EP0498925A1 - Device for connecting tubes insertable into wells and filled with bentonite - Google Patents

Device for connecting tubes insertable into wells and filled with bentonite Download PDF

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Publication number
EP0498925A1
EP0498925A1 EP91115636A EP91115636A EP0498925A1 EP 0498925 A1 EP0498925 A1 EP 0498925A1 EP 91115636 A EP91115636 A EP 91115636A EP 91115636 A EP91115636 A EP 91115636A EP 0498925 A1 EP0498925 A1 EP 0498925A1
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EP
European Patent Office
Prior art keywords
elements
coupling
receiving element
pipe section
pipe
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Granted
Application number
EP91115636A
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German (de)
French (fr)
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EP0498925B1 (en
Inventor
Dirk Heuser
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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/134—Bridging plugs
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
    • 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
    • E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
    • E21B27/02—Dump bailers, i.e. containers for depositing substances, e.g. cement or acids

Definitions

  • the invention is directed to a device for connecting pipe sections that can be lowered in boreholes, fillable with swelling clay or the like, made of a water-soluble material, with a coupling receiving element at one pipe end and a corresponding coupling engagement element at the other pipe end.
  • holes are drilled using very different techniques, be it by means of explosive devices, so-called flushed holes, lance compressed air holes or hammered holes, which are used to obtain information about the soil layers.
  • flushed holes lance compressed air holes or hammered holes, which are used to obtain information about the soil layers.
  • lance compressed air holes or hammered holes which are used to obtain information about the soil layers.
  • hammered holes A plurality of water-bearing layers can inevitably be pierced. It is usually not desirable to maintain this existing connection after the drilling has been completed, so that the boreholes are blocked or filled.
  • DE-37 15 398-A1 discloses a method and a device for isolating absorbent layers in boreholes, in which a sealing mixture can be discharged via a diffuser provided on the lower drill pipe.
  • DE-31 02 602 shows a method for solidifying geological Formations in which a certain pit sand mixture is discharged into the bottom of the drill hole, which is sealed at the top by a seal to allow setting within the mixture.
  • the object of the invention is to provide a solution with which a simple lowering of such drill shots in the bottom of the borehole is possible.
  • the two drill section connecting elements are essentially pot-shaped, each with a cylindrical jacket protruding into the interior of the tube and fixable there, and in that the bottom of the pot has at least one passage opening.
  • Another advantage of the invention is that the sections which can be screwed together to form a longer pipe section, in particular in gas-bearing bores, can no longer be thrown out by the rising gas, which can occur in practice in the case of individual pipe sections which are not connected to one another.
  • the receiving element on its inner cylinder wall surface and the engaging element on its outer wall engaging there are provided with corresponding threaded sections.
  • the invention also provides that the engaging element has a stop shoulder for the free end of the receiving element such that in the coupling position the two pot bases lying parallel to one another are at a distance from one another.
  • the invention also provides that at least a portion of the cylinder wall of the coupling engagement element projects over the end of the pipe weft in the position of use and is provided with openings on the jacket side.
  • the invention provides that the coupling elements are fixed to pipe sections by means of knurling and / or by means of hard clips.
  • the invention provides in a modified embodiment that both coupling elements made of a thermoplastic Plastic material are made and are attached to the pipe weft by means of a hot expanding needle from inside to outside drawn plastic cams.
  • This type of attachment is particularly simple and environmentally friendly.
  • the end elements e.g. the cardboard tube body in the area of the fastening elements is pierced from the outside with a hot expanding needle
  • the plastic jacket of the end element is pierced
  • the hot expansion needle is spread out and pulled from the inside to the outside in such a way that plastic material pulls into the entry hole and thus fixes the plastic body on the cardboard tube.
  • friction-enhancing corrugation is additionally provided with barbs directed against the pull-out direction and / or that the outer surface of the two end elements in the contact area with the pipe weft is equipped with circumferential ribs, in particular with barbed ribs positioned obliquely against the pull-out direction.
  • fastening ribs are provided instead of the friction-increasing corrugation, the type of fastening can be carried out in such a way that the cardboard tube in the contact area is pressed onto the ribs from the outside using steam tongs, such that the ribs penetrate the cardboard body.
  • both the coupling receiving element and the coupling engagement element are made from a physiologically compatible plastic.
  • Fig. 1 an alternation between clay layers 2, 2 ', 2' 'and gravel layers 3, 3', 3 '' is shown in addition to an upper soil cover 1, not defined, which penetrated by a bore 4 and in this way also connected with each other, at least as far as groundwater is concerned.
  • individual pipe sections 5 are introduced, in which there is swelling clay or bentonite in the example shown, which swells after wetting with groundwater and fills the entire borehole, which is indicated.
  • the filling areas of the borehole 4 are designated 6 in FIG. 1.
  • the connecting device In the parting line of the individual pipe sections 5 is the connecting device according to the invention, which essentially consists of two mutually corresponding elements, namely a coupling engagement element 7 shown in FIG. 2 and a coupling receiving element 8 shown below, each made of a physiologically compatible plastic.
  • the pipe sections 5 made of water-soluble cardboard or the like are only hinted at partially in FIG. 2.
  • both the coupling engagement element 7 and the coupling receiving element 8 are each equipped with a pot base 9 or 10, in which openings 11 or 12 of different designs are provided.
  • the openings 11 and 12 can be made circular or edge-shaped as rectangular recesses or in some other way.
  • the receiving element 8 has an upper stop edge 13 and the engagement element 7 has a stop edge 14, which abut one another in the coupling position.
  • the distance between the pot base 10 on the one hand and the edge 13 on the other hand in the case of the receiving element 8 is denoted by "X”
  • the distance between the pot bottom 9 and the stop edge 14 in the case of the engaging element 7 is denoted by "Y”
  • "Y" being less than "X”
  • a wall-side, exposed edge 15 is provided by means of another
  • the stop edge 16 for the pipe section 5 in the coupling engagement element 7 is provided with further holes 11a on the outside edge, in order to make it possible for gases or liquids to escape or enter here.
  • threaded sections 18 are provided on the inner surface of the cup wall of the receiving element, designated 17, while corresponding threaded sections 20 are provided on the outer wall 19 of the engaging element 7. Both elements 7 and 8 have a friction-increasing fluting 21 in order to achieve a comparatively firm connection with the pipe weft wall 5.
  • FIGS. 3 to 9 show modified exemplary embodiments of the invention, with different design options for the type of fastening between the fastening elements on the one hand and the cardboard casing of the pipe section on the other hand.
  • FIGS. 3 and 4 has a tube section 5a made of cardboard with an upper coupling engagement element 7a, which here also by means of staples 22
  • the tubular body 5a is fastened like the lower coupling receptacle element 8a, the remaining configuration essentially corresponding to that according to the embodiment according to FIG. 2.
  • FIG. 5 shows another type of fastening of the coupling elements 7b and 8b, which are to be made here from thermoplastic material.
  • the type of fastening is selected here so that the cardboard of the pipe section 5b is first pierced from the outside by means of a hot expanding needle, so that a hole 23 is formed. The needle is now spread apart, so that plastic material is drawn into the hole 23, so that a plastic cam 24 is formed.
  • a large number of plastic connecting cams 23 can be produced on the circumference.
  • barbs 25 can be provided in the area of the friction-increasing fluting 21c in the coupling elements 7c and 8c, which barbs are inclined against the direction of extension.
  • a plurality can be distributed around the circumference instead of the number of barbs shown.
  • FIG. 9 shows that the ribs can also be designed as barb ribs 27 set in the pull-out direction, it also being possible to provide a combination of the respective securing elements on the coupling elements 8d and 8e.
  • the described embodiment can be modified in many ways without leaving the basic idea.
  • the cylinder wall area 15 provided with recesses can also be provided simultaneously and alternatively on the coupling receiving element 8.
  • the pot bases 9 and 10 can be designed like a net and the like. More.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Joints Allowing Movement (AREA)
  • Medicinal Preparation (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Ceramic Products (AREA)
  • Earth Drilling (AREA)

Abstract

By means of a device for connecting pipes of water-soluble material which can be inserted into wells and filled with bentonite or the like, with a coupling receiving element at one pipe-section end and a coupling engagement element, corresponding to the coupling receiving element, at the other pipe-section end, a solution is to be provided with which problem-free insertion of drilling sections of this type in the well bottom is possible with simple means. This is achieved in that both elements (7, 8) are essentially of pot-shaped design with one cylindrical casing each which projects into the interior of the pipe section (5) and can be secured in position there, and in that the pot base (9 or 10) has at least one passage opening (11 or 12, respectively). <IMAGE>

Description

Die Erfindung richtet sich auf eine Vorrichtung zur Verbindung von in Bohrlöchern absenkbaren, mit Quellton oder dgl. füllbaren Rohrschüssen, aus einem wasserlöslichen Material, mit einem Kupplungsaufnahmeelement an einem Rohrschußende und einem damit korrespondierenden Kupplungseingriffselement am anderen Rohrschußende.The invention is directed to a device for connecting pipe sections that can be lowered in boreholes, fillable with swelling clay or the like, made of a water-soluble material, with a coupling receiving element at one pipe end and a corresponding coupling engagement element at the other pipe end.

Es werden zu vielfachen Zwecken Bohrungen in sehr unterschiedlichen Techniken niedergebracht, sei es über Sprengsätze, als sogenannte gespülte Löcher, als Lanzendruckluftlöcher oder gehämmerte Löcher, mit denen man Aufschluß über die Bodenschichtungen erreichen will. Zwangsläufig können dabei eine Mehrzahl von wasserführenden Schichten durchstoßen werden. Dabei ist es in der Regel nicht wünschenswert, nach Aufgabe der Bohrung diese vorhandene Verbindung aufrechtzuerhalten, so daß man die Bohrlöcher verdämmt oder verfüllt.For many purposes, holes are drilled using very different techniques, be it by means of explosive devices, so-called flushed holes, lance compressed air holes or hammered holes, which are used to obtain information about the soil layers. A plurality of water-bearing layers can inevitably be pierced. It is usually not desirable to maintain this existing connection after the drilling has been completed, so that the boreholes are blocked or filled.

Aus der DE-37 15 398-Al ist ein Verfahren und eine Einrichtung zur Isolierung von absorbierenden Schichten in Bohrlöchern bekannt, bei dem über einem am unteren Bohrgestänge vorgesehenen Difusor ein Abdichtungsgemisch austragbar ist.DE-37 15 398-A1 discloses a method and a device for isolating absorbent layers in boreholes, in which a sealing mixture can be discharged via a diffuser provided on the lower drill pipe.

Die DE-31 02 602 zeigt ein Verfahren zur Verfestigung geologischer Formationen, bei dem eine bestimmte Grubensandmischung im unteren Bohrgrund ausgetragen wird, die nach oben durch eine Abdichtung verschlossen wird, um die Abbindung innerhalb des Gemisches zu ermöglichen.DE-31 02 602 shows a method for solidifying geological Formations in which a certain pit sand mixture is discharged into the bottom of the drill hole, which is sealed at the top by a seal to allow setting within the mixture.

Es ist auch bekannt, in die Bohrungen sogenannte Quelltonstangen niederzulassen, wobei der Quellton in wasserlöslichen Papprohren eingebracht ist, um dann, wenn er mit Wasser in Berührung kommt, aufzuquellen und das Bohrloch dichtend zu füllen. Beim Nacheinandereinfüllen von entsprechenden Rohrschüssen ist nicht mit Sicherheit gewährleistet, daß diese auch bis in den Bohrgrund absinken. Sie können sich innerhalb des Bohrloches verkanten und verklemmen, und zwar bereits so früh, daß eine optimale Füllung des Bohrloches nicht mehr gewährleistet ist.It is also known to place so-called swelling clay rods in the holes, the swelling clay being introduced into water-soluble cardboard pipes, so that when it comes into contact with water, it swells and fills the borehole in a sealed manner. When filling corresponding pipe sections one after the other, there is no guarantee that they will sink into the bottom of the drill. You can jam and jam within the borehole, so early that an optimal filling of the borehole is no longer guaranteed.

Aufgabe der Erfindung ist die Schaffung einer Lösung, mit der mit einfachen Mitteln ein problemloses Absenken derartiger Bohrschüsse in dem Bohrlochgrund möglich ist.The object of the invention is to provide a solution with which a simple lowering of such drill shots in the bottom of the borehole is possible.

Mit einer Vorrichtung der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß die beiden Bohrschuß-Verbindungselemente im wesentlichen topfförmig ausgebildet sind mit je einem in das Rohrinnere ragenden und dort festlegbaren zylindrischen Mantel und daß der Topfboden wenigstens eine Durchtrittsöffnung aufweist.With a device of the type described in the introduction, this object is achieved according to the invention in that the two drill section connecting elements are essentially pot-shaped, each with a cylindrical jacket protruding into the interior of the tube and fixable there, and in that the bottom of the pot has at least one passage opening.

Mit der Erfindung wird erreicht, daß zum einen die einzelnen Rohrschüsse problemlos aneinanderfestgelegt werden können, zum anderen aber in jedem Falle sichergestellt ist, daß nicht nur kreisförmige Bestandteile, sondern insbesondere auch das im Bohrloch befindliche Wasser problemlos in den Rohrschüssen aufsteigen kann, da in den Trenn- und Verbindungsebenen entsprechende Durchtrittsöffnungen vorgesehen sind.With the invention it is achieved that on the one hand the individual pipe sections can be easily attached to one another, but on the other hand it is ensured in any case that not only circular components, but in particular also the water in the borehole can rise easily in the pipe sections, since in the Separation and connection levels corresponding passage openings are provided.

Ein weiterer Vorteil der Erfindung besteht darin, daß die zu einem längeren Rohrschuß zusammenschraubbaren Abschnitte insbesondere bei gasführenden Bohrungen nicht mehr durch das aufsteigende Gas ausgeschleudert werden können, was bei Einzelrohrschüssen, die nicht miteinander verbunden sind, in der Praxis vorkommen kann.Another advantage of the invention is that the sections which can be screwed together to form a longer pipe section, in particular in gas-bearing bores, can no longer be thrown out by the rising gas, which can occur in practice in the case of individual pipe sections which are not connected to one another.

In Ausgestaltung ist vorgesehen, daß das Aufnahmeelement an seiner Innenzylinderwandfläche und das Eingriffselement an seiner dort eingreifenden Außenwand mit korrespondierenden Gewindeabschnitten versehen sind.In an embodiment it is provided that the receiving element on its inner cylinder wall surface and the engaging element on its outer wall engaging there are provided with corresponding threaded sections.

Es hat sich gezeigt, daß kurze Gewindeabschnitte in der Regel ausreichen, um eine für den Absenkzweck ausreichende Verbindung herzustellen, wobei die Praxis gezeigt hat, daß durch das im Bohrloch befindliche Wasser ein Auftrieb vorhanden ist, so daß eine sehr feste, jeglicher Zugbelastung standhaltende Verbindung hier nicht notwendig ist. Nach Aufquellen des Quelltones bzw. des Bentonit-Granulates senken sich die Stangen durch ihr Eigengewicht langsam selber in das Bohrloch ab, Flüssigkeit und eingeschlossene Luft kann durch die Topfboden-Bohrungen problemlos entweichen bzw. nach oben steigen.It has been shown that short thread sections are usually sufficient to produce a connection sufficient for the lowering purpose, and practice has shown that the water in the borehole creates a buoyancy is, so that a very firm connection that withstands any tensile load is not necessary here. After swelling of the swelling clay or the bentonite granules, the rods slowly lower themselves into the borehole due to their own weight, liquid and trapped air can easily escape through the bottom of the pot or rise upwards.

Die Erfindung sieht in weiterer Ausgestaltung auch vor, daß das Eingriffselement eine Anschlagschulter für das freie Ende des Aufnahmeelementes derart aufweist, daß in der Kupplungslage die beiden parallel zueinander liegenden Topfböden einen Abstand zueinander aufweisen.In a further embodiment, the invention also provides that the engaging element has a stop shoulder for the free end of the receiving element such that in the coupling position the two pot bases lying parallel to one another are at a distance from one another.

Mit dieser Gestaltung ist sichergestellt, daß ein Übergang der Flüssigkeit bzw. des eingeschlossenen Gases in den Kupplungsebenen von einem Rohrschuß zum anderen ohne Probleme möglich ist. Es ist dadurch insbesondere von untergeordneter Bedeutung, ob die in den Topfböden vorgesehenen Bohrungen miteinander fluchten oder gegeneinander versetzt sind.This design ensures that a transition of the liquid or the enclosed gas in the coupling planes from one pipe section to the other is possible without problems. It is therefore of minor importance in particular whether the holes provided in the pot bottoms are aligned with one another or offset from one another.

Die Erfindung sieht auch vor, daß wenigstens ein Bereich der Zylinderwand des Kupplungseingriffselementes in der Gebrauchslage über das Rohrschußende ragt und mit mantelseitigen Durchbrüchen versehen ist.The invention also provides that at least a portion of the cylinder wall of the coupling engagement element projects over the end of the pipe weft in the position of use and is provided with openings on the jacket side.

Mit dieser Gestaltung ist es möglich, daß beispielsweise ein Überschußvolumen, an Flüssigkeit oder Gas aus einem untenliegenden Rohrschuß in den darüberliegenden auch zur Seite austreten kann und/oder ggf. Flüssigkeit von außen hier eindringen kann, um das Quellen des Bentonits zu erreichen, wenn darunterliegende Elemente möglicherweise nicht ausreichend benetzt sind.With this design, it is possible that, for example, an excess volume of liquid or gas from a pipe section below can also escape to the side in the one above and / or liquid can penetrate here from outside in order to cause the swelling of the bentonite, if it is below Elements may not be adequately wetted.

Um zu gewährleisten, daß die Kupplungselemente beim Absenken der Rohrschüsse in das Bohrloch nicht aus den Kartonrohren ausweichen, sieht die Erfindung vor, daß die Kupplungselemente mittels einer Ausriffelung und/oder mittels Hartklammern an Rohrschüssen festgelegt sind.In order to ensure that the coupling elements do not move out of the cardboard tubes when the pipe sections are lowered into the borehole, the invention provides that the coupling elements are fixed to pipe sections by means of knurling and / or by means of hard clips.

Diese Befestigungsart ist beispielsweise bei Papprohren, die zu Verpackungszwecken von großformatigen Zeichnungen oder dgl. herangezogen werden, bekannt, auch hier können Kunststoffabschlußkappen, z.B. mittels metallischer Heftklammern befestigt sein. Metallische Heftklammern haben allerdings beim vorliegenden Einsatzgebiet einen erheblichen Nachteil, daß sie in der Regal nicht besonders umweltfreundlich sind und für sich bestimmungsgemäß im Erdreich verbleiben sollen.This type of fastening is known, for example, for cardboard tubes which are used for packaging purposes for large-format drawings or the like. Plastic end caps, e.g. be attached by means of metallic staples. Metallic staples, however, have a considerable disadvantage in the present field of application that they are not particularly environmentally friendly on the shelf and are intended to remain in the ground as intended.

Um hier auch eine umweltverträgliche Befestigungsart zu ermöglichen, sieht die Erfindung in abgewandelter Ausgestaltung vor, daß beide Kupplungselemente aus einem thermoplastischen Kunststoffmaterial gefertigt sind und mittels einer Heiß-Spreiznadel von innen nach außen gezogene Kunststoffnocken am Rohrschuß befestigt sind.In order to enable an environmentally compatible type of fastening here, the invention provides in a modified embodiment that both coupling elements made of a thermoplastic Plastic material are made and are attached to the pipe weft by means of a hot expanding needle from inside to outside drawn plastic cams.

Diese Befestigungsart ist besonders einfach und umweltfreundlich. Bei der Befestigung der Abschlußelemente wird z.B. der Kartonrohrkörper im Bereich der Befestigungselemente von außen mit einer heißen Spreiznadel durchstochen, gleichzeitig wird der Kunststoffmantel des Abschlußelementes durchstochen. Nunmehr wird die heiße Spreiznadel aufgespreizt und von innen nach außen gezogen, derart, daß sich Kunststoffmaterial mit in das Einstiegsloch hineinzieht und damit den Kunststoffkörper am Papprohr festlegt.This type of attachment is particularly simple and environmentally friendly. When fastening the end elements, e.g. the cardboard tube body in the area of the fastening elements is pierced from the outside with a hot expanding needle, at the same time the plastic jacket of the end element is pierced Now the hot expansion needle is spread out and pulled from the inside to the outside in such a way that plastic material pulls into the entry hole and thus fixes the plastic body on the cardboard tube.

Eine weitere Befestigungsart besteht darin, daß die reibungserhöhende Riffelung zusätzlich mit gegen die Auszugsrichtung gerichteten Widerhaken versehen ist und/oder daß die Außenoberfläche der beiden Abschlußelemente im Kontaktbereich mit dem Rohrschuß mit umlaufenden Rippen, insbesondere mit schräg gegen die Auszugsrichtung angestellten Widerhaken-Rippen ausgerüstet ist.Another type of fastening is that the friction-enhancing corrugation is additionally provided with barbs directed against the pull-out direction and / or that the outer surface of the two end elements in the contact area with the pipe weft is equipped with circumferential ribs, in particular with barbed ribs positioned obliquely against the pull-out direction.

Werden Befestigungsrippen statt der reibungserhöhenden Riffelung vorgesehen, kann die Befestigungsart derart erfolgen, daß das Papprohr im Kontaktbereich von außen mit einer Dampfzange auf die Rippen aufgepreßt wird, derart, daß die Rippen in den Pappkörper eindringen.If fastening ribs are provided instead of the friction-increasing corrugation, the type of fastening can be carried out in such a way that the cardboard tube in the contact area is pressed onto the ribs from the outside using steam tongs, such that the ribs penetrate the cardboard body.

Vorteilhaft ist es, nicht zuletzt aus Umweltverträglichkeitsgründen, wenn sowohl das Kupplungsaufnahmeelement als auch das Kupplungseingriffselement aus einem physiologisch verträglichen Kunststoff gefertigt sind.It is advantageous, not least for reasons of environmental compatibility, if both the coupling receiving element and the coupling engagement element are made from a physiologically compatible plastic.

Die Erfindung ist nachstehend anhand der Zeichnung beispielsweise näher erläutert. Diese zeigt in

Fig. 1
in vereinfachter Darstellung den Schnitt durch einen Erdbereich eines Bohrloches mit einer Mehrzahl von aneinandergekuppelten Rohrschüssen,
Fig. 2
eine vereinfachte räumliche, teilweise aufgebrochene Darstellung zweier korrespondierender benachbarter Verbindungselemente,
Fig. 3
eine Seitenansicht, teilweise geschnitten auf einen Rohrschuß mit Abschlußelementen,
Fig. 4
einen Schnitt gemäß Linie IV-IV in Fig. 3,
Fig. 5
einen Schnitt durch einen Rohrschuß mit abgewandelten Befestigungselementen sowie in den
Fig. 6 bis 9
abgewandelte Ausführungen von Verbindungselementen.
The invention is explained below with reference to the drawing, for example. This shows in
Fig. 1
in a simplified representation, the section through an earth region of a borehole with a plurality of pipe sections coupled to one another,
Fig. 2
a simplified spatial, partially broken-open representation of two corresponding adjacent connecting elements,
Fig. 3
a side view, partially cut on a pipe section with end elements,
Fig. 4
4 shows a section along line IV-IV in FIG. 3,
Fig. 5
a section through a pipe section with modified fasteners and in the
6 to 9
modified versions of fasteners.

In Fig. 1 soll neben einer oberen nicht näher definierten Erdabdeckung 1 ein Wechsel zwischen Tonschichten 2, 2', 2'' und Kiesschichten 3, 3', 3'' dargestellt sein, die von einer Bohrung 4 durchdrungen und auf diese Art und Weise auch miteinander, wenigstens was das Grundwasser angeht, verbunden sind. In die Bohrung 4 sind einzelne Rohrschüsse 5 eingebracht, in denen sich im dargestellten Beispiel Quellton bzw. Bentonit befindet, welches nach Benetzung mit Grundwasser aufquillt und das gesamte Bohrloch ausfüllt, was andeutungsweise wiedergegeben ist. Die Füllbereiche des Bohrloches 4 sind in Fig. 1 mit 6 bezeichnet.In Fig. 1, an alternation between clay layers 2, 2 ', 2' 'and gravel layers 3, 3', 3 '' is shown in addition to an upper soil cover 1, not defined, which penetrated by a bore 4 and in this way also connected with each other, at least as far as groundwater is concerned. In the bore 4, individual pipe sections 5 are introduced, in which there is swelling clay or bentonite in the example shown, which swells after wetting with groundwater and fills the entire borehole, which is indicated. The filling areas of the borehole 4 are designated 6 in FIG. 1.

In der Trennfugenebene der einzelnen Rohrschüsse 5 befindet sich die erfindungsgemäße Verbindungsvorrichtung, die im wesentlichen aus zwei miteinander korrespondierenden Elementen besteht, nämlich einem in Fig. 2 dargestellten Kupplungseingriffselement 7 und einem unten dargestellten Kupplungsaufnahmeelement 8 je aus einem physiologisch verträglichen Kunststoff. Die Rohrschüsse 5 aus wasserlöslicher Pappe oder dgl. sind in Fig. 2 nur andeutungsweise, teilweise geschnitten, dargestellt.In the parting line of the individual pipe sections 5 is the connecting device according to the invention, which essentially consists of two mutually corresponding elements, namely a coupling engagement element 7 shown in FIG. 2 and a coupling receiving element 8 shown below, each made of a physiologically compatible plastic. The pipe sections 5 made of water-soluble cardboard or the like are only hinted at partially in FIG. 2.

Für die Erfindung wesentlich ist, daß sowohl das Kupplungseingriffselement 7 als auch das Kupplungsaufnahmeelement 8 je mit einem Topfboden 9 bzw. 10 ausgerüstet sind, in denen Durchbrechungen 11 bzw. 12 unterschiedlicher Gestaltung vorgesehen sind.It is essential for the invention that both the coupling engagement element 7 and the coupling receiving element 8 are each equipped with a pot base 9 or 10, in which openings 11 or 12 of different designs are provided.

Erkennbar können die Durchbrechungen 11 bzw. 12 kreisförmig oder randseitig als Rechtecksausnehmungen oder in anderer Weise gestaltet sein.The openings 11 and 12 can be made circular or edge-shaped as rectangular recesses or in some other way.

Das Aufnahmeelement 8 weist einen oberen Anschlagrand 13 und das Eingriffselement 7 einen Anschlagrand 14 auf, die sich in der Kupplungslage aneinander anlegen. Der Abstand zwischen Topfboden 10 einerseits und Rand 13 andererseits im Falle des Aufnahmeelementes 8 ist mit "X" bezeichnet, der Abstand des Topfbodens 9 zum Anschlagrand 14 im Falle des Eingriffselementes 7 ist mit "Y" bezeichnet, wobei erfindungsgemäß "Y" kleiner ist als "X", derart, daß in der Kupplungslage ein Abstand zwischen den Böden 9 und 10 vorhanden ist und das problemlos durch die Ausnehmungen 11 und 12 gasförmige Medien oder Flüssigkeiten strömen können, unabhängig davon, ob die Durchbrechungen 11 und 12 miteinander fluchten oder nicht.The receiving element 8 has an upper stop edge 13 and the engagement element 7 has a stop edge 14, which abut one another in the coupling position. The distance between the pot base 10 on the one hand and the edge 13 on the other hand in the case of the receiving element 8 is denoted by "X", the distance between the pot bottom 9 and the stop edge 14 in the case of the engaging element 7 is denoted by "Y", with "Y" being less than "X", such that there is a distance between the bases 9 and 10 in the coupling position and that gaseous media or liquids can easily flow through the recesses 11 and 12, regardless of whether the openings 11 and 12 are aligned with one another or not.

Zusätzlich ist in Fig. 2 noch angedeutet, daß ein wandseitiger, freigebliebener Rand 15 mittels eines weiteren vorgesehenen Anschlagrandes 16 für den Rohrschuß 5 beim Kupplungseingriffselement 7 vorgesehen ist mit außenrandseitigen weiteren Löchern 11a, um auch hier einen Austritt bzw. Eintritt von Gasen oder Flüssigkeiten möglich zu machen.In addition, it is also indicated in Fig. 2 that a wall-side, exposed edge 15 is provided by means of another The stop edge 16 for the pipe section 5 in the coupling engagement element 7 is provided with further holes 11a on the outside edge, in order to make it possible for gases or liquids to escape or enter here.

Erkennbar sind auf der Innenfläche der mit 17 bezeichneten Topfwand des Aufnahmeelementes 8 Gewindeabschnitte 18 vorgesehen, während auf der Außenwand 19 beim Eingriffselement 7 korrespondierende Gewindeabschnitte 20 vorgesehen sind. Eine reibungserhöhende Ausriffelung 21 weisen beide Elemente 7 und 8 auf, um eine vergleichsweise feste Verbindung mit der Rohrschußwand 5 zu erreichen.As can be seen, 8 threaded sections 18 are provided on the inner surface of the cup wall of the receiving element, designated 17, while corresponding threaded sections 20 are provided on the outer wall 19 of the engaging element 7. Both elements 7 and 8 have a friction-increasing fluting 21 in order to achieve a comparatively firm connection with the pipe weft wall 5.

In den Figuren 3 bis 9 sind abgewandelte Ausführungsbeispiele der Erfindung dargestellt, wobei es hier insbesondere um unterschiedliche Gestaltungsmöglichkeiten der Befestigungsart zwischen den Befestigungselementen einerseits und dem Kartonmantel des Rohrschusses andererseits geht.FIGS. 3 to 9 show modified exemplary embodiments of the invention, with different design options for the type of fastening between the fastening elements on the one hand and the cardboard casing of the pipe section on the other hand.

In den Fig. 3 bis 9 sind die vergleichbaren Bauteilelemente aus Fig. 2 mit den gleichen Bezugsziffern versehen, ergänzt um Buchstaben.3 to 9, the comparable component elements from FIG. 2 are provided with the same reference numbers, supplemented by letters.

Die in Fig. 3 und 4 dargestellte Ausführungsform weist einen Rohrschuß 5a aus Pappe auf mit einem oberen Kupplungseingriffselement 7a, das hier mittels Heftklammern 22 ebenso am Rohrkörper 5a befestigt ist wie das untere Kupplungsaufnahmeelement 8a, wobei die übrige Gestaltung im wesentlichen derjenigen nach der Ausführungsform nach Fig. 2 entspricht.The embodiment shown in FIGS. 3 and 4 has a tube section 5a made of cardboard with an upper coupling engagement element 7a, which here also by means of staples 22 The tubular body 5a is fastened like the lower coupling receptacle element 8a, the remaining configuration essentially corresponding to that according to the embodiment according to FIG. 2.

In Fig. 5 ist eine andere Befestigungsart der Kupplungselemente 7b bzw. 8b dargestellt, die hier aus thermoplastischem Kunststoff gefertigt sein sollen. Die Befestigungsart ist hier so gewählt, daß mittels einer heißen Spreiznadel zunächst der Karton des Rohrschusses 5b von außen durchstochen wird, so daß ein Loch 23 entsteht. Nunmehr wird die Nadel aufgespreizt zurückgezogen, derart, daß Kunststoffmaterial mit in das Loch 23 eingezogen wird, so daß sich ein Kunststoffnocken 24 bildet. Je nach der gewünschten Belastbarkeit können eine Vielzahl von Kunststoffverbindungsnocken 23 am Umfang erzeugt werden.5 shows another type of fastening of the coupling elements 7b and 8b, which are to be made here from thermoplastic material. The type of fastening is selected here so that the cardboard of the pipe section 5b is first pierced from the outside by means of a hot expanding needle, so that a hole 23 is formed. The needle is now spread apart, so that plastic material is drawn into the hole 23, so that a plastic cam 24 is formed. Depending on the desired load capacity, a large number of plastic connecting cams 23 can be produced on the circumference.

In den Fig. 6 und 7 ist dargestellt, daß im Bereich der reibungserhöhenden Ausriffelung 21c bei den Kupplungselementen 7c bzw. 8c Widerhaken 25 vorgesehen sein können, die gegen die Auszugsrichtung geneigt sind. Auch hier kann je nach der gewünschten Belastbarkeit statt der dargestellten Anzahl an Widerhaken eine Mehrzahl am Umfang verteilt sein.6 and 7 show that barbs 25 can be provided in the area of the friction-increasing fluting 21c in the coupling elements 7c and 8c, which barbs are inclined against the direction of extension. Here too, depending on the desired load capacity, a plurality can be distributed around the circumference instead of the number of barbs shown.

In Fig. 8 ist die Möglichkeit dargestellt, die reibungserhöhende Riffelung durch umlaufende Rippen 26 zu ersetzen. Bei der Montage wird dann das nicht näher dargestellte Kartonrohr des Rohrschusses 5 mittels einer Dampfzange über diese Rippen 26 gedrückt.8 shows the possibility of replacing the friction-increasing corrugation by circumferential ribs 26. The cardboard tube, not shown, is then used during assembly the pipe section 5 pressed by means of a steam tongs over these ribs 26.

Schließlich zeigt Fig. 9, daß die Rippen auch als in Auszugsrichtung angestellte Widerhakenrippen 27 ausgebildet sein können, wobei auch eine Kombination der jeweiligen Sicherungselemente an den Kupplungselementen 8d bzw. 8e vorgesehen sein können.Finally, FIG. 9 shows that the ribs can also be designed as barb ribs 27 set in the pull-out direction, it also being possible to provide a combination of the respective securing elements on the coupling elements 8d and 8e.

Natürlich ist das beschriebene Ausführungsbeispiel noch in vielfacher Hinsicht abzuändern, ohne den Grundgedanken zu verlassen. So kann beispielsweise der mit Ausnehmungen versehene Zylinderwandbereich 15 auch gleichzeitig und alternativ am Kupplungsaufnahmeelement 8 vorgesehen sein. Die Topfböden 9 und 10 können netzartig gestaltet sein und dgl. mehr.Of course, the described embodiment can be modified in many ways without leaving the basic idea. For example, the cylinder wall area 15 provided with recesses can also be provided simultaneously and alternatively on the coupling receiving element 8. The pot bases 9 and 10 can be designed like a net and the like. More.

Claims (9)

Vorrichtung zur Verbindung von in Bohrlöchern absenkbaren, mit Quellton oder dgl. füllbaren Rohrschüssen aus wasserlöslichem Material, mit einem Kupplungsaufnahmeelement an einem Rohrschußende und einem damit korrespondierenden Kupplungseingriffselement am anderen Rohrschußende,
dadurch gekennzeichnet,
daß beide Elemente (7,8) im wesentlichen topfförmig ausgebildet sind mit je einem in das Innere des Rohrschusses (5) ragenden und dort festlegbaren zylindrischen Mantel und daß der Topfboden (9 bzw. 10) wenigstens eine Durchtrittsöffnung (11 bzw. 12) aufweist.Device for connecting pipe sections made of water-soluble material that can be lowered into boreholes and filled with swelling clay or the like, with a coupling receiving element at one pipe section end and a corresponding coupling engagement element at the other pipe section end,
characterized,
that both elements (7, 8) are essentially pot-shaped, each with a cylindrical jacket that projects into the interior of the pipe section (5) and can be fixed there, and that the pot base (9 or 10) has at least one passage opening (11 or 12) . Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Aufnahmeelement (8) an seiner Innenzylinderwandfläche (17) und das Eingriffselement (7) an seiner dort eingreifenden Außenwand (19) mit korrespondierenden Gewindeabschnitten (18 bzw. 20) versehen sind.Device according to claim 1,
characterized,
that the receiving element (8) on its inner cylinder wall surface (17) and the engaging element (7) on its outer wall (19) engaging there are provided with corresponding threaded sections (18 and 20). Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß das Eingriffselement (7) eine Anschlagschulter (14) für das freie Ende (13) des Aufnahmeelementes (8) derart aufweist, daß in der Kupplungslage die beiden parallel zueinander liegenden Topfböden (9,10) einen Abstand ("X"-"Y") zueinander aufweisen.Device according to claim 2,
characterized,
that the engaging element (7) has a stop shoulder (14) for the free end (13) of the receiving element (8) such that the two are parallel to each other in the coupling position lying pot bases (9,10) have a distance ("X" - "Y") from each other. Vorrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß wenigstens ein Bereich (15) der Zylinderwand (19) des Kupplungseingriffselementes (7) in der Gebrauchslage über das Rohrschußende ragt und mit mantelseitigen Durchbrüchen (11a) versehen ist.Device according to one of the preceding claims,
characterized,
that at least one area (15) of the cylinder wall (19) of the coupling engagement element (7) projects over the end of the pipe socket in the position of use and is provided with openings (11a) on the jacket side. Vorrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß die beiden Elemente (7,8) mittels einer reibungserhöhenden Ausriffelung (21) und/oder mittels Heftklammern (22) festgelegt sind.Device according to one of the preceding claims,
characterized,
that the two elements (7, 8) are fixed by means of a friction-increasing fluting (21) and / or by means of staples (22). Vorrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß beide Elemente (7,8) aus einem thermoplastischen Kunststoffmaterial gefertigt sind und mittels einer Heiß-Spreiznadel von innen nach außen gezogenen Kunststoffnocken am Rohrschuß (5) befestigt sind.Device according to one of the preceding claims,
characterized,
that both elements (7, 8) are made of a thermoplastic material and are attached to the pipe section (5) by means of a hot expanding needle, which is drawn from the inside to the outside by plastic cams. Vorrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß die Außenoberfläche im Bereich der reibungserhöhenden Riffelung (21e) zusätzlich mit gegen die Auszugsrichtung gerichteten Widerhaken (25) versehen ist.Device according to one of the preceding claims,
characterized,
that the outer surface in the area of the friction-increasing Corrugation (21e) is additionally provided with barbs (25) directed against the pull-out direction. Vorrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß die Außenoberfläche der beiden Elemente (8) im Kontaktbereich mit dem Rohrschuß (5) mit umlaufenden Rippen (26), insbesondere mit schräg gegen die Auszugsrichtung angestellten Widerhaken-Rippen (27) ausgerüstet ist.Device according to one of the preceding claims,
characterized,
that the outer surface of the two elements (8) in the contact area with the pipe section (5) is equipped with circumferential ribs (26), in particular with barbed ribs (27) which are positioned obliquely against the direction of extension. Vorrichtung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
daß sowohl das Kupplungsaufnahmeelement (8) als auch das Kupplungseingriffselement (7) aus einem physiologisch verträglichen Kunststoff gefertigt sind.Device according to one of the preceding claims,
characterized,
that both the clutch receiving element (8) and the clutch engagement element (7) are made of a physiologically compatible plastic.
EP91115636A 1991-02-09 1991-09-14 Device for connecting tubes insertable into wells and filled with bentonite Expired - Lifetime EP0498925B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9101503U DE9101503U1 (en) 1991-02-09 1991-02-09 Device for connecting pipe sections that can be lowered into boreholes and filled with expanding clay
DE9101503U 1991-02-09

Publications (2)

Publication Number Publication Date
EP0498925A1 true EP0498925A1 (en) 1992-08-19
EP0498925B1 EP0498925B1 (en) 1993-08-11

Family

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EP91115636A Expired - Lifetime EP0498925B1 (en) 1991-02-09 1991-09-14 Device for connecting tubes insertable into wells and filled with bentonite

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EP (1) EP0498925B1 (en)
AT (1) ATE93003T1 (en)
DE (3) DE9101503U1 (en)
DK (1) DK0498925T3 (en)
ES (1) ES2045997T3 (en)

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CN111441742A (en) * 2020-05-13 2020-07-24 中国石油集团渤海钻探工程有限公司 Soluble bridge plug seat sealing head bag

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DE9208672U1 (en) * 1992-06-27 1992-09-03 Ditom Kunststoffentwicklungs- u. -vertriebsges. mbH, 4400 Münster Device for connecting pipe sections that can be lowered into boreholes and filled with expanding clay
DE4439546C1 (en) * 1994-11-05 1996-02-01 Geo Bohrtechnik Gmbh Method for permanent closure of earth drillings

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DE9105341U1 (en) * 1990-05-04 1991-08-08 Eijkelkamp Agrisearch Equipment B.V., Griesbeek A tubular casing for sealing material

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US2416142A (en) * 1943-01-26 1947-02-18 Hercules Powder Co Ltd Adjustable lined container having interchangeable screw-threaded sections
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DE9105341U1 (en) * 1990-05-04 1991-08-08 Eijkelkamp Agrisearch Equipment B.V., Griesbeek A tubular casing for sealing material

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN111441742A (en) * 2020-05-13 2020-07-24 中国石油集团渤海钻探工程有限公司 Soluble bridge plug seat sealing head bag

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DE59100291D1 (en) 1993-09-16
DE9201520U1 (en) 1992-04-09
ATE93003T1 (en) 1993-08-15
ES2045997T3 (en) 1994-01-16
DK0498925T3 (en) 1994-08-01
EP0498925B1 (en) 1993-08-11
DE9101503U1 (en) 1991-05-02

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