EP3436664A1 - Procédé de forage et système de forage de puits - Google Patents

Procédé de forage et système de forage de puits

Info

Publication number
EP3436664A1
EP3436664A1 EP17718486.8A EP17718486A EP3436664A1 EP 3436664 A1 EP3436664 A1 EP 3436664A1 EP 17718486 A EP17718486 A EP 17718486A EP 3436664 A1 EP3436664 A1 EP 3436664A1
Authority
EP
European Patent Office
Prior art keywords
container
shaft
wellbore
drilling
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17718486.8A
Other languages
German (de)
English (en)
Other versions
EP3436664B1 (fr
Inventor
Niko Kleuters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nk Trading And Engineering GmbH
Original Assignee
Nk Trading And Engineering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nk Trading And Engineering GmbH filed Critical Nk Trading And Engineering GmbH
Publication of EP3436664A1 publication Critical patent/EP3436664A1/fr
Application granted granted Critical
Publication of EP3436664B1 publication Critical patent/EP3436664B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 liquid removal by means of removal of debris and to a shaft drilling system for carrying out such a drilling method.
  • Known drilling methods generally include the following steps.
  • a drilling unit arranged in a borehole to be drilled at a shaft end of the borehole is provided, which is designed to produce overburden essentially by drilling, by removing rock and soil.
  • the ablation is additionally carried out by means of blasting or with another suitable technique for expanding or deepening a well.
  • the overburden produced is absorbed by means of liquid, such as water, and the resulting mixture is applied to a surface, i. H. in the area surrounding the well opening, transported. This is usually done by means of a pumping system or an air lifting system. Occasionally also scratch systems or vacuum extraction systems were used. This has the disadvantage that with increasing depth of the wells, the capacity of the pumping system must be high and beyond the risk that this pumping system clogged. Such a malfunction can only be eliminated again with great effort. Such a fault elimination is particularly difficult if, due to a small shaft diameter of 3 m to 8 m, the shaft access is difficult. Scratch systems are subject to very high wear in abrasive rock conditions and also require too much space.
  • Vacuum systems have a very high energy demand and require a large-volume installation in the shaft, z. B. dry separation. It generates high waste heat values, which in turn require large-volume cooling systems. When water flow z. B. Scratch and vacuum systems ineffective.
  • a drilling unit is arranged at a shaft end of a drilling shaft.
  • the well for example, has a minimum diameter of 3 m to 8 m, preferably 5 m.
  • overburden is produced by means of the drilling unit by drilling removal.
  • overburden can also be generated by means of blasting.
  • a container for the overburden is provided within the well, in particular, this is suitable for receiving a mixture of overburden and liquid.
  • the overburden is transferred by means of liquid into the container, so that accumulates in this a mixture of overburden and liquid.
  • a transfer system for example, a pumping system is provided.
  • Both the drilling unit and the container are located within the wellbore.
  • the container is permanently or at least during the duration of the filling process in the volume located through the hollow volume of the shaft.
  • the container is preferably arranged closer to the shaft end than to the bore shaft opening.
  • the distance between the drilling unit and container is less than 10 m.
  • the overburden which accumulates after the removal by the drilling unit in a bottom region of the shaft end, is watered, so that there arises the mixture of overburden and water as a liquid.
  • the mixture of overburden and liquid from the shaft end is pumped into the container.
  • a flooding of the container with the mixture takes place, wherein at least excess liquid overflows from the container.
  • the overflowed liquid is taken up by an overflow channel or an overflow arranged in or on the container.
  • the flooding is carried out by further transfer of overburden by means of overburden-laden liquid in the container.
  • the heavier overburden settles at least partially below and the liquid floats on top.
  • Coarser overburden sinks faster in the container than, for example, fine-grained overburden.
  • the overburden does not have a homogeneous composition, but usually has coarser and finer constituents, the loose bed of larger constituents of the overburden forms intermediate spaces in which smaller constituents of the overburden can intercalate, so that a total of a denser mixture is further achieved by can accumulate the finer components between the coarser ingredients in the container.
  • the discontinuation of the overburden requires a certain amount of time, this is given by the duration of the filling process. It can be said that the longer the filling process lasts, the denser the mixture can become, because there is more time in which overburden can settle.
  • the duration of the filling process is determined by the transfer speed and by the maximum capacity of the container. Ideally, these two sizes are matched to achieve a good compromise between the effectiveness of the drilling operation and the nature of the mixture.
  • the supernatant or the overflowed liquid is returned to the shaft end (to the shaft bottom), in particular into the bottom area, in order to irrigate further overburden there.
  • the drilling method also comprises the step of removing the residual mixture through the well.
  • the invention does not require the provision of the usual large-volume separation elements, which in turn results in decisive space advantages on the chess floor with smaller shaft diameters.
  • the Fluid level at the shaft bottom can be controlled by supplying clean / separated fluid through a hollow guide strand. Without this advantage, efficient and safe machine drilling of smaller diameter blind wells would still be unresolved.
  • the supernatant liquid is first taken up by an overflow channel arranged in or on the container before it is returned.
  • the overflow channel is formed circumferentially at the edge of the container.
  • the recirculation of the overflowed liquid takes place via a downpipe.
  • the drop tube extends along a shaft wall, in particular from a filling platform at the upper end of the drill unit, inside along a machine-related shaft wall support device.
  • an optionally existing overflow channel opens into the downpipe.
  • the remainder of the mixture (of the liquid mixture pumped by the shaft bottom) is reloaded from the container into a separate (additional) delivery container, which is likewise arranged in the well.
  • the container fulfills the function of a collecting container, in particular a stationary collecting container.
  • a residual mixture with a high waste proportion is initially produced by overflow and recycling of excess liquid.
  • the reloading takes place, for example, in that the collecting container is arranged above the delivery container and forms a ramp by opening a flap in the bottom of the collecting container. About this ramp, the residual mixture is transported from the sump into the delivery container.
  • Another embodiment of the drilling method comprises the unloading of the mixture or the emptying of the delivery container outside the wellbore and the transport back of the conveyor container into the well, in particular into a loading position for resuming the individual process steps.
  • This embodiment makes it possible that further overburden can be transferred by means of liquid into the collecting container, while the delivery container removes the residual mixture.
  • the effectiveness of the removal of the Remaining mixture and thus also the Schachtabteuf nief be significantly increased.
  • the drilling unit removes further overburden and propulsion of the wellbore is driven independently of the delivery cycle of the container.
  • the removal of the overburden during all or even during individual process steps pause, for example, to protect other arranged in the shaft end equipment.
  • the container itself is transportable through the wellbore delivery container.
  • the delivery container may also be a further (additional) element, as described above in connection with the container designed as a stationary collection container.
  • the method according to the invention comprises the step of removing the residual mixture through the well.
  • the removal of the residual mixture takes place here in the delivery container.
  • the method further comprises the step of emptying the delivery container outside the wellbore. This takes place, for example, in a collection bunker, in which the spoil of the mixture can continue to settle. Floating liquid can also be returned to the shaft bottom again after treatment. Further measures for dewatering the mixture, for example screening methods, are conceivable.
  • the method also includes the step of returning the emptied delivery container in the well.
  • the removal of the residual mixture can be done for example via a pull rope and a lifting system.
  • the lifting system is located outside of the wellbore and includes a winch on which the pull rope is rolled up, thereby transporting the delivery bin through the wellbore.
  • Differently designed lifting systems are also conceivable and in accordance with the invention includes.
  • a lifting system according to the invention is suitable for transporting the mixture, also referred to as residual mixture, through the borehole, in particular in the delivery container.
  • the lifting system is preferably also suitable to return the delivery container in the well.
  • the delivery container is arranged surrounding a central long axis of the wellbore.
  • the container can be designed and arranged such that its center of gravity, in particular in the empty state and additionally also in the filled state with homogeneous filling, does not lie on the central long axis of the drill shaft. Its center of gravity, which is located outside the shaft axis, minimizes the executives for transporting the container.
  • a central guide strand and / or lifting strand is provided, at least for lifting the drilling unit and, for example, as a supporting attachment for those devices which are provided to supply the equipment arranged in the wellbore, such as electrical lines and / or liquid feeds and / or liquid discharges.
  • the leads etc. are preferably protected by covers attached to the guide string. These covers are preferably designed so that they simultaneously serve as guide rails for the container during the conveying operations.
  • 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 in cross section is U-shaped.
  • the recess results in an effectively space-filling arrangement of the container around the central guide strand. Furthermore, the provision of the recess ensures a shift of the center of gravity opposite the not recessed container. It is thereby achieved that the container along the guide strand on a train system, such as traction cable, can be transported stabilizing itself. The executives are thereby minimized and very advantageous higher conveyor speeds are achievable. This means that the center of gravity of the delivery container, especially in an empty state and also in the filled state with homogeneous filling, is not on the central long axis of the well, which facilitates pulling up on a traction cable which is offset from the central guide strand, and accordingly allows higher conveying speeds; Accordingly, the Schachtabteuf beautician is increased.
  • holding elements are arranged on the delivery container, on which the delivery container is hinged and thus tiltable about a pivot axis.
  • the drilling method according to the invention is particularly suitable for use in a substantially vertically formed well.
  • the upper cross-sectional opening of the container has a grid.
  • the grid is disposed below the overflow.
  • the grid serves as a coarse filter and prevents the coarser cuttings according to the mesh size to get back out of the container.
  • the mesh size can preferably be changed according to the Bohrgutbelves whatsoever.
  • a corresponding opening is provided in the grid.
  • the opening may alternatively also be formed in that the grid 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 so that at least individual grid ribs are designed to be extended and protrude into the container. As a result, this is turbulent due to the filling process Liquid mixture additionally calms and the process of settling the spoil is accelerated.
  • At least one working platform is provided within the wellbore. From the work platform, personnel can perform work within the wellbore and need not enter the flooded floor area of the wellbore.
  • the work platform is disposed surrounding the central guide track within the wellbore. In this way, a maximum size of the work platform can be achieved with a correspondingly optimized job offer.
  • the supply of the staff with sufficient breathing air, is ensured by appropriate supply through the free inner cross section of the guide strand.
  • the platform is arranged movably along the central guide track.
  • it is arranged below the container surrounding the central guide strand.
  • the work platform is connected by struts with the container.
  • the container is both conveying and collecting container.
  • the working platform can also be arranged in the two-part embodiment of the container below the conveyor container. As the container moves along the central guide track, the work platform also moves.
  • the work platform is designed to transport and hold additional equipment within the wellbore.
  • a further drilling unit is arranged on an underside of the working platform.
  • the work platform is therefore suitable to install from there a manhole lining on the shaft wall.
  • a manhole lining on the shaft wall.
  • the pre-assembled plates are transported from the surface around the central guide track on the work platform into the wellbore.
  • the manhole lining is widened by means of a suitable tool and pressed against the shaft wall.
  • This system can also be automated without the need of staff in the Wellbore.
  • the use of pre-mounted on the surface shaft wall support plates and their possible automated installation are possible only in the described drilling system, because outside the central guide strand no other disturbing leads of any kind are attached.
  • a protective cover is disposed between the work platform and the container to protect personnel and equipment located on the work platform.
  • Such a drilling method can also be referred to as solid shaft drilling or blind shaft drilling.
  • the described shaft drilling system allows for an innovative drilling process, with which especially smaller solid shaft bores or blind shaft bores between approx. 3 m and 8 m diameter can be drilled more efficiently, faster and safely for the personnel.
  • the system presents a simple separation and conveyance of the cuttings compared to all previous systems.
  • the Bohrgutseparation and centrally guided in the bay Bohrgutab consequently a shaft wall removal immediately above the drill / drilling unit.
  • the shaft wall is permanently actively supported by appropriate expansion until stabilization.
  • the special arrangement of the innovative subassemblies offers enough space to temporarily install the drill in the shaft above the drilling machine in order to carry out exploratory drilling or anchoring and consolidation work.
  • the drill is preferably connected via a segmented guide strand with the hoist on the manhole collar and thus can be drawn if necessary without prior disassembly to the manhole collar, z. B. in case of possible water infiltration, other emergencies and dismantling after completion of the shaft.
  • the corresponding connection also serves as a guide for the conveyor basket and as Cable and carrier of supply lines. If necessary, the area of the drill at the bottom of the shaft can be supplied with water and air via the open inner cross section of the guide string. Only the special arrangement of the machine elements makes it possible to install a prefabricated shaft wall construction directly above the drilling machine for the smaller shaft diameters, since the shaft cross section outside the guide track can be kept completely free (ie no supply lines, etc.).
  • Fig. 1 shows a partial view in longitudinal section of an exemplary embodiment of a shaft drilling system according to the invention within a borehole for carrying out an embodiment of a drilling method according to the invention
  • 2 shows a partial view in a longitudinal section of a further exemplary embodiment of a shaft drilling system according to the invention within a bore shaft for carrying out a further exemplary embodiment of a drilling method according to the invention
  • FIG. 3 is a plan view showing an arrangement of a header tank and a delivery tank of the shaft drilling system of FIG. 1,
  • Fig. 4 is a plan view of an arrangement of a collection container and a delivery container of the wellbore drilling system of FIG. 2,
  • Fig. 5 is a partial view of the shaft drilling system of FIG. 2 on a surface outside the wellbore
  • Fig. Fig. 6 is a fragmentary longitudinal sectional view of yet another embodiment of a wellbore drilling system according to the invention within one embodiment Borehole for carrying out a further embodiment of a drilling method according to the invention
  • FIG. 7 shows a plan view of a shaft lining for a well shaft before installation on the well shaft
  • FIG. 8 is a plan view of the manhole lining of FIG. 7 after its installation at the well shaft.
  • FIG. 1 shows a shaft drilling system for carrying out a drilling method according to the invention according to a first exemplary embodiment.
  • the individual elements of the shaft drilling system and the individual process steps are explained in more detail below.
  • a drilling unit 90 is arranged in the shaft end, which is adapted to further advance the bore of the wellbore 10 and remove overburden. This is done, for example, by means of a rotating drill head or with any other suitable mechanized technique for expanding and / or recessing the wellbore 10.
  • the removed overburden collects.
  • the wellbore 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 disposed above the drilling unit 90. In the exemplary embodiment shown, the container 20 is designed as a collecting container 30. It is suitable for receiving the mixture of overburden and liquid from the bottom region 12.
  • a delivery container 40 is arranged in the wellbore 10. This is preferably designed surrounding the central guide strand 60 and / or arranged.
  • the pumping system 50 includes a pump, a tube 54 and a supply line 52.
  • the tube 54 extends to the bottom portion 12 of the shaft end, in which the mixture of spoil and liquid is located.
  • the supply line 52 is connected to the collecting container 30 in connection. For example, the supply line 52 is guided along a shaft wall.
  • the mixture of overburden and liquid is transferred by means of the pumping system 50 via the supply line 52 into the collecting container 30. There settles by sedimentation at least a portion of the overburden down in the sump 30 and the liquid floats substantially on top.
  • an overflow channel 25 Surrounding the collecting container 30 and adjacent to the shaft wall, an overflow channel 25 is formed. When the maximum capacity of the sump 30 is reached, excess liquid from the sump 30 flows into the overflow channel 25. From there, the overflowing liquid is again directed to the bottom portion 12 of the sump end. This is done via a downpipe 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 forms between the collecting container 30 and the delivery container 40, via which the residual mixture passes from the collecting container 30 into the delivery container 40. This occurs during a pumping pause or when the liquid mixture is pumped into another container 30 arranged in this region, ie when the transfer of overburden by means of liquid rests in the collecting container 30 and after the collecting container 30 has been flooded.
  • the delivery container 40 is subsequently guided along the central guide strand 60 and preferably through it and transported away in the direction of an upper shaft opening. This is done via a pull cable 70.
  • the pull cable 70 is also designed to hold the delivery container 40.
  • a drilling method performed by such an arrangement includes the steps described below.
  • a liquid waste mixture is produced by drilling at the bottom of the shaft.
  • the mixture of overburden and liquid is pumped or transferred from the bottom region 12 of the shaft end into the collecting container 30.
  • the pumping is done until the maximum capacity of the sump 30 is reached and beyond.
  • the collecting container 30 is flooded by the further pumping. Supernatant liquid runs out of the collecting container 30 out into the overflow channel 25 and is returned from there back into the bottom region 12 of the shaft end. In the collecting container 30 remains a residual mixture. If only one collecting container 30 is present, the pumping must be interrupted at least temporarily in order to reload the residual mixture from the collecting container 30 into the delivery container 40.
  • the parameter (s) leading to the interruption of the pumping can be of various types. For example, over time, it determines how long to pump. Alternatively, the amount of liquid can be detected, which has already run out of the sump 30 by flooding. If this has reached a predetermined amount, the pumping process is interrupted. Alternatively or additionally, the weight of the filled collecting container 30 can be determined. For example, a maximum weight is provided.
  • the flap 35 is opened in the bottom of the collecting container 30, so that the residual mixture collected there is reloaded into the delivery container 40. The opened flap 35 forms a ramp between the collecting container 30 and the delivery container 40.
  • the pumping line is pivoted via the second collecting container 30 and fills it, while the contents of the first collecting container 30 are reloaded into the conveying container.
  • pump breaks are avoided and / or reduced and the Schachtabteuf fie increased.
  • the filled conveyor container 40 is transported away by means of the pull cable 70 in the direction of the upper shaft opening.
  • the container 20 is both a collecting container 30 and a delivery container 40.
  • the other elements shown correspond essentially to those shown in FIG. 1 elements shown and described.
  • the embodiment of the container 20 such that it is also designed as a collecting container and 30 as a delivery container 40, means a space savings in the wellbore 10 and is particularly suitable for wells 10 with smaller diameters, especially with diameters smaller than four meters (4 m) are .
  • a drilling method performed by means of such an arrangement comprises the following steps: drilling with subsequent pumping of the spoil / liquid mixture from the bottom of the wellbin 10 into the collection container 30 or into the delivery container 40 until its maximum capacity is reached and beyond; Returning the overflowed into the overflow channel 25 liquid in the bottom portion 12 of the shaft end; and interrupting the pumping operation during the removal of the container 20 formed as a collection container 30 and / or delivery container 40 through the wellbore 10. When the container 20 is again located in a suitable position in the wellbore 10, the process can be resumed.
  • FIG. 3 shows a top view of an arrangement of a collection container 30 and a delivery container 40 of the well drilling system of FIG. 1.
  • the collecting container 30 is arranged in a lateral region of the wellbore 10 at the shaft wall.
  • an overflow channel 25 is formed, can run through the supernatant liquid.
  • the central guide strand 60 which runs along the central long axis of the wellbore 10.
  • the base of the delivery container 40 is formed substantially rectangular.
  • the delivery 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 of FIG. 2.
  • the container 20 is also designed as a collection container 30 and also as a delivery container 40. He has essentially a round base, which has a U-shaped recess 26.
  • the container 30 or 40 is arranged coaxially with the long axis of the wellbore 10.
  • the central guide strand 60 extends within the U-shaped recess 26 of the container 20th
  • the center of gravity of the container 30 and 40 in particular when it is filled, displaced from the central position.
  • the pulling up of the container 30 or 40 on the pull cable 70 which is offset from the central guide strand 60, is facilitated, and the guiding forces between container 30 or 40 and pull cable 70 are minimized.
  • the emptying of the container 30 or 40 by tilting relative to the long axis of the wellbore 10 is made possible by the U-shaped recess 26.
  • Fig. 5 shows how the emptying can be done 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 to the pull cable 70 through the wellbore 10.
  • the pull cable 70 is rolled up or unrolled onto a winch.
  • detachable guide elements / holding elements 72 are arranged, which allow a tilting of the container 30 and 40 for emptying.
  • the container 30 or 40 need not be detached from the central guide strand 60.
  • Fig. 6 is a further advantageous development of the shaft drilling system from FIG. 2 shown.
  • only one container 20 is provided, which is at the same time conveying container 40 and collecting container 30.
  • a work platform 100 is arranged below the Container 30 and 40.
  • the work platform 100 is connected by struts 102 to the container 30 and 40, respectively. 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 well as the work platform 100.
  • the work platform 100 is spaced from the container 30 and 40, respectively. In particular, the distance is more than 1.50 m, so that a person can at least stand bent on the work platform 100.
  • a protective cover 105 is additionally arranged in order to protect persons or equipment on the work platform 100.
  • a manhole liner 110 may be installed.
  • the working height of the platform 100 is preferably dimensioned so that the work can be carried out by the staff comfortably and in an upright position.
  • Fig. Figure 7 shows a top view of a manhole liner 110 within the wellbore 10 prior to final assembly.
  • the manhole lining 110 is a pre-assembled plate. The plates spiral over each other and can be expanded to a cylinder with the diameter of the wellbore 10.
  • On the outside of the tube or shaft lining 110 are flexible spacers 112, which ensure safe contact with the well wall even with the resulting shaft diameter tolerances.
  • the shaft lining 110 can be expanded by means of a suitable tool 108, for example a hydraulic cylinder.
  • the manhole lining 110 is pressed against the shaft wall.
  • At the shaft wall is a support structure 115.
  • the support structure 115 serves to hold the manhole lining 110. Shocks and longitudinal joints are connected together to ensure a stable shaft lining.
  • the flexible spacers 112 are in direct contact with the shaft wall. Alternatively or additionally, they may also be in contact with the support structure 115.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne un procédé de forage selon lequel un déblai est produit par une unité de forage (90) dans une extrémité de puits d'un puits de forage (10). Le déblai est transféré au moyen de liquide dans un réservoir (30, 40) placé à l'intérieur du puits de forage (10). Dans le récipient (30, 40) se trouve donc un mélange composé du déblai et du liquide. Le réservoir (30, 40) est rempli sous l'effet d'un autre transfert du déblai au moyen du liquide, et au moins du liquide surnageant déborde. Il reste dans le réservoir (30, 40) un mélange résiduel. Le liquide ayant débordé est retourné dans l'extrémité du puits. Le mélange résiduel est évacué en traversant le puits de forage (10). Dans la zone de l'unité de forage (90) sont produits par ces méthodes de séparation spéciales des vides qui permettent pour la première fois, même pour de petits diamètres du puits, un fonctionnement du forage efficace, fiable et commercialement avantageux en mode de forage de puits complet. L'invention concerne par ailleurs un système de forage de puits approprié pour la mise en œuvre du procédé de forage.
EP17718486.8A 2016-04-01 2017-03-30 Une méthode et un système de forage de puits Active EP3436664B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
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

Publications (2)

Publication Number Publication Date
EP3436664A1 true EP3436664A1 (fr) 2019-02-06
EP3436664B1 EP3436664B1 (fr) 2020-02-12

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EP17718486.8A Active EP3436664B1 (fr) 2016-04-01 2017-03-30 Une méthode et un système de forage de puits

Country Status (5)

Country Link
EP (1) EP3436664B1 (fr)
CN (1) CN109072696B (fr)
AU (1) AU2017242643B2 (fr)
WO (1) WO2017167856A1 (fr)
ZA (1) ZA201805981B (fr)

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DE102012025395A1 (de) * 2012-12-24 2014-06-26 Herrenknecht Ag Vorrichtung zum Abteufen eines Schachts

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Publication number Publication date
EP3436664B1 (fr) 2020-02-12
CN109072696A (zh) 2018-12-21
WO2017167856A1 (fr) 2017-10-05
AU2017242643B2 (en) 2020-01-23
CN109072696B (zh) 2020-09-25
ZA201805981B (en) 2019-06-26
AU2017242643A1 (en) 2018-10-18

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