WO2022069372A1 - 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 PDFInfo
- Publication number
- WO2022069372A1 WO2022069372A1 PCT/EP2021/076384 EP2021076384W WO2022069372A1 WO 2022069372 A1 WO2022069372 A1 WO 2022069372A1 EP 2021076384 W EP2021076384 W EP 2021076384W WO 2022069372 A1 WO2022069372 A1 WO 2022069372A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- pipe
- drill
- flushing
- pressure
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 66
- 239000007787 solid Substances 0.000 title claims description 11
- 238000011010 flushing procedure Methods 0.000 claims abstract description 107
- 238000011084 recovery Methods 0.000 claims abstract description 78
- 238000000034 method Methods 0.000 claims description 22
- 229910000639 Spring steel Inorganic materials 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 239000007858 starting material Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 7
- 229920001875 Ebonite Polymers 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002689 soil Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 8
- 230000035515 penetration Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000760 Hardened steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- Drilling system for retrieving almost undisturbed drill cores from loose to solid ground
- This drilling system relates to a method and a device for removing cores from particular loose but also from solid ground, the core samples can be recovered and stored almost undisturbed.
- a cylindrical drill core in a hollow cylindrical sleeve is removed from the ground and brought to the surface.
- Such drill cores measure, for example, about one meter in length and 10 cm to 20 cm in diameter. However, they can also be selected to be considerably larger or considerably smaller, depending on what is desired and on the corresponding dimensioning of the drilling device.
- this drill core is ejected from the hollow-cylindrical sleeve and is then freely accessible horizontally, for example on the inner shell of a half-cylinder or on a flat surface.
- the sleeve can also be equipped on the inside with a liner made of, for example, hard PVC or another suitable material that is flush with its inner wall, so that this liner is also pushed over the ground material with the boring drive with the sleeve.
- the liner is ejected from the same, with the drill core in it unchanged, just as it was underground, and it can later be opened in tranches, for example with diametrical cuts, so that the sample is then completely undisturbed.
- a liner One advantage is that after recovery from the sleeve, any volatile pollutants present in the drill core are trapped and preserved in the drill 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 condition of the soil and in particular about any pollutants that have penetrated into the soil over the course of time. In this way, reliable registers of damage can be drawn up and suitable measures for the remediation of such soils can be initiated. It is particularly interesting for agriculture to use such cadastres to gain knowledge of the soil qualities, the mineral composition of the humus soils and their nutrient richness, or to get knowledge of any soil deficiencies. Knowledge can then be gained about which soils are suitable for which crops and how fertilization should be carried out, which ultimately promotes ecological and high-yield cultivation of agricultural land. Such core drillings are also suitable for taking soil samples in old landfills, in soil suspected of being contaminated and in loose rock formations, i.e. also in fine layers of sand, in layers of peat and in sea chalk. The drilling method also works in layers of soil that are in the groundwater.
- SPT Standard Penetration Test
- ASTM ASTM Standard Penetration Test
- a thick-walled sample tube with an outside diameter of 50.8 mm and an inside diameter of 35 mm and a length of about 650 mm is used for the test. This is driven into the ground at the bottom of a borehole by impacts from a slide hammer with a mass of 63.5 kg falling a distance of 760 mm.
- the sample pipe is driven 150 mm into the ground and then the number of blows required for the pipe to penetrate every 150 mm to a depth of 450 mm is recorded.
- N Value The sum of the number of strikes required for the second and third 6-inch penetrations. The sum of the number of strikes required for the second and third 6-inch penetrations is called the “Standard Penetration Resistance” or “N Value,” which is expressed in strikes per foot (beats per foot - bpf) is specified. This value is fundamental to many of the different types of geotechnical calculations such as bearing capacity and settlement estimates. In cases where 50 hits are not sufficient to propel penetration through a 150 mm interval, penetration is recorded after 50 hits. The score gives an indication of the density of the soil and is used in many empirical geotechnical formulas.
- the drill core growing into the sinking sleeve will rotate hardly or at most only very little simply because of its connection with the subsoil.
- a locating rod to hold the sleeve in place and prevent it from rotating is therefore unnecessary. It can even have a disadvantageous effect, namely when the sleeve twists by a few angular degrees in the direction of rotation of the drill bit in certain subsoil conditions despite the non-rotatable fixing rod. Although this does not affect the quality of the drill core, when using such a fixing rod it means that it cannot absorb the resulting torsion and shears off. Then there are unplanned and long interruptions in drilling and time-consuming improvisational work in order to somehow salvage the casing.
- So-called cable core drilling methods are known in the prior art, with which drill cores can easily be recovered from solid rock or solid ground. These methods work with devices including a ratchet lock, which involves a complicated construction that is not suitable for drilling in loose ground, because these devices for recovering drill cores would break down within a very short time as a result of the ramming blows required.
- a sleeve or a core catcher cannot be passed down with ropes be pressed into a drill core that has been drilled free.
- the present invention sets itself the task of specifying a drilling system, i.e. a method and a device for taking approximately undisturbed soil samples from, in particular, loose subsoil, but equally also from solid subsoil, which drilling system exceeds the conventional methods in several is clearly superior.
- the actual drilling should thus be faster and any interruptions in drilling should be reduced to a minimum of time.
- the device should have a much longer service life than conventional drill pipe and its components offer.
- the boreholes should deliver almost undisturbed soil samples and, depending on their condition, be secured in such a way that if the material falls apart due to the consistency of the material, the informative value of the sample investigation does not suffer or only imperceptibly.
- Figure 1 A rotary hammer with drive and hammer for beating
- FIG. 2 shows the rotary hammer lying down, in a view from below
- FIG. 3 shows the rotary hammer with the drill head in the upright operating position
- FIG. 4 shows a drill head separately, with its external thread for screwing into a drill pipe
- Figure 5 The drill head according to Figure 4 in a longitudinal section, with a central axial
- Figure 6 The assembled drilling system consisting of drill head, drill pipe,
- FIG. 7 shows the assembled drilling system from FIG. 6 seen obliquely from below;
- FIG. 8 A drill pipe as an extension piece, viewed obliquely from below;
- FIG. 9 shows the drill pipe from FIG. 8 as an extension piece, viewed obliquely from above;
- FIG. 10 shows the drill bit in an enlarged representation, seen obliquely from below
- Figure 11 Assembled and from top to bottom: a pressure, flushing and
- Recovery pipe adapter (DSB adapter), followed by a pressure, flushing and recovery pipe DSB, and at the bottom of the pressure, flushing and recovery pipe DSB a sleeve or core catcher;
- Figure 12 The DSB adapter for placing on top of the pressure, flushing and
- FIG. 13 A pressure, scavenging and recovery pipe DSB as an extension piece seen diagonally from below;
- FIG. 14 shows a sleeve adapter for the impact pressure-resistant connection of the sleeve or the drill core catcher to the pressure, flushing and recovery pipe, viewed diagonally from above downwards;
- FIG. 15 shows the sleeve adapter from FIG. 14 for the impact pressure-resistant connection of the sleeve or the drill core catcher to the pressure, flushing and recovery pipe, viewed diagonally from below upwards;
- FIG. 16 shows the individual parts of the sleeve adapter from FIGS. 14 and 15 in a linear exploded drawing
- FIG. 17 A sleeve or a drill core catcher viewed obliquely from below
- FIG. 18 A sleeve or a drill core catcher viewed obliquely from above
- Figure 19 An unrolled spring retainer in the sleeve for the
- FIG. 20 The drilling head at the top, below the pressure, flushing and recovery pipe with the starting pipe at the bottom, in which the sleeve is inserted, before it is removed from the starting pipe;
- FIG. 24 shows the lower part of the sleeve adapter enlarged, with a view into the hole for the fixing bolt and the fixing bolt next to it;
- FIG. 29 The screwing of a drill pipe onto the starting pipe
- FIG. 30 A drill pipe ready to be screwed onto the starting pipe
- FIG. 34 The lower threaded section of the drill head and the DSB adapter with the pressure, flushing and rescue pipe connected below within the drill pipe in an enlarged representation;
- Figure 35 The drilling head with drive flange when lowering over the upper one
- a hammer drill with drive and hammer for percussive rotation of the drill head is shown in Figure 1, such as hammer drills are commercially available.
- the output shaft 1 protrudes below, which has a thread 3 and is rotated by a hydraulic drive 2 arranged on the side.
- the hammer drill includes 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 at 50 rpm reaches approximately 15 kNm .
- 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 for use, how the hammer drill is used, with the drill head 5 connected to the output shaft 1 at the bottom, including the thread 3 of the output shaft 1 was screwed into the drill head.
- FIG. 4 shows a drill head separately and enlarged, with its external thread for screwing into a drill pipe
- FIG. 5 shows this drill head in a longitudinal section. You can see the central axial bore 6 for flushing, the axial bore 37 with the inner wall from below and a radial bore 7 for venting.
- the figure 6 shows the assembled drilling system 4 with the top of the drill head 5 for the drive. It is screwed into an internal thread of the adjoining drill pipe 9 and can then drive and rotate it clockwise—seen from above.
- the drill pipe 9 is here with its lower external thread in addition suitable internal thread screwed into the top of the starting pipe 8. These threads are relatively coarse threads that are milled out of the pipe material. For each screwing together, which takes place with the help of the rotating drill head 5, the threads are preferably re-greased.
- the drill pipe 9 can be lengthened with one or more drill pipe sections in order to advance correspondingly deeper into the ground.
- the drill pipe sections advantageously measure about 1 meter in length.
- the starting pipe 8 carries a drill bit 10 at its lower end.
- FIG. 7 shows this assembled drilling system seen obliquely from below, while FIG. 8 shows a single drill pipe 9 seen obliquely from below.
- a relatively coarse external thread 11 is formed on this at the lower end, with which it can be screwed into a matching internal thread 12 on the next drill pipe 9, as shown in Figure 9, or with which it can be attached to the lowest pipe, i.e. at Initial pipe 8 can be screwed.
- the hammer drill drive rotates clockwise when viewed from above, i.e. in the sense of tightening these connecting threads 11, 12.
- counterclockwise drilling is also possible in the same way, but the threads used would then also have to run the other way round.
- FIG. 10 shows the drill bit 10 in an enlarged view obliquely from below.
- Drilling segments 13 offset with hard metal pins are soldered onto the drill bits at the bottom, and lateral, outer clearing elements 15 with inclined surfaces 14 ensure clearing at the top.
- the material volume, which is located axially under the drill bit segments 13 of the drill bit 10, i.e. exactly under the rotating ring that the drill bit 10 forms, is pressed partly into the drill core, partly into the surrounding ground, and a part conveyed upwards as spoil on the outside of the drill bit 10 and the starter tube 8 and the drill tube 9 .
- a shoulder 16 is formed as a radially inwardly projecting projection, on which the sleeve or the drill sample sleeve or the drill core catcher abuts, although this is not shown here.
- This sleeve ends flush with this projection on the inside.
- the drilling sleeve or the drill core catcher pulls the drill bit 10 over the exposed drill core and snugly encloses it. It is possible to use other commercially available drill bits, for Example diamond crowns or otherwise stocked.
- FIG. 11 shows, starting from below, a sleeve 17 or a drill core catcher. At the top you can then see the sleeve adapter 21, then the pressure, flushing and recovery pipe 19 with its upper pressure, flushing and recovery pipe adapter 18, on which the impacts of the ram hammer act. In the example shown, this pressure, flushing and recovery pipe 19 rotates uniformly with the starting pipe 8 and any drill pipe sections used for the drill pipe 9 (FIG. 6).
- a very special and highly essential 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 beats, the sinking sleeve 17 encloses the drill core growing into it as drilling progresses without rotating. Only the strong and high-frequency ramming impacts from the pressure, flushing and recovery pipe 19 act on the sleeve 17 and stress this sleeve adapter 21 with enormous force peaks.
- FIG. 12 shows the upper pressure, flushing and salvage pipe adapter 18 or DSB adapter of the pressure, flushing and salvage pipe 19 in an enlarged view. Flushing water runs down through the inside of the pressure, flushing and recovery pipe 19 through the axial bore with its inner wall 52 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, a circumferential ring groove 54 can be seen, into which an O-ring is inserted for sealing against the inner wall of the axial bore 37 of the drill head 5.
- FIG 13 shows a hollow pressure, flushing and recovery pipe section (DSB) 53 as a necessary extension pipe for the hollow pressure, flushing and recovery pipe 19, which is simply inserted with its lower external thread into the upper, associated internal thread of the below adjoining pressure, flushing and recovery pipe 19 is screwed.
- 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 the extension.
- FIG. 14 shows this sleeve adapter 21 for the impact pressure-resistant connection of the sleeve 17 or the drill core catcher to the pressure, flushing and recovery pipe DSB 19 in a view obliquely from above.
- a threaded stub 35 protrudes from the sleeve adapter 21 at the top, which ends in a base body 22 of the sleeve adapter at the bottom, which base body 22 forms a plate or a shoulder 44 at the top.
- a sealing ring 36 which is preferably made of hard plastic rubber and can rotate with the base body 22 , follows downwards. The rotation of the pressure, flushing and recovery pipe 19 is thus 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-positive but non-rotatable manner. Above the visible part of the lower part 24 you can see a sliding sleeve 25, the meaning of which will become clear.
- the sleeve 17 or the drill core catcher is pushed onto this lower part 24 with a precise fit from below until the sleeve 17 strikes the sliding sleeve 25 with its upper edge below.
- a pressure ring 33 made of hardened steel is also attached to the bottom of the receiving ring 23 of the adapter.
- a rubber washer 27 that projects slightly radially beyond the lower part 24 for sealing 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 slightly radially protruding rubber washer 27 for sealing the sleeve adapter 21 against the inner wall of the sleeve 17 is braced with a steel washer 29 and here four axial screws 31 with the lower part 24 .
- FIG. 16 shows this sleeve adapter 21 in an exploded view with the parts exploded along its central axis.
- the base body 22 of the adapter 21 intended for rotation, followed by the sealing ring 36, the plastic hard rubber ring for sealing against the starting pipe 8.
- This then comes to rest on the receiving ring 23 shown underneath.
- This receiving ring 23 is stationary during operation, i.e. does not rotate, and it merges into a tapered section at the bottom and this has radial bores 41 all around, into which cylindrical pins 32 fit, which are shown below for the lower part 24 and whose function is immediately clear will.
- a circlip 26 is shown as a locking ring, which comes to rest in the annular groove 45 on the base body 22 during assembly. From below, this lower part 24 of the sleeve adapter 21, which is also stationary, is pushed over this tapered part of the receiving ring 23 and then the cylindrical pins 32 drawn in all around are inserted from the outside into the radial bores 42 on the lower part 24 as well as into the radial bores 41 on the receiving ring, which are then aligned 23 pressed, so that these two parts 23, 24 are rotatably connected to each other. After these cylinder pins 32 have been inserted, the sliding sleeve 25 is pushed over this tapered lower part of the receiving ring 23 while covering and thus securing these cylinder pins 32 .
- the retaining ring 26 is then inserted into the annular groove 45 at the lower end of the Base body 22 used so that it is secured with the receiving ring 23 in the axial direction on the base body 22 is seated.
- the lower part 24 of the adapter 21 has a diametral bore 43 for receiving a fixing bolt, not shown. At right angles to this diametral bore 43, there are two further radial bores 38 lying on a common axis, into which securing bolts 34 are inserted in order to secure the fixing bolt used.
- These two safety bolts 34 each have a pressure-loaded ball 40 at the front, which engages in a longitudinal groove on the fixing bolt used and engages, for example, halfway along the groove in a depression 56 and thus secures it.
- the safety bolts 34 are each secured by means of a circlip 39 after they have been pushed into the bores 38 .
- fixing bolt in the bore 43 flows from above through the hollow pressure, flushing and salvage pipe 19 down flushing water to the outside, as will become clear.
- This flushing water first flows 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 end faces and thus outwards.
- the pressure ring 33 takes over the existing axial forces of the sliding sleeve 25 and distributes them evenly to the receiving ring 23, which is made of aluminum bronze.
- the rubber disk 27 and the somewhat 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 sleeve 17 shows the sleeve 17 or the drill core catcher seen obliquely from below.
- the sleeve 17 is equipped on its inside with a number of spring steel elements 20 distributed around its circumference, which in this case project upwards in an arc and towards the central axis of the sleeve 17 .
- FIG. 18 shows the sleeve 17 or the drill core catcher seen obliquely from above and here it can be seen that there are two diametrically aligned bores 46 which are introduced into the sleeve 17 in the upper edge region.
- these two bores 46 come to rest over the radial bores 43 in the lower part 24, so that the flushing water, which flows out of the end faces of the fixing bolt used there, flows from the inside of the adapter 21 finally penetrates to the outside, and through these aligned bores 46 in the upper area of the sleeve 17 to the outside.
- This flushing water takes on several functions.
- the sleeve adapter 21 which is heated due to the sliding friction between the rotating base body 22, the plastic hard rubber slide ring 36 and the stationary receiving ring 23 and lower part 24, as well as due to the ramming impacts. It also lubricates between the outside of the non-rotatable sleeve 17 and the inside of the starting tube 8 rotating around the sleeve, and finally it conveys spoil from underneath the drill bit 10 radially outwards and then on the outside of the starting tube 8 upwards. The borehole is thus continuously flushed and the start pipe 8 is also lubricated and cooled on the outside. Depending on the conditions, however, it is also possible to drill dry.
- Figure 20 first shows the exposed starting pipe 8 with the sleeve 17 located therein and the hollow pressure, flushing and recovery pipe 19 screwed onto it by means of the sleeve adapter 21.
- the drill head 5 which here has a flange 47 is set in rotation by the hydraulic drill drive of the hammer drill 2 .
- drill pipe sections can be used as extension pipes for the drill pipe 9 between this drill head 5 and the lowest section, the starting pipe 8, depending on the desired drilling depth.
- the drill head 5 is screwed directly onto the starting pipe 8 at the beginning. Then it is drilled until the starting pipe 8 is almost drilled into the ground. Then the drill head 5 is unscrewed from the starting pipe 8 by a counter-rotation.
- the fixing bolt 48 is knocked out of the bore 43 in the lower part 24 of the sleeve adapter 21 or pulled out or pushed out, as has already been done in the view shown. Only the empty diametric bore 43 on the lower part 24 of the sleeve adapter 21 is visible here.
- Securing bolts 34 are inserted in two bores 38 made at right angles to the bore 43 and have at the front a ball 40 which is pressure-loaded by means of a compression spring, as can be seen in FIG.
- the fixing bolt 48 is against the resistance of these pressure-loaded balls 40 at the front knocked the safety bolt 34 out of the diametral bore 43, as is clear from FIG.
- the figure 24 shows the lower part 24 of the sleeve adapter 21 enlarged with a view into the diametral 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 fixing bolt 48 has a central transverse bore 49 which communicates with an axial bore 55 .
- These bores 49, 55 serve to guide the flushing water, which enters the sleeve adapter 21 from above through the axial bore 51 through the transverse bore 49 into the fixing bolt 48 and is then guided outwards in this along the axial bore 55 from its end faces.
- On the sleeve 17 in FIG. 25 one can still see one of the bores 46, into which the fixing bolt 48 previously engaged and held it, through which the flushing water emerges.
- the sleeve 17 or the core catcher was brought to the surface in a horizontal position and the inner core was carefully pushed mechanically or hydraulically with a piston out of the sleeve 17 onto a kannel-shaped core carrier, this core is almost undisturbed.
- the empty sleeve 17 can be used again immediately for the removal of a next drill core, or an empty sleeve 17 lying ready can be used again immediately.
- a liner can be inserted into the sleeve 17, which then lines the sleeve 17 on the inside and into which a drill core grows. In this case, the salvaged drill core is pushed out of the sleeve 17 together with the liner and is then absolutely intact like a Mettwurst.
- Individual slices can be cut off in tranches in order to structure of the drill core and how it changes throughout its length. If a sleeve 17 together with the drill core is brought to the surface during the process, after the sleeve 17 has been separated from the sleeve adapter 21, an empty sleeve 17 can be connected to the sleeve adapter 21 immediately and without any delay and this can immediately be lowered back into the starting pipe 8 in the borehole and thus drilling can continue without having to interrupt the drilling work as a result of removing cores from the salvaged sleeve 17 .
- Figure 25 shows how the sleeve adapter 21 is connected to an empty sleeve 17 by being lowered 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 used and the sleeve 17 is ready to be lowered into the initial pipe 8 with the pressure, flushing and recovery pipe 19.
- This lowering is shown in FIG.
- a drill pipe 9 as an extension pipe is placed over the pressure, flushing and recovery pipe 19 and lowered onto the initial pipe 8, as shown in FIG.
- FIG. 30 the situation according to FIG. 30 arises.
- the pressure, flushing and recovery pipe adapter 18 of the pressure, flushing and recovery pipe 19 is plugged in or screwed on, and then, from the situation as shown in FIG screwed onto the drive flange 47, as shown in FIG. The details of this are shown in FIGS. 34 to 36.
- the pressure, flushing and salvage pipe 19 rightly bears its name.
- the hard ramming impacts on the pressure, flushing and salvage pipe 19 are transferred reliably and directly from the sleeve adapter 21 to the sleeve 17 or the drill core catcher. This is thus pressed down with the same pressure as the drill bit 10, which ensures that the sleeve 17 is continuously drilled over the exposed drill core.
- the pressure, flushing and salvage pipe 19 therefore firstly fulfills a pressure function.
- flushing water can be pumped down through the pressure, flushing and recovery pipe 19 and this is conducted outwards through the sleeve adapter 21, i.e. first axially through the pressure, flushing and recovery pipe 19, then axially through the sleeve adapter 21 and finally radially, ie in the axial direction, through the diametrically inserted fixing bolt 48 to its two end faces and then through the bore 46 on the sleeve 17 to the outside.
- the pressure, flushing and recovery pipe 19 therefore also has a flushing function.
- the sleeve 17 with the drill core located therein is salvaged after releasing the drill head 5 using the pressure, flushing and salvage pipe 19 .
- the pressure, flushing and recovery pipe 19 also has a recovery function. It integrally combines these three important functions.
- the pressure, flushing and salvage pipe 19 rotates with the drill head 5 and the drill pipe 9 and the sleeve adapter 21 mediates to the non-rotating or non-rotating sleeve 17 by having two axially consecutive parts that are rotatable against each other.
- a sealing ring 36 made of hard plastic rubber is preferably arranged between the axially consecutive parts.
- a turntable body constructed similarly to this sleeve adapter - henceforth referred to as a drill head adapter - is screwed in an alternative embodiment with its threaded stump into the bore in the drill head 5, which has an internal thread for this purpose, the upper part of this turntable Body or drill head adapter with the drill head 5, while the lower, relative to the upper part rotatable part remains stationary.
- the lower part of the sleeve adapter 21 already presented it is connected to the now upper end of the rotating, flushing and recovery tube 19, with a fixing bolt, which then does not require an axial bore, but only a transverse bore to allow the flushing water down.
- the pressure, flushing and salvage pipe 19 is then screwed to just a lower part of a sleeve adapter 21, for which purpose this lower part forms a threaded stump at the top and the rotating, flushing and salvage pipe 19 has an associated internal thread at the bottom.
- the lower part of the sleeve adapter 21 is connected to the sleeve 17, as already presented, via the fixing bolt 48 with its axial bore 55. 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 tube 19 performs the three functions mentioned above, namely firstly applying pressure to the sleeve 17, secondly flushing and thus cooling, and thirdly recovering the sleeve 17 when it is filled is, that is, to pull them up into the light of day. And despite the fact that the pressure, flushing and recovery pipe 19 does not rotate in this embodiment, if the sleeve 17 rotates a few angular degrees over a drill core during drilling, it can also rotate and the drill head adapter as a In this case, the rotary disk body at the top with its two axially consecutive parts that can be rotated relative to one another mediates to the rotating drill head 5.
- 26 circlip preferably DIN 471 -65 x 2.5
- spring washers preferably DIN 128 - A8 31 Screw, preferably hexagon screw with thread up to head ISO 4017 - M8 x 20
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2021354880A AU2021354880A1 (en) | 2020-09-30 | 2021-09-24 | Drilling system for recovering virtually intact drill cores from loose to solid ground |
EP21782980.3A EP4222344A1 (de) | 2020-09-30 | 2021-09-24 | Bohrsystem zum bergen von nahezu ungestörten bohrkernen aus lockerem bis festem grund |
KR1020237012901A KR20230078704A (ko) | 2020-09-30 | 2021-09-24 | 이완된 지반 내지 견고한 지반으로부터 사실상 온전한 코어들을 회수하기 위한 시추 시스템 |
MX2023003763A MX2023003763A (es) | 2020-09-30 | 2021-09-24 | Sistema de perforacion para recuperar nucleos de perforacion casi inalterados de suelos sueltos a solidos. |
BR112023005698A BR112023005698A2 (pt) | 2020-09-30 | 2021-09-24 | Método para perfuração de núcleo em terreno solto a sólido e para obter amostras do mesmo e dispositivo para realizar o método |
US18/029,218 US20230366282A1 (en) | 2020-09-30 | 2021-09-24 | Drilling System for Recovering Nearly Undisturbed Cores From Loose to Solid Ground |
JP2023520013A JP2023543523A (ja) | 2020-09-30 | 2021-09-24 | 緩んだ地盤から固い地盤までほぼ元の状態のコアを回収するための掘削システム |
CA3194478A CA3194478A1 (en) | 2020-09-30 | 2021-09-24 | Drilling system for recovering virtually intact drill cores from loose to solid ground |
CN202180067475.0A CN116261621A (zh) | 2020-09-30 | 2021-09-24 | 用于从松散地至坚实地回收几乎不受干扰的芯的钻探系统 |
ZA2023/03527A ZA202303527B (en) | 2020-09-30 | 2023-03-13 | Drilling system for recovering virtually intact drill cores from loose to solid ground |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01240/20 | 2020-09-30 | ||
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. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022069372A1 true WO2022069372A1 (de) | 2022-04-07 |
Family
ID=74095618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/076384 WO2022069372A1 (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 (de) |
EP (1) | EP4222344A1 (de) |
JP (1) | JP2023543523A (de) |
KR (1) | KR20230078704A (de) |
CN (1) | CN116261621A (de) |
AR (1) | AR123616A1 (de) |
AU (1) | AU2021354880A1 (de) |
BR (1) | BR112023005698A2 (de) |
CA (1) | CA3194478A1 (de) |
CH (1) | CH717907A1 (de) |
CL (1) | CL2023000950A1 (de) |
MX (1) | MX2023003763A (de) |
TW (1) | TW202214952A (de) |
WO (1) | WO2022069372A1 (de) |
ZA (1) | ZA202303527B (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3879045T2 (de) * | 1987-08-27 | 1993-09-16 | Peter Dunn | Bodenprobennehmer. |
EP2050923A1 (de) | 2007-10-15 | 2009-04-22 | TerraSond AG | Bohreinrichtung und Verfahren für die Entnahme von Bodenproben |
KR101544769B1 (ko) * | 2015-03-09 | 2015-08-17 | 지케이엔지니어링(주) | 연약 사질지반 확장형 시료채취장치 |
CN105927175A (zh) * | 2016-06-30 | 2016-09-07 | 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 |
US9551188B1 (en) * | 2013-03-13 | 2017-01-24 | Kejr Inc. | Split tube soil sampling system |
DE112016005721T5 (de) * | 2016-03-03 | 2018-09-13 | Halliburton Energy Services, Inc. | Innenrohr-crimpverbindung für ein kernbohrungswerkzeug |
-
2020
- 2020-09-30 CH CH01240/20A patent/CH717907A1/de not_active Application Discontinuation
-
2021
- 2021-09-14 TW TW110134162A patent/TW202214952A/zh unknown
- 2021-09-24 BR BR112023005698A patent/BR112023005698A2/pt unknown
- 2021-09-24 US US18/029,218 patent/US20230366282A1/en active Pending
- 2021-09-24 MX MX2023003763A patent/MX2023003763A/es unknown
- 2021-09-24 JP JP2023520013A patent/JP2023543523A/ja active Pending
- 2021-09-24 KR KR1020237012901A patent/KR20230078704A/ko unknown
- 2021-09-24 WO PCT/EP2021/076384 patent/WO2022069372A1/de active Application Filing
- 2021-09-24 EP EP21782980.3A patent/EP4222344A1/de active Pending
- 2021-09-24 CA CA3194478A patent/CA3194478A1/en active Pending
- 2021-09-24 AU AU2021354880A patent/AU2021354880A1/en active Pending
- 2021-09-24 CN CN202180067475.0A patent/CN116261621A/zh active Pending
- 2021-09-27 AR ARP210102678A patent/AR123616A1/es unknown
-
2023
- 2023-03-13 ZA ZA2023/03527A patent/ZA202303527B/en unknown
- 2023-03-30 CL CL2023000950A patent/CL2023000950A1/es unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3879045T2 (de) * | 1987-08-27 | 1993-09-16 | Peter Dunn | Bodenprobennehmer. |
EP2050923A1 (de) | 2007-10-15 | 2009-04-22 | TerraSond AG | Bohreinrichtung und Verfahren für die Entnahme von Bodenproben |
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 |
DE112016005721T5 (de) * | 2016-03-03 | 2018-09-13 | Halliburton Energy Services, Inc. | Innenrohr-crimpverbindung für ein kernbohrungswerkzeug |
CN105927175A (zh) * | 2016-06-30 | 2016-09-07 | 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 |
---|---|
TW202214952A (zh) | 2022-04-16 |
US20230366282A1 (en) | 2023-11-16 |
CN116261621A (zh) | 2023-06-13 |
AR123616A1 (es) | 2022-12-21 |
EP4222344A1 (de) | 2023-08-09 |
JP2023543523A (ja) | 2023-10-16 |
KR20230078704A (ko) | 2023-06-02 |
CL2023000950A1 (es) | 2023-11-24 |
CA3194478A1 (en) | 2022-04-07 |
CH717907A1 (de) | 2022-03-31 |
ZA202303527B (en) | 2024-04-24 |
AU2021354880A1 (en) | 2023-04-20 |
MX2023003763A (es) | 2023-04-26 |
BR112023005698A2 (pt) | 2023-04-25 |
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