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EP1685308B1 - Perforation gun system producing self-closing perforation holes - Google Patents

Perforation gun system producing self-closing perforation holes Download PDF

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Publication number
EP1685308B1
EP1685308B1 EP04765481A EP04765481A EP1685308B1 EP 1685308 B1 EP1685308 B1 EP 1685308B1 EP 04765481 A EP04765481 A EP 04765481A EP 04765481 A EP04765481 A EP 04765481A EP 1685308 B1 EP1685308 B1 EP 1685308B1
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EP
European Patent Office
Prior art keywords
gun barrel
sliding tube
perforation
gun
perforators
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
EP04765481A
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German (de)
French (fr)
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EP1685308A1 (en
Inventor
Rolf Rospek
Malte Veehmayer
Wilfried KRAUTHÄUSER
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DynaEnergetics GmbH and Co KG
Original Assignee
DynaEnergetics GmbH and Co KG
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Priority claimed from DE102004043948A external-priority patent/DE102004043948A1/en
Application filed by DynaEnergetics GmbH and Co KG filed Critical DynaEnergetics GmbH and Co KG
Publication of EP1685308A1 publication Critical patent/EP1685308A1/en
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Publication of EP1685308B1 publication Critical patent/EP1685308B1/en
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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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/119—Details, e.g. for locating perforating place or direction

Definitions

  • the invention relates to a perforation gun according to the preambles of claims 1 and 3.
  • Perforation guns are used in deep hole blasting in the oil and gas industry to connect the well to the storage horizon.
  • a perforation gun consists of an outer cannon tube in the interior of perforators - usually hollow or Gechossladungen - are arranged, which shoot when ignited radially outward through the gun barrel. In the gun barrel remain bullet holes after the shot.
  • a detonating cord leads through the gun barrel, which causes the perforators to ignite when ignited.
  • the invention is based on the object to improve a perforation gun according to the preamble of claim 1 so that with simple and safe Means escape of fragments from the gun barrel is avoided in the bore.
  • this object is achieved in a first embodiment in that the means for automatically closing comprise cartridges with a swellable 2-component foam and these cartridges are arranged in the gun barrel and are breakable by the ignited detonating cord, whereby foam escapes from the cartridges, swells and the bullet holes clogged.
  • a cartridge is arranged adjacent to a perforator.
  • the sliding tube is fixed in its initial position via a securing element which breaks open after ignition of the detonating cord and releases the displacement of the sliding tube.
  • the adjusting device may be a tensioned spring or a pyrotechnic element which can be ignited by the detonating cord.
  • the sliding tube is closed on the side in which it is to move, and is open on the other side, whereby the sliding tube is formed like a piston, which is displaceable by the pressure building up by the ignition of the perforators.
  • a fluid is arranged between the sliding tube and the gun barrel. With this fluid, the timing of the radial expansion of the sliding tube can be controlled.
  • FIG. 1 shows a gun barrel 1 of a perforating gun for use in the petroleum and natural gas industry for connecting a well to the storage horizon.
  • the gun barrel 1 is closed at its two ends by a respective connector or termination 18.
  • a sliding tube 4 and therein a charge carrier 9 is arranged, are attached to the perforators 10.
  • these perforators are 10 shaped charges.
  • a detonating cord 11 is guided to the respective ignition points of the perforators 10.
  • the detonating cord 11 is guided by the connectors or terminations 18 in the interior of the perforation gun.
  • the inner tube or the sliding tube 4 is z at one end. B. closed by a cap 5. Adjacent to the cap 5 is a securing element 7, here a shear pin, which fixes the sliding tube 4 before the shot in such a way that the sliding tube 4 can not move in the gun barrel 1 in the longitudinal direction.
  • a securing element 7, here a shear pin Adjacent to the cap 5 is a securing element 7, here a shear pin, which fixes the sliding tube 4 before the shot in such a way that the sliding tube 4 can not move in the gun barrel 1 in the longitudinal direction.
  • predetermined breaking points 3 can be introduced so that after the ignition of the perforators 10, the forming hollow charge jet 12 (see FIG. 2) can penetrate the gun barrel 1 unhindered.
  • Fig. 2 shows a section of the perforation gun immediately after ignition.
  • the detonating cord 11 has ignited the perforators 10.
  • the forming hollow charge jet or shaped charge jet 12 has penetrated the sliding tube 4 and the gun barrel 1.
  • the metal housing of the perforators 10 disassemble and form fragments and fragments that form part of the "debris".
  • Figure 3 shows a section of the perforation gun immediately after the shot.
  • the shaped charge jet 12 has penetrated the sliding tube 4 at the bullet hole 14 and the gun barrel 1 at the bullet hole 13.
  • a pressure has built up. This pressure acts on the sliding tube 4 in the direction of the securing element 7, since the sliding tube 4 is closed on the side of the securing element 5 by a cap 5 and is open on the opposite side.
  • "debris" 17 has formed.
  • Figure 4 shows a section of the perforation gun after the shot. Due to the pressure in the sliding tube 4, the securing element 7 has been sheared off, as a result of which the sliding tube 4 has displaced as far as the adjacent connector or termination 18. As a result, the remaining small parts or the debris 17 can not leave the gun barrel 1. Not shown is that Inner tube 4 inflated after the shot and thus has wedged with the gun barrel 1.
  • the invention thus consists of a mechanism which closes the perforation holes or through holes 13 in the gun wall 2 after the shot and thus prevents the "debris" 17 from escaping.
  • Foam cartridges or, as described, a pusher or rotation mechanism may serve as the closure mechanism.
  • some perforators 10 are replaced by 2-component foam cartridges. Through the detonating cord 11 which ignites the perforators or charges 10, the cartridge is brought to the implementation, the foam swells up and clogs the bullet holes thirteenth
  • a second tube, a pusher tube 4 is used in the gun, which is slid after passage through at least the diameter of the bullet hole 13 (either longitudinally, slide mechanism or transversely, rotation mechanism).
  • the displacement is indicated by an X (see reference numeral 8).
  • the sliding tube 4 is fixed in the starting position via a securing element 7, the z. B. is destroyed by the detonating cord 11. As a fuse element 7 z. As bolts, circlips or screws serve. The destruction can z. B. also via a pyrotechnic element - possibly with delay set - done.
  • the internal pressure in the gun after the shot may also be caused by the reaction products of the explosives in the perforators 10. If the sliding tube 4 is closed on the side to which it is to move and kept open on the other side, this sliding tube 4 can move like a piston. The internal pressure can relieve itself only through the perforation holes 14 and the passages 6 for the detonating cord 11. The time until complete pressure reduction is sufficient to move the sliding tube 4 and thus to close the bullet holes 13, 14. At the same time, the gas pressure inflates the pusher tube 4 (also known as conventional guns under the term "gun swell"). The expanding sliding tube 4 can become wedged with the inner wall of the outer tube or cannon tube 1 and thus can not slip back. The time of this expansion can z. B. be controlled by a fluid between the inner and outer walls. For this purpose, z. As fat or silicone oil can be used.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Toys (AREA)
  • Nozzles (AREA)
  • Devices For Opening Bottles Or Cans (AREA)
  • Catching Or Destruction (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Punching Or Piercing (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

A perforation gun includes an external gun barrel in the interior of which perforators are located which can be ignited via a fuse extending through the gun barrel and which, after ignition, pierce the gun barrel with perforation holes. A sliding tube or a swellable two-component foam is provided which automatically closes the perforation holes. The swellable two-component foam can be provided in a cartridge located inside the gun barrel and can be broken up by the ignited fuse, thereby allowing foam to escape from the cartridges, allowing it to swell and obliterate the perforation holes. The sliding tube can be displaced after perforation by an adjusting device by at least the diameter of the perforation hole, the sliding tube being located coaxially between the perforators and the gun barrel.

Description

Die Erfindung betrifft eine Perforationskanone nach den Oberbegriffen der Ansprüche 1 und 3.The invention relates to a perforation gun according to the preambles of claims 1 and 3.

Perforationskanonen werden in Tiefbohrlochsprengungen in der Erdöl- und Erdgasindustrie zur Anbindung der Bohrung an den Speicherhorizont eingesetzt.Perforation guns are used in deep hole blasting in the oil and gas industry to connect the well to the storage horizon.

Eine Perforationskanone besteht aus einem äußeren Kanonenrohr in dessen Innerem Perforatoren - üblicherweise Hohl- oder Gechossladungen - angeordnet sind, die bei Zündung radial nach außen durch das Kanonenrohr schießen. Im Kanonenrohr verbleiben nach dem Schuß Durchschusslöcher.A perforation gun consists of an outer cannon tube in the interior of perforators - usually hollow or Gechossladungen - are arranged, which shoot when ignited radially outward through the gun barrel. In the gun barrel remain bullet holes after the shot.

Zur Zündung der Perforatoren führt eine Sprengschnur durch das Kanonenrohr, welche bei Zündung die Perforatoren zur Zündung veranlasst.To ignite the perforators a detonating cord leads through the gun barrel, which causes the perforators to ignite when ignited.

Problematisch bei diesem Verfahren sind Rest- und Bruchstücke der Perforatoren und der Bauteile im Inneren des Kanonenrohrs, die nach dem Schuss durch die Durchschusslöcher in die Bohrung fallen können. Um diesen "debris" (Bruchstücke der Perforatoren) zu vermeiden wird in der WO 00/49 271 vorgeschlagen, zum selbstständigen Verschließen der Durchschusslöcher ein außerhalb des Kanonenrohrs auf der Außenwand des Kanonenrohrs aufliegendes verschiebbares Schieberohr nach dem Schuss durch eine Verstellvorrichtung um mindestens den Durchmesser des Durchschusslochs zu verschieben. Dieses System hat in Horizontalbohrungen Nachteile, da hier das Schieberohr auf der "Casing Innenwandung" aufliegt und dadurch ein Verschieben des Schieberohrs erschwert ist. Mit Casing ist das in die Bohrung eingebrachte äußerste Rohr gemeint, in das die Perforationskanone eingelassen wird.The problem with this method are residues and fragments of the perforators and the components inside the gun barrel that can fall into the hole after the shot through the bullet holes. To avoid this "debris" (fragments of perforators) is used in the WO 00/49 271 proposed for self-closing the bullet holes a displaceable sliding tube resting on the outer wall of the gun pipe after the shotgun by an adjusting device to move at least the diameter of the bullet hole. This system has disadvantages in horizontal bores, since here the sliding tube rests on the "casing inner wall" and thus a shifting of the sliding tube is difficult. By casing is meant the outermost tube inserted into the bore into which the perforating gun is inserted.

Der Erfindung liegt die Aufgabe zu Grunde, eine Perforationskanone nach dem Oberbegriff des Anspruchs 1 so zu verbessern, dass mit einfachen und sicheren Mitteln ein Austreten von Bruchstücken aus dem Kanonenrohr in die Bohrung vermieden wird.The invention is based on the object to improve a perforation gun according to the preamble of claim 1 so that with simple and safe Means escape of fragments from the gun barrel is avoided in the bore.

Erfindungsgemäß wird diese Aufgabe in einer ersten Ausführungsform dadurch gelöst, dass die Mittel zum selbsttätigen Verschließen Kartuschen mit einem quellfähigen 2-Komponenten-Schaum umfassen und diese Kartuschen im Kanonenrohr angeordnet sind und durch die gezündete Sprengschnur aufbrechbar sind, wodurch Schaum aus den Kartuschen austritt, aufquillt und die Durchschusslöcher verstopft.According to the invention, this object is achieved in a first embodiment in that the means for automatically closing comprise cartridges with a swellable 2-component foam and these cartridges are arranged in the gun barrel and are breakable by the ignited detonating cord, whereby foam escapes from the cartridges, swells and the bullet holes clogged.

In bevorzugter Ausführungsform ist jeweils einem Perforator eine Kartusche benachbart angeordnet.In a preferred embodiment, a cartridge is arranged adjacent to a perforator.

Bei Perforationskanonen nach dem Oberbegriff des Anspruchs 3, d. h. Perforationskanonen mit einem äußeren Kanonenrohr, in dessen Inneren Perforatoren angeordnet sind, die über eine durch das Kanonenrohr führende Sprengschnur zündbar sind und nach Zündung das Kanonenrohr an Durchschusslöchern durchschlagen, wobei Mittel zum selbsttätigen Verschließen der Durchschusslöcher vorgesehen sind und diese Mittel ein Schieberohr umfassen, welches nach dem Durchschuss durch eine Verstellvorrichtung um mindestens den Durchmesser des Durchschussloches verschiebbar ist, wird vorgeschlagen, dass das Schieberohr koaxial zwischen den Perforatoren und dem Kanonenrohr angeordnet ist. Hierdurch wird mit einfachen und sicheren Mitteln ein Austreten von Bruchstücken aus dem Kanonenrohr in die Bohrung vermieden. Bei Horizontalbohrungen, bei denen die Außenwand auf der Casing Innenwandung aufliegt, ist ein Verschieben des Schieberohrs sicher möglich.In Perforationskanonen according to the preamble of claim 3, d. H. Perforating guns with an outer cannon tube, inside which perforators are arranged, which are ignitable via a gun barrel leading detonating cord and strike the cannon tube at firing holes on ignition, means for automatically closing the bullet holes are provided and these means comprise a sliding tube, which after the passage through an adjusting device is displaceable by at least the diameter of the bullet hole, it is proposed that the sliding tube is arranged coaxially between the perforators and the gun barrel. As a result, escape of fragments from the gun barrel into the bore is avoided by simple and secure means. In horizontal bores, where the outer wall rests on the Casing inner wall, a sliding of the sliding tube is certainly possible.

In bevorzugter Ausführungsform ist das Schieberohr in seiner Ausgangsposition über ein Sicherungselement fixiert, welches nach Zündung der Sprengschnur aufbricht und die Verschiebung des Schieberohrs freigibt.In a preferred embodiment, the sliding tube is fixed in its initial position via a securing element which breaks open after ignition of the detonating cord and releases the displacement of the sliding tube.

Die Verstellvorrichtung kann eine gespannte Feder oder ein durch die Sprengschnur zündbares pyrotechnisches Element sein.The adjusting device may be a tensioned spring or a pyrotechnic element which can be ignited by the detonating cord.

In bevorzugter Ausführungsform ist das Schieberohr auf der Seite, in die es sich verschieben soll, verschlossen und ist auf der anderen Seite offen, wodurch das Schieberohr wie ein Kolben ausgebildet ist, der durch den sich durch die Zündung der Perforatoren aufbauenden Druck verschiebbar ist.In a preferred embodiment, the sliding tube is closed on the side in which it is to move, and is open on the other side, whereby the sliding tube is formed like a piston, which is displaceable by the pressure building up by the ignition of the perforators.

Zur Fixierung des Schieberohrs nach dem Verschieben wird vorgeschlagen, dass das Schieberohr eine Wandstärke aufweist, die eine radiale Ausdehnung durch den im Kanonenrohr aufgebauten Druck nach der Zündung der Perforatoren zulässt.To fix the sliding tube after the displacement, it is proposed that the sliding tube has a wall thickness which allows a radial expansion through the pressure built up in the cannon tube after the ignition of the perforators.

Vorteilhafterweise ist zwischen dem Schieberohr und dem Kanonenrohr ein Fluid angeordnet. Mit diesem Fluid kann der Zeitpunkt der radialen Ausdehnung des Schieberohrs gesteuert werden.Advantageously, a fluid is arranged between the sliding tube and the gun barrel. With this fluid, the timing of the radial expansion of the sliding tube can be controlled.

Nachfolgend wird eine Ausführungsform der Erfindung an Hand von vier Figuren näher erläutert.Hereinafter, an embodiment of the invention will be explained in more detail with reference to four figures.

Figur 1 zeigt ein Kanonenrohr 1 einer Perforationskanone zur Verwendung in der Erdöl- und Erdgasindustrie zur Anbindung einer Bohrung an den Speicherhorizont. Das Kanonenrohr 1 ist an seinen beiden Enden durch jeweils einen Verbinder oder Abschluß 18 verschlossen. Im Inneren des Kanonenrohrs 1 ist ein Schieberohr 4 und darin ein Ladungsträger 9 angeordnet, an dem Perforatoren 10 befestigt sind. In den gezeigten Figuren sind diese Perforatoren 10 Hohlladungen. Zur Zündung dieser Perforatoren 10 ist eine Sprengschnur 11 an die jeweiligen Anzündpunkte der Perforatoren 10 geführt. Die Sprengschnur 11 ist durch die Verbinder oder Abschlüsse 18 in das Innere der Perforationskanone geführt.Figure 1 shows a gun barrel 1 of a perforating gun for use in the petroleum and natural gas industry for connecting a well to the storage horizon. The gun barrel 1 is closed at its two ends by a respective connector or termination 18. Inside the gun barrel 1 a sliding tube 4 and therein a charge carrier 9 is arranged, are attached to the perforators 10. In the figures shown, these perforators are 10 shaped charges. To ignite these perforators 10, a detonating cord 11 is guided to the respective ignition points of the perforators 10. The detonating cord 11 is guided by the connectors or terminations 18 in the interior of the perforation gun.

Das Innenrohr bzw. das Schieberohr 4 ist an einem Ende z. B. durch eine Kappe 5 verschlossen. Angrenzend an die Kappe 5 befindet sich ein Sicherungselement 7, hier ein Scherstift, der das Schieberohr 4 vor dem Schuß derart befestigt, dass sich das Schieberohr 4 nicht im Kanonenrohr 1 in Längsrichtung verschieben kann.The inner tube or the sliding tube 4 is z at one end. B. closed by a cap 5. Adjacent to the cap 5 is a securing element 7, here a shear pin, which fixes the sliding tube 4 before the shot in such a way that the sliding tube 4 can not move in the gun barrel 1 in the longitudinal direction.

Im Kanonenrohr 1, gegenüber den Perforatoren 10, können Sollbruchstellen 3 eingebracht sein, so dass nach der Zündung der Perforatoren 10 der sich bildende Hohlladungsstrahl 12 (siehe Figur 2) ungehindert das Kanonenrohr 1 durchschlagen kann.In the gun barrel 1, opposite the perforators 10, predetermined breaking points 3 can be introduced so that after the ignition of the perforators 10, the forming hollow charge jet 12 (see FIG. 2) can penetrate the gun barrel 1 unhindered.

Fig. 2 zeigt einen Ausschnitt aus der Perforationskanone unmittelbar nach der Zündung. Die Sprengschnur 11 hat die Perforatoren 10 gezündet. Der sich ausbildende Hohlladungsstrahl bzw. Hohlladungsjet 12 hat das Schieberohr 4 und das Kanonenrohr 1 durchschlagen. Die Metallgehäuse der Perforatoren 10 zerlegen sich dabei und bilden Splitter- und Bruchstücke, die einen Teil des "debris" bilden.Fig. 2 shows a section of the perforation gun immediately after ignition. The detonating cord 11 has ignited the perforators 10. The forming hollow charge jet or shaped charge jet 12 has penetrated the sliding tube 4 and the gun barrel 1. The metal housing of the perforators 10 disassemble and form fragments and fragments that form part of the "debris".

Figur 3 zeigt einen Ausschnitt aus der Perforationskanone unmittelbar nach dem Schuß. Der Hohlladungsstrahl 12 hat das Schieberohr 4 am Durchschußloch 14 und das Kanonenrohr 1 am Durchschußloch 13 durchschlagen. Im Inneren des Schieberohrs 4 hat sich ein Druck aufgebaut. Dieser Druck beaufschlagt das Schieberohr 4 in die Richtung des Sicherungselements 7, da dass Schieberohr 4 an der Seite des Sicherungselements 5 durch eine Kappe 5 verschlossen ist und an der entgegengesetzten Seite offen ist. Im Inneren hat sich "debris" 17 gebildet.Figure 3 shows a section of the perforation gun immediately after the shot. The shaped charge jet 12 has penetrated the sliding tube 4 at the bullet hole 14 and the gun barrel 1 at the bullet hole 13. Inside the sliding tube 4, a pressure has built up. This pressure acts on the sliding tube 4 in the direction of the securing element 7, since the sliding tube 4 is closed on the side of the securing element 5 by a cap 5 and is open on the opposite side. Inside, "debris" 17 has formed.

Figur 4 zeigt einen Ausschnitt aus der Perforationskanone nach dem Schuß. Durch den Druck im Schieberohr 4 ist das Sicherungselement 7 abgeschert worden, wodurch das Schieberohr 4 sich bis an den naheliegenden Verbinder oder Abschluß 18 verschoben hat. Dadurch können die verbleibenden Kleinteile bzw. der debris 17 nicht das Kanonenrohr 1 verlassen. Nicht gezeigt ist, dass sich das Innenrohr 4 nach dem Schuß aufgebläht und damit mit dem Kanonenrohr 1 verkeilt hat.Figure 4 shows a section of the perforation gun after the shot. Due to the pressure in the sliding tube 4, the securing element 7 has been sheared off, as a result of which the sliding tube 4 has displaced as far as the adjacent connector or termination 18. As a result, the remaining small parts or the debris 17 can not leave the gun barrel 1. Not shown is that Inner tube 4 inflated after the shot and thus has wedged with the gun barrel 1.

Die Erfindung besteht also aus einem Mechanismus, der nach dem Schuss die Perforationslöcher bzw. Durchschußlöcher 13 in der Kanonenwandung 2 verschließt und somit ein Austreten des "debris" 17 verhindert. Als Verschlussmechanismus können Schaumkartuschen oder wie beschrieben, ein Schieber- oder Rotationsmechanismus dienen. Im Falle der Schaumkartuschen werden einige Perforatoren 10 durch Kartuschen mit 2-Komponenten Schaum ersetzt. Durch die Sprengschnur 11, die die Perforatoren bzw. Ladungen 10 zündet, wird die Kartusche zur Umsetzung gebracht, der Schaum quillt auf und verstopft die Durchschusslöcher 13.The invention thus consists of a mechanism which closes the perforation holes or through holes 13 in the gun wall 2 after the shot and thus prevents the "debris" 17 from escaping. Foam cartridges or, as described, a pusher or rotation mechanism may serve as the closure mechanism. In the case of the foam cartridges, some perforators 10 are replaced by 2-component foam cartridges. Through the detonating cord 11 which ignites the perforators or charges 10, the cartridge is brought to the implementation, the foam swells up and clogs the bullet holes thirteenth

Beim Einsatz eines Schiebe- oder Rotationsmechanismus wird in die Kanone ein zweites Rohr, ein Schieberohr 4 eingesetzt, welches nach dem Durchschuss um mindestens den Durchmesser des Durchschusslochs 13 verschoben wird (entweder longitudinal; Schiebermechanismus oder transversal, Rotationsmechanismus). In Figur 1 ist der Verschiebeweg durch ein X (siehe Bezugszeichen 8) gekennzeichnet. Zur Bewegung des Innenrohrs bzw. zweiten Rohrs oder Schieberohrs 4 nach dem Schuss kann eine vorgespannte Feder dienen. Das Schieberohr 4 wird in der Ausgangsposition über ein Sicherungselement 7 fixiert, das z. B. durch die Sprengschnur 11 zerstört wird. Als Sicherungselement 7 können z. B. Bolzen, Sprengringe oder Schrauben dienen. Die Zerstörung kann z. B. auch über ein pyrotechnisches Element - eventuell auch mit Verzögerungssatz - erfolgen. Zur Bewegung des Schiebermechanismus bzw. des Schieberohrs 5 kann auch der Innendruck in der Kanone nach dem Schuss verursacht durch die Reaktionsprodukte der Explosivstoffe in den Perforatoren 10 dienen. Wird das Schieberohr 4 auf der Seite, in die es sich bewegen soll verschlossen und auf der anderen Seite geöffnet gehalten, kann sich dieses Schieberohr 4 wie ein Kolben bewegen. Der Innendruck kann sich nur durch die Perforationslöcher 14 und die Durchführungen 6 für die Sprengschnur 11 entlasten. Die Zeit bis zum vollständigen Druckabbau ist ausreichend um das Schieberohr 4 zu verschieben und somit die Durchschusslöcher 13, 14 zu verschließen. Gleichzeitig bewirkt der Gasdruck ein Aufblähen des Schieberohrs 4 (bekannt auch für herkömmliche Perforationskanonen unter dem Begriff "Gun Swell"). Das sich ausdehnende Schieberohr 4 kann sich mit der Innenwandung des Außenrohrs bzw. Kanonenrohrs 1 verkeilen und kann somit nicht zurückrutschen. Der Zeitpunkt dieser Ausdehnung kann z. B. über ein Fluid zwischen Innen- und Außenwandung kontrolliert werden. Hierzu kann z. B. Fett oder Silikonöl verwendet werden.When using a sliding or rotating mechanism, a second tube, a pusher tube 4, is used in the gun, which is slid after passage through at least the diameter of the bullet hole 13 (either longitudinally, slide mechanism or transversely, rotation mechanism). In Figure 1, the displacement is indicated by an X (see reference numeral 8). For the movement of the inner tube or second tube or sliding tube 4 after the shot can serve a prestressed spring. The sliding tube 4 is fixed in the starting position via a securing element 7, the z. B. is destroyed by the detonating cord 11. As a fuse element 7 z. As bolts, circlips or screws serve. The destruction can z. B. also via a pyrotechnic element - possibly with delay set - done. In order to move the slider mechanism 5, the internal pressure in the gun after the shot may also be caused by the reaction products of the explosives in the perforators 10. If the sliding tube 4 is closed on the side to which it is to move and kept open on the other side, this sliding tube 4 can move like a piston. The internal pressure can relieve itself only through the perforation holes 14 and the passages 6 for the detonating cord 11. The time until complete pressure reduction is sufficient to move the sliding tube 4 and thus to close the bullet holes 13, 14. At the same time, the gas pressure inflates the pusher tube 4 (also known as conventional guns under the term "gun swell"). The expanding sliding tube 4 can become wedged with the inner wall of the outer tube or cannon tube 1 and thus can not slip back. The time of this expansion can z. B. be controlled by a fluid between the inner and outer walls. For this purpose, z. As fat or silicone oil can be used.

Claims (9)

  1. A perforation gun having an outer gun barrel (1), arranged in the interior of which there are perforators (10) that can be ignited by way of a fuse (11) leading through the gun barrel (1) and after ignition pierce the gun barrel (1) at penetration holes (13), wherein means are provided for the automatic closure of the penetration holes (13), characterised in that the means for the automatic closure comprise cartridges with a swellable two-component foam and these cartridges are arranged in the gun barrel (1) and can be broken up by means of the ignited fuse (11), as a result of which foam emerges out of the cartridges, swells up and blocks the penetration holes (13).
  2. A perforation gun according to claim 1, characterised in that a cartridge is arranged next to each perforator (10).
  3. A perforation gun having an outer gun barrel (1), arranged in the interior of which there are perforators (10) that can be ignited by way of a fuse (11) leading through the gun barrel (1) and after ignition pierce the gun barrel (1) at penetration holes (13), wherein means are provided for automatically closing the penetration holes (13), and these means comprise a sliding tube (4) which can be displaced by means of an adjusting arrangement by at least the diameter of the penetration hole (13) after the penetration, characterised in that the sliding tube (4) is arranged coaxially between the perforators (10) and the gun barrel (1).
  4. A perforation gun according to claim 3, characterised in that the sliding tube (4) is fixed in its starting position by way of a securing element (7) that breaks up after ignition of the fuse (11) and enables the displacement of the sliding tube (4).
  5. A perforation gun according to claim 3 or 4, characterised in that the adjusting arrangement is a tensioned spring.
  6. A perforation gun according to one of claims 3 to 5, characterised in that the adjusting arrangement is a pyrotechnic element that can be ignited by means of the fuse (11).
  7. A perforation gun according to one of claims 3 to 6, characterised in that the sliding tube (4) is closed on the side to which it is to be displaced and is open on the other side and as a result can be displaced like a plunger by means of the pressure building up as a result of the ignition of the perforators (10).
  8. A perforation gun according to one of claims 3 to 7, characterised in that the sliding tube (4) has a wall thickness that permits radial expansion and thus fixation in the gun barrel (1) after the sliding tube (4) has been displaced as a result of the pressure that has built up in the gun barrel (1) after the ignition of the perforators (10).
  9. A perforation gun according to one of claims 3 to 8, characterised in that a fluid is arranged between the sliding tube (4) and the gun barrel (1).
EP04765481A 2003-09-27 2004-09-22 Perforation gun system producing self-closing perforation holes Expired - Lifetime EP1685308B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10344958 2003-09-27
DE102004004750 2004-01-30
DE102004011616 2004-03-10
DE102004043948A DE102004043948A1 (en) 2003-09-27 2004-09-11 Perforation gun used in well drill hole explosions in the crude oil and natural gas industry comprises elements for automatically closing the perforation holes and consisting of cartridges containing a swellable two-component foam
PCT/EP2004/010609 WO2005033472A1 (en) 2003-09-27 2004-09-22 Perforation gun system producing self-closing perforation holes

Publications (2)

Publication Number Publication Date
EP1685308A1 EP1685308A1 (en) 2006-08-02
EP1685308B1 true EP1685308B1 (en) 2007-10-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04765481A Expired - Lifetime EP1685308B1 (en) 2003-09-27 2004-09-22 Perforation gun system producing self-closing perforation holes

Country Status (7)

Country Link
US (1) US7607379B2 (en)
EP (1) EP1685308B1 (en)
AT (1) ATE375435T1 (en)
CA (1) CA2539244C (en)
DE (1) DE502004005228D1 (en)
NO (1) NO336706B1 (en)
WO (1) WO2005033472A1 (en)

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US8356666B2 (en) 2010-01-19 2013-01-22 Halliburton Energy Services, Inc Wellbore perforation tool
CN102031952B (en) * 2010-11-26 2013-12-25 中国航天科技集团公司川南机械厂 Multi-stage perforation supercharging method
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US10689955B1 (en) 2019-03-05 2020-06-23 SWM International Inc. Intelligent downhole perforating gun tube and components
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US12000267B2 (en) 2021-09-24 2024-06-04 DynaEnergetics Europe GmbH Communication and location system for an autonomous frack system
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WO2011045021A2 (en) 2009-10-13 2011-04-21 Dynaenergetics Gmbh & Co. Kg Perforating gun having self-closing penetration holes

Also Published As

Publication number Publication date
NO336706B1 (en) 2015-10-26
CA2539244C (en) 2012-02-21
EP1685308A1 (en) 2006-08-02
CA2539244A1 (en) 2005-04-14
US7607379B2 (en) 2009-10-27
ATE375435T1 (en) 2007-10-15
WO2005033472A1 (en) 2005-04-14
NO20061842L (en) 2006-06-16
US20070107589A1 (en) 2007-05-17
DE502004005228D1 (en) 2007-11-22

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