EP2615239B1 - Dispositif et procédé de forage de puits dans un sol constitué de roche, d'argile et/ou de matériaux connexes - Google Patents

Dispositif et procédé de forage de puits dans un sol constitué de roche, d'argile et/ou de matériaux connexes Download PDF

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Publication number
EP2615239B1
EP2615239B1 EP13150026.6A EP13150026A EP2615239B1 EP 2615239 B1 EP2615239 B1 EP 2615239B1 EP 13150026 A EP13150026 A EP 13150026A EP 2615239 B1 EP2615239 B1 EP 2615239B1
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EP
European Patent Office
Prior art keywords
borehole casing
ground
drilling
drill string
borehole
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EP13150026.6A
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German (de)
English (en)
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EP2615239A1 (fr
Inventor
Luc VANDENBULCKE
Koen Vanderbeke
Dieter Rabaut
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Deme Offshore BE NV
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Geosea NV
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Application filed by Geosea NV filed Critical Geosea NV
Priority to PL13150026T priority Critical patent/PL2615239T3/pl
Publication of EP2615239A1 publication Critical patent/EP2615239A1/fr
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    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/18—Anchoring or feeding in the borehole
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
    • 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
    • E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives

Definitions

  • the present invention relates to a device and method for drilling shafts in a ground consisting of rock, clay and/or related materials.
  • rock, clay and/or related materials is understood to mean diverse types of ground which can form the ground layers of a water basin or a land area up to a very variable depth. Such ground layers for instance form part of sea arms, streams and rivers, docks, storage reservoirs, access channels to locks or inlet docks, and coastal sea areas. Rocky bottoms also fall within these types of ground. Drilling a shaft can for instance be necessary in order to arrange piles in the ground or to realize piles by filling the shaft with a binder during or after the drilling, and curing this binder.
  • Devices and methods for drilling shafts are for instance advantageous when arranging dolphins, mooring posts and/or piles of jetties (berthing) in hard bottoms.
  • Another suitable application comprises of arranging in underwater bottoms pile foundations on which jackets and/or monopiles for wind turbines can be placed.
  • a known method for the drilling cavities or shafts in ground layers consisting of rock, clay and/or related materials comprises of arranging a borehole casing in the ground, lowering into the borehole casing a drill string built up of segments and provided with a drill head with cutting tools, then setting the drill string into rotation in the borehole casing so that ground material is dislodged by the cutting action of the cutting tools, and discharging the dislodged ground material.
  • the drill string is lengthened in the known method by adding segments thereto. For this purpose the drill string has to be moved in its entirety above ground level and optionally rotated to a horizontal position. Following lengthening the drill string is once again arranged in the borehole casing and set into rotation, wherein a greater depth can be reached.
  • the known method has the drawback, among others, that much time is lost in lengthening the drill string. This is detrimental to the drilling efficiency, this being understood to mean that the quantity of ground material drilled out per unit of time and power can be further increased.
  • the invention has for its object to provide a method and device for drilling shafts in a ground consisting of rock, clay and/or related materials which at least partially obviate the above stated and other drawbacks.
  • the invention provides for this purpose a device for drilling shafts according to claim 1.
  • the drilling efficiency is increased markedly relative to the known method, among other reasons because the drill head can be carried deeper into the ground without a time-consuming extension of the drill string by arranging additional drill string segments being necessary for this purpose.
  • the drilling means lowerable into the borehole casing comprises the means necessary for setting the drill string (and cutting tools) into rotation.
  • a further advantage of the invention is that the working safety is also increased; people are after all no longer present in the vicinity of rotating parts or at great heights, as is the case in the known method.
  • An embodiment of the device according to the invention comprises means for maintaining a water column in the borehole casing, which water column maintains a flow in the hollow drill string for the purpose of discharging the dislodged ground material.
  • the water column which is arranged in the borehole casing, and which otherwise extends into the space between the borehole casing and the drilling means lowered into the borehole casing and disposed substantially coaxially with the borehole casing, provides for a pressure difference between the upper side of the discharge means for dislodged ground material connected to the drill string and the underside of the drill string, wherein the pressure is of course higher on the underside.
  • a flow is hereby maintained in the hollow drill string, and thus also in the discharge means connected to the drill string, in which flow the dislodged ground material is discharged to the upper side of the discharge means, which comprise for instance a discharge hose connected to the upper side of the drill string.
  • the borehole casing is preferably arranged in a manner such that it admits substantially no water on its underside.
  • the borehole casing is generally placed for this purpose on or in the (underwater) bottom, so creating a good seal and water sealing at the lower outer end of the borehole casing. If the water sealing is insufficient, use can also be made of a (dredge) pump to discharge dislodged ground material.
  • the borehole casing has somewhat greater transverse dimensions than the drilling means.
  • the borehole casing preferably takes a cylindrical form, wherein a preferably also substantially cylindrical drilling means can be lowered into the borehole casing in a direction corresponding to the longitudinal direction of the borehole casing.
  • the invention provides a device comprising translation means for displacing the drill head over a determined stroke length in the longitudinal direction of the borehole casing, wherein the drilling means is in secured state.
  • the drilling means more particularly comprises translation means for moving the drill head out of the borehole casing or retracting it into the borehole casing over a determined stroke length.
  • the stroke length can be selected by the skilled person depending on conditions, or is adjustable.
  • the translation means are adapted to provide for a stroke length such that the drill head can extend deeper than a lower edge of the borehole casing.
  • This embodiment makes it possible to displace the drill head through a determined stroke length in the longitudinal direction of the borehole casing, wherein the drilling means is in secured state, whereby the drill head can reach a greater depth without it being necessary to release the secured state of the drilling means.
  • the drill head can extend deeper here than the lower edge of the borehole casing.
  • the stroke length of the drill head is limited to 2 metres, and more preferably to 1.5 metres.
  • Such a relatively limited stroke length makes it possible to likewise limit the dimensions of the drilling means in the longitudinal direction of the borehole casing to 10 metres, more preferably to 5 metres, and most preferably to 3 metres.
  • An embodiment of the invention provides translation means in the form of jacks slidable into each other and/or hydraulic cylinders.
  • underreaming In underreaming the drill string is provided on the drill head outer end with a construction having radially fold-out side arms. When drilling is carried out with the arms in the folded-out position a borehole will be created which is wider than the diameter drilled by the drill head. The ground directly beneath the borehole casing is hereby drilled away and the borehole casing can be moved even deeper into the ground. Underreaming is also applied when a wider foot must be drilled in order to obtain extra pile bearing capacity or anchoring.
  • the drilling means can be secured at the desired depth in the borehole casing using any securing means suitable for the purpose.
  • a preferred embodiment according to the invention provides a device wherein the securing means comprise wedge-like peripheral parts which run in the longitudinal direction of the borehole casing and co-act such that a relative translation of the peripheral parts in the longitudinal direction provides for a radial clamping force between the drilling means and the borehole casing. It has been found that such a manner of fixing the drilling means relative to the borehole casing produces a clamping force which is sufficiently great to be able to absorb and transmit the forces occurring during the drilling to the borehole casing. The clamping force ensures here that movement of the drilling means in the longitudinal direction of the borehole casing and perpendicularly thereof (in the peripheral direction of the borehole casing) is substantially prevented.
  • the securing means comprise, preferably hydraulic, jacks for the relative translation of the wedge-like peripheral parts in the longitudinal direction of the borehole casing.
  • the flexible suspension of the drilling means can comprise any suitable means, such as for instance a cable, it is advantageous in respect of simplicity to characterize the device according to the invention in that the flexible suspension of the drilling means comprises the discharge means for dislodged ground material connected to the hollow drill string.
  • the device comprises means with which the borehole casing can be arranged in the ground.
  • a device is provided wherein the means for arranging the borehole casing in the ground comprise an oscillator. It is advantageous to provide the device on a lifting platform anchored in the vicinity of the shafts to be formed, although this is not essential according to the invention.
  • such a lifting platform comprises an adjustable outboard frame (an 'outrigger') provided with the means for arranging the borehole casing in the ground, such as preferably an oscillator.
  • the means for arranging the borehole casing in the ground are preferably adapted to arrange the borehole casing in the ground at an angle to the vertical direction other than zero. This can for instance be achieved by connecting the oscillator to the frame for pivoting around a substantially horizontal axis so that the oscillator can be tilted at an angle to the horizontal direction other than zero.
  • the vertical direction designates the direction running substantially perpendicularly of the water surface.
  • the horizontal direction designates the direction running substantially parallel to the water surface.
  • a further embodiment of the device according to the invention comprises a drill head connected to feed lines and provided with substantially radially outward directed nozzles and adapted to inject a first fluid into the ground at the position of the drill head under a first pressure of at least 200 bar, more preferably at least 350 bar, and most preferably at least 500 bar.
  • the nozzles can be positioned such that they inject the first fluid substantially radially outward into ground layers situated at a greater depth than the lower outer end of the borehole casing. It has been found that this preferred embodiment renders the use of an underreaming construction unnecessary, whereby the borehole casing can be moved in relatively simple manner to a greater depth. The drilling efficiency is moreover further increased.
  • the radially outward directed first fluid jets do indeed ensure that the ground is at least partially removed or weakened at the position of the underside of the borehole casing, so that the borehole casing can move deeper into the ground.
  • An additional advantage hereof is that less deep drilling is necessary in order to achieve the same shaft depth.
  • the first fluid can comprise any injectable substance, although particularly suitable is water to which additives, such as for instance abrasives and other abrading means, are added if desired.
  • Yet another embodiment of the invented device also comprises means connected to feed lines and adapted to inject a second fluid into the hollow drill string of the drilling means at the position of the drill head under a second pressure of a maximum of 50 bar, more preferably a maximum of 30 bar, and most preferably a maximum of 20 bar.
  • the second fluid preferably has a lower density than water, whereby this second fluid rises and expands in the drill string (and the discharge means connected thereto), whereby the upward flow is further supported.
  • a particularly suitable second fluid comprises air.
  • a drilling means is then lowered by means of a flexible suspension into the borehole casing to a position in the vicinity of the underside of the borehole casing.
  • the drilling means comprises a hollow drill string provided with a drill head with cutting tools, and means for setting the drill string into rotation, and is secured in the borehole casing at said position.
  • the securing means comprise wedge-like peripheral parts which run in the longitudinal direction of the borehole casing and co-act such that a relative translation of the peripheral parts in the longitudinal direction provides for a radial clamping force between the drilling means and the borehole casing, wherein the wedge-like peripheral parts are translated until a radial clamping force between the drilling means and the borehole casing is obtained which is sufficient to substantially secure the drilling means both in the longitudinal direction of the borehole casing and in the rotation direction of the drill head.
  • the drill string (and so also the drill head) is then set into rotation in the borehole casing so that ground material is dislodged by the cutting action of the cutting tools.
  • the ground material can here be a soil plug formed in the borehole casing as well as ground material lying deeper than the underside of the borehole casing.
  • the dislodged ground material is discharged via discharge means, for instance in the form of a flexible discharge hose, connected to the hollow drill string.
  • a preferred method comprises of arranging in the borehole casing a water column which maintains a flow in the hollow drill string and with which the dislodged ground material is discharged, as already described above.
  • an embodiment of a method is provided wherein a second fluid is injected into the hollow drill string of the drilling means at the position of the drill head under a second pressure of a maximum of 50 bar, more preferably a maximum of 30 bar, and most preferably a maximum of 20 bar, whereby the flow for the purpose of upward discharge of the dislodged ground material is supported.
  • the second fluid preferably has a lower density than water, and more preferably comprises air.
  • an embodiment of the method is applied wherein the borehole casing is moved to a second depth greater than the first depth, the drill head is moved deeper into the borehole casing and the drill string is rotated so that ground material is dislodged by the cutting action of the cutting tools and discharged via the discharge means connected to the hollow drill string.
  • a method is provided in a preferred embodiment wherein a first fluid is injected substantially radially outward into the ground at the position of the drill head under a first pressure of at least 200 bar, more preferably at least 350 bar, and most preferably at least 500 bar.
  • the first fluid preferably comprises water.
  • a device 1 for drilling a shaft 2 in a ground layer 3.
  • Ground layer 3 preferably comprises rock, but may also comprise clay and/or related materials.
  • the ground layer 3 may be covered with a top layer 3a (also referred to as overburden), which generally comprises somewhat more loosely packed stone.
  • Device 1 comprises a borehole casing 4 which can be arranged over at least part of its length in ground 3 by means of for instance pile-driving, oscillation or vibration. In the situation shown in figure 1 borehole casing 4 has been driven into overburden 3a.
  • the diameter of borehole casing 4 can in principle be chosen within wide limits, but preferably amounts to at least 1 m, more preferably at least 2 m, still more preferably at least 4 m and most preferably at least 6 m. Because borehole casing 4 supports on its underside on a ground layer 3, a substantially water-impermeable sealing is achieved, though this may depend to some extent on the properties of ground layer 3 and is not therefore essential to the invention.
  • borehole casing 4 comprises a thick-walled steel tube which is suitable for withstanding the forces exerted during insertion of borehole casing 4 into ground layer 3 and the drilling.
  • Borehole casing 4 is sufficiently large to provide space for a drilling means 10, which can be lowered by means of a flexible suspension in the form of cable 26 (see figure 7 ) into borehole casing 4 to a position at a height of the underside of borehole casing 4.
  • Drilling means 10 comprises a hollow drill string 5 which is provided on the side facing toward the ground 3 with a drill head 7 with cutting tools 8.
  • Drill string 5 is received in a housing 9 (in figure 4 the housing is cut-away and therefore not visible), the peripheral surface of which is provided with securing means with which drilling means 10 can be secured in borehole casing 4.
  • the securing means comprise four wedge-like peripheral parts (11, 12) distributed evenly over peripheral surface 9 and running in longitudinal direction 20 of borehole casing 4.
  • Peripheral parts 11 are fixedly connected to the peripheral surface of housing 9 and have a thickness increasing in upward direction.
  • Peripheral parts 12 are connected for translation in longitudinal direction 20 to the peripheral surface of housing 9 and have a thickness increasing in downward direction.
  • jacks 110 connected to the fixed peripheral parts 11 (see figure 2 ) the movable peripheral parts 12 can be translated in longitudinal direction 20 relative to the fixed peripheral parts 11, this from a position as shown in figure 2 , in which they lie in a lowermost position, to a position as shown in figure 3 in which they lie in an uppermost position.
  • the movable peripheral parts 12 co-act in their upper position with the fixed peripheral parts 11 such that a clamping force is created in radial direction 21 between drilling means 10 and the borehole casing 4.
  • the developed clamping force substantially prevents a movement of drilling means 10 in longitudinal direction 20, radial direction 21 and peripheral direction 22.
  • drill string 5 is provided in the shown embodiment with a weighting collar 15 which simultaneously serves as stop.
  • the height position 17 of collar 15 relative to upper part 16 of drilling means 10 in the uppermost position of drill head 7 therefore defines the maximum stroke length of drill head 7.
  • Drilling means 10 is further provided with means in the form of a rotary motor 13 for setting drill string 5 (and so also drill head 7) into rotation and translation, and with discharge means for dislodged ground material 21 in the form of a flexible hose 14 connected to the hollow drill string 5.
  • the means for setting drill string 5 into translation in longitudinal direction 20 of borehole casing 4 comprise four jacks 109 which are slidable into each other and connect the upper part of the housing of rotary motor 13 to a web plate 111 of weighting collar 15.
  • the hollow drill string 5 and the flexible hose together form a central cavity 6 through which dislodged ground material 21 can be discharged.
  • the translating of drill string 5 by motor 13 takes place in longitudinal direction 20 of borehole casing 4 so that drill head 7 can hereby be moved out of or retracted into borehole casing 4.
  • the means for setting drill string 5 into rotation and translation preferably comprise a transmission in the form of a swivel provided with motor 13.
  • the transmission is designed such that it can transfer a fluid flow through cavity 6 from the stationary part (discharge hose 14) to the rotating part (drill shaft 5) of the device.
  • the transmission is further suitable for transmitting the necessary torque from the stationary to the rotating part of the device and for discharging the water-ground material mixture 3.
  • the transmission is further suitable for retaining these properties under the influence of the vibrations which inevitably occur during the drilling.
  • borehole casing 4 and drill string 5 run substantially vertically in the shown figures, they can be adjusted to any angle to the vertical direction other than zero, for instance from a jack-up platform or pontoon (see figures 7 and 8 ) or from the shore when the device forms part of for instance a vehicle.
  • device 1 is also provided with means (not shown) for maintaining a water column in borehole casing 4, for instance in the form of a pump with sufficient rise height and flow rate (typically for instance 1000 m 3 /h) so as to maintain the highest possible water level in borehole casing 4.
  • the water column provides for a pressure difference between the upper side of flexible discharge hose 14 at the position of the water level and the underside of drill string 5 at the position of cutting tools 8, wherein the pressure is of course higher on the underside. Owing to this pressure difference and because borehole casing 5 is open on the underside, so that a throughfeed is possible to cavity 6, water and dislodged ground material 21 flow into cavity 6.
  • a preferred variant also comprises means for injecting air under a second pressure into the hollow drill string 5 at the position of drill head 7.
  • These means comprise feed lines which are arranged on drill string 5 and which are connected at the one outer end to a compressor and which debouch at the other outer end into cavity 6 of drill string 5 via air inlet valves.
  • the compressor ensures that air is carried under a certain pressure through the lines and enters the upward flow in cavity 6. Because the compressed air has a lower density than the water flowing in cavity 6, the air rises as bubbles in drill string 5, whereby the upward flow is supported. The drilling efficiency is hereby increased.
  • Drill head 7 of device 1 according to the invention can further be provided with nozzles directed outward in radial direction 21 for injecting a first fluid, preferably water, under a first pressure into ground layers 3 at the position of drill head 7.
  • the device is provided for this purpose with feed lines (not shown) for feeding the first fluid to the nozzles.
  • the lines are connected to pressure means such as a pump or compressor for bringing the first fluid under pressure.
  • the nozzles are preferably mounted on drill head 7 so that they co-rotate with the drill head, although mounting on for instance the peripheral surface of housing 9 of drilling means 10 is likewise possible.
  • Nozzles 25 are preferably suitable for injecting the water under a first pressure of at least 200 bar, more preferably at least 350 bar, still more preferably at least 500 bar and most preferably at least 650 bar. Because the nozzles are directed substantially radially outward, the water jets are injected into ground layer 3 at a greater depth than the lower outer end of borehole casing 4. Extra ground material is hereby removed or at least weakened at the position of the underside of borehole casing 4, whereby borehole casing 4 can move deeper into the ground 3.
  • the feed lines for the first and second fluid can be long, particularly in the case of drilling at great depth. These lines are preferably carried substantially without bends from the upper side of device 1 to the lower part of drill string 5 and/or drill head 7. Pressure losses are hereby prevented as far as possible.
  • a lifting platform 30 is shown which is provided with a device 1 according to the invention.
  • a device 1 is particularly suitable for arranging pile foundations, on which jackets and/or monopiles for wind turbines can be placed, in underwater bottoms.
  • the shown lifting platform 30 is anchored in the underwater bottom by means of spud piles 31 and can be further provided with a crane 32 and, if desired, other auxiliary means.
  • Lifting platform 30 further comprises an outrigger 33.
  • Outrigger 33 is provided with means for arranging borehole casing 4 in ground 3, which means comprise in the shown embodiment an oscillator 34 which, if desired, is adapted to arrange borehole casing 4 in the ground at an angle 35 to the vertical direction 40 other than zero, as shown in figure 8 .
  • Frame 33 also allows positioning of borehole casing 4 within the required tolerance.
  • a number of steps are shown of an embodiment of the method according to the invention.
  • the jacks (109, 110) are not shown in the figures for the sake of clarity.
  • a borehole casing 4 is first driven into ground 3 to a first depth, which corresponds for instance to the depth of overburden 3a (see figure 5A ).
  • the borehole casing preferably admits substantially no water on its underside.
  • the depth to which borehole casing 4 can be carried into ground 3 typically depends on the chosen arranging technique and on the properties of the ground at this depth.
  • ground 3 is preferably a hard layer such as rock, limestone, hard clay or highly compacted sand.
  • Overburden 3a usually comprises more easily penetrable soil such as for instance weathered rock, clay, peat, loosely compacted sand.
  • drilling means 10 suspended from a flexible cable 26 is then lowered by means of crane 32 into borehole casing 4 from the position shown in figure 1 to a position as shown in figure 5A , in which the underside of drill head 7 lies at the level of the underside of borehole casing 4. In order to reach this level it may be necessary to have drill head 7 rotate in order to crush a ground material plug formed in borehole casing 4 and discharge it via the hollow drill shaft 5 and discharge line 14.
  • drilling means 10 is secured in borehole casing 4 by relative translation of the peripheral parts 11, 12, as already described above.
  • Drill string 5 is then set into rotation in borehole casing 4 with rotary motor 13 so that ground material 3 is dislodged by the cutting action of cutting tools 8, wherein drill head 7 moves in the longitudinal direction 20 of borehole casing 4 into ground 3 to a depth at which collar 15 makes contact with upper part 16 of drilling means 10 ( figure 5B ).
  • the loosened ground material 3 is discharged during drilling via the flexible discharge hose 14 connected to the hollow drill string 5, if desired using a water column arranged in borehole casing 4 and by introducing air into discharge cavity 6, this as described in more detail above.
  • Drill head 7 is subsequently retracted by rotary motor 13 to a position in which the underside of drill head 7 lies slightly above the level of the underside of borehole casing 4 ( figure 5C ), for instance over a distance roughly equal to the thickness of overburden 3a. At this moment a shaft 2 has been created with a depth corresponding to the stroke length 17 of collar 15.
  • borehole casing 4 is then moved to a second depth greater than the first depth as shown in figure 6A using oscillator 34 on platform 30 or using another suitable pile-driving means. Lowering of borehole casing 4 into ground 3 is facilitated here by the presence of shaft 2. As shown in figures 6B and 6C , drill head 7 is then moved deeper into borehole casing 4 and drill string 5 is rotated so that further ground material 3 is dislodged by the cutting action of cutting tools 8 and discharged via the discharge hose 14 connected to the hollow drill string 5.
  • drilling means 10 In order to reach the desired depth it may be necessary to uncouple drilling means 10 from borehole casing 4 by deactivating the securing means 11, 12, lowering drilling means 10 into borehole casing 4 to the desired height, and subsequently securing drilling means 10 once again by activating the securing means 11, 12 as described in more detail above.
  • Drill head 7 is then once again retracted into borehole casing 4 by rotary motor 13 to a position in which the underside of drill head 7 lies slightly above the level of the underside of borehole casing 4, after which borehole casing 4 is driven together with drill head 7 further into the ground to a greater depth as shown in figure 6D .
  • the above described sequence can then be repeated any number of times until the desired depth of shaft 2 has been reached.
  • drilling means 10 is released from borehole casing 4 by deactivating the securing means, and the drilling means is raised by means of crane 32.
  • the invented device and method are particularly suitable for drilling shafts of relatively large diameters in composite grounds so as to enable forming and/or arranging of foundation piles therein, wherein any desired depth can be reached without the drilling having to be interrupted at any time for assembly purposes.

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  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
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Claims (18)

  1. Dispositif (1) de forage de puits (2) dans un sol (3) consistant en roche, en argile et/ou en matériaux connexes, comprenant un tubage (4) de trou de forage et des moyens pour agencer le tubage (4) de trou de forage dans le sol (3), et un moyen de forage (10) que l'on peut faire descendre dans le tubage (4) de trou de forage au moyen d'une suspension flexible, étant entendu que le moyen de forage (10) comprend une garniture de forage creuse (5), reçue dans un logement (9), et pourvue d'une tête de forage (7) dotée d'outils de coupe (8) et de moyens (13) pour mettre la garniture de forage (5) en rotation, et étant entendu que le moyen de forage (10) est par ailleurs pourvu de moyens de fixation avec lesquels le moyen de forage (10) peut être fixé dans le tubage de trou de forage à la fois dans une direction longitudinale du tubage de trou de forage et perpendiculairement à celui-ci contre une paroi interne du tubage de trou de forage, les moyens de fixation étant prévus sur la surface périphérique du logement, étant entendu que le dispositif est par ailleurs pourvu de moyens d'évacuation du matériau (21) détaché du sol reliés à la garniture de forage creuse et de moyens de translation (109) pour déplacer la tête de forage (7) sur une longueur de course déterminée dans la direction longitudinale du tubage (4) de trou de forage, étant entendu que le moyen de forage (10) est à l'état fixé et étant entendu que les moyens (13) de mise en rotation de la garniture de forage et les moyens de translation (109) sont positionnés au-dessus des moyens de fixation.
  2. Dispositif selon la revendication 1, étant entendu que les moyens de fixation comprennent des pièces périphériques en forme de coin (11, 12) qui courent dans la direction longitudinale (20) du tubage de trou de forage et coopèrent de telle sorte qu'une translation relative des pièces périphériques (11, 12) dans la direction longitudinale (20) fournit une force de serrage radiale entre le moyen de forage (10) et le tubage (4) de trou de forage.
  3. Dispositif selon la revendication 1, étant entendu que les moyens de translation (109) sont adaptés en vue de fournir une longueur de course telle que la tête de forage (7) puisse se déplacer plus profondément qu'un bord inférieur du tubage (4) de trou de forage.
  4. Dispositif selon l'une quelconque des revendications précédentes, étant entendu que les moyens de translation consistent en vérins pouvant coulisser les uns dans les autres et/ou en cylindres hydrauliques.
  5. Dispositif selon l'une quelconque des revendications précédentes, comprenant par ailleurs des moyens servant à maintenir une colonne d'eau (11) dans le tubage (4) de trou de forage, laquelle colonne d'eau maintient un écoulement dans la garniture de forage creuse (5) dans le but d'évacuer le matériau (21) détaché du sol.
  6. Dispositif selon l'une quelconque des revendications précédentes, étant entendu que les moyens de fixation comprennent des vérins pour la translation relative des pièces périphériques en forme de coin (11, 12) dans la direction longitudinale (20) du tubage (4) de trou de forage.
  7. Dispositif selon l'une quelconque des revendications précédentes, étant entendu que la suspension flexible (26) du moyen de forage (10) comprend les moyens d'évacuation (14) du matériau (21) détaché du sol reliés à la garniture de forage creuse (5).
  8. Dispositif selon l'une quelconque des revendications précédentes, étant entendu que les moyens d'agencement du tubage (4) de trou de forage dans le sol (3) comprennent un oscillateur (34).
  9. Dispositif selon l'une quelconque des revendications précédentes, étant entendu que la tête de forage (7) est pourvue de duses qui sont reliées à des conduites d'alimentation et dirigées sensiblement vers l'extérieur dans le plan radial, et qui sont adaptées en vue d'injecter un premier fluide dans le sol (3) à l'emplacement de la tête de forage (7) à une première pression d'au moins 200 bars, de manière plus préférée, d'au moins 350 bars et, de manière particulièrement préférée, d'au moins 500 bars.
  10. Dispositif selon l'une quelconque des revendications précédentes, étant entendu que le dispositif comprend des moyens reliés à des lignes d'alimentation et adaptés en vue d'injecter un deuxième fluide dans la garniture de forage creuse (5) du moyen de forage (10) à l'emplacement de la tête de forage (7) à une deuxième pression d'au maximum 50 bars, de manière plus préférée, d'au maximum 30 bars et, de manière particulièrement préférée, d'au maximum 20 bars.
  11. Plate-forme de levage pourvue d'un dispositif selon l'une quelconque des revendications 1-10.
  12. Plate-forme de levage selon la revendication 11, comprenant un cadre hors bord réglable (porte-à-faux) pourvu des moyens d'agencement du tubage (4) de trou de forage dans le sol (3).
  13. Plate-forme de levage selon la revendication 11 ou 12, étant entendu que les moyens d'agencement du tubage (4) de trou de forage dans le sol (3) sont adaptés en vue d'agencer le tubage de trou de forage dans le sol selon un angle par rapport à la verticale différent de zéro.
  14. Procédé de forage de puits (2) dans un sol (3) consistant en roche, en argile et/ou en matériaux connexes, consistant à réaliser un dispositif selon l'une quelconque des revendications précédentes, à agencer le tubage (4) de trou de forage dans le sol (3) à une première profondeur, ce de telle sorte qu'il ne laisse sensiblement pas passer d'eau par sa face inférieure, à faire descendre le moyen de forage (10) dans le tubage (4) de trou de forage au moyen d'une suspension flexible, à fixer le moyen de forage (10) dans le tubage de trou de forage à la fois dans une direction longitudinale du tubage de trou de forage et perpendiculairement à celui-ci contre une paroi interne du tubage de trou de forage, puis à mettre la garniture de forage (5) en rotation dans le tubage (4) de trou de forage de sorte que du matériau (21) du sol soit détaché par l'action de coupe des outils de coupe (8), à déplacer le tubage (4) de trou de forage jusqu'à une deuxième profondeur plus grande que la première profondeur, à déplacer la tête de forage (7) sur une longueur de course prédéterminée jusqu'à une profondeur plus grande dans le tubage (4) de trou de forage au moyen des moyens de translation (109), étant entendu que le moyen de forage (10) est à l'état fixé, à faire tourner la garniture de forage de sorte que du matériau (21) du sol soit détaché par l'action de coupe des outils de coupe (8) et à évacuer le matériau (21) détaché du sol par l'intermédiaire de moyens d'évacuation reliés à la garniture de forage creuse (5).
  15. Procédé selon la revendication 14, étant entendu que les moyens de fixation comprennent des pièces périphériques en forme de coin (11, 12) qui courent dans la direction longitudinale (20) du tubage de trou de forage, et que la fixation du moyen de forage (10) dans le tubage du trou de forage s'effectue par translation relative des pièces périphériques (11, 12) dans la direction longitudinale (20) du tubage (4) de trou de forage.
  16. Procédé selon la revendication 14 ou 15, étant entendu que la longueur de course est telle que la tête de forage (7) se déplace plus profondément qu'un bord inférieur du tubage (4) de trou de forage.
  17. Procédé selon la revendication 16, étant entendu que le tubage du trou de forage pénètre dans le sol à la suite d'un affaiblissement de la structure du sol en une position plus profonde que le bord inférieur du tubage de trou de forage.
  18. Procédé selon l'une quelconque des revendications 14-17, étant entendu qu'une plate-forme de levage est pourvue d'un porte-à-faux et étant entendu que le tubage (4) de trou de forage est agencé depuis le cadre jusque dans le sol selon un angle par rapport à la verticale différent de zéro.
EP13150026.6A 2012-01-02 2013-01-02 Dispositif et procédé de forage de puits dans un sol constitué de roche, d'argile et/ou de matériaux connexes Active EP2615239B1 (fr)

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PL13150026T PL2615239T3 (pl) 2012-01-02 2013-01-02 Urządzenie i sposób wiercenia szybów w gruncie składającym się ze skały, gliny i/albo podobnych materiałów

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BE2012/0003A BE1020365A4 (nl) 2012-01-02 2012-01-02 Inrichting en werkwijze voor het boren van schachten in een uit rots, klei en/of aanverwante materialen bestaande ondergrond.

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EP2615239B1 true EP2615239B1 (fr) 2019-10-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3862528A1 (fr) 2020-02-04 2021-08-11 BAUER Maschinen GmbH Appareil de forage d'un trou et procédé de production d'un trou
EP4286593A1 (fr) 2022-05-30 2023-12-06 BAUER Spezialtiefbau GmbH Dispositif d'excavation et procede de creation d'un trou
EP4350119A1 (fr) 2022-10-06 2024-04-10 BAUER Maschinen GmbH Dispositif de forage sous-marin et procédé de construction d'un tubage sous-marin

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BE1022222B1 (nl) * 2014-10-31 2016-03-02 D.E.C.O. Nv Ruiminrichting en werkwijze voor het ruimen van vulmateriaal in offshore structuren
DE102015105908B4 (de) 2015-04-17 2024-08-01 Bauer Maschinen Gmbh Bohrgerät zum Erstellen einer verrohrten Bohrung und Verfahren zum Betreiben eines Bohrgerätes
JP6770733B2 (ja) * 2016-06-24 2020-10-21 三和機材株式会社 掘削装置
CN109736699B (zh) * 2019-03-10 2024-06-28 东营华来智能科技有限公司 一种钻井增速动力夯机

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3862528A1 (fr) 2020-02-04 2021-08-11 BAUER Maschinen GmbH Appareil de forage d'un trou et procédé de production d'un trou
WO2021156049A1 (fr) 2020-02-04 2021-08-12 Bauer Maschinen Gmbh Foret de fond de trou et procédé pour créer un trou de forage
EP4286593A1 (fr) 2022-05-30 2023-12-06 BAUER Spezialtiefbau GmbH Dispositif d'excavation et procede de creation d'un trou
WO2023232393A1 (fr) 2022-05-30 2023-12-07 Bauer Spezialtiefbau Gmbh Machine de génie civil et procédé de formation d'un trou
EP4350119A1 (fr) 2022-10-06 2024-04-10 BAUER Maschinen GmbH Dispositif de forage sous-marin et procédé de construction d'un tubage sous-marin

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PL2615239T3 (pl) 2020-06-29
EP2615239A1 (fr) 2013-07-17
BE1020365A4 (nl) 2013-08-06
DK2615239T3 (da) 2020-02-10

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