EP0883731B1 - Kernbohrwerkzeug - Google Patents

Kernbohrwerkzeug Download PDF

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Publication number
EP0883731B1
EP0883731B1 EP97900510A EP97900510A EP0883731B1 EP 0883731 B1 EP0883731 B1 EP 0883731B1 EP 97900510 A EP97900510 A EP 97900510A EP 97900510 A EP97900510 A EP 97900510A EP 0883731 B1 EP0883731 B1 EP 0883731B1
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EP
European Patent Office
Prior art keywords
core
longitudinal channel
fluid
coring
barrel
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.)
Expired - Lifetime
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EP97900510A
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English (en)
French (fr)
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EP0883731A1 (de
Inventor
Philippe Fanuel
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Baroid Technology Inc
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Baroid Technology Inc
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Publication of EP0883731A1 publication Critical patent/EP0883731A1/de
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • 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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/06—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver having a flexible liner or inflatable retaining means

Definitions

  • the annular space between the tubes inside and outside is usually used to channel a coring fluid to the internal space of the tube inside and / or to crown nozzles.
  • US Patent 2,658,726 describes a core barrel with three coaxial tubes in which a valve can prevent the coring fluid from entering the space inner tube and let out fluid of this internal space to mix with the normal flow coring fluid
  • US-A-2,147,896 describes a Corer with three coaxial tubes, the innermost of which is closed at its posterior end to take press on the carrot that enters, to form a temporary plug for the anterior end of the corer and to keep away from the start of the carrot the means intended to seize the carrot for the shoot from the hole.
  • passage means arranged to send towards the internal space, at the anterior end of it, a fluid of coring leaving the anterior end of said second longitudinal channel.
  • the said passage means are arranged to put directly in fluid communication the end anterior of the second longitudinal canal with a annular gap formed between the crown and a carrot during coring and, through this gap, with said internal space at its end earlier.
  • the anterior end of the second longitudinal channel is at least partially closed relative to an annular gap formed between the crown and a carrot during coring, and passages between the second longitudinal channel and internal space are arranged close to their respective anterior ends, these passages being preferably regularly distributed around the axis longitudinal of the core barrel.
  • Figure 1 shows schematically in longitudinal section, broken, one end anterior core barrel according to one embodiment of the invention.
  • Figure 2 shows schematically in longitudinal section, with broken edges, the core barrel of the FIG. 1, at the location of the connection of the inner tubes, median and external and means of realization and aforementioned selective blocking.
  • Figure 3 shows schematically in longitudinal section, broken, one end anterior of a core barrel following another form of realization of the invention.
  • Figure 4 shows schematically in longitudinal section, with broken edges, the core barrel of the FIG. 3 at the location of the connection of the inner tubes, middle and outside and that of the means of realization and selective blocking above.
  • Figure 5 shows schematically in longitudinal section, broken, anterior end of a corer following yet another form of realization of the invention, the corer being ready for coring.
  • Figure 6 is a representation practically similar to that of Figure 5 but the core barrel is shown there during coring.
  • Figure 7 shows schematically in longitudinal section, with broken edges, the core barrel Figures 5 and 6 at the location of the tube connection interior, median and exterior and that of the means of realization and selective blocking above.
  • Figure 8 shows schematically in longitudinal cut, with broken, another form of connection between the inner and middle tubes of the core barrel according to the invention as that of the connection of the figure 2.
  • Figure 9 shows schematically in longitudinal section, broken, one end anterior core barrel according to one embodiment particular of the invention, in which the middle and inner tubes form a constitutive whole movable in the outer tube.
  • Figure 10 shows schematically in longitudinal section, with broken lines, the connection point middle and inner tubes of the core barrel of the figure 9.
  • the core barrel 1 ( Figures 1 and 2) of the invention, intended in particular for oil exploration, includes a core bit 2, a tube exterior 3, which can be formed of several sections 4, screwed into each other and to the crown 2, and which is used inter alia for the rotation drive of this last, and an inner tube 5, which can also be composed of several sections 6 to receive a core 7 in its internal space 8 during coring.
  • the inner 5 and outer 3 tubes are substantially coaxial.
  • the inner tube 5 comprises for example, at its anterior end 9 (considering the meaning in advance of the core barrel 1 during the cutting of a carrot 7), a known system 10 with a frustoconical ring split 11 to hold a carrot 7 near its base in the internal space 8 during a rise of the tube inside 5 or core 1 towards the surface.
  • the core barrel 1 of the invention comprises plus a median tube 15 arranged coaxially between the inner 5 and outer 3 tubes and delimiting with this last a first longitudinal channel 16 annular for a coring fluid and, with the inner tube 5, a second longitudinal channel 17 for a coring fluid.
  • the first longitudinal channel 16 has a front end 16A close to the crown 2 and a posterior end 16B distant from the crown 2.
  • the second longitudinal channel 17 has one end anterior 17A and a posterior 17B and space internal 8 has an anterior end 8A and a posterior end 8B.
  • the core barrel 1 of the invention comprises in in addition to means 18 which selectively produce and / or block, at least temporarily, preferably from controlled way, coring fluid communication between the posterior end 17B of the second channel longitudinal 17 and / or that 16B of the first longitudinal channel 16 and / or that 8B of the internal space 8.
  • the middle tube 15 can also be formed by several sections 19 for example welded or screwed to one another.
  • the means 18 are arranged so as to allow, for a fluid to core drilling, constant communication between the ends posterior 8B and 17B, through conduits, for example axial 20 and radial 21.
  • a communication that can be ordered can be made between these two posterior ends 8B and 17B and the rear end 16B by the means 18, for example using the axial duct 20, a valve 22, an axial conduit 23 and conduits divergent and radial 24.
  • the valve 22 can be a ball 25 applied to an appropriate seat 26.
  • the valve 22 may possibly include a spring (not shown), adjustable or not, to produce an effect of selective pressure regulation between upstream and downstream of valve 22.
  • the selective means 18 are arranged to connect at least temporarily fluid a conduit 27 for supplying a fluid coring from a tank (not shown) at the soil surface and nozzles 28 (Figure 1) of the crown 2, via the first longitudinal channel 16 and, for example, the axial duct 23 and divergent and radial conduits 24.
  • the selective means 18 can be arranged, as shown in Figure 2, for at least temporarily connect fluid the posterior end 8B of the internal space 8 and the coring fluid supply conduit 27 when the ball 25 is for example absent or away from the valve seat 26 and, if necessary, to interrupt selectively this fluid communication in placing the ball 25 on the valve seat 26.
  • the ball 25 can be arranged so as to block a flow of fluid from the conduit 27 to the internal space 8 and so as to possibly allow reverse flow, if also possibly towards the first longitudinal channel 16.
  • the anterior end 17A of the second longitudinal channel 17 can be in communication coring fluid with a gap annular 29 between a core 7 and the crown 2 and by this with a bottom of hole 31 during the coring.
  • core barrel 1 of Figures 1 and 2 can be used as follows.
  • the ball 25 When it is judged that the internal space 8 is released, the ball 25 is thrown into the conduit inlet 27 (or released from its storage location) and, carried away by the coring fluid, it ends on valve seat 26 to block communication fluid from the supply line 27 to the internal space 8 and towards the second longitudinal channel 17. Then all the coring fluid from the supply duct 27 is transmitted to the nozzles 28 by the first longitudinal channel 16. As a result of blockage given by the ball 25, the top of the carrot 7 which gradually enters the internal space 8 is no longer subject to the pressure of the coring fluid such that it is established in the supply duct 27.
  • the core fluid included in the space internal 8, above the core 7 can be pushed back by carrot 7 as it enters this internal space 8 because this coring fluid can escape through the axial 20 and radial 21 conduits towards the second longitudinal channel 17 and from there to the gap annular 29 and the bottom of the hole 31 where, depending pressure losses known in the core barrel 1, the coring fluid is usually at a pressure lower than that prevailing in the supply duct 27.
  • the core 7 is subjected everywhere to a pressure less than that of the coring fluid in the supply duct 27 and it is therefore practically not subject to a compaction which, moreover, could rub excessively against the wall of the tube interior 5, for example in the case of a little material consolidated.
  • the coring fluid which must escape from internal space 8 towards the gap ring finger 29 is blocked for some reason from the radial conduits 21, it can escape by the axial conduits 20 and 23 to the first longitudinal channel 16, for example from the moment when its pressure overcomes the pressure applied to the ball 25 by the coring fluid in the supply duct 27.
  • the aforementioned spring (not shown) can be arranged to modify the pressure threshold to overcome.
  • the core barrel 1 can have ( Figure 3) a constricted passage 42, possibly adjustable, between the front end 17A of the second longitudinal channel 17 and annular gap 29 above, for the communication of core fluid to the bottom of core hole 31.
  • the inner tube 5 can for example having two coaxial circular walls 43, 44 delimiting an annular chamber 45 closed at its axially opposite ends 46, 47, for example each time by a thickening of the wall 43 and by an O-ring between these two walls 43, 44, the more internal 43 is relatively thin compared to the more external 44.
  • the annular chamber 45 can be in fluid communication with the second longitudinal channel 17 via one or more radial passages 48.
  • This other embodiment of the core barrel 1 according to Figures 3 and 4 can be used as following.
  • the ball 37 closes the valve seat 38 so as to prevent direct flow of core fluid from the supply duct 27 towards the rear end 8B of the internal space 8 and therefore in it.
  • the coring fluid discharged to the top of this internal space 8 through the core 7 can escape from this posterior end 8B, as soon as its pressure overcomes the pressure on the ball 37, and it can then flow into the intermediate space 34 and from there for example, by the off-center line (s) 35, towards the second longitudinal channel 17 and / or, by the off-axis conduits 33 and the axial conduit 23, towards the supply duct 27 or rather towards the duct (s) obliques 36 and then towards the first longitudinal channel 16 and the adjustments 28.
  • the core 7 is not not subjected, on the side of its top, to a pressure higher than that of the coring fluid.
  • the ball 39 is for example sent in the supply duct 27 and, carried away by the fluid coring, it ends up on the valve seat 40 of way to at least greatly reduce or even block the flow of the coring fluid towards the oblique conduits 36 and therefore towards the first channel longitudinal 16 and nozzles 28 which no longer need to be fed at this time, the actual core drilling being finished.
  • This fluid exhaust blockage core drilling can lead to a known increase sensitive to the pressure of the coring fluid, among others in the second longitudinal channel 17 and so in the annular chamber 45, so as to obtain towards the interior of the internal space 8 a deformation of the thin wall 43 which then encloses the core 7 for keep it in this internal space 8 and take it out of the bottom of hole 31.
  • the wall thin 43 can constitute a sleeve mounted so sliding in the thick wall 44 and present a external frusto-conical part 50 pointing towards the end anterior of the core barrel 1, provided with at least one notch longitudinal and cooperating with a frustoconical part internal 51 corresponding, for example of the wall 44.
  • the thin wall 43 already enclosing according to a certain degree the carrot 7, can be driven towards this anterior end of the corer 1 and cause by this an additional tightening of the frustoconical part external 50 against the carrot 7 by the action of the part internal frustoconical 51.
  • the piston 54 is pushed into the internal space 8 as the carrot 7 enters it.
  • the coring fluid is expelled from the internal space 8 by the piston 54 in the radial conduits 53 and from there into the second channel longitudinal 17 to escape for example somewhat above the base of carrot 7 when the second longitudinal channel 17 comprises (as in the case of the Figure 1) a front end 17A opening to the location of the front end 9 of the inner tube 5, substantially around the periphery of the latter.
  • Corer 1 shown in Figures 5 and 6, it can be provided on the end 54A of the piston 54 facing the carrot 7, a pusher 56 arranged to bear, at start of coring, on the bottom 3 of the coring hole and then on top of carrot 7 being training.
  • the pusher 56 can also form only one part with piston 54.
  • the piston 54 or, according to FIGS. 5 and 6, the pusher 56 comprises, at the place of its end intended to cooperate with the top of the core 7, a filling port 57 and, connected thereto, a line 58 through pusher 56 and / or piston 54 up to the internal space 8.
  • a non-return valve 59 is advantageously installed in line 58 or at the place of the filling orifice 57.
  • the piston 54 is arranged in the above starting position (figure 5).
  • a fluid of coring is injected through the filling orifice 57 and through the conduit 58 in the internal space 8 and preferably until the fluid leaves the radial channels 53 (figure 7) and flows down from the corer 1 through the second longitudinal channel 17 (Figure 5).
  • the actual core drilling is started.
  • the pusher 56 pushed by the bottom of the hole 31 and then by the carrot 7 which enters the corer 1, pushes the piston 54 in the internal space 8.
  • the fluid coring driven up this internal space 8 escapes through the radial conduits 53 to the second longitudinal channel 17 and therefrom through passages 55 from which the coring fluid is distributed in an annular gap between the wall of the tube interior 5 and carrot 7 to cover the latter as it enters the internal space 8.
  • the push-button 56 advantageously exceeds the corer 1 so as to give access to the orifice of filling 57 arranged laterally.
  • the piston 54 may include seals O-ring seal 60 cooperating with the wall of the tube interior 5, if we want to avoid direct fluid from internal space 8 to the top carrot 7.
  • the coring injected into the internal space 8 can be different from that which comes from the aforementioned tank by through the supply duct 27.
  • the fluid different can be a protective fluid the carrot 7 or a fluid capable of lubricating the sliding of the carrot 7 in the inner tube 5, known to man business.
  • the radial conduits 21 (figure 2) and / or 53 (figure 7) can constitute a choked passage of the coring fluid which goes from the internal space 8 towards the second longitudinal channel 17.
  • Adjustment means known to those skilled in the art (spring valve, etc.), can be added to these ducts to be able to adjust the passage, for example so as to subject the core 7 to a selected pressure which helps maintain its structural stability.
  • a safety valve 61 ( Figure 7) and / or pressure relief means such as a screw 62 can be arranged so that they can escape for example internal space 8 and / or the second channel longitudinal 17 of the fluid which is pressurized therein following the insertion of the carrot 7 into this internal space 8 and which is kept under pressure at the following a blockage of the ducts intended for evacuation of this pressure.
  • the safety valve 61 can act during the coring and lets escape, in if necessary, fluid from the internal space 8 towards the first longitudinal channel 16.
  • the inner tubes 5 and median 15 can, together, rotate or not around their common longitudinal axis, regardless of a rotation of the outer tube 3.
  • Figure 8 shows an embodiment in which the inner tubes 5, median 15 and outside 3 can independently rotate any of the other around their common longitudinal axis.
  • a screw 70 fixed in a threaded hole of the end posterior of the inner tube 5 is mounted on a ring 71 arranged between two thrust ball bearings 72, 73 which are mounted on a shaft 74 carried by a appropriate fitting 75 which is mounted in the outer tube 3 as is the connector 63 of the figure 7.
  • the constituent assembly 80 includes known fastening means 81 arranged at its end furthest from the front end 9 of the tube interior 5.
  • a core barrel 1 of the kind depicted in Figures 9 and 10 can be part of the so-called "wire" type line ".
  • all component 80 is held in the stop position at means of the pressure of the coring fluid applied to its exposed surfaces.
  • the selective means 18 of the core barrel 1 of the Figure 10 have an annular boss 82 arranged on the inner wall 83 of the outer tube 3 and at least one outlet 84, such as that of the oblique duct 36 opening into the first longitudinal channel 16.
  • the annular boss 82 In coring position, the constituent assembly 80 being with stop at the front end in the outer tube 3, the annular boss 82 is outside of a flow liquid from outlet 84 in the first longitudinal channel 16.
  • the constituent assembly 80 can deviate from the stop position, for example because it gets stuck at a certain level of the carrot 7 while the crown 2 continues to progress. Such a blockage may result from the fact that the inner tube 5 is stuck around the carrot 7 or that of the liquid accumulated between the core 7 and the bottom of the tube interior 5 cannot escape.
  • the annular boss 82 and the orifice 84 are gradually disposing of one facing each other so as to restrict to an extent wanted the liquid flow from the orifice of exit 84 towards the longitudinal channel 16.
  • This restriction flow can be almost total or at less than enough to cause an increase in core fluid pressure, this increase can be interpreted as a signal from a blocking of the penetration of the carrot 7 in the tube interior 5.
  • the tube median 15 can be in leaktight support, on the end side anterior 16A, against a bearing surface of the crown 2 or possibly the outer tube 3, of so as to close the first longitudinal channel 16 there.
  • Figure 9 shows, without limitation the corer 1 in a case with circular walls coaxial thin 43 and thick 44.
  • a valve 85 allows you to choose, by adjusting the sound spring, the fluid pressure from which this can pass from the supply duct 27 to the second longitudinal channel 17, via a coaxial conduit 86 and radial conduits 87, in order to deform, as explained above, the thin wall 43.
  • a slight passage of fluid may be desired between the inner 5 and middle 15 tubes of the Figure 9, at their anterior end.
  • an inlet 90 for injecting either this fluid or compressed air in order to push the piston 54 back into position of departure.
  • a plug 91 is removed from this input 90 and is placed in an output 92 to prevent leakage through the valve 61.
  • the plug 91 is removed from exit 92 and put back into entry 90 to avoid a leak, not controlled by the valve 61, of the fluid included in the inner tube 5.
  • plug 91 can again be moved from inlet 90 to outlet 92 and a fluid suitable (compressed air, etc.) can be injected to push the piston 54 and thus drive out a carrot 7 housed in the inner tube 5, for example after having disassembled ( Figure 9) a section of the latter which includes the thin wall 43, if the latter is used.
  • a fluid suitable compressed air, etc.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
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  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (16)

  1. Kembohrwerkzeug, umfassend:
    eine Kernbohrkrone (2),
    eine äußere Röhre (3) zum Rotationsantrieb der Kernbohrkrone (2), und
    eine innere Röhre (5) zur Aufnahme eines Bohrkerns (7) in seinem Innenraum (8) während des Kernbohrens, wobei die innere Röhre (5) und die äußere Röhre (3) genau koaxial angeordnet sind,
    eine mittlere Röhre (15), die zwischen der inneren Röhre (5) und der äußeren Röhre (3) koaxial angeordnet ist und einerseits mit der äußeren Röhre (3) einen ersten Längskanal (16) für ein Kernbohrfluid begrenzt und andererseits mit der inneren Röhre (5) einen zweiten Längskanal (17) für ein Kembohrfluid begrenzt, wobei die Längskanäle (16,17) und der Innenraum (8) jeweils einen vorderen Bereich (16A, 17A, 8A) aufweisen, der sich nahe der Kernbohrkrone (2) befindet sowie einen hinteren Bereich (16B, 17B, 8B), der von dieser Krone (2) entfernt ist, und
    Mittel (18), die wenigstens zeitweise eine Verbindung des Kernbohrfluids zwischen dem hinteren Bereich (17B) des zweiten Längskanals (17) und/oder dem hinteren Bereich (16B) des ersten Längskanals (16) und/oder dem hinteren Bereich (8b) des Innenraums (8) selektiv gewährleisten und/oder blockieren,
    dadurch gekennzeichnet, dass das Kernbohrwerkzeug Durchlassmittel (42, 48, 55) umfasst, die angeordnet sind, um in Richtung des Innenraums (8) auf Höhe dessen vorderen Bereichs (8A) ein Kembohrfluid zu schicken, das das vordere Ende (17A) des zweiten Längskanals (17) verläßt.
  2. Kernbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Durchlassmittel so angeordnet sind, dass eine direkte Fluidverbindung zwischen dem vorderen Bereich (17A) des zweiten Längskanals (17) und einem Kreisspalt (29) hergestellt wird, der zwischen der Krone (2) und einem Bohrkern (7) während des Kernbohrens gebildet wird, sowie über diesen Spalt (29) mit dem Innenraum (8) auf Höhe dessen vorderen Bereichs (8A).
  3. Kernbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Durchlassmittel mindestens einen sich verengenden Durchlass (42) umfassen, der gegebenenfalls regelbar ist, und der sich für eine Fluidverbindung zwischen dem vorderen Bereich (17A) des zweiten Längskanals (17) und dem Ringspalt (29) erstreckt.
  4. Kernbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass
    die Innenröhre (5) an ihrem hinteren Bereich (9) zwei koaxiale Ringwände (43,44) aufweist, die eine an ihren beiden axial entgegengesetzten Enden (46, 47) geschlosse Ringkammer (45) begrenzen, wobei die weiter innen gelegene Wand (43) relativ dünn ist im Vergleich zu der weiter außen gelegenen Wand (44), und
    die Durchlassmittel mindestens einen radialen Durchlass (48) umfassen, der eine Fluidverbindung zwischen der Ringkammer (45) mit dem vorderen Bereich (17A) des zweiten Längskanals (17) gewährleistet.
  5. Kernbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass
    der vordere Bereich (17A) des zweiten Längskanals (17) mindestens teilweise geschlossen ist im Hinblick auf einen Ringspalt (29), der sich zwischen der Krone (20) und einem Kernbohrer (7) während des Kernbohrens bildet, und dass
    die Durchlässe (55) zwischen dem zweiten Längskanal (17) und dem Innenraum (8) nahe der jeweiligen vorderen Bereichen (17A, 8A) angeordnet sind, wobei die Durchlässe (55) vorzugsweise regelmäßig um die Längsachse des Kernbohrwerkzeugs verteilt sind.
  6. Kernbohrwerkzeug nach Anspruch 5, dadurch gekennzeichnet, dass
    ein Kolben (54) in der Innenröhre (5) vorgesehen ist, der von einem Bohrkern während dessen Entstehung von dem vorderen Bereich (8A) des Innenraums (8) zu dem hinteren Bereich (8B) geschoben werden kann,
    die Innenröhre (5) vor einem Kernbohren zwischen dem Kolben (54) im vorderen Bereich (8A) des Innenraums (8) und dessen hinteren Bereich (8B), ein Kernbohrfluid enthält, das gegebenenfalls von dem oben bezeichneten verschieden ist,
    die Durchlässe (55) auf der Seite des Endes (54A) des Kolbens (54), der gegen den Bohrkern (7) gerichtet ist, in den Innenraum (8) münden, und
    die Mittet (18) angeordnet sind, um zumindest zeitweise zwischen dem Innenraum (8) und dem zweiten Längskanal (17) über ihre hinteren Bereiche (8B,17B) eine Fluidverbindung zu schaffen.
  7. Kernbohrwerkzeug nach Anspruch 6, dadurch gekennzeichnet, dass es einen Vordrücker (56) umfasst, der auf dem dem Kernbohrwerkzeug (7) zugewandten Ende (54A) des Kolbens (54) angeordnet ist, so dass er auf dem Boden eines Kembohrlochs (31) und anschließend im Laufe der Entstehung des Bohrkerns auf dessen Oberseite (7) zur Anlage kommt, und dadurch, dass der Kolben (54), oder gegebenenfalls der Vordrücker (56), an seinem Ende, das mit der Oberseite des Bohrkerns (7) zusammenwirken soll, eine Ausfüllöffnung (57) umfasst sowie einen daran angepassten Gang (58) durch den Vordrücker (56) und/oder den Kolben (54), damit vor einem Kernbohren über die Öffnung (57) und den Gang (58) ein Kernbohrfluid mindestens in einen Teil des Innenraums (8) eingeführt werden kann, wenn der Kolben (54) sich praktisch im hinteren Bereich (8A) des Innenraums (8) befindet.
  8. Kernbohrwerkzeug nach einem der vorstehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Mittel (18) angeordnet sind, um zumindest zeitweise über den ersten Längskanal (16) eine Fluidverbindung zwischen einem Kanal (27), der ein Kernbohrfluid von einem Tank auf der Bodenoberfläche herbeiführt und den Zusätzen (28) der Krone (2), herzustellen.
  9. Kembohrwerkzeug nach einem der vorstehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Mittel (18) angeordnet sind, um zumindest zeitweise eine Fluidverbindung zwischen dem hinteren Bereich (8B) des Innenraums (8) und dem Kanal (27) zum Herbeiführen des Kernbohrfluids herzustellen.
  10. Kernbohrwerkzeug nach einem der vorstehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Mittel (18) ein Steuerungsventil (22) umfassen, das angeordnet ist, um selektiv einen Ausfluß von Fluid zu blockieren, das vom Zuflußkanal (27) zum Innenraum (8) über dessen hinteren Bereich (8B) fließt, und um gegebenenfalls ein Ausfließen nach dem hinteren Bereich (8B) zu dem Zuflusskanal (27) oder gegebenenfalls zu dem ersten Längskanal zu erlauben.
  11. Kernbohrwerkzeug nach einem der vorstehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Selektionsmittel (18) angeordnet sind, um mindestens zeitweise eine Fluidverbindung zwischen dem Zuflussgang (27) und dem zweiten Längskanal (17) herzustellen und dadurch, dass es ein Steuerungshilfsventil (39) umfasst, das angeordnet ist, um selektiv ein Ausfließen von Fluid aus dem Zuflußgang (27) in den ersten Längskanal (16) zu blockieren.
  12. Kernbohrwerkzeug nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die äußere Röhre (3) und die mittlere Röhre (15) angeordnet sind, um voneinander unabhängig um ihre gemeinsame Längsachse drehen zu können und dadurch, dass die innere Röhre (5) zumindest während einer Rotation im Hinblick auf die mittlere Röhre (15) fest angeordnet wird.
  13. Kernbohrwerkzeug nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die äußere Röhre (3) und die mittlere Röhre (15), zumindest im Hinblick auf eine Rotation um ihre gemeinsame Längsachse, zueinander fest angeordnet sind und dadurch, dass die mittlere Röhre (15) und die innere Röhre (5) angeordnet sind, um sich unabhängig voneinander um ihre gemeinsame Längsachse zu drehen.
  14. Kernbohrwerkzeug nach einem der vorstehenden Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die innere Röhre (5) und die mittlere Röhre (15) zu einem konstitutiven Aufbau (80) miteinander verbunden sind, um unabhängig voneinander um ihre gemeinsame Längsachse drehen zu können und dadurch, dass sich dieser konstitutive Aufbau (80) in einer äußeren Röhre (3) befindet, um dort verschiebbar zu sein zwischen einer Kernbohrposition in der die mittlere Röhre (15) praktisch an der Kernbohrkrone anliegt und einer Rückstellposition der äußeren Röhre (3), um daraus einen Bohrkem (7) zu entnehmen, wobei der konstitutive Aufbau (80) Mitnahmemittel (81) umfaßt, die an ihrem am weitesten von ihrem vorderen Ende (9) der inneren Röhre (5) entfernt befindlichen Ende angeordnet sind.
  15. Kernbohrwerkzeug nach Anspruch 14, dadurch gekennzeichnet, dass die Mittel (18) einen Ringbuckel (82) auf der Innenwand (83) der Außenröhre (3) umfassen sowie mindestens eine Ausgangsöffnung, wie ein Schrägkanal (36), der in den ersten Längskanal (16) einmündet, und dadurch, dass beim Anliegen des konstitutiven Aufbaus (80) in der äusseren Röhre in einer Kernbohrposition der Ringbuckel (82) sich ausserhalb eines Flusses von Flüssigkeit befindet, der von der Ausgangsöffnung (84) in den ersten Längskanal (16) verläuft, und soweit sich der konstitutive Aufbau (30) von der Auflageposition entfernt, nähern sich der Ringbuckel (82) und die Ausgangsöffnung (84) und orndnen sich gegenüberliegend an, um den Ausfluss von Flüssigkeit von der Ausgangsöffnung (84) in den Längskanal (16) zu beschränken.
  16. Kernbohrwerkzeug nach einem der Ansprüche 13 oder 14, dadurch gekennzeichnet, dass in der Kernbohrposition die mittlere Röhre (15) dicht auf der Seite des vorderen Bereichs (16A) auf der Auflagefläche der Kronenkammer (2) oder der äußeren Röhre (3) aufliegt, um dort den ersten Längskanal (16) zu schließen.
EP97900510A 1996-01-15 1997-01-14 Kernbohrwerkzeug Expired - Lifetime EP0883731B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9600030 1996-01-15
BE9600030A BE1009965A3 (fr) 1996-01-15 1996-01-15 Carottier.
PCT/BE1997/000003 WO1997026438A1 (fr) 1996-01-15 1997-01-14 Carottier

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EP0883731A1 EP0883731A1 (de) 1998-12-16
EP0883731B1 true EP0883731B1 (de) 2002-04-10

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EP (1) EP0883731B1 (de)
BE (1) BE1009965A3 (de)
CA (1) CA2242970C (de)
DE (1) DE69711854T2 (de)
WO (1) WO1997026438A1 (de)

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US6739411B2 (en) 2002-06-27 2004-05-25 Good Earth Tools, Inc. Hollow auger head assembly
US7913775B2 (en) * 2007-12-27 2011-03-29 Schlumberger Technology Corporation Subsurface formation core acquisition system using high speed data and control telemetry
WO2011011837A1 (fr) 2009-07-31 2011-02-03 Halliburton Energy Services, Inc. Tube interne de carottier
WO2011127374A1 (en) 2010-04-09 2011-10-13 Bp Corporation North America Inc. Apparatus and methods for detecting gases during coring operations
US20140027182A1 (en) * 2012-07-26 2014-01-30 National Oilwell Varco, L.P. Telescoping core barrel
US9869146B2 (en) * 2013-04-17 2018-01-16 Halliburton Energy Services, Inc. Methods and apparatus for coring
CN105525885B (zh) * 2014-09-28 2017-11-07 中国石油化工集团公司 一种极疏松地层旋转插入式取心工具
US10072471B2 (en) 2015-02-25 2018-09-11 Baker Hughes Incorporated Sponge liner sleeves for a core barrel assembly, sponge liners and related methods
EP3408492A4 (de) * 2016-01-27 2020-04-08 Reflex Instruments Asia Pacific Pty Ltd Verfahren und system zur erfassung von bohrlochvermessungsdaten und kernorientierungsdaten
CN105545238B (zh) * 2016-01-28 2017-09-15 吉林大学 一种自适应型的取心内管
CN109025874B (zh) * 2018-08-13 2023-05-26 四川大学 取芯钻机自动启动机构
CN110617022A (zh) * 2019-10-24 2019-12-27 四川康克石油科技有限公司 一种取心率高的取心钻具及其工作方法
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Also Published As

Publication number Publication date
EP0883731A1 (de) 1998-12-16
DE69711854T2 (de) 2002-11-14
US6158534A (en) 2000-12-12
CA2242970C (en) 2005-01-11
DE69711854D1 (de) 2002-05-16
BE1009965A3 (fr) 1997-11-04
WO1997026438A1 (fr) 1997-07-24
CA2242970A1 (en) 1997-07-24

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