EP3436664B1 - Une méthode et un système de forage de puits - Google Patents

Une méthode et un système de forage de puits Download PDF

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Publication number
EP3436664B1
EP3436664B1 EP17718486.8A EP17718486A EP3436664B1 EP 3436664 B1 EP3436664 B1 EP 3436664B1 EP 17718486 A EP17718486 A EP 17718486A EP 3436664 B1 EP3436664 B1 EP 3436664B1
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EP
European Patent Office
Prior art keywords
container
shaft
drilling
liquid
well
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EP17718486.8A
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German (de)
English (en)
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EP3436664A1 (fr
Inventor
Niko Kleuters
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Nk Trading And Engineering GmbH
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Nk Trading And Engineering GmbH
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Publication of EP3436664A1 publication Critical patent/EP3436664A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D1/00—Sinking shafts
    • E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
    • E21D1/06—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws with shaft-boring cutters

Definitions

  • the present invention relates to a drilling method with removal of overburden carried out by means of a liquid and to a shaft drilling system for carrying out such a drilling method.
  • a drilling unit is provided, which is arranged in a drill shaft to be drilled at a shaft end of the drill shaft and is designed to generate overburden essentially by drilling, by removing rock and soil. For example, the removal is carried out additionally by means of blasting or with another suitable technique for expanding or deepening a well.
  • the spoil generated is absorbed by means of liquid, such as water, and the resulting mixture is applied to a surface, i.e. H. into the area surrounding the well opening.
  • a surface i.e. H. into the area surrounding the well opening.
  • This is usually done using a pump system or an air lifting system.
  • Scraper systems or vacuum suction systems were also used occasionally.
  • This has the disadvantage that the pumping capacity of the pump system has to be high as the depth of the wells increases and there is also the risk that this pump system becomes blocked. Such a malfunction can only be remedied with great effort.
  • Such troubleshooting is particularly difficult if the shaft access is difficult due to a small shaft diameter of 3 m to 8 m. Scratching systems are subject to very high wear in abrasive mountain conditions and also require too much space.
  • Vacuum systems have a very high energy requirement and require a large-volume installation in the shaft, e.g. B. Dry separation. High waste heat values are generated, which in turn require large-volume cooling systems. With water inflow z. B. scratch and vacuum systems ineffective.
  • liquid is withdrawn from the surface of the mixture, which is then returned to the end of the shaft, since liquid is constantly required there to remove overburden.
  • shafts with a small diameter of 3 m to 8 m are expanded by removing the overburden through an existing pilot hole and / or shafts is removed, with all of the above-mentioned disadvantages.
  • the need for pilot drilling in order to be able to expand a well in the first place always meant additional work, time and therefore also expenditure of money. It means a lot of effort to make the logistics underground available for the removal of overburden.
  • Sinking shafts in the specified diameter range without a pilot hole is usually done in conventional blasting operations or with the help of the so-called "air lifting method". Both methods have very decisive disadvantages in terms of sinking speed, project duration, security and costs.
  • the drilled shaft is completely filled with liquid up to the shaft collar during the drilling work.
  • the sinking speeds are very low, especially in hard formations, and the directional accuracy is limited.
  • Additives have to be added to the liquid column in difficult, brittle formations in order to prevent the liquid from flowing out into the surrounding rock formation in an uncontrolled manner. This is often very time-consuming, expensive and inadequate to control.
  • the shaft wall lining can only be installed subsequently.
  • shafts are also sunk using the blasting method.
  • the corresponding disadvantages are well known. So the sinking speed decreases with increasing shaft depth. The formation of explosive cracks can impair the surrounding geological formations and there is an increased safety risk for personnel on the shaft floor.
  • the DE 36 09 111 A1 discloses a drilling method according to the preamble of claim 1. Also taking into account the ever tightening international safety regulations, there is therefore a need in mining in particular for a more efficient, safe drilling method and a shaft drilling system which can be used more efficiently. This object is achieved with respect to the drilling method with the features of claim 1 and with respect to the shaft drilling system with the features of claim 10. Advantageous embodiments are the subject of the dependent claims.
  • a drilling unit is arranged at a shaft end of a drilling shaft in a drilling method.
  • the well for example, has a minimum diameter of 3 m to 8 m, preferably 5 m.
  • overburden is generated by drilling removal by means of the drilling unit. Overburden can also be optionally created by means of explosions.
  • a container for the overburden is provided within the well, in particular it is suitable for receiving a mixture of overburden and liquid.
  • the overburden is transferred into the container by means of liquid, so that a mixture of overburden and liquid accumulates in the container.
  • a transfer system for example a pump system, is provided for this purpose.
  • Both the drilling unit and the container are arranged inside the drill shaft.
  • An arrangement within the drill shaft is understood to be an arrangement in which the container is located permanently or at least during the filling process in the volume through the hollow volume of the shaft.
  • the container is preferably arranged closer to the shaft end than to the drill shaft opening. For example, the distance between the drilling unit and the container is less than 10 m. This arrangement greatly reduces the necessary pumping capacity.
  • the overburden that accumulates in a bottom region of the shaft end after removal by the drilling unit is preferably watered, so that the mixture of overburden and water is formed as a liquid there.
  • the mixture of overburden and liquid is pumped from the end of the shaft (from the bottom of the shaft) into the container.
  • the container is flooded with the mixture, at least excess liquid overflowing from the container.
  • the overflowed liquid is preferably taken up by an overflow channel or an overflow arranged in or on the container.
  • the flooding is carried out by further transfer of spoil into the container by means of liquid loaded with spoil.
  • the heavier overburden at least partially settles on the bottom and the liquid floats on top.
  • Coarse overburden sinks faster in the container than, for example, fine-grained overburden.
  • By flooding the container i.e. by filling it to the maximum Filling level, also known as maximum capacity, excess liquid is displaced from the container and further overburden settles in the container. This reduces the amount of liquid in the residual mixture that remains in the container.
  • the amount of overburden in the container is increased by sedimentation, while the amount of liquid in the container is reduced. Furthermore, since the overburden does not have a homogeneous composition, but mostly has coarser and finer constituents, the loose bed of larger constituents of the overburden forms interspaces in which smaller constituents of the overburden can accumulate, so that overall a denser mixture is also achieved by the finer constituents can accumulate between the coarser constituents in the container.
  • the removal of the overburden takes a certain amount of time, which is given by the duration of the filling process. It can be said that the longer the filling process takes, the denser the mixture can become, since there is more time in which overburden can settle.
  • the duration of the filling process is determined by the transfer speed and the maximum capacity of the container. Ideally, these two sizes are matched to one another in order to achieve a good compromise between the effectiveness of the drilling process and the nature of the mixture.
  • the excess or overflowed liquid is returned to the end of the shaft (to the bottom of the shaft), in particular to the bottom area, in order to water overburden accumulating there.
  • the drilling method also includes the step of removing the residual mixture through the drilling shaft.
  • the excess liquid is first taken up by an overflow channel arranged in or on the container before it is returned.
  • the overflow channel is formed all around on the edge of the container.
  • the overflowed liquid is returned via a downpipe.
  • the downpipe runs along a shaft wall, in particular from a filling platform at the upper end of the drilling unit, inside along a machine-related shaft wall support device.
  • an overflow channel if present, opens into the downpipe.
  • the residual mixture (the liquid mixture pumped from the shaft bottom) is reloaded from the container into a separate (additional) delivery container, which is likewise arranged in the drilling shaft.
  • the container fulfills the function of a collecting container, in particular a stationary collecting container.
  • a residual mixture with a high proportion of overburden is first generated in the collection container by overflow and return of excess liquid.
  • the reloading takes place, for example, in that the collecting container is arranged above the conveying container and a ramp is formed in the bottom of the collecting container by opening a flap.
  • the residual mixture is conveyed from the collecting container into the conveying container via this ramp.
  • a further embodiment of the drilling method comprises unloading the mixture or emptying the production container outside the drilling shaft and transporting the production container back into the drilling shaft, in particular into a loading position for resuming the individual process steps.
  • This embodiment enables further overburden to be transferred into the collecting container by means of liquid, while the conveying container is carrying away the residual mixture.
  • the effectiveness of the removal of the Residual mix and thus the shaft sinking speed are increased considerably.
  • the drilling unit removes further overburden and that the drilling shaft is driven forward regardless of the conveying cycle of the container.
  • the removal of the overburden can be paused during all or only during individual process steps, for example in order to protect other equipment arranged in the shaft end.
  • the container itself is the transport container that can be transported through the drill shaft.
  • the conveying container can also be a further (additional) element, as described above in connection with the container designed as a stationary collecting container.
  • the method according to the invention comprises the step of removing the residual mixture through the drill shaft.
  • the residual mixture is removed in the conveying container.
  • the method further comprises the step of emptying the delivery container outside the well. This takes place, for example, in a collection bunker in which the spoil of the mixture can settle further. Liquid floating on top of it can then also be returned to the bottom of the shaft after preparation. Further measures for dewatering the mixture, for example screening processes, are conceivable.
  • the method also includes the step of returning the empty delivery container into the drill shaft.
  • the residual mixture can be transported away, for example, using a pull rope and a lifting system.
  • the lifting system is arranged outside the drill shaft and comprises a cable winch on which the traction cable is rolled up, as a result of which the delivery container is transported through the drill shaft.
  • Different designed lifting systems are also conceivable and within the meaning of the invention includes.
  • a lifting system in the sense of the invention is suitable for transporting the mixture, also referred to as the residual mixture, through the drill shaft, in particular in the delivery container.
  • the lifting system is preferably also suitable for returning the delivery container into the drill shaft.
  • the delivery container is preferably arranged surrounding a central long axis of the drill shaft. This arrangement is particularly suitable in wells with a rather small diameter of less than four meters ( ⁇ 4 m) and a correspondingly limited amount of space within the well. This minimizes and avoids the risk of contact between the container and the shaft wall. The volume capacity of the container is maximized.
  • the container can be designed and arranged in such a way that its center of gravity, in particular in the empty state and additionally also in the filled state with homogeneous filling, is not on the central long axis of the drill shaft. Due to its center of gravity located outside the shaft axis, the executives for transporting the container are minimized.
  • a central guide line and / or lifting line preferably runs along the central long axis of the drill shaft, which serves at least to lift the drilling unit and, for example, also as a supporting attachment for those devices which are provided for supplying the equipment arranged in the drill shaft, such as electrical lines and / or liquid supply lines and / or liquid discharge lines.
  • the supply lines etc. are preferably protected by covers attached to the guide strand. These covers are preferably designed so that they simultaneously serve as guide rails for the container during the conveying processes.
  • the container preferably has a recess which is designed such that the central guide strand can run therein.
  • the container has a recess extending in the longitudinal direction of the container from the container opening to the container bottom.
  • the recess is U-shaped in cross section.
  • the recess results in an effectively space-filling arrangement of the container around the central guide line. Furthermore, the provision of the recess ensures that the center of gravity is shifted compared to the not recessed container. It is thereby achieved that the container can be conveyed in a self-stabilizing manner along the guide strand on a pulling system, such as a pulling rope. The executives are thereby minimized and very advantageous higher conveying speeds can be achieved. This means that the center of gravity of the delivery container, especially when empty and also when filled with homogeneous filling, is not on the central long axis of the drill shaft, which makes pulling up on a pulling rope that runs offset to the central guide strand easier and corresponding enables higher conveyor speeds; the shaft sinking speed is increased accordingly.
  • the recess also enables the conveyor container to be emptied by tilting it relative to the central guide strand, without the conveyor container having to be completely detached from the guide strand.
  • Holding elements are preferably arranged on the conveying container, on which the conveying container is fastened in an articulated manner and thus tiltable about a pivot axis.
  • the drilling method according to the invention is particularly suitable for use in an essentially vertical drill shaft.
  • the upper cross-sectional opening of the container has a grid.
  • the grid is preferably arranged below the overflow.
  • the grid serves as a coarse filter and prevents the coarse drill material from getting out of the container in accordance with the mesh size.
  • the mesh size can preferably be changed according to the properties of the drilling material.
  • a corresponding opening is provided in the grid for the supply of the mixture of liquid and overburden.
  • the opening can alternatively also be formed in that the grille does not cover the entire cross-sectional opening of the container. This coarse filter cleans itself as soon as the supply of the mixture is interrupted or stopped.
  • the grid is designed such that at least individual grid ribs are designed to be elongated and protrude into the container. This makes the filling process turbulent Liquid mixture also calms down and the process of depositing the spoil is accelerated.
  • At least one working platform is provided within the well. From the work platform, personnel can carry out work within the well and do not have to enter the flooded floor area of the well.
  • the working platform is preferably arranged surrounding the central guide strand within the drill shaft. In this way, a maximum size of the work platform can be achieved with a correspondingly optimized workplace.
  • the supply of the staff with sufficient breathing air is ensured by an appropriate supply through the free inner cross section of the guide strand.
  • the platform is arranged to be movable along the central guide strand.
  • it is arranged below the container surrounding the central guide strand. It is particularly preferably held by the container.
  • the work platform is connected to the container via struts.
  • the container is both a conveying and a collecting container.
  • the work platform can also be arranged in the two-part embodiment of the container below the conveying container. If the container is moved along the central guide line, the work platform also moves.
  • the work platform is designed to transport and hold additional equipment within the well.
  • a further drilling unit is arranged on an underside of the work platform.
  • the work platform is therefore suitable for installing a shaft lining on the shaft wall from there.
  • the shaft lining is pre-assembled plates (so-called liner plates) that can be expanded into a cylindrical tube. The pre-assembled plates are transported from the surface around the central guide strand on the work platform into the drill shaft. There the shaft lining is expanded using a suitable tool and pressed against the shaft wall.
  • This system can also be automated without the need for personnel in the Wellbore.
  • the use of shaft wall support plates pre-assembled on the surface and their possible automated installation are only possible with the drilling system described, since no other disruptive supply lines of any kind are attached outside the central guide line.
  • a protective cover is preferably arranged between the work platform and the container in order to protect people and equipment located on the work platform.
  • the described drilling method is particularly suitable for sinking wells without the need for an existing well as a target underground.
  • Such a drilling method can also be called full shaft drilling or blind shaft drilling.
  • the shaft drilling system described enables an innovative drilling method with which particularly small solid shaft bores or blind shaft bores between approx. 3 m and 8 m in diameter can be drilled more efficiently, faster and safely for the personnel.
  • the system presents a simple separation and conveying of the drilling material.
  • the special arrangement of the drilling machine or drilling unit, the drilling material separation and the drilling material removal which is guided centrally in the shaft, enables effective shaft wall removal directly above the drilling machine / drilling unit.
  • the shaft wall is permanently actively supported until it is stabilized by appropriate expansion.
  • the special arrangement of the innovative assemblies even with the smaller drilling diameters, provides enough space to temporarily install the drilling device in the shaft above the drilling machine, to carry out exploratory drilling or anchoring and consolidation work.
  • the drill is preferably connected to the hoist on the shaft collar via a segmented guide strand and can therefore be pulled to the shaft collar without prior disassembly, e.g. B. in the event of water ingress, other emergencies and for dismantling after completion of the shaft.
  • the corresponding connection also serves as a guide for the conveyor basket and as Line and carrier of supply lines. If necessary, the area of the drill on the shaft floor can be supplied with both water and air via the open inner cross-section of the guide line. Only the special arrangement of the machine elements allows a prefabricated shaft wall extension to be installed directly above the drilling machine for the smaller shaft diameters, since the shaft cross-section can be kept completely free outside the guide line (i.e. no supply lines etc.).
  • Fig. 1 shows a shaft drilling system for performing a drilling method according to the invention according to a first embodiment.
  • the individual elements of the shaft drilling system and the individual process steps are explained in more detail below.
  • a cross section through a shaft end of a vertical drill shaft 10 is shown.
  • a central guide string 60 is arranged within the drill shaft 10 along its central long axis.
  • a drilling unit 90 is arranged in the shaft end, which is designed to further advance the bore of the drilling shaft 10 and to remove overburden. This takes place, for example, by means of a rotating drill head or with any other suitable mechanized technique for expanding and / or deepening the drill shaft 10.
  • the removed overburden collects in the bottom region 12 of the shaft end.
  • the drill shaft 10 is watered in the bottom region 12 of the shaft end, so that there is a mixture of overburden and liquid.
  • a container 20 is arranged above the drilling unit 90.
  • the container 20 is designed as a collecting container 30. It is suitable for taking up the mixture of overburden and liquid from the bottom area 12.
  • a conveying container 40 is arranged in the drill shaft 10 between the drilling unit 90 and the collecting container 30. This is preferably designed and / or arranged to surround the central guide strand 60.
  • a pump system 50 is also arranged in the shaft end.
  • the pump system 50 comprises a pump, a pipe 54 and a feed line 52.
  • the pipe 54 extends to the bottom region 12 of the shaft end, in which the mixture of overburden and liquid is located.
  • the feed line 52 is connected to the collecting container 30.
  • the feed line 52 is guided along a shaft wall.
  • the mixture of overburden and liquid is transferred to the collecting container 30 by means of the pump system 50 via the feed line 52. There sedimentation causes at least some of the overburden to settle below in the collecting container 30 and the liquid essentially floats on top.
  • An overflow channel 25 is formed all around the collecting container 30 and adjacent to the shaft wall. When the maximum capacity of the collecting container 30 has been reached, excess liquid runs out of the collecting container 30 into the overflow channel 25. From there, the overflowing liquid is again conducted to the bottom region 12 of the shaft end. This is done via a down pipe 22, which is arranged along the shaft wall. Alternatively, for example, the overflowing liquid could run out of the overflow channel 25.
  • the collecting container 30 has a flap 35 in its bottom. By opening the flap 35, a ramp is formed between the collection container 30 and the delivery container 40, via which the residual mixture from the collection container 30 reaches the delivery container 40. This takes place during a pause in pumping or when the liquid mixture is pumped into a further container 30 arranged in this area, that is to say when the transfer of overburden by means of liquid to the collecting container 30 has stopped and after the collecting container 30 has been flooded.
  • the conveying container 40 is then guided along and preferably through the central guide strand 60 and transported away in the direction of an upper shaft opening. This is done via a pull rope 70.
  • the pull rope 70 is preferably also designed to hold the conveying container 40.
  • a drilling process that is carried out with the aid of such an arrangement comprises the steps described below.
  • a liquid-waste mixture is preferably generated by drilling on the shaft floor.
  • the mixture of overburden and liquid is pumped or transferred from the bottom region 12 of the shaft end into the collecting container 30. Pumping takes place until the maximum capacity of the collecting container 30 is reached and beyond.
  • the collecting container 30 is flooded by the further pumping. Surplus liquid runs out of the collecting container 30 into the overflow channel 25 and is returned from there back into the bottom region 12 of the shaft end. A residual mixture remains in the collecting container 30.
  • the pumping must be interrupted at least temporarily in order to transfer the residual mixture from the collection container 30 into the delivery container 40.
  • the parameter or parameters that lead to the interruption of the pumping can be of various types. For example, the time determines how long the pumping takes. Alternatively, the amount of liquid that has already run out of the collecting container 30 by flooding can be recorded. If this has reached a predetermined amount, the pumping process is interrupted. As an alternative or in addition, the weight of the filled collecting container 30 can be determined. For example, a maximum weight is provided.
  • the flap 35 in the bottom of the collecting container 30 is opened, so that the residual mixture collected there is reloaded into the conveying container 40.
  • the opened flap 35 forms a ramp between the collection container 30 and the delivery container 40.
  • the pump line is pivoted over the second collecting container 30 and fills it, while the contents of the first collecting container 30 are reloaded into the delivery container. Pump pauses are avoided and / or reduced and the shaft sinking speed is increased.
  • the filled delivery container 40 is transported away in the direction of the upper shaft opening by means of the pull rope 70.
  • Fig. 1 shown embodiment of the collecting container 30 and the delivery container 40 are two different units, a new transfer of spoil by means of liquid can already take place when the Delivery container 40 is transported in the direction of the upper shaft opening. This increases the effectiveness of the removal of the overburden or the residual mixture.
  • the container 20 is both a collecting container 30 and a conveying container 40.
  • the other elements shown essentially correspond to those in FIG Fig. 1 shown and described elements.
  • the embodiment of the container 20 in such a way that it is designed both as a collecting container and 30 as a production container 40 means a space saving in the drill shaft 10 and is particularly suitable for drill shafts 10 with smaller diameters, in particular with diameters smaller than four meters (4 m). are.
  • a drilling method carried out by means of such an arrangement comprises the following steps: drilling with the following pumping of the overburden / liquid mixture from the bottom of the well 10 into the collecting container 30 or into the conveying container 40 until its maximum capacity is reached and beyond; Returning the liquid that has overflowed into the overflow channel 25 into the bottom region 12 of the shaft end; and interrupting the pumping process during the removal of the container 20 designed as a collecting container 30 and / or a conveying container 40 through the drill shaft 10.
  • the container 20 is again arranged in a suitable position in the drill shaft 10, the method can be resumed.
  • Fig. 3 shows a top view of an arrangement of a collecting container 30 and a conveying container 40 of the shaft drilling system Fig. 1 ,
  • the collecting container 30 is arranged in a lateral region of the drill shaft 10 on the shaft wall.
  • An overflow channel 25 is formed in the center of the collecting container 30, through which excess liquid can run off.
  • the central guide strand 60 which runs along the central long axis of the drill shaft 10, can also be seen.
  • the conveying container 40 is arranged around this central guide line 60.
  • the base of the conveyor container 40 is essentially rectangular.
  • the conveying container 40 also has a U-shaped recess 26 which extends around the central guide strand 60. The recess 26 extends from a container opening to a container bottom.
  • Fig. 4 shows a plan view of a container 20 of the shaft drilling system arranged in a drilling shaft 10 Fig. 2 ,
  • the container 20 is also designed as a collecting container 30 and also as a conveying container 40. It essentially has a round base, which has a U-shaped recess 26.
  • the container 30 or 40 is arranged coaxially to the long axis of the drill shaft 10.
  • the central guide strand 60 runs within the U-shaped recess 26 of the container 20.
  • the center of gravity of the container 30 or 40 is shifted through the U-shaped recess 26, especially when it is filled. This means that the center of gravity of the container 30 or 40 is not on the central long axis of the drill shaft 10, but in the center of gravity of the hoist rope. This makes it easier to pull up the container 30 or 40 on the pull cable 70, which runs offset to the central guide strand 60, and the managers between the container 30 or 40 and the pull cable 70 are minimized.
  • Fig. 5 shows how emptying can be carried out on the surface.
  • an embodiment of the lifting system 80 is shown, which is arranged on the surface.
  • the container 30 or 40 is transported on the pull rope 70 through the drill shaft 10.
  • the pull rope 70 is unrolled onto a winch.
  • Detachable guide elements / holding elements 72 are arranged on the container 30 or 40, which allow the container 30 or 40 to be tilted for emptying.
  • the container 30 or 40 does not have to be detached from the central guide strand 60.
  • Fig. 6 is a further advantageous development of the shaft drilling system Fig. 2 shown.
  • only one container 20 is provided, which is both a conveying container 40 and a collecting container 30.
  • a work platform 100 is arranged below the Container 30 or 40.
  • the work platform 100 is connected to the container 30 or 40 by means of struts 102. If the container 30 or 40 moves along the central guide strand 60, the work platform 100 also moves.
  • the container 30 or 40 is shown in several positions along the central guide strand 60, as is the work platform 100.
  • the work platform 100 is arranged at a distance from the container 30 or 40. In particular, the distance is more than 1.50 m, so that a person can at least bend over on the work platform 100.
  • a protective cover 105 is additionally arranged between the work platform 100 and the container 30 or 40, in order to protect people or equipment on the work platform 100.
  • a shaft lining 110 can be installed from the work platform 100.
  • the working height of the platform 100 is preferably dimensioned such that work can be carried out comfortably and in an upright position by the personnel.
  • Fig. 7 shows a top view of a shaft lining 110 within the well shaft 10 before final assembly.
  • the shaft lining 110 is pre-assembled plates. The plates run in a spiral over one another and can be expanded to form a cylinder with the diameter of the drill shaft 10.
  • the shaft lining 110 can be expanded by means of a suitable tool 108, for example a hydraulic cylinder.
  • the shaft lining 110 is pressed against the shaft wall.
  • a support structure 115 is located on the shaft wall.
  • the support structure 115 serves to hold the shaft lining 110. Butt joints and longitudinal connections are connected to each other to ensure a stable shaft lining.
  • Fig. 8 the shaft lining 110 is made Fig. 7 shown after it is fully installed.
  • the flexible spacers 112 are in direct contact with the shaft wall. Alternatively or in addition, they can also be in contact with the support structure 115.

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Claims (22)

  1. Procédé de forage, comportant les étapes suivantes :
    - agencement d'une unité de forage (90) à une extrémité d'un puits foré (10) ;
    - production de déblais au moyen de l'unité de forage (90) ;
    - fourniture d'un récipient (30, 40) pour les déblais à l'intérieur du puits foré (10) ;
    - transfert des déblais dans le récipient (30, 40) au moyen d'un liquide, de telle sorte qu'un mélange de déblais et de liquide se trouve dans le récipient (30, 40) ;
    caractérisé par
    - le remplissage du récipient (30, 40) par un autre transfert de déblais au moyen d'un liquide, au moins le liquide en excès débordant et un mélange résiduel présentant une proportion élevée de déblais dans le récipient (30, 40) ;
    - la recirculation du liquide ayant débordé dans l'extrémité de puits ;
    - l'évacuation du mélange résiduel à travers le puits foré (10).
  2. Procédé de forage selon la revendication précédente, comportant en outre l'étape de :
    - collecte du liquide ayant débordé dans un canal de débordement (25), en particulier dans un canal de débordement (25) agencé dans ou sur le récipient (30, 40).
  3. Procédé de forage selon l'une des revendications précédentes, dans lequel la recirculation du liquide ayant débordé s'effectue à travers un tuyau de descente (22).
  4. Procédé de forage selon l'une des revendications précédentes, dans lequel le récipient (30) est un récipient de collecte (30) fixe, et comportant en outre l'étape suivante :
    - transvasement du mélange résiduel du récipient (30) dans un récipient de transport (40) supplémentaire disposé dans le puits foré (10) et pouvant être évacué à travers celui-ci.
  5. Procédé de forage selon l'une des revendications précédentes 1 à 3, dans lequel le récipient (40) est un récipient de transport (40) pouvant être évacué à travers le puits foré (10).
  6. Procédé de forage selon l'une des deux revendications précédentes, dans lequel l'évacuation du mélange résiduel s'effectue dans le récipient de transport (40).
  7. Procédé de forage selon l'une des trois revendications précédentes, comportant en outre l'étape de :
    - vidage du récipient de transport (40) à l'extérieur du puits foré (10).
  8. Procédé de forage selon la revendication précédente, comportant en outre l'étape de :
    - recirculation du récipient de transport vidé (40) dans le puits foré (10).
  9. Procédé de forage selon l'une des revendications précédentes, dans lequel l'évacuation du mélange résiduel s'effectue au moyen d'un câble tracteur (70).
  10. Système de forage de puits, comportant
    - une unité de forage (90) destinée à être agencée dans un puits foré (10), laquelle est réalisée pour déblayer des déblais à une extrémité du puits foré (10),
    - un récipient (30, 40), lequel est agencé dans le puits foré (10) et est approprié pour recevoir un mélange de déblais et de liquide,
    caractérisé par
    - un système de transfert, par exemple un système de pompage (50), pour transférer les déblais au moyen du liquide dans le récipient (30, 40), le récipient (30, 40) étant rempli et un mélange résiduel demeurant dans le récipient (30, 40),
    - un système de levage (80), lequel est approprié pour transporter le mélange résiduel à travers le puits foré (10).
  11. Système de forage de puits selon la revendication précédente, caractérisé en ce que le récipient (30, 40) comporte un canal de débordement (25).
  12. Système de forage de puits selon la revendication précédente, caractérisé en ce que le canal de débordement (25) débouche dans un tuyau de descente (22).
  13. Système de forage de puits selon la revendication précédente, caractérisé en ce que le tuyau de descente (22) est guidé le long d'une paroi de puits.
  14. Système de forage de puits selon l'une des revendications précédentes 10 à 13, caractérisé en ce qu'une ligne de guidage et/ou de levage centrale (60) s'étend le long d'un axe longitudinal central du puits foré (10) au moins pour le levage de l'unité de forage (90).
  15. Système de forage de puits selon l'une des revendications précédentes 10 à 14, caractérisé en ce que le récipient (40) est agencé de manière à entourer un axe longitudinal central du puits foré (10).
  16. Système de forage de puits selon la revendication précédente, caractérisé en ce que le récipient (40) est réalisé et agencé de telle sorte que son centre de gravité, en particulier à l'état vide du récipient (40), ne se situe pas sur l'axe longitudinal central du puits foré (10).
  17. Système de forage de puits selon l'une des deux revendications précédentes, caractérisé en ce que le récipient (40) comprend un évidement (26), de préférence un évidement (26) en forme de U en section transversale, lequel s'étend d'une ouverture de récipient à un fond de récipient.
  18. Système de forage de puits selon l'une des revendications précédentes 10 à 17, caractérisé en ce que le récipient (40) fait partie du système de levage (80) et peut être évacué à travers le puits foré (10), de manière à servir de récipient de transport et de récipient de collecte.
  19. Système de forage de puits selon l'une des revendications précédentes 10 à 18, caractérisé en ce que le récipient (40) est fixé à la ligne de guidage centrale (60) et/ou guidé sur celle-ci.
  20. Système de forage de puits selon l'une des revendications précédentes 10 à 19, caractérisé en ce que le récipient (30) est un récipient de collecte fixe (30) et un récipient de transport (40) supplémentaire est agencé dans le puits foré (10).
  21. Système de forage de puits selon la revendication précédente, caractérisé en ce que le récipient de collecte (30) peut être agencé au-dessus du récipient de transport (40) supplémentaire.
  22. Système de forage de puits selon l'une des deux revendications précédentes, caractérisé en ce que le récipient de collecte (30) comprend un volet (35) dans le fond.
EP17718486.8A 2016-04-01 2017-03-30 Une méthode et un système de forage de puits Active EP3436664B1 (fr)

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DE102016106020 2016-04-01
DE102016011332 2016-09-21
PCT/EP2017/057502 WO2017167856A1 (fr) 2016-04-01 2017-03-30 Procédé de forage et système de forage de puits

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CN (1) CN109072696B (fr)
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Publication number Priority date Publication date Assignee Title
US3265138A (en) * 1963-08-19 1966-08-09 George E Failing Company Magazine for storing and handling drill pipe in rotary drilling rig
US3735825A (en) * 1972-03-07 1973-05-29 Dresser Ind Pressure equalizing system for rock bits
US3901330A (en) * 1973-11-21 1975-08-26 Brown Oil Tools Electric power drive assembly
DE3516312C1 (de) * 1985-05-07 1986-10-16 Gesellschaft für Strahlen- und Umweltforschung mbH München, 8042 Oberschleißheim Bohrmaschine mit einem ueber ein verlaengertes Bohrgestaenge antreibbaren Bohrkopf
DE3609111A1 (de) * 1986-03-19 1987-10-01 Turmag Turbo Masch Ag Bohrmaschine
CN2046921U (zh) * 1989-04-17 1989-11-01 辽河石油勘探局钻井二公司科技科 旋流钻进增速器
KR100208546B1 (ko) * 1994-08-25 1999-07-15 야마오까 유지 세로 구멍용 굴착기
DE19702533A1 (de) * 1997-01-24 1998-07-30 Bauer Spezialtiefbau Bohrvorrichtung und Drehmomentstütze für eine Bohrvorrichtung
DE10310726B3 (de) * 2003-03-12 2004-09-30 Bauer Spezialtiefbau Gmbh Kernbohrvorrichtung mit Spülung
DE102012025395A1 (de) * 2012-12-24 2014-06-26 Herrenknecht Ag Vorrichtung zum Abteufen eines Schachts

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ZA201805981B (en) 2019-06-26
CN109072696A (zh) 2018-12-21
WO2017167856A1 (fr) 2017-10-05
AU2017242643A1 (en) 2018-10-18
AU2017242643B2 (en) 2020-01-23
EP3436664A1 (fr) 2019-02-06

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