in the assembled state in which at least one shearing element can be inserted to produce the tensile-resistant supporting connection. In this way, a releasable connection for the force transmission which has low set-up time can be provided in an easy manner. In particular the set-up time can be reduced significantly by inserting and removing the at least one shearing element.
- Another teaching of the invention proposes that a starting seal is provided, preferably in connection with the base.
- Another solution of the invention proposes a device for the mounting of a drill pipe as described above for use during the creation of a borehole in the ground from a starting point to a target point along a predetermined drill line, in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is gradually created by means of a drilling device that has a drilling tool for loosening the ground when the drill pipes are advanced, with a feed area for the shell elements, with a mounting area for connecting the shell elements, with manipulating elements for receiving, moving and positioning the shell elements in the mounting area, with at least one advancing element and/or at least one rotating element for the positioning of the shell elements in the mounting area.
- Another teaching of the invention proposes that the shell elements are positionable about a supply line of the drilling device.
- Another teaching of the invention proposes that has at least one manipulating element with a gripping element for producing a connection with a shell element, which preferably engages in an indentation in the surface of the shell element.
- Another teaching of the invention proposes that the manipulating elements are horizontally and vertically movable, so that the shell elements are movable from the feed area to the mounting area.
- Another solution of the invention proposes in regard to the system that the drill pipes are the drill pipes described above, and an advancing device as described above is provided for the moving of the drilling device by the advancing of the drill string.
- Advantageously, when using the two-piece drill pipes, a device as described above is provided for the mounting of a drill pipe.
- Another teaching of the invention proposes that the drill pipes are arranged in the drill string such that the axial connection regions of the shell elements are arranged offset relative to each other.
- Another solution of the invention proposes in regard to the method that the previously described drill pipes are used, which are moved in the borehole, mounted on a drill string, by means of an advancing device as described above.
- Advantageously, when using the two-piece drill pipes, a device for the mounting of a drill pipe is used as described above.
- Another teaching of the invention proposes that the drill pipes are arranged in the drill string such that the axial connection regions of the shell elements are arranged offset relative to each other.
- The above-described solutions of the invention are not limited to the near-surface laying of pipelines, underground cables or underground lines in the ground. Instead, the aforementioned problem can likewise be employed in classical microtunneling with large diameters, for example with concrete pipes. Here as well, the solutions according to the invention can significantly reduce the set-up times and substantially eliminate lengthening the supply lines and installing advancing pipes in the drilling area with respect to installations and supply lines.
- Furthermore, the drill pipe may also be a product pipe at the same time, which as such remains in the ground and does not have to be removed again from the ground for the pulling in of the product pipe.
- The invention shall be explained more closely below with the aid of an exemplary embodiment in connection with a drawing. There are shown:
-
FIGS. 1A,1B side views of a first embodiment of a drill pipe according to the invention, -
FIG. 2A a first connection section of the drill pipe according to the invention, -
FIG. 2B a second connection section of the drill pipe according to the invention, -
FIG. 2C the connection section ofFIG. 2A without covering, -
FIG. 2D a side view ofFIG. 2C , -
FIG. 3A the connection section of two interconnected drill pipes according to the invention, -
FIG. 3B a side view ofFIG. 3A , -
FIG. 4A a spatial view of a first embodiment of a device according to the invention for moving a drill pipe in a first position, -
FIG. 4B a spatial view of the device according to the invention for moving a drill pipe in a second position, -
FIG. 5A a spatial view similar toFIG. 4A with the first embodiment of the drill pipe according to the invention, -
FIG. 5B a spatial view similar toFIG. 4B with the first embodiment of the drill pipe according to the invention -
FIG. 5C a top view ofFIG. 5A , -
FIG. 5D a top view ofFIG. 5B , -
FIG. 6A a side view of a first transmission element according to the invention of the first embodiment of the device according to the invention with engaging elements in a first position, -
FIG. 6B a similar view toFIG. 6A with engaging elements according to the invention in a second position, -
FIG. 7 a schematic representation of a first system according to the invention in spatial view after finishing the drilling process, -
FIG. 8 a schematic representation in spatial view at the start of the pulling in of the conduit, and -
FIG. 9 a cross sectional view of a second embodiment according to the invention of two interconnected drill pipes according to the invention in a second embodiment. -
FIG. 10 a schematic representation of a second embodiment of the system according to the invention in side view, -
FIG. 11 a top view ofFIG. 10 , -
FIG. 12 a spatial view ofFIG. 10 , -
FIGS. 13 to 19 a schematic representation of an embodiment of a mounting device according to the invention with the individual mounting steps, -
FIG. 20 a spatial schematic representation of a third embodiment of a drill pipe according to the invention, -
FIG. 21 a spatial schematic representation of two connected drill pipes for this, -
FIG. 22 a side view ofFIG. 21 , and -
FIG. 23 a spatial schematic representation of a shell element. -
FIGS. 1A, 1B show in side view a first embodiment of adrill pipe 10 according to the invention. Thedrill pipe 10 has at its first end afirst connection section 11 and at its opposite second end asecond connection section 12, wherein thefirst connection section 11 corresponds to thesecond connection section 12 inasmuch as these may be joined together or inserted into one another. Thefirst connection section 11 and thesecond connection section 12 are provided such that they form a flange connection in a first embodiment of the invention, wherein thefirst connection section 11 has asupport section 13, in whichboreholes 14 are provided. Behind thesupport section 13 is provided anindentation 15 in theouter wall 16 of thedrill pipe 10. (SeeFIG. 2A to 2D ). Corresponding to theboreholes 14, recesses 17 are provided in theindentation 15. Furthermore,boreholes 18 are provided in thesupport section 13, being designed such that centering pins 19, provided on thesecond connection section 12, can engage in them. - The
second connection section 12 likewise has asupport element 20, on which eitherbolts 21 are firmly arranged, or in whichboreholes 31 are provided, containing a thread in whichloose bolts 21 are screwed into therecesses 17 through theboreholes 14 into the threadedboreholes 31 in thesupport section 20. - The
indentation 15 may be closed with acovering 22. The covering 22 is fastened in theindentation 15 for example by means of screws. The covering serves to prevent any objects from gathering in theindentation 15 or in therecesses 17 while thedrill pipe 10 is moving in the borehole. - Inside the
drill pipe 10 are firmly arranged several conduits. These include adelivery line 23 for taking away loosened soil or drill cuttings in connection with drill flushing/drilling/bentonite suspension, apressing line 24, with which for example a bentonite suspension is introduced to penetrate as a lubricating agent between drill pipes and borehole wall, a drivingline 25, with which for example driving fluid is transported to the drilling device in order to drive a jet pump optionally present there (not shown), afeed line 26 with which for example a bentonite suspension is transported to the drill head, with which the drill cuttings or the loosened dirt is then transported out from the borehole and the working face in front of the drilling tool is supported, and achannel 27, in which are provided for example high-pressure lines for the spray system of the cutting tools or power lines for the power supply for the drilling device. - The conduits are connected by a plug-in sleeve system, wherein the
first connection section 11 here has pointed ends 28, being provided with seals, while thesecond connection section 12 hassleeves 29, in which the pointed ends 28 of the conduits 23-26 and possibly 27 engage. This is evident for example fromFIG. 3B . -
FIG. 3A andFIG. 3B show afirst drill pipe 10, which is connected to asecond drill pipe 10′ by aflange connection 30. Thefirst connection section 11 of thefirst drill pipe 10 is connected to thesecond connection section 12 of thedrill pipe 10′. Thesupport section 13 and thesupport section 20 are in contact with each other. Thebolts 21 are screwed in through theboreholes 14 into the threadedboreholes 31. For this, thebolts 21 are inserted into therecesses 17 and inserted into theboreholes 14 of thesupport section 13 of thefirst connection section 11. - For the connecting of the
first connection section 11 to thesecond connection section 12, thedrill pipes boreholes 18. In this case, the pointed ends 28 of the conduits 23-27 should also correspond with thesleeves 29 of the conduits 23-26 and 27. After this, thedrill pipes sleeve 29. Then thebolts 21 are introduced into therecesses 17 and shoved into theboreholes 14. Thebolts 21 are then screwed into the threadedboreholes 31 of thesupport section 20 of thesecond connection section 12. - The loosening of the
drill pipe 11′ from thedrill pipe 10 is then done by unscrewing thebolts 21 from the threadedboreholes 31 and removing thebolts 21 from therecesses 17. After this, thedrill pipe 10′ may be removed from the drill string, the pointed ends 28 of the conduits 23-26 and 27 being separated from thesleeves 29 of the conduits 23-26 and 27. -
FIG. 4A andFIG. 4B show a spatial view of adevice 40 according to the invention for the moving of at least one drill pipe into a borehole or retracting it from this, especially during the near-surface creation of a borehole in aground 100 from astarting point 101 to atarget point 102 and/or when introducing a pipeline, underground line orunderground cable 105 into theground 101 from astarting point 101 to atarget point 102 or vice versa. This shall be called apress frame 40 in the following. Thepress frame 40 comprises abase 41, having a framelike superstructure. On thebase 41 are providedrails 42, on which guideelements 43 are provided, which can travel on therails 42. On theguide elements 43 is arranged thetransmission element 44. - Directly or operatively connected to the
base 41 is anabutment 45 arranged on theabutment 45. In this way, twoactuators 46, designed here as a double-stroke cylinder 47, are connected. One double-stroke cylinder 47 has twohydraulic cylinders 48, which are joined together by aplate 49. Thecylinders 48 in the present instance are designed as telescopic cylinders. Theplate 49 is likewise connected to aguide element 43, so that theplate 49 can thereby travel on therails 42 and is guided. The double-stroke cylinders 47 are designed so that in the fully extended state they can move thetransmission element 44 substantially as far as the front end of the base 41 on the opposite side of theabutment 45. - On the
base 41 are providedend bearings 50, on which adrill pipe 10 or some other element of the drill string can be set down. Theend bearings 50 are vertically oriented when adrill pipe 10 is to be placed thereon. During the movement of thetransmission element 44 in relation to thebase 41, thesupports 50 are folded down horizontally. (SeeFIG. 4B ). -
FIG. 5A toFIG. 5D show adrill pipe 10, pointing with itssecond connection section 12 in the direction of the borehole. A starting seal (not shown) could also be provided here at the end of the base 41 facing toward the borehole. Thefirst connection section 11 or itsindentation 15 enters into positive-locking connection with an engagingelement 53 of thetransmission element 44 in that the engagingelement 53 engages with the indentation in order to enable a movement of thedrill pipe 10. - The
transmission element 44 comprises aconnection plate 51, with which thedouble cylinders 47 engage. Thetransmission element 44 has anopening 52, into which thedrill pipe 10 is introduced. Furthermore, a positive-locking element is provided, which in the present instance has twoengaging elements 53. Theengaging elements 53 are respectively connected to ahydraulic cylinder 54, which are horizontally oriented. Theengaging elements 53 are horizontally movable in relation to thetransmission element 44. The movement here occurs preferably by thehydraulic cylinder 54. Theengaging elements 53 can be moved from an open position (FIG. 6A ) to a closed engagement position (FIG. 6B ). In the engagement position shown here, theengaging elements 53 engage in theindentations 15 of thedrill pipe 10 and thereby produce a positive-locking connection between thedrill pipe 10 and thepress frame 40. Through theactuators 46, thetransmission element 44 can be moved along therails 42 toward the borehole or away from it. Thanks to the positive-locking connection of theengaging elements 53 with theindentation 15, both compressive and tensile forces may be applied, so that thedrill pipe 10 can be moved out from the borehole or into it. Alternatively, theengaging elements 53 may also consist of multiple elements, which are moved spatially, or in the case of two engaging elements 53 a vertical movement is also possible as an alternative. - On the back side of the
transmission element 44 there are provided connections 55 for the conduits 23-26 and 27, acting as quick connectors with the conduits 23-26 and 27. In regard to thechannel 27 it may be necessary to manually introduce hoses or lines into a new drill pipe being connected before the connection is made and to connect them to the hoses or lines of theprevious drill pipe 10′ in thechannel 27. It is also possible to have as few connections as possible by making these lines or hoses longer than onedrill pipe 10. -
FIG. 7 shows a schematic representation of the system according to the invention in a spatial representation. A startingditch 101 here is provided in theground 100, from which a borehole (not shown) is produced to atarget ditch 102. In the startingditch 101 there is provided apress frame 40. The distance between a startingditch 101 and atarget ditch 102 can be up to 1500 m or more. InFIG. 7 one can see how adrilling device 103 has arrived in thetarget ditch 102. Thedrilling device 103 is then released from the drill string and removed from thetarget ditch 102. On thefirst drill pipe 10 of the drill string is arranged anadapter 104, which is connected to aprotective pipe 105 being laid or, if that is not needed, directly to the underground line or the underground cable. In the starting ditch in this embodiment thepress frame 40 has been turned around so that theabutment 45 is located at the starting point of the borehole (not shown) and is braced here. Alternatively, it is also possible for thepress frame 40 to be designed so that the necessary forces are provided both in the extension direction of thehydraulic cylinder 48 and in the retraction direction of thehydraulic cylinder 48 so that the press frame does not have to be rotated. - When creating the borehole,
individual drill pipes 10 or also several already interconnected drill pipes are connected to the drill string and shoved into theground 100 by thepress frame 40. The removal of thedrill pipes 10 is done in that they are pulled out from the borehole by thepress frame 40. Once adrill pipe 10 has been pulled out completely, it is separated and removed from the drill string, for example as described above. Alternatively, several drill pipes connected to form a drill string section may be dismounted. During the pulling out of the drill pipes, theprotective pipe 105 or the underground line or the underground cable is introduced at the same time directly into the borehole in theground 100. - Alternatively to the
flange connection 30, a tensile-resistant plug-insleeve connection 32 for the connecting of twodrill pipes FIG. 9 . The tensile-resistant plug-insleeve connection 32 has apointed end 33 and asleeve 34. These are shown connected inFIG. 9 . Thepointed end 33 has aconnection surface 35 and thesleeve 34 has aconnection surface 36. In theconnection surface 35 there is provided at least oneindentation 37 and in theconnection surface 36 there is likewise provided at least one correspondingindentation 38. If thepointed end 33 is shoved into thesleeve 34, the connection surfaces 35, 36 come into contact and theindentations groove 39. Ashearing element 60 is inserted into thegroove 39 to make the tensile-resistant connection. Alternatively,several grooves 39 andshearing elements 60 could be provided. In addition, it is possible if required to provide at least oneseal 61 between the connection surfaces 35, 36. Firmly arranged conduits/channels 23-27 may likewise be provided accordingly inside thedrill pipes sleeve connection 32. - Depending on which
connection section transmission element 44, one alternative embodiment proposes in regard to thepress frame 40 that either apointed end 33 or asleeve 34 is provided as thetransmission element 44 or its engagingelement 53 to make a tensile-resistant plug-insleeve connection 32. -
FIGS. 10 to 12 show a schematic representation of another embodiment of the system according to the invention in a side view. A startingditch 101′ has been provided in theground 100′, from which a borehole 102′ is produced in the microtunneling method from a starting point to a target point (not shown). In the starting ditch is provided ascaffolding 104′, optionally acting as an expansion of the startingditch 101′ and in which the components of the system according to the invention are provided. - In the starting
ditch 101′ there is arranged an advancingunit 103′, such as a pipe thruster or apress frame 40, with which adrill string 110 is pressed or shoved into the borehole 102′. At thefront end 105′ of thedrill string 110 there is provided adrilling device 106, with which the borehole 102′ is created. Thedrilling device 106 is supplied viasupply lines 108 with power and drill suspension for carrying away the loosened drill cuttings. Thesupply lines 108 are provided outside the startingditch 101′, for example on a drum (not shown), and are unwound from the drum, bundled together (position 109) and introduced into the borehole as the borehole makes progress. - The drill string here consists of
drill pipes 10″ in a third embodiment, which are represented inFIGS. 20 to 23 . - The
drill pipe 10″ shown here as an example consists of 2shell elements 11′, 12′, which are preferably identical in design here. It is of course possible to use more than twoshell elements 11′, 12′, if this should prove to be advantageous. - At its
front end 13′ and at itsrear end 14′ thedrill pipe 10″ has aconnection flange 15′. For this, indentations 17′ are made in awall 16′ of theshell element 11′, 12′. Corresponding to theindentations 17′,boreholes 18′ are provided, into whichconnection bolts 20′ may be inserted. These are screwed together withnuts 19′. In this way, a non-positive locking connection is produced between theindividual drill pipes 10″. In anindentation 21′ provided in theflange 15′ in the area of theboreholes 18′ a seal (not shown) may be introduced. Alternatively, the connection of thedrill pipes 10″ may be positive-locking via engaging elements (not shown). An integral bonded connection is also possible, however then an easy releasing of the drill pipes from each other after the removal is not easily possible. - Furthermore, an
indentation 22′ is provided in thewall 16′, acting as a point of application of the forces for advancing or pulling back thedrill string 110 via the advancingunit 103′. - Furthermore,
indentations 23′ are provided in thewall 16′, being bounded on one side by aweb 24.Boreholes 25″ are provided in theindentations 23′ and theweb 24′. This likewise involves a flange-like connection possibility for theshell elements 11′, 12′, which are arranged one on the other.Bolts 26′ can likewise be installed here, and are screwed together withnuts 27′. In this way, an axial connecting of theshell elements 11′, 12′ occurs along aconnection line 28′. Furthermore, anindentation 29′ is provided in theweb 24′, in which likewise a seal (not shown) may be inserted. - In order to make possible a better positioning of the
drill pipes 10″ relative to each other and that of theshell elements 11′, 12′ relative to each other,boreholes 30′ and positioning pins 31′ are arranged at or on theweb 24′ or the front orrear end 13′, 14′ of thedrill pipe 10″, which engage with each other when correctly positioned. - In order to accomplish a better stability of the
drill string 110, thedrill pipes 10″ are respectively arranged for example with a 90 degree offset from each other, as is shown inFIG. 21, 22 . - The assembling of the
drill pipes 10″ and the following connection of thedrill pipes 10″ to each other to form thedrill string 110 takes place in a mountingdevice 400. This comprises, as shown inFIGS. 13 to 19 , astand 410 in which afeed area 430 and a mountingarea 420 are provided. Thesupply lines 108 run through the mountingarea 420. - The
feed area 430 comprises anouter area 440 and aninner area 450. In theouter area 440, as is shown here as an example, adrill pipe 10″ which is composed of twoshell elements 11′, 12′ assembled but not yet locked in place is arranged on acarriage 460, which can travel onguide elements 470 from theouter area 440 to the inner area. This position is represented inFIG. 13 . - The mounting
device 400 here comprises for example two manipulatingelements element 500 and the lower manipulatingelement 510 are each arranged on theframe 410 and able to travel vertically. The upper manipulatingelement 500 hasgripping elements 520, which grasp theupper shell element 12. The lower manipulatingelement 510 comprises asupport 530, on which thelower shell element 11′ is placed. - In
FIG. 14 , the upper manipulatingelement 500 has been lowered onto theupper shell element 12′ and thegrippers 520 are in engagement. At the same time, the lower manipulatingelement 510 has been raised so that thedrill pipe 10″ emerges from thecarriage 460, so that the latter can travel back to theouter area 440. Next, the upper manipulatingelement 500 together with theupper shell element 12′ are raised and the lower manipulatingelement 510 is lowered (FIG. 15 ). After this, the two manipulatingelements feed area 430 to the mountingarea 420 and are moved so that theshell elements 11′, 12′ are again sitting on one another. (FIG. 16 ). Theshell elements 11′, 12′ of thedrill pipe 10″ are locked in place and then joined together. Thedrill pipe 10″ is then rotated if necessary, moved toward the borehole 102′ against thedrill string 110 and connected to the latter. All components of thedevice 400 then release thedrill pipe 10″, and thedrill string 110 is pressed by the advancingunit 103′ into the borehole 102′. -
List of reference symbols 10, 10′, 10″ Drill pipe 11 First connection section 11′ Shell element 12 Second connection section 12′ Shell element 13 Support section 13′ Front end 14 Borehole 14′ Rear end 15 Indentation 15′ Connection flange 16 Outer wall 16′ Wall 17 Recess 17′ Indentation 18, 18′ Borehole 19 Centering pin 19′ Nut 20 Support section 20′ Connection bolt 21 Bolt 21′ Indentation 22 Covering 22′ Indentation 23 Delivery line 23′ Indentation 24 Pressing line 24′ Web 25 Driving line 25′ Borehole 26 Feed line 26′ Bolt 27 Channel 27′ Nut 28 Pointed end 28′ Connection line 29 Sleeve 29′ Indentation 30 Flange connection 30′ Borehole 31 Threaded borehole 31′ Positioning pins 32 Tensile-resistant plug-in sleeve connection 33 Pointed end 34 Sleeve 35 Connection surface 36 Connection surface 37 Indentation 38 Indentation 39 Groove 40 Device/press frame 41 Base 42 Rail 43 Guide element 44 Transmission element 45 Abutment 46 Actuator 47 Double-stroke cylinder 48 Cylinder 49 Plate 50 End bearing 51 Connection plate 52 Opening 53 Engaging element 54 Hydraulic cylinder 55 Connection 60 Shearing element 100, 100′ Ground 101, 101′ Starting ditch 102 Target ditch 102′ Boring/borehole 103 Drilling device 103′ Advancing unit 104 Adapter 104′ Scaffolding 105 Protective pipe/underground cable/underground line 105′ Front end 106 Drilling device 108 Supply lines 109 Position 110 Drill string 400 Mounting device 410 Stand/frame 420 Mounting area 430 Feed area 440 Outer area 450 Inner area
Claims (12)
Priority Applications (1)
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US16/913,209 US20200325735A1 (en) | 2018-09-21 | 2020-06-26 | Drill pipe, and system and method for laying a pipeline |
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US201816087284A | 2018-09-21 | 2018-09-21 | |
US16/913,209 US20200325735A1 (en) | 2018-09-21 | 2020-06-26 | Drill pipe, and system and method for laying a pipeline |
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US201816087284A Continuation | 2018-09-21 | 2018-09-21 |
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US16/913,209 Abandoned US20200325735A1 (en) | 2018-09-21 | 2020-06-26 | Drill pipe, and system and method for laying a pipeline |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4204426A (en) * | 1978-11-13 | 1980-05-27 | Westbay Instruments Ltd. | Measuring casing coupler apparatus |
-
2020
- 2020-06-26 US US16/913,209 patent/US20200325735A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4204426A (en) * | 1978-11-13 | 1980-05-27 | Westbay Instruments Ltd. | Measuring casing coupler apparatus |
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