EP0900319B1 - Procece et dispositif pour decouper des tubes ou des piliers ancres dans le sol - Google Patents

Procece et dispositif pour decouper des tubes ou des piliers ancres dans le sol Download PDF

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Publication number
EP0900319B1
EP0900319B1 EP97925854A EP97925854A EP0900319B1 EP 0900319 B1 EP0900319 B1 EP 0900319B1 EP 97925854 A EP97925854 A EP 97925854A EP 97925854 A EP97925854 A EP 97925854A EP 0900319 B1 EP0900319 B1 EP 0900319B1
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EP
European Patent Office
Prior art keywords
tube
cutting
cutting assembly
ground
assembly
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
Application number
EP97925854A
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German (de)
English (en)
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EP0900319A1 (fr
Inventor
Peter Heinrichs
Fritz Tibussek
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Mhwirth GmbH
Original Assignee
Wirth Maschinen und Bohrgeraete Fabrik GmbH
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Publication of EP0900319A1 publication Critical patent/EP0900319A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/12—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground specially adapted for underwater installations
    • 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
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window

Definitions

  • the invention relates to an apparatus and a method to separate upright, with your lower End of pipes anchored in the ground, especially of support legs an offshore oil drilling or production platform the preambles of claims 1 and 4, respectively.
  • From DE-PS 671 660 is a device for severing known from pipes embedded in deep boreholes, whose cutting tool by means of a rod in the pipe is let down to the point of separation.
  • the Cutting tool is attached to the inner wall of the pipe and cut it from the inside out.
  • This device is not suitable for platforms because the separation point is always in an area of the support legs, the one with seabed, concrete or similar is filled and thus a lowering of the separation point is not possible.
  • a device for cutting is from US Pat of the support legs of an off-shore oil drilling or production platform and their segmental removal known.
  • the Device is due to the special structure used there Adjusted support legs.
  • these consist of an outer Jacket tube and on the other hand from an inner tubular Stake.
  • the jacket pipes With the jacket pipes, the off-shore oil drilling or production platform first placed on the seabed.
  • these cladding tubes in the seabed are then let down the tubular piles within the casing pipes and driven into the ocean floor.
  • the length of the Piles are chosen so that after a sufficient hold was reached in the bottom of the sea Pass in the casing tube.
  • the one between the inner pole and the outer casing tube formed for fastening the off-shore oil drilling or production platform on the ocean floor or to attach the casing tube to the pile a grouting material, such as concrete, backfilled.
  • the concrete is first between an ultrasound process crushed the pile and tube and then rinsed.
  • a separator is then used to remove the pile to the top of the tubular pile let down.
  • This separator essentially consists from a clamping device to attach it to the inside of the pile to be able to hold a predetermined position, as well as from a Cutting device to cut the upper segment of the pile to be able to separate.
  • the cutting device has one in the radial direction and thus acting in the direction of the inner wall of the pile Piston / cylinder unit on, over the rotating cutting discs can be placed on the inner wall of the pile.
  • the object of the invention is a method and an apparatus to create with the pipes of greater length and large diameter like the pillars of offshore oil drilling or production platforms despite the material in the pipes, such as soil or concrete quickly and therefore economically even under the seabed can be separated and also prevented here will that by friction of the cutting tools on the edges of the Separation groove and in the seabed outside the pipe increased wear or even breakage occurs.
  • the complete severing of the pipe due to rising air above the platform signals. This measure prevents the Cutting tools by an intervention in the environment of the cut pipe prematurely wear or even destroyed become.
  • a cutting process is quick because in this way from the relatively soft structural steel of the pipe thick chips removed and in the narrow circumferential direction extending separation zone a groove with a high Feed and high stock removal rate until cutting of the entire material cross-section can be introduced. Since it is cut from the inside, it plays no matter where the separation point with respect to the seabed is located; the procedure is carried out in its function does not affect the external conditions.
  • the task is carried out in its apparatus aspect solved a device according to claim 4, thereby is characterized in that the power drive (34; 134) at least a piston / cylinder unit that can be operated with compressed air comprises and that means are provided that a connection between the working volume of the piston / cylinder unit and the cutting unit (40) and the drilling tool (60) supporting hollow rods (14), as soon as the cutting tools are in their radially outer Extreme position.
  • the power drive (34; 134) at least a piston / cylinder unit that can be operated with compressed air comprises and that means are provided that a connection between the working volume of the piston / cylinder unit and the cutting unit (40) and the drilling tool (60) supporting hollow rods (14), as soon as the cutting tools are in their radially outer Extreme position.
  • the cutting unit according to claim 2 at least one radially movable, with the help a power drive can be pressed against the inner circumference of the tube cutting tool, its point of attack in a substantially perpendicular to the pipe axis Level is progressively shiftable in the circumferential direction.
  • the cutting tool only after reaching the cutting point extended radially and for cutting the Pipe by finally creating a wall thickness continuous inner circumferential groove against its inner circumference employed.
  • the cutting unit several symmetrically comprises cutting tools distributed around the pipe axis, that work simultaneously in the same separation groove.
  • the working area of Cutting tools from residues of the adhering material cleans the attack of the cutting tools.
  • the cleaning device can e.g. a brush-like arrangement of Include cleaning elements.
  • the support device can according to claim 9 in a neighboring already separated Pipe usable, about the same length Include support tube, which is in at the lower end the pipe on the seabed or through the underwater concrete formed pipe foundation and on the top End can be connected to the separated tube, which in the described in claim 10 by a hydraulic tensionable cone tension connection can happen.
  • the separated pipe with the neighboring one Platform parts held up so that the tube in which the cutting unit is working, not so heavily loaded is.
  • FIG. 1 is one of its main components separate oil drilling or production platform 100 shown which includes an actual platform 1, which in the assembled Condition on a support structure designated 2 overall is supported. The whole usually on equipment arranged on platform 1, such as a drilling device, Accommodation etc. is already dismantled and in the Drawing no longer reproduced.
  • platform 1 For assembly and disassembly oil drilling or production platforms 100 and / or Support structures 2, crane ships 5 are used, the Have cranes 6, their lifting height above sea level Can be 200 m and more. In the phase shown the actual platform 1 hangs after loosening from the Support structure 2 already on the cranes 6.
  • the support structure 2 in Fig. 1 is only that Part located above sea level 10 (Fig. 2) drawn, which can be 30 to 40 m high.
  • the support structure 2 is included as a tower or trestle-like scaffold Support legs 3 and truss-like cross struts 4 trained and by means of her down in the water reaching legs (indicated by dash-dotted lines) 3 anchored under the water surface in the seabed.
  • the Water can be over 100m deep and any leg can 3 a comparable distance into the seabed embedded, e.g. be rammed in.
  • the support legs 3 are so very long. They consist of large tubes 13 of 1 up to 2 m in diameter and considerable wall thicknesses from 30 to 50 mm. The number of support legs 3 depends on the structure of the Support structure 2 dependent.
  • Fig. 2 illustrates the dismantling situation of a Support structure 2, which is structurally something of Fig. 1st deviates.
  • the upper parts 3 'of the support legs 3 are on the separation point 8 cut off and still belong to the actual platform 1, which is shown in FIG. 1 by the cranes 6 is lifted off the support structure 2.
  • the support structure 2 protrudes above sea level 10 and extends by a depth corresponding to the water depth Route down to the ocean floor 11.
  • the support legs 3 reach deep into the sea floor 11 and can their lower ends by pressed in underwater concrete or the like anchored in the seabed 11 in a foundation-like manner his.
  • a rotary drive 16 can be arranged in the drive device 30 can be used as it drives a drill head an air-lifting drilling device from the prior art is known. So there can be existing drive devices be used, the modifications only if necessary must have.
  • a so-called Flushing head 17 arranged by the drilling operation material loosened at the bottom of an earth hole by the Inner cross section of the linkage 14 in the direction of Arrow 14A after the air lifting process in line 15 is rinsed out.
  • the operation of the flushing head 17 and the air lifting process are state of the art known and will not be explained in more detail here.
  • a designated 19 Rotary connection head arranged above the compressed air for the Air lifting process and another fluid medium (air or a hydraulic fluid) even at high pressures one or more parallel to or in the linkage 14 this extending supply lines 20 and 22 can be introduced is.
  • Fig. 4 shows an enlarged view of the the lower end of the linkage 14 is rotatably arranged Cutting unit 40 from FIG. 3.
  • the supply line 20 for compressed air and the supply line 22 for compressed air or a hydraulic fluid shown.
  • the compressed air can be used when drilling on the ground material loosened from the bore by the inside of the Rod-shaped flushing channel 21 in the direction of the arrow 14A are conveyed to the surface.
  • flange connections 23 see also FIG. 6 extended downwards in shots, until the cutting unit 40 is at the level of the separation point 9 is lowered.
  • the torque required for machining is on the turntable 18 and the linkage 14 introduced into the cutting unit 40, i.e. it will entire linkage 14 together with the cutting unit 40 within of the tube 13 rotated about its axis A.
  • the cutting unit 40 comprises a central part 41, in the interior thereof the flushing channel 21 is formed and its outer dimension in the exemplary embodiment only about a third of the inner diameter of the tube is 13, so that an annular Gap 42 remains.
  • the cutting unit 40 comprises three symmetrically distributed over the circumference of the linkage 14 swiveling cutting tools 24.
  • Any cutting tool 24 in the exemplary embodiment of FIGS. 3, 4 and 8 its own power drive 34 assigned only to it, that of a fluid-operated piston / cylinder unit can exist.
  • the fluid can be compressed air, its pressure but is limited, or a hydraulic fluid with which higher pressures and thus actuation forces of the power drive 34 can be achieved.
  • the compressed air or the hydraulic fluid are fed via the feed line 22, so that the individual cutting tools 24 synchronously and with the same Forces are operated. It is understood that too there is a separate supply line for each power drive 34 can be.
  • the cutting tools 24 with their power drives are arranged in the annular space 42.
  • the power drives 34 are operated with compressed air, so there can be at least one cylinder between the working volumes and the inside of the linkage 14 one in the Drawing not shown be provided connection which is designed such that it is opened when the piston of this power drive 34 in its the extended position of the cutting tool assigned to it 24 corresponding end position.
  • This Measure is caused to rise in the linkage 14 Air that is observed, for example, on the flushing head 17 can, the complete severing of the pipe signals.
  • the separation process can then be stopped immediately, which prevents the cutting tools from unnecessary friction on the edges of the separating groove prematurely wear out or even penetrate into the outside of the pipe existing seabed are destroyed.
  • Each cutting tool 24 consists of an elongated one Base body 25, at one end of which a cutting plate 26 is attached.
  • the inserts 26 are considered to be from Heavy-duty cutting material suitable for existing inserts educated.
  • the base body 25 is on its Cutting plate 26 facing away from an end on the outer circumference of the central part 41 arranged horizontally to form a circle mounted about the axis A tangentiaien pivot pin 28.
  • the power drive 34 as a piston unit / cylinder unit formed in the space 42 on the outer circumference of the central part fixedly arranged parallel to the axis A. and the piston rod 32 with the handlebar 29 via a on the central part 41 guided slide 33 motionally connected is.
  • the cylinder of the piston / cylinder unit in its fully extended position (below as shown) so that the cutting tool 24 essentially aligned along axis A (position 24 ') and is free of the tube 13.
  • the pivoting of the cutting tool 24 to the inner tube wall or the actuation of the piston / cylinder unit can be done in a variety of ways known to those skilled in the art. If there are several supply lines 22, the piston can 32 alternately with pressure in both directions can be applied, the restoring torque can be applied via springs be effected and the like.
  • the basic body of the cutting tool can also be linear be moved.
  • 5 is a cutting unit 140 with linear to the axis A of the cutting unit 140 or Tube 13 radial guidance of the base body 125 of the Cutting tool 124 shown, the linear guides are formed in a tool guide body 131 which is arranged at the lower end of a central part 141 which at the upper end a flange 143 for connection to the Linkage 14 has.
  • the basic body 125 of the cutting tools 124 are in radial guide channels 123 of the tool guide body 131 relocatable.
  • In the left half 5 is the cutting tool 124 in the extended, shown in the right half in the retracted state.
  • the piston / cylinder unit faces the central part 141 formed pistons 135.
  • the cylinder of the piston / cylinder unit is more surrounding than the piston 135 Sliding cylinder 138 formed, the end plates 138A, 138B on the cylindrical outer circumference 142 of the central part 141 on either side of the radially protruding Piston 135 slide and with piston 135 Form pressure chambers 136, 137 which can be pressurized with compressed air are.
  • Channel 136 may be provided, the mouth of which in the upper Pressure chamber 136 is released when the sliding cylinder 138 in its upper, extended position of the cutting tools 124 is the limit position. Air rising inside the rod 114 signals then again the termination of the separation process.
  • Cutting unit 40, 140 has cutting inserts 26, 126, which can be moved radially out of the cutting unit 40, 140 are and a rotational movement along the inner circumference of the Run tube 13 only around axis A.
  • the cutting inserts 26.126 act like internal parting steels.
  • FIG. 7 shows an alternative embodiment, in which a cutting unit 240 about the axis A is rotatable, but no radially extendable cutting inserts, but rotatable on a tool carrier 231
  • Cutting tools 224 carries that on the edge of the cutting unit are rotatable about axes B parallel to axis A and come to attack on the inner circumference of the tube 13.
  • the cutting tools 224 therefore rotate both around the Axis A as well as about axis B. Disk milling cutter to be formed.
  • the separator 50 is a whole with a cutting unit 40 rotatable on the linkage 14 3 and 4 reproduced.
  • the linkage is there made up of several shots at coupling points 14 '' Rod members 14 'and extends from into the top of the tube 13, of which only the one in FIG top part is shown.
  • To the linkage 14 within the To fix tube 13 radially are at axial intervals mutually stabilizers 35 arranged against the inner wall of the tube 13 and in which the linkage 14 is stored and can rotate freely. Between two Stabilizers 35 is a switching valve 47 in linkage 14 installed with which, for example, the reversal of the direction Radial pivoting movement of the cutting tools 24 controlled can be.
  • a stabilizing bar or drill collar 49 be installed in the linkage 14.
  • a free coupling point 14 '' ' for disengaging further rod elements 14 'or the drive device 30 (Fig. 3) provided.
  • the cutting unit 40 is arranged.
  • the respective predetermined separation point 9 only attainable when the tube 13 is free there.
  • the tube 13 is up to a certain one Height filled with seabed or underwater concrete that can be located above the separation point 9.
  • the task of the drilling tool head 60 is in the pipe material located within the lower section of the pipe 13 to be cut out to below the separation point 9, so that the cutting unit 40 to the intended Separation point 9 can reach.
  • this is brief with reference to Figures 3 and 4 indicated air lifting method used.
  • the device acts like a conventional one Earth auger; the cutting unit 40 is in this case when retracted Cutting tools inoperative. It is only after completed drilling started.
  • the tubes 13 are thus separated using existing drilling units and technology, whereby only between the drill head 60 and the linkage 14 use the cutting unit 40 and with supply lines is to be provided.
  • an approximately circular Outlined drill bit head 60 is over the top Flange 43 to one at the lower end of the cutting unit 40 provided counter flange.
  • At the Bottom of the drilling tool head 60 are, like that Bottom view in Fig. 10 shows fixed, with hard metal occupied drill body 46 or roller chisel arranged, with which the one to be separated in the inner cross section of the Tube 13 located underwater concrete are drilled away can.
  • the suction opening 48 is used for the air lifting method and is with the inner cross section of the linkage 14 (not shown) connected.
  • the cutting plates 26, 126 of the cutting tools 24, 124 when positioning against the inner circumference of the tube 13 can damage or destroy.
  • a cleaning device on the drilling tool head 60 with brush or scratch-like extensions that can be pushed out radially Cleaning elements 44 may be provided, by means of which adhering concrete removed to the metal of the tube 13 is brought into effect before the cutting tools 24, 124 become.
  • FIG. 11 shows a support device 70, with which the load on a pipe 13 just to be separated Weight of the tube 13 itself, neighboring already cut pipes 13 and thus still remaining Superstructures of the platform can be intercepted. Shown is a support leg that is currently being worked on neighboring, already separated at the separation point 9 Tube 13. In the separated tube 13 after the Cutting unit including rods or pulled out with the rope an additional support tube 80 was slightly smaller Lowered diameter, the length of the length of the Tube 13 surpasses and consequently over the upper End of the tube 13 and the residues 63 still connected to it survives the platform.
  • the pipe 13 is below with underwater concrete 61 up to an upper boundary surface 65 filled. This sits on this boundary surface 65 Support tube 80 with its lower end 80 '.
  • a conical tension connection 62 in the space between the support tube 60 and the inner circumference of the tube 13 arranged hydraulically is jammed.
  • a hydraulic one Lift cylinder 64 provided on the rest 63 of the platform attacks.
  • the lifting device 64 is actuated the rest 63 pulled up on the support tube 80. Doing so the upper part of the tube 13 taken away.
  • Between the Attachment of the lifting cylinder 64 and the top of the Remaining 63 of the platform is a defined distance, that during the entire separation process of the others Support legs should be maintained. At the separation point 9 this creates a gap.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Claims (10)

  1. Procédé pour découper des tubes (13) dressés, présentant des longueurs et des diamètres assez grands et ancrés par leurs extrémités inférieures dans le sol, en particulier des béquilles de soutien (3) d'une plate-forme offshore de forage ou de recherche,
    selon lequel on fait descendre dans le tube à découper (13), à travers son extrémité supérieure jusqu'à un endroit de séparation (9), un ensemble de coupe (40, 140, 240) qui, entraíné par de l'air comprimé, agit en progressant périphériquement, de l'intérieur sur la périphérie interne du tube (13), le matériau se trouvant dans le tube, tel que celui constituant le fond de la mer ou du béton qui a pu être coulé dans le tube (13) pour améliorer son ancrage dans le sol (11), étant foré lorsque l'ensemble de coupe est descendu à l'intérieur du tube (13), jusqu'en dessous de l'endroit de séparation (9),
    caractérisé en ce que
    la séparation complète du tube (13) obtenue par l'ensemble de coupe (40, 140, 240), est signalée par la remontée de l'air comprimé à l'intérieur d'une tige creuse (14) portant l'ensemble de coupe (40, 140, 240), en particulier de l'air comprimé alimentant cet appareil de coupe (40, 140, 240).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'ensemble de coupe (40, 140, 240) sépare le tube (13) par enlèvement de copeaux.
  3. Procédé selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    le poids du tube (13) et des éléments de construction (63) qui leur sont éventuellement reliés est pris en charge pendant l'opération de coupe.
  4. Dispositif pour découper des tubes (13) dressés, présentant des longueurs et des diamètres assez grands et ancrés par leurs extrémités inférieures dans le sol, en particulier des béquilles de soutien (3) d'une plate-forme offshore de forage ou de recherche qui comporte
    un entraínement par la force (34, 134),
    un ensemble de coupe (40, 140, 240) que l'on peut, à travers l'extrémité supérieure du tube à couper, faire descendre dans celui-ci jusqu'à un endroit de séparation (9) où l'appareil entre en action sur une zone de séparation (45) axialement étroite de la périphérie interne du tube (13), progressivement en direction périphérique et sépare le tube (13) à l'endroit de séparation (9), dans lequel
    sous l'ensemble de coupe (40) se trouve une tête d'outil de forage (60) pouvant être entraínée en rotation et avec laquelle il est possible de percer le matériau se trouvant dans la zone inférieure du tube (13) tel que celui constituant le fond de la mer ou du béton (61) qui a pu être coulé dans le tube (13) pour améliorer son ancrage dans le sol (11), ce forage s'effectuant à l'intérieur du tube (13) jusqu'à une profondeur telle que l'ensemble de coupe (40, 140, 240) peut parvenir et intervenir à l'endroit de séparation (9) prévu,
    caractérisé en ce que
    l'entraínement (34 ; 134) comprend au moins un vérin fonctionnant à l'air comprimé, des moyens étant prévus pour réaliser une liaison entre la chambre de travail du vérin et une tige creuse (14) portant l'ensemble de coupe (40) et l'outil de forage (60), dès que les outils de coupe (24 ; 124 ; 224) ont atteint leur position radiale extrême vers l'extérieur.
  5. Dispositif selon la revendication 4,
    caractérisé en ce que
    l'ensemble de coupe (40, 140, 240) comprend au moins un outil de coupe (24 ; 124 ; 224) par enlèvement de copeaux, mobile radialement et pouvant être appliqué contre la périphérie interne du tube (13) par un entraínement, le point d'action de cet outil pouvant être déplacé progressivement en direction périphérique, dans un plan essentiellement perpendiculaire à l'axe (A) du tube.
  6. Dispositif selon la revendication 5,
    caractérisé en ce que
    l'ensemble de coupe (40, 140, 240) comporte plusieurs outils de coupe (24 ; 124 ; 224) répartis symétriquement autour de l'axe (A) .
  7. Dispositif selon l'une quelconque des revendications 4 à 6,
    caractérisé en ce qu'
    à l'ensemble de coupe (40) est associé un dispositif de nettoyage (44) débarrassant du matériau adhérant une zone annulaire située le long de l'endroit de séparation (9) et allant jusqu'au métal du tube (13).
  8. Dispositif selon l'une quelconque des revendications 4 à 7,
    caractérisé en ce qu'
    il est prévu un dispositif de soutien qui prend en charge le poids du tube (13) et des éléments de construction (63) qui lui sont éventuellement reliés, lors du procédé de séparation.
  9. Dispositif selon la revendication 8,
    caractérisé en ce que
    le dispositif de soutien comprend un tube de soutien (80) ayant à peu près la même longueur qu'un tube voisin déjà coupé (13) dans lequel il peut être introduit, ce tube de soutien étant posé par son extrémité inférieure (80') sur le fond, c'est-à-dire la fondation du tube, tandis que dans la zone de son extrémité supérieure (80''), il peut être relié par un dispositif de levage (64) au tube coupé (13) ou aux éléments de construction (63) reliés à celui-ci.
  10. Dispositif selon la revendication 9,
    caractérisé en ce que
    il est prévu entre la périphérie externe du tube de soutien (80) et la périphérie interne du tube (13), une liaison par cône d'expansion (62) pouvant être contrainte2 hydrauliquement.
EP97925854A 1996-05-23 1997-05-21 Procece et dispositif pour decouper des tubes ou des piliers ancres dans le sol Expired - Lifetime EP0900319B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19620756 1996-05-23
DE19620756A DE19620756A1 (de) 1996-05-23 1996-05-23 Verfahren und Vorrichtung zum Abtrennen von im Boden verankerten Rohren oder Pfeilern
PCT/DE1997/001017 WO1997044566A1 (fr) 1996-05-23 1997-05-21 Procece et dispositif pour decouper des tubes ou des piliers ancres dans le sol

Publications (2)

Publication Number Publication Date
EP0900319A1 EP0900319A1 (fr) 1999-03-10
EP0900319B1 true EP0900319B1 (fr) 2001-04-18

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Application Number Title Priority Date Filing Date
EP97925854A Expired - Lifetime EP0900319B1 (fr) 1996-05-23 1997-05-21 Procece et dispositif pour decouper des tubes ou des piliers ancres dans le sol

Country Status (5)

Country Link
US (1) US6183165B1 (fr)
EP (1) EP0900319B1 (fr)
DE (2) DE19620756A1 (fr)
NO (1) NO312641B1 (fr)
WO (1) WO1997044566A1 (fr)

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DE19620756A1 (de) 1997-11-27
WO1997044566A1 (fr) 1997-11-27
NO312641B1 (no) 2002-06-10
DE59703394D1 (de) 2001-05-23
NO985355L (no) 1998-11-17
US6183165B1 (en) 2001-02-06
EP0900319A1 (fr) 1999-03-10
NO985355D0 (no) 1998-11-17

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