EP1166037B1 - Verfahren zum auslösen von zündern über eine leitung grosser länge - Google Patents
Verfahren zum auslösen von zündern über eine leitung grosser länge Download PDFInfo
- Publication number
- EP1166037B1 EP1166037B1 EP00920468A EP00920468A EP1166037B1 EP 1166037 B1 EP1166037 B1 EP 1166037B1 EP 00920468 A EP00920468 A EP 00920468A EP 00920468 A EP00920468 A EP 00920468A EP 1166037 B1 EP1166037 B1 EP 1166037B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- detonators
- line
- triggering
- detonator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
Definitions
- the invention relates to a method for triggering detonators via a line great length.
- Drilling for the exploration and digestion of oil and gas fields extend over lengths, especially horizontally already well over 10000 m transcend.
- the hole is usually at several predetermined locations perforated to allow access, for example, of oil to the wellbore. Other blasts loosen the rock around the hole to the To facilitate inflow of oil to the wellbore.
- the provided appropriate explosive charges positioned with detonators be ignited in a predetermined order.
- Such a Ignition circuit is known for example from EP 0 588 685 B1.
- the detonators will be each individually controlled and then triggered.
- the ignition signal consists of a Information component for addressing and unlocking the individual detonators and an energy component that triggers the ignition.
- DE-OS 23 56 875 a circuit arrangement for generating time successive surges, which, inter alia, for each other the following ignition of explosive devices can be used, with several each generating a surge of a series of power surges Surge units are connected in series. There are two signals different delay time generated, of which with the shorter time to Recharging Energyspeichem and with the longer time exclusively for Connecting the serving as an energy source for the surge energy storage with the detonator serves.
- the information transfer reaches its limits.
- the signals of the transmitted data can be so be distorted so that the detonator does not recognize the signals and does not fire the ignition becomes.
- the distortion of the signals is primarily due to the lack of edge steepness caused between the polarity changes of the rated voltage.
- the cause of these disturbances lie in the capacitive and inductive behavior of the long line as well as the detonators upstream consumers such as the Feed drive of the drill head in the horizontal direction, its protective relay, the Auxiliary tools and positioning. These consumers are over the same line is supplied with energy over which the detonators are triggered.
- the discharging capacities of consumers are affected by this voltage charged. The result is a voltage drop and therefore requires a Signal attenuation.
- the effects of capacitive resistances on the Signals of the detonator device thereby reduced that before the release of the Igniter on the line to the detonators a DC voltage is switched on, with the capacity of consumers are charged to such a level that in the subsequent generation of the signals for triggering the detonator the Consumer capacity is no longer effective.
- the capacities of Consumers will recharge themselves after being charged, but the one before Charging to a high level ensures that at least until the time of Triggering of the last igniter no charging losses due to the charge Capacities done. This reduces the time required to generate the signals Rated voltage not below its required level.
- the switched DC voltage is higher as the rated voltage for generating the signals.
- the Rated voltage 24 volts it can charge a capacity of 28 for charging the capacity Voltage DC be provided.
- a corresponding time may be provided for in which the increased voltage is switched. In the proposed example would be a switch-on of about 5 seconds advantageous.
- the increased voltage is below a critical voltage which can cause the triggering of an igniter.
- the detonators are usually like that they are designed to be of a certain magnitude above the rated voltage required for Generating the signals intended to trigger a detonator, are resistant, without it triggering. According to the invention, however, the intended Tolerance range not exhausted to avoid any risk, on the other hand the amount of voltage is chosen so that within a very short time intended to boost the capacity of consumers.
- the capacitive resistances vary depending on the length of the pipe and the hole different and additional consumers connected to it, it is advantageous if, prior to charging the capacity of the consumer of Capacitive resistance is determined and depending on its size for charging the capacity is determined at least required DC voltage. This is ensures that no the critical value of the voltage for triggering a Igniter is exceeded.
- the réellesaltende DC voltage can thus be tailored to the particular application.
- the line to the detonators with their additionally connected consumers provides due to the inductances and capacities a resonant circuit with a Low-pass filter effect.
- the low-pass filter effect is in particular by the Capacities affected.
- By determining the capacitive resistance can be determine the critical frequency at which the low-pass filter effect occurs. Thereupon becomes a suitable signal frequency is chosen to make the low pass filter effect effective excluded. It is inventively such a reduced frequency chosen that in each period, the voltage rises again up to the final voltage. Furthermore, this voltage must over a predetermined time until the next Polarity change at their nominal level, so that the characteristic Signaling is retained and the polarity change of the signal receivers the detonator can also be detected.
- FIG. 1 shows the equivalent circuit diagram of a borehole assembly with detonators and additional consumers.
- From the detonator device 2 leads a conduit 3 with two strands 3a and 3b to the detonators 4a, 4b and 4c. Assigned to them are each to be ignited charges 5a, 5b and 5c.
- the additional consumers are as ohmic resistors 6, inductive resistors. 7 and capacitive resistors 8 symbolizes. It is for example the Feed drive of the drill head, its protective relay, the auxiliary tools and the Positioning. To supply in particular the feed drive of Drill head is a higher voltage required than to generate the Trigger the detonator necessary signals.
- the voltage source for supply this additional consumer is designated 9.
- Denoted by 10 is a Circuit breaker with which the igniter 4a to 4c during the supply of the rest Consumer via the voltage source 9 of the strands 3a and 3b be separated.
- a steering means 11 is designated, with, as by a Line 12 indicated, the circuit breaker 10 can be operated.
- To the Disconnect voltage source 9 from the consumer is another switch 13th provided, which, as indicated by the line 14, from the control device 11th can be operated.
- FIG. 2 shows the conventional course of a signal on arrival at a detonator in a voltage-time diagram (U, t).
- a DC voltage of the voltage source 15 in the amount U n + is applied by the fuze triggering device 2 to the line 3. It is the nominal voltage required to generate the signals.
- the signal sequence begins, characterized by a polarity change of the nominal voltage between the polarities U n + and U n- with the frequency f. The duration of half a period is designated t 1 .
- the signal voltage no longer has to additionally charge the capacitors.
- the respective nominal voltage U n + or U n- is reached at each polarity change.
- the interval t 1 according to FIG. 2 is extended by a time t 2 .
- the voltage increases in each case to the nominal voltage and is held for a predetermined time t 3 at this level before the next polarity change begins.
- the electronics of the detonator possible to receive the signals properly and identify.
- the invention thus enables a secure and trouble-free signal transmission between the fuze triggering device and the detonators and thus ensures that each detonator is triggered at the intended time.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Geophysics And Detection Of Objects (AREA)
- Air Bags (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
- Figur 1
- ein Ersatzschaltbild einer Bohrlochbestückung mit Sprengzündern und zusätzlichen Verbrauchern,
- Figur 2
- den herkömmlichen Verlauf der Signal- und Zündspannung bei der Ankunft an einem Zünder und
- Figur 3
- den Verlauf der Signal- und Zündspannung entsprechend der Erfindung.
Claims (6)
- Verfahren zum Auslösen von Zündern, insbesondere Sprengzündem, wobei die Zünder über eine Leitung großer Länge mit der Zünderauslöseeinrichtung in Verbindung stehen und über die Leitung zusätzlich Verbraucher mit elektrischer Energie versorgt werden und aufgrund der zusätzlichen Verbraucher und der Leitungslänge bei der Übermittlung mittels Potentialwechsels generierter Signale ein hoher kapazitiver Widerstand auftritt,
wobei vor einer Auslösung der Zünder die vorhandenen Kapazitäten mittels einer Aufschaltung einer Gleichspannung auf die Leitung auf ein solches Niveau aufgeladen werden, dass zumindest bis zum Zeitpunkt der Auslösung des letzten Zünders bei der Übermittlung mittels Potentialwechsel generierter Signale keine durch Ladungsverluste bedingte Aufladung der Kapazitäten erfolgt. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zum Aufladen der Kapazitäten eine höhere Spannung über eine vorgebbare Zeit aufgeschaltet wird als zur Generierung der Signale vorgesehen ist.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die erhöhte Spannung unterhalb einer kritischen Spannung zur Auslösung eines Zünders liegt.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der kapazitive Widerstand ermittelt und in Abhängigkeit seiner Größe die zur Aufladung der Kapazitäten mindestens erforderliche Gleichspannung bestimmt wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die kapazitiv bedingte Tiefpaßfilter-Wirkung der Leitung und der angeschlossenen zusätzlichen Verbraucher auf die von der Zünderauslöseeinrichtung generierten Signale durch eine auf den kapazitiven Widerstand abgestimmte Frequenz der Potentialwechsel ausgeglichen wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Frequenz der Potentialwechsel so gewählt wird, daß die Höhe der erforderlichen Signalspannung erreicht und über eine vorgebbare Zeit innerhalb einer Periode gehalten wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19912641A DE19912641A1 (de) | 1999-03-20 | 1999-03-20 | Verfahren zum Auslösen von Zündern über eine Leitung großer Länge |
DE19912641 | 1999-03-20 | ||
PCT/EP2000/001821 WO2000057124A1 (de) | 1999-03-20 | 2000-03-02 | Verfahren zum auslösen von zündern über eine leitung grosser länge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1166037A1 EP1166037A1 (de) | 2002-01-02 |
EP1166037B1 true EP1166037B1 (de) | 2004-05-19 |
Family
ID=7901798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00920468A Expired - Lifetime EP1166037B1 (de) | 1999-03-20 | 2000-03-02 | Verfahren zum auslösen von zündern über eine leitung grosser länge |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1166037B1 (de) |
AT (1) | ATE267382T1 (de) |
AU (1) | AU4103900A (de) |
DE (2) | DE19912641A1 (de) |
WO (1) | WO2000057124A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10139810B4 (de) * | 2000-11-09 | 2014-10-16 | Orica Explosives Technology Pty. Ltd. | Spannungssensor zur Überwachung elektronischer Zündkreise |
CN102889161A (zh) * | 2012-09-11 | 2013-01-23 | 中国航天科工集团第六研究院二一〇所 | 冲量发动机点火控制装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3417259A (en) * | 1966-10-26 | 1968-12-17 | Conductron Corp | Control systems for sequentially actuating a plurality of loads |
US3564278A (en) * | 1968-12-27 | 1971-02-16 | Energy Conversion Devices Inc | Squib control circuit |
JP2590344B2 (ja) * | 1987-10-20 | 1997-03-12 | 日本油脂株式会社 | 電子式遅延雷管 |
FR2695719B1 (fr) * | 1992-09-17 | 1994-12-02 | Davey Bickford | Procédé de commande de détonateurs du type à module d'allumage électronique à retard intégré, ensemble codé de commande de tir et module d'allumage codé pour sa mise en Óoeuvre. |
-
1999
- 1999-03-20 DE DE19912641A patent/DE19912641A1/de not_active Withdrawn
-
2000
- 2000-03-02 DE DE50006500T patent/DE50006500D1/de not_active Expired - Lifetime
- 2000-03-02 AT AT00920468T patent/ATE267382T1/de not_active IP Right Cessation
- 2000-03-02 AU AU41039/00A patent/AU4103900A/en not_active Abandoned
- 2000-03-02 WO PCT/EP2000/001821 patent/WO2000057124A1/de active IP Right Grant
- 2000-03-02 EP EP00920468A patent/EP1166037B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19912641A1 (de) | 2000-09-21 |
DE50006500D1 (de) | 2004-06-24 |
AU4103900A (en) | 2000-10-09 |
ATE267382T1 (de) | 2004-06-15 |
WO2000057124A1 (de) | 2000-09-28 |
EP1166037A1 (de) | 2002-01-02 |
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