EP4222344B1 - Bohrsystem zum bergen von nahezu ungestörten bohrkernen aus lockerem bis festem grund - Google Patents

Bohrsystem zum bergen von nahezu ungestörten bohrkernen aus lockerem bis festem grund Download PDF

Info

Publication number
EP4222344B1
EP4222344B1 EP21782980.3A EP21782980A EP4222344B1 EP 4222344 B1 EP4222344 B1 EP 4222344B1 EP 21782980 A EP21782980 A EP 21782980A EP 4222344 B1 EP4222344 B1 EP 4222344B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
drill
pipe
flushing
pressure
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.)
Active
Application number
EP21782980.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4222344A1 (de
Inventor
Daniel Studer
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.)
Stumatec Ag
Original Assignee
Stumatec Ag
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 Stumatec Ag filed Critical Stumatec Ag
Publication of EP4222344A1 publication Critical patent/EP4222344A1/de
Application granted granted Critical
Publication of EP4222344B1 publication Critical patent/EP4222344B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • 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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
    • 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
    • E21B1/00—Percussion drilling
    • E21B1/12—Percussion drilling with a reciprocating impulse member
    • E21B1/14—Percussion drilling with a reciprocating impulse member driven by a rotating mechanism

Definitions

  • This drilling system relates to a method and a device for taking drill cores from, in particular, loose but also solid subsoil, whereby the drill core samples can be recovered and deposited almost undisturbed.
  • a cylindrical core is taken from the ground in a hollow cylindrical sleeve, the so-called core catcher or drill sample catcher, and brought to the surface.
  • cores measure, for example, about one meter in length and 10 cm to 20 cm in diameter. However, they can also be chosen to be considerably larger or considerably smaller, depending on requirements and the corresponding dimensions of the drilling equipment.
  • this core is ejected from the hollow cylindrical sleeve and then lies horizontally, freely accessible, for example on the inner shell of a half cylinder or on a flat surface. Insofar as such a soil sample partially disintegrates due to the consistency of the material when it is ejected from the sleeve, it is no longer 100% undisturbed.
  • the sleeve can also be equipped with a liner made of, for example, rigid PVC or another suitable material that fits snugly against its inner wall, so that this liner is also pushed over the ground material with the sleeve as the drill advances.
  • a liner made of, for example, rigid PVC or another suitable material that fits snugly against its inner wall, so that this liner is also pushed over the ground material with the sleeve as the drill advances.
  • the liner is ejected from it, with the drill core inside unchanged, just as it lay underground, and it can later be opened in slices, for example with diametrical cuts, so that the sample is then completely undisturbed.
  • a liner One advantage is that after the core is recovered from the casing, any volatile pollutants present in the core are trapped and preserved in the core.
  • the use of liners is more complex and also more expensive than drilling without such liners.
  • Soil samples recovered in this way provide information about the soil condition and in particular about any pollutants that have penetrated the soil over time. This makes it possible to create reliable damage registers and to initiate suitable measures for the remediation of such soils. It is particularly interesting for agriculture to use such registers to gain knowledge about soil quality, the mineral composition of humus soils and their nutrient richness, or to gain knowledge of any deficiencies in the soil. This can then provide information about which soils are suitable for which crops and how they should be fertilized, which ultimately promotes ecological and productive management of agricultural land.
  • Such core drillings are also suitable for taking soil samples in old landfills, in soils suspected of being contaminated and in loose rock formations, i.e. in fine sand layers, in peat layers and in the lake chalk. The drilling process also works in soil layers that are in the groundwater.
  • a well-known and frequently used method is the taking of soil samples from solid subsoil for geotechnical evaluation.
  • SPT Standard Penetration Test
  • ASTM American Society for Testing and Materials
  • the test uses a thick-walled sample tube with an outer diameter of 50.8 mm, an inner diameter of 35 mm and a length of approximately 650 mm. This is driven into the ground at the bottom of a borehole by blows from a slide hammer with a mass of 63.5 kg, which is dropped over a distance of 760 mm.
  • the sample tube is driven 150 mm into the ground, and then the number of blows required for the tube to penetrate 150 mm each to a depth of 450 mm is recorded.
  • N-value The sum of the number of blows required for the second and third 6-inch penetrations is called the "standard penetration resistance" or "N-value,” which is measured in blows per foot ( beats per foot - bpf ). This value is fundamental to many of the different types of geotechnical calculations such as bearing capacity and settlement estimates. In cases where 50 blows are not sufficient to advance the penetration through an interval of 150 mm, the penetration is recorded after 50 blows. The blow rate gives an indication of the density of the soil and is used in many empirical geotechnical formulas.
  • drilling equipment which includes a drill pipe with a starting pipe with a core bit at the bottom, whereby drilling is carried out by rotating the drill pipe and thus the starting pipe and the core bit and simultaneously striking and therefore ramming the ground.
  • a sleeve is inserted inside the starting pipe with a small amount of play as a core catcher. This sleeve is located at the bottom of the core bit on a projection that projects radially inwards.
  • the sleeve does not rotate during drilling, but is pressed in an axial direction without rotation together with the rotating movement of the starting pipe downwards over the drilled core and sunk over it.
  • Practice therefore shows that the task which the EP2 050 923 to be solved was an improper one, i.e. it did not exist at all.
  • the drill core growing into the sinking sleeve will hardly rotate, or at most only very slightly, due to its connection to the subsoil.
  • a fixing rod to hold the sleeve in place and prevent it from rotating is therefore superfluous.
  • Unsuitable drilling methods can also lead to contamination from certain layer depths being carried downwards by the drill bit or core barrel during the drilling process. In such cases, a recovered core sample can no longer be described as being anywhere near undisturbed.
  • the present invention has the task of specifying a drilling system, i.e. a method and a device for taking almost undisturbed soil samples from loose subsoil in particular , but equally from solid subsoil, which drilling system is clearly superior to conventional methods in several respects.
  • the actual drilling should thus take place more quickly and any drilling interruptions should be reduced to a minimum time window.
  • the device should have a much longer service life than conventional drill rods and their components.
  • the boreholes should provide almost undisturbed soil samples and, depending on their properties, can be secured in such a way that if they fall apart due to the consistency of the material, the significance of the sample analysis is not affected or only slightly affected.
  • this drilling system i.e. the device and the method used with it, is presented and the individual features and aspects of the method and the device are described in an understandable manner. The special features and the function of the device and its components are explained in detail.
  • Figure 1 a hammer drill with drive and hammer for rotating the drill head, as is common in the trade.
  • the output shaft 1 protrudes from the bottom, which has a thread 3 and is rotated by a hydraulic drive 2 arranged on the side.
  • the hammer drill contains a hammer mechanism inside, which applies ramming blows to the output shaft 1 from above.
  • the rotation speeds of the drive vary from approx. 50 to 1000 Umin -1 . The lower the speed, the higher the torque applied to the output shaft 1, which reaches approx. 15 kNm at 50 Umin -1 .
  • the ramming blows are generated at hydraulic pressures of up to 200 bar and have impact energies of up to 500 Nm, with impact cadences of up to 2400 min -1 .
  • This hammer drill is shown in a view from below with the output shaft 1 protruding below and in Figure 3 in the upright position of use, as the hammer drill is used, with the drill head 5 connected to the output shaft 1 at the bottom, for which the thread 3 of the output shaft 1 was screwed into the drill head.
  • the Figure 4 shows a drill head separately and enlarged, with its external thread for screwing into a drill pipe, and in Figure 5 This drill head is also shown in a longitudinal section. You can see the central axial bore 6 for flushing, the axial bore 37 with inner wall from below and a radial bore 7 for ventilation.
  • the Figure 6 the assembled drilling system 4 with the drilling head 5 for the drive at the top. It is screwed into an internal thread of the adjacent drilling pipe 9 and can then drive and rotate it clockwise - seen from above.
  • the drilling pipe 9 is here with its lower external thread in a appropriate internal thread at the top of the starting pipe 8. These threads are relatively coarse threads that are milled out of the material of the pipes. The threads are preferably re-greased for each screwing together, which is carried out using the rotating drill head 5.
  • the drill pipe 9 can be extended with one or more drill pipe sections in order to penetrate deeper into the ground. The drill pipe sections are advantageously about 1 meter in length. They are then handy and can be carried by one person and deposited in a stack next to the drilling device for installation.
  • the starting pipe 8 has a drill bit 10 at its lower end.
  • the Figure 7 shows this composite drilling system viewed from below, while in Figure 8 a single drill pipe 9 is shown as seen from below.
  • a relatively coarse external thread 11 is formed, with which it can be screwed into a matching internal thread 12 on the next drill pipe 9, as in Figure 9 shown, or with which it can be screwed into the lowest pipe, i.e. the starting pipe 8.
  • the hammer drill drive rotates clockwise when drilling, i.e. in the sense of tightening these connecting threads 11, 12.
  • drilling in an anti-clockwise direction is also possible in the same way, but then the threads used would also have to run the other way round.
  • the Figure 10 finally shows the drill bit 10 in an enlarged view seen from below at an angle.
  • Drill segments 13 offset with hard metal pins are soldered onto the drill grains at the bottom, and lateral outer removal elements 15 with inclined surfaces 14 ensure that the material is removed upwards.
  • the volume of material which is located axially under the drill bit segments 13 of the drill bit 10, i.e. exactly under the rotating ring which the drill bit 10 forms, is partly pressed into the drill core, partly into the surrounding ground, and part is conveyed upwards as removal on the outside of the drill bit 10 and the starting pipe 8 and the drill pipe 9.
  • a shoulder 16 is formed on the inside as a radially inwardly projecting projection, on which the sleeve or the drill sample sleeve or the drill core catcher strikes, although this is not shown here.
  • This sleeve is flush with the projection on the inside.
  • the sinking sleeve or core catcher covers the exposed core and encloses it tightly. It is possible to use other commercially available core bits, for example For example, diamond crowns or those with other decorations.
  • the Figure 11 shows a sleeve 17 or a core catcher starting from the bottom. At the top you can see the sleeve adapter 21, then the pressure, flushing and recovery pipe 19 with its upper pressure, flushing and recovery pipe adapter 18, which is affected by the impacts of the ramming hammer. In the example shown, this pressure, flushing and recovery pipe 19 rotates uniformly with the starting pipe 8 and any inserted drill pipe sections for the drill pipe 9 ( Figure 6 ).
  • a very special and extremely important element is the sleeve adapter 21 shown here between the pressure, flushing and recovery pipe 19 and the sleeve 17 or the core catcher. While the pressure, flushing and recovery pipe 19 rotates and strikes, the sinking sleeve 17 encloses the core growing into it as the drilling progresses without rotating. Only the strong and high-frequency ramming blows act from the pressure, flushing and recovery pipe 19 on the sleeve 17 and place enormous peaks of force on this sleeve adapter 21.
  • the Figure 12 shows the upper pressure, flushing and recovery pipe adapter 18 or DSB adapter of the pressure, flushing and recovery pipe 19 in an enlarged view. Flushing water runs through the axial bore with its inner wall 52 through the interior of the pressure, flushing and recovery pipe 19 and is guided outwards within the sleeve adapter 21 to the outside of the starting pipe 8. On the pressure, flushing and recovery pipe adapter 18 one can see a circumferential annular groove 54 into which an O-ring is inserted to seal against the inner wall of the axial bore 37 of the drill head 5.
  • the Figure 13 shows a hollow pressure, flushing and recovery pipe section (DSB) 53 as an extension pipe for the hollow pressure, flushing and recovery pipe 19, which is simply screwed with its lower external thread into the upper, corresponding internal thread of the pressure, flushing and recovery pipe 19 connected below.
  • the extension pipe 53 thus essentially corresponds to the actual pressure, flushing and recovery pipe 19, which in the example shown has an internal thread at the top for extension.
  • the very essential and special element of this drilling system is presented, namely the sleeve adapter 21, which ensures the connection from the DSB 19 to the sleeve 17.
  • the Figure 14 this sleeve adapter 21 for the impact-resistant connection of the sleeve 17 or the core catcher to the pressure, flushing and recovery pipe DSB 19 in a diagonal view from above.
  • a threaded stub 35 protrudes from the sleeve adapter 21, which runs down into a base body 22 of the sleeve adapter, which base body 22 forms a plate or shoulder 44 at the top.
  • a sealing ring 36 which is preferably made of plastic hard rubber and can rotate with the base body 22.
  • the rotation of the pressure, flushing and recovery pipe 19 is absorbed between the base body 22 and the stationary receiving ring 23, so that the stationary lower part 24 of the adapter 21 is connected to the sleeve 17 in a pressure-locking but rotationally fixed manner. Above the visible part of the lower part 24 you can see a sliding sleeve 25, the purpose of which will become clear later.
  • the sleeve 17 or the core catcher is pushed onto this lower part 24 from below until the upper edge of the sleeve 17 hits the sliding sleeve 25 at the bottom.
  • a pressure ring 33 made of hardened steel is also attached to the bottom of the receiving ring 23 of the adapter.
  • a rubber disk 27 that projects slightly radially beyond the lower part 24 to seal the sleeve adapter 21 against the inner wall of the sleeve 17.
  • the sleeve adapter 21 is shown in a view obliquely from below.
  • the rubber disk 27, which projects slightly radially to seal the sleeve adapter 21 against the inner wall of the sleeve 17, is clamped to the lower part 24 with a steel disk 29 and four axial screws 31.
  • the detailed structure of the sleeve adapter 21 is shown in the Figure 16 , which shows this sleeve adapter 21 in an exploded view with the parts exploded along its central axis.
  • This receiving ring 23 is stationary during operation, i.e. does not rotate, and at the bottom it merges into a tapered section and this has radial holes 41 all around, into which cylindrical pins 32 fit, which are shown further down for the lower part 24 and whose function becomes immediately clear.
  • a circlip 26 is shown as a locking ring, which comes to rest in the annular groove 45 on the base body 22 when assembled.
  • This likewise stationary lower part 24 of the sleeve adapter 21 is pushed from below over this tapered part of the receiving ring 23 and then the cylindrical pins 32 marked all around are pressed from the outside into the radial holes 42 on the lower part 24 as well as into the radial holes 41 on the receiving ring 23 that are then aligned with them, whereby these two parts 23, 24 are connected to one another in a rotationally fixed manner.
  • the sliding sleeve 25 is pushed over this tapered lower part of the receiving ring 23 while covering and thus securing these cylindrical pins 32.
  • the locking ring 26 is then inserted into the ring groove 45 at the lower end of the Base body 22 so that it sits on the base body 22 with the receiving ring 23 secured in the axial direction.
  • the lower part 24 of the adapter 21 has a diametrical bore 43 for receiving a fixing bolt (not shown).
  • a fixing bolt (not shown).
  • At right angles to this diametrical bore 43 there are two further radial bores 38 lying on a common axis into which locking bolts 34 are inserted in order to secure the inserted fixing bolt.
  • These two locking bolts 34 each have a pressure-loaded ball 40 at the front which engages in a longitudinal groove on the inserted fixing bolt and, for example, snaps into a recess 56 halfway along the groove, thus securing it.
  • the locking bolts 34 are each secured by means of a circlip 39.
  • the flushing water which is led downwards from above through the hollow pressure, flushing and recovery pipe 19, flows outwards through the fixing bolt in the bore 43, which has an axial bore, as will become clear.
  • This flushing water flows first through the sleeve adapter 21 and then radially out of its lower part 24, namely on both sides through the fixing bolt in its axial bore to its front sides and thus outwards.
  • the pressure ring 33 takes on the axial forces of the sliding sleeve 25 and distributes these evenly over the receiving ring 23, which is made of aluminium bronze.
  • the rubber disk 27 and the slightly smaller steel disk 29 are clamped to the lower part 24 on four washers 28 and by means of the four screws 31 shown and their associated spring washers 30 to secure them.
  • the Figure 17 shows the sleeve 17 or the core catcher seen from below at an angle.
  • the sleeve 17 is equipped on its inside with a number of spring steel elements 20 distributed around its circumference, which here protrude in an arc shape upwards and towards the central axis of the sleeve 17.
  • the Figure 18 shows the sleeve 17 or the core catcher viewed from above at an angle and here you can see that there are two diametrically aligned holes 46 that are made in the upper edge area of the sleeve 17.
  • these two holes 46 come to lie over the radial holes 43 in the lower part 24, so that the flushing water that flows from the front sides of the fixing bolt inserted there finally penetrates from the inside of the adapter 21 to the outside and through these aligned holes 46 in the upper area of the sleeve 17 to the very outside.
  • This flushing water takes on several functions.
  • the sleeve adapter 21 cools the sleeve adapter 21, which is heated due to the sliding friction between the rotating base body 22, the plastic-hard rubber sliding ring 36 and the stationary receiving ring 23 and lower part 24, as well as due to the ramming blows. It also lubricates between the outside of the non-rotatable sleeve 17 and the inside of the starting pipe 8 rotating around the sleeve, and finally it conveys waste from below the drill bit 10 radially outwards and then upwards on the outside of the starting pipe 8. This means that the borehole is continuously flushed and the starting pipe 8 is also lubricated and cooled on the outside. Depending on the conditions, it is also possible to drill dry.
  • the Figure 19 shows an insert rolled out in the relaxed state with spring steel elements 20, which here form a comb.
  • This comb is rolled lengthwise and then inserted into the sleeve 17, where it rests on an inner shoulder 58, as can be seen in Figure 17 can recognize.
  • the Figure 20 shows the exposed starting pipe 8 at the bottom with the sleeve 17 inside and the hollow pressure, flushing and recovery pipe 19 screwed onto it by means of the sleeve adapter 21.
  • the drill head 5 which is set in rotation here via a flange 47 by the hydraulic drill drive of the hammer drill 2.
  • drill pipe sections can be used as extension pipes for the drill pipe 9 if required, depending on the desired drilling depth.
  • the drill head 5 is screwed directly onto the starting pipe 8 at the beginning. Then drilling takes place until the starting pipe 8 is almost drilled into the ground. The drill head 5 is then unscrewed from the starting pipe 8 by counter-rotating.
  • the pressure, flushing and recovery pipe 19 with the sleeve 17 hanging from it at the bottom can be pulled upwards axially out of the starting pipe 8, as shown in Figure 21 is shown, where the sleeve adapter 21 is just emerging.
  • Figure 22 the adapter 21 of the pressure, flushing and recovery pipe 19, together with the attached sleeve 17 or the core catcher, has been completely pulled out of the starting pipe 8.
  • the fixing bolt 48 is knocked out or pulled out or pushed out of the hole 43 in the lower part 24 of the sleeve adapter 21, as has already been done in the view shown. Only the empty diametric hole 43 on the lower part 24 of the sleeve adapter 21 is visible here.
  • locking bolts 34 are inserted, which have a ball 40 at the front that is pressure-loaded by a compression spring, as in Figure 16
  • the fixing bolt 48 is pushed against the resistance of these pressure-loaded balls 40 at the front the locking bolt 34 is knocked out of the diametrical hole 43, as can be seen from Figure 24 becomes clear.
  • the Figure 24 shows the lower part 24 of the sleeve adapter 21 enlarged with a view into the diametrical bore 43 for the fixing bolt 48, which is shown separately next to it.
  • this in order to be inserted into the lower part 24 of the sleeve adapter 21, this must first be rotated by 45° around its longitudinal axis, as indicated by an arrow.
  • Channel-like longitudinal grooves 50 are cut out of this fixing bolt 48 on two opposite sides, the groove bottom of which has a curved recess 56 halfway over the fixing bolt 48.
  • the sleeve 17 or the core catcher After the sleeve 17 or the core catcher has been brought into a horizontal position on the surface and the core inside has been carefully pushed out of the sleeve 17 onto a channel-shaped core carrier using a piston, this core is almost undisturbed.
  • the empty sleeve 17 can be immediately reinserted for the removal of the next core, or an empty sleeve 17 that is already lying ready can be inserted.
  • a liner can be inserted into the sleeve 17, which then lines the inside of the sleeve 17 and into which a core grows. In this case, the recovered core is pushed out of the sleeve 17 together with the liner and is then absolutely intact like a sausage.
  • Individual slices can be cut off in tranches in order to Structure of the drill core and how this changes along its entire length. If a sleeve 17 together with the drill core is brought to the surface in the process, an empty sleeve 17 can be connected to the sleeve adapter 21 immediately and without any delay after the sleeve 17 has been separated from the sleeve adapter 21 and this can be immediately lowered back into the starting pipe 8 in the borehole and drilling can thus continue without having to interrupt the drilling work due to the removal of the drill core from the recovered sleeve 17.
  • the Figure 25 shows how the sleeve adapter 21 is connected to an empty sleeve 17 by lowering it into it, and when the bore 43 on the sleeve adapter 21 is aligned with the bore 46 on the sleeve 17, the fixing bolt 48 can be inserted and the sleeve 17 is ready to be lowered into the starting pipe 8 with the pressure, flushing and recovery pipe 19.
  • This lowering is in Figure 26 As soon as the sleeve 17 is completely inserted into the starting pipe 8, i.e.
  • FIG. 27 A drill pipe 9 is put over the pressure, flushing and recovery pipe 19 as an extension pipe and lowered onto the starting pipe 8 as shown in Figure 28 shown, and then screwed onto the starting tube 8, as shown in Figure 29 shown.
  • Figure 30 At the end, as in Figure 31 shown first the pressure, flushing and recovery pipe adapter 18 of the pressure, flushing and recovery pipe 19 is plugged or screwed on, and then, from the situation as in Figure 32 shown, the drill head 5 is screwed onto the drive flange 47 as shown in Figure 33 The details are shown in the Figures 34 to 36 shown.
  • the pressure, flushing and recovery pipe 19 aptly bears its name. Firstly, during drilling it rotates uniformly with the drill pipe 9 or initial pipe 8, and the sleeve adapter 21 at its lower end provides the connection to the stationary sleeve 17 or the core catcher. The hard ramming blows on the pressure, flushing and recovery pipe 19 are transferred reliably and directly by the sleeve adapter 21 to the sleeve 17 or the core catcher. This is why the sleeve is pressed downwards with the same pressure as the core bit 10, which ensures that the sleeve 17 is continuously sunk over the exposed core. The pressure, flushing and recovery pipe 19 therefore firstly fulfils a pressure function .
  • flushing water can be pumped downwards through the pressure, flushing and recovery pipe 19 and this is channeled outwards through the sleeve adapter 21, i.e. firstly axially through the pressure, flushing and recovery pipe 19, then axially through the sleeve adapter 21 and finally radially, i.e. in the axial direction through the diametrically inserted fixing bolt 48 on its two end faces and then outwards through the bore 46 in the sleeve 17.
  • the pressure, flushing and recovery pipe 19 therefore secondly also has a flushing function .
  • the pressure, flushing and recovery pipe 19 therefore also has a recovery function . It integrally combines these three important functions.
  • the pressure, flushing and recovery pipe 19 rotates with the drill head 5 and the drill pipe 9 and the sleeve adapter 21 mediates the rotationally fixed or non-rotating sleeve 17 by having two axially successive parts that can be rotated relative to one another.
  • a sealing ring 36 made of plastic hard rubber is preferably arranged between the axially successive parts.
  • the pressure, flushing and recovery pipe 19 is then screwed to only one lower part of a sleeve adapter 21, for which purpose this lower part forms a thread stub at the top and the rotary, flushing and recovery pipe 19 has a corresponding internal thread at the bottom.
  • the connection of the lower part of the sleeve adapter 21 to the sleeve 17 takes place as already introduced via the fixing bolt 48 with its axial bore 55.
  • the flushing takes place as usual from the drill head 5 through the pressure, flushing and recovery pipe 19 and the lower part of the sleeve adapter 21 and then through the fixing bolt 48 to the outside.
  • the pressure, flushing and recovery pipe 19 also performs the three functions mentioned above, namely firstly, exerting pressure on the sleeve 17, secondly, flushing and thus cooling, and thirdly, recovering the sleeve 17 when it is full, i.e. pulling it upwards into the light of day. And despite the fact that the pressure, flushing and recovery pipe 19 does not rotate in this design, if the sleeve 17 rotates by a few degrees over a core during the drilling process, it can rotate with it and the drill head adapter as a turntable body at the top with its two axially successive and mutually rotatable parts mediates in this case to the rotating drill head 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP21782980.3A 2020-09-30 2021-09-24 Bohrsystem zum bergen von nahezu ungestörten bohrkernen aus lockerem bis festem grund Active EP4222344B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01240/20A CH717907A1 (de) 2020-09-30 2020-09-30 Verfahren und Vorrichtung zum Kernbohren und Bergen von nahezu ungestörten Bohrkernen aus lockerem bis festem Grund.
PCT/EP2021/076384 WO2022069372A1 (de) 2020-09-30 2021-09-24 Bohrsystem zum bergen von nahezu ungestörten bohrkernen aus lockerem bis festem grund

Publications (2)

Publication Number Publication Date
EP4222344A1 EP4222344A1 (de) 2023-08-09
EP4222344B1 true EP4222344B1 (de) 2024-06-12

Family

ID=74095618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21782980.3A Active EP4222344B1 (de) 2020-09-30 2021-09-24 Bohrsystem zum bergen von nahezu ungestörten bohrkernen aus lockerem bis festem grund

Country Status (15)

Country Link
US (1) US20230366282A1 (zh)
EP (1) EP4222344B1 (zh)
JP (1) JP2023543523A (zh)
KR (1) KR20230078704A (zh)
CN (1) CN116261621A (zh)
AR (1) AR123616A1 (zh)
AU (1) AU2021354880A1 (zh)
BR (1) BR112023005698A2 (zh)
CA (1) CA3194478A1 (zh)
CH (1) CH717907A1 (zh)
CL (1) CL2023000950A1 (zh)
MX (1) MX2023003763A (zh)
TW (1) TW202214952A (zh)
WO (1) WO2022069372A1 (zh)
ZA (1) ZA202303527B (zh)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8720270D0 (en) * 1987-08-27 1987-10-07 Dunn P Soil sampling
NL1015147C2 (nl) * 2000-05-10 2001-11-15 Eijkelkamp Agrisearch Equip Bv Grondmonsternemer.
ATE477398T1 (de) 2007-10-15 2010-08-15 Terrasond Ag Bohreinrichtung und verfahren für die entnahme von bodenproben
WO2012125454A2 (en) * 2011-03-16 2012-09-20 QCS Technologies Inc. Pressure coring assembly and method
US20120261189A1 (en) * 2011-04-14 2012-10-18 Longyear Tm, Inc. Undisturbed core sampler
US9551188B1 (en) * 2013-03-13 2017-01-24 Kejr Inc. Split tube soil sampling system
KR101544769B1 (ko) * 2015-03-09 2015-08-17 지케이엔지니어링(주) 연약 사질지반 확장형 시료채취장치
US10767431B2 (en) * 2016-03-03 2020-09-08 Halliburton Energy Services, Inc. Inner barrel crimping connection for a coring tool
CN105927175B (zh) * 2016-06-30 2018-05-25 中国石油集团西部钻探工程有限公司 锁爪悬挂式加压取心装置

Also Published As

Publication number Publication date
CH717907A1 (de) 2022-03-31
CN116261621A (zh) 2023-06-13
CA3194478A1 (en) 2022-04-07
ZA202303527B (en) 2024-04-24
AR123616A1 (es) 2022-12-21
BR112023005698A2 (pt) 2023-04-25
CL2023000950A1 (es) 2023-11-24
JP2023543523A (ja) 2023-10-16
AU2021354880A9 (en) 2024-06-20
KR20230078704A (ko) 2023-06-02
WO2022069372A1 (de) 2022-04-07
AU2021354880A1 (en) 2023-04-20
TW202214952A (zh) 2022-04-16
US20230366282A1 (en) 2023-11-16
EP4222344A1 (de) 2023-08-09
MX2023003763A (es) 2023-04-26

Similar Documents

Publication Publication Date Title
DE102008003968B3 (de) Bohranlage
DE2306397C3 (de) Vorrichtung zum bergmännischen drehenden oder drehschlagenden Bohren
DE3114612C2 (de) Bohrvorrichtung für Hartgestein
CH640304A5 (de) Bohrwerkzeug zum niederbringen von bohrloechern, insbesondere fuer eine selbstfahrende schlagmaschine.
DE2309570A1 (de) Bohrgeraet und bohrstrang-einsatzanordnung
EP0958446B1 (de) Verfahren und vorrichtung zum niederbringen von bohrlöchern, insbesondere für schürf- und gewinnungsbohrungen
EP4222344B1 (de) Bohrsystem zum bergen von nahezu ungestörten bohrkernen aus lockerem bis festem grund
DE3314689C1 (de) Vorrichtung zum Einsenken einer Erdwärme-Kollektor-Sonde in das Erdreich
DE3726306A1 (de) Vorrichtung zum festsetzen von befestigungselementen
EP4151825B1 (de) Schnellverschluss für drehende und gleichzeitig schlagende werkzeuge
DE102010033519A1 (de) Verfahren zur Einbringung einer Erdwärmesonde in ein Bohrloch und eine nach dem Verfahren arbeitende Vorrichtung
DE2903936A1 (de) Vorrichtung zur gewinnung von kernen
DE102011000320A1 (de) Bohranlage zum Durchführen von Bohrungen im Erdreich
WO2014005166A2 (de) Verfahren und vorrichtung zum ausbilden von bohrlöchern und festlegen einer verankerung in dem bohrloch
DE4318736A1 (de) Verfahren und Vorrichtung zur Entnahme von Gas- und/oder Öl- und/oder Wasser- und/oder Feststoffproben im Bohrbetrieb
DE1980712U (de) Vorrichtung zum bohren von loechern in einem von erdreich oder lockerem gestein bedeckten gebirge.
EP2878761B1 (de) Bohrkrone zum Bohren eines Baugrundes und Verfahren zum Lösen einer Bohrkrone zum Bohren eines Baugrundes von einem Rohr in abgeteuftem Zustand
DE4430874C2 (de) Verfahren zur Gewinnung von Proben für Bodenuntersuchungen
DE1188014B (de) Gesteinsbohrgeraet mit exzentrisch arbeitendem Bohrwerkzeug
DE1220360B (de) Gesteinsbohreinrichtung
DE4225806C1 (de) Bohreinsatz für ein Großlochbohrgerät
AT12096U1 (de) Bohrkrone zum bohren, insbesondere schlag- oder drehschlagbohren von löchern in boden- oder gesteinsmaterial
DE3514030A1 (de) Bohrvorrichtung, insbesondere zum rammbohren
DE3622934C2 (de) Bohrgerät kompakter Bauweise
OA21222A (en) Drilling system for recovering virtually intact drill cores from loose to solid ground.

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230418

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

INTG Intention to grant announced

Effective date: 20240424

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502021004018

Country of ref document: DE