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WO1998038470A1 - Systeme de forage de puits a l'explosif - Google Patents

Systeme de forage de puits a l'explosif Download PDF

Info

Publication number
WO1998038470A1
WO1998038470A1 PCT/EP1998/001081 EP9801081W WO9838470A1 WO 1998038470 A1 WO1998038470 A1 WO 1998038470A1 EP 9801081 W EP9801081 W EP 9801081W WO 9838470 A1 WO9838470 A1 WO 9838470A1
Authority
WO
WIPO (PCT)
Prior art keywords
perforation
ignition
switch
ignition line
signal combination
Prior art date
Application number
PCT/EP1998/001081
Other languages
German (de)
English (en)
Inventor
Rolf Rospek
Heinz Schäfer
Ulrich Steiner
Lothar JÄSCHE
Helmut Lechen
Steffen Witte
Original Assignee
Dynamit Nobel Gmbh Explosivstoff- Und Systemtechnik
Antares Datensysteme Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dynamit Nobel Gmbh Explosivstoff- Und Systemtechnik, Antares Datensysteme Gmbh filed Critical Dynamit Nobel Gmbh Explosivstoff- Und Systemtechnik
Priority to CA002282324A priority Critical patent/CA2282324A1/fr
Priority to AU68239/98A priority patent/AU6823998A/en
Priority to EP98913594A priority patent/EP0963539A1/fr
Publication of WO1998038470A1 publication Critical patent/WO1998038470A1/fr
Priority to NO994166A priority patent/NO994166L/no

Links

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
    • 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
    • E21B43/116—Gun or shaped-charge perforators
    • E21B43/1185—Ignition systems

Definitions

  • the invention relates to a device for perforating walls of boreholes, in particular boreholes, which are used for oil or gas production.
  • Drill holes for oil production usually run through several vertically spaced oil-bearing layers. In order to work economically, all areas of the borehole that lie in the area of these oil-bearing layers are perforated. Since lowering the explosive charges to the desired perforation depths is a lengthy process, it is customary to use a plurality of ignition stages attached to one or more ignition lines, each of which has a detonator with the associated explosive charges.
  • the known systems work with mechanical switches for separating the individual ignition stages. The problem with these systems is that short circuits or undefined conditions can occur, which means that the blasting must be stopped and the ignition stage must be pulled out of the borehole again.
  • the invention has for its object to provide an explosive perforation device with improved activation and electrical isolation of the individual ignition stages.
  • the explosive perforation device has a plurality of perforation stages arranged one behind the other, which are electrically connected in series to an ignition line.
  • Each perforation level contains an addressable switch, which can be selectively activated by a signal combination on the ignition cable. In the idle state, the switch switches the ignition line through to the next perforation level. Only a two-pole ignition cable is used, in which the switches are arranged.
  • An ignition control unit which activates the individual perforation charges of a perforation stage, is separated from the ignition line in the idle state of the switch. In the working position of the switch, the ignition control device is connected to the ignition line, while the ignition line is interrupted to the next lower perforation level.
  • the explosive perforation device has the advantage that in the rest position of the switch, the downstream detonator electronics of the perforation stages are galvanically separated from the ignition line. Only when a perforation stage switch is activated by programming is the electronics of this addressed perforation stage connected to the ignition line, so that the ignition control device of the perforation stage is activated. After activating the ignition control device, it must be programmed with special digital signals in order to be able to address and ignite the perforation charges of this perforation level. If the ignition control device receives signals that do not meet the specification, the ignition control device must be reset by interrupting the voltage supply for 20 seconds. This double addressing makes a misfire very unlikely.
  • the ignition control device can be programmed such that the perforation charges of the perforation level in question only detonate after an adjustable delay time. This makes it possible to program the lowest perforation level and to activate the switch of the next higher perforation level within the delay time, so that the lowest perforation level is disconnected from the ignition line in order to prevent the next higher perforation level or the igniter from being detonated The perforation charges on the ignition cable are damaged.
  • each switch contains an individual address. When this address is received, this switch changes to the working position.
  • the address of the switch advantageously consists of eight digits. This address is transmitted serially on the ignition cable and stored in a shift register of the switch. This addressing of the switch increases the safety of the blast perforation direction, since each switch can be addressed selectively and any interference pulses on the ignition line do not lead to activation of the switch.
  • the object is achieved with the features of claim 5.
  • the perforation stages are electrically connected in series to the ignition line, and each perforation stage has an electronic switch with three switch positions, the switches being open in the idle state and brought into the position corresponding to the respective signal combination by one of two possible signal combinations on the ignition line become.
  • this alternative embodiment is identical to the embodiment according to claim 1.
  • the ignition control device can advantageously only be activated by a specific signal combination on the ignition line.
  • the signal combination has eight or more digits on the ignition line, this signal combination being compared with a signal combination stored in a shift register of the electronic switch.
  • the signal combination on the ignition line preferably consists of a specific number of pulses within a defined time window, the signal combination being compared with that stored in the switch electronics.
  • Fig. 2 shows the basic structure of an explosive perforation device
  • Fig. 3 shows the chronological sequence of a hole perforation.
  • a blast perforation device 10 hangs on an ignition line in the borehole 1.
  • the blast perforation device 10 has an upper perforation step 12 and a lower perforation step 13.
  • the lower perforation step 13 has already detonated and has perforated the borehole wall 2, so that the oil from the oil-bearing layer 4 can enter the borehole 1 and can be conveyed from there.
  • FIG. 2 shows the blasting perforation device 10 with the two perforation stages 12 and 13.
  • Each perforation stage has an electronic switch 14 arranged in the ignition line 11, which in its rest position connects the ignition line 11 to the next lower perforation stage. In the working position, the switch 14 disconnects the ignition line 11 and connects the upper end of the ignition line 11 to an ignition control device 15.
  • Radially connected to these are perforation charges 16 which are distributed circumferentially and one above the other.
  • the perforation charges are hollow charges 16 which act radially outwards and, when ignited, blow up round holes in the steel jacket of the tube 2, through which the oil can then penetrate into the tube 2.
  • the ignition control device 15 can be programmed so that a delay time is set. If the ignition control device 15 then receives an ignition signal, the shaped charges 16 only detonate after this delay time has elapsed.
  • the switch 14 has control electronics 17 and a switching element 18 which is actuated as a function of the control electronics 17. Once the switching element 18 has been actuated, it remains in the working position, even if the voltage supply is removed from the ignition line 11, e.g. B. if an ignition control device 15 must be reset after receiving a faulty signal.
  • Ignition line 11 only with an above-ground igniter, not shown here. is bound, but not with one of the ignition control devices 15.
  • the switch 14 of the lowest perforation level 13 becomes a specific address signal ASi addressed (time interval T).
  • the address signal AS is serially transmitted on the ignition line 11, which consists of two wires, as an 8-bit signal from the ignition device to the switches 14.
  • the electronics 17 of the switch 14 detects a bit change in the unipolar address signal AS when the signal voltage exceeds or falls below a value which corresponds to half the normal signal amplitude.
  • the individual bits are read into a shift register one after the other, the content of which is advanced with each bit change. After 8 bits have been read in, the content of the shift register is read out and compared with a permanently stored address assigned to the respective switch 14. If the two addresses are identical, the switching element 18 of the switch 14 is activated in a time interval T 2 , so that the ignition control device 15 of the lowest perforation level 13 is connected to the ignition line 11 and thus to the ignition device.
  • the ignition control device 15 is now programmed with a bipolar programming signal PS.
  • the programming signal PS consists of a first part, with which the ignition control device 15 is unlocked, and a second part, with which the delay time T v is programmed.
  • the programmed, freely selectable delay time T v is activated.
  • the switch 14 of the next higher perforation stage 12 is addressed (T), so that in an interval T 5 the ignition line 11 is opened by flipping this switch and is connected to the ignition control device of the perforation stage 12.
  • the bottom perforation stage 13 is thus completely separated from the ignition line 11.
  • the delay time T v is dimensioned such that within the delay time T v the switch 14 of the next higher perforation stage 12 can be activated with an address signal AS 2 , which differs from the address signal ASi, and a certain safety time (e.g. half of the Time interval T 6 ) is available.
  • the ignition control device 15 ignites all shaped charges 16 of the lowest perforation level 13.
  • the perforation level 12 which is now the lowest perforation level, becomes up to the height proceed to the next oil-bearing layer 4.
  • the sequence now repeats from time t 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

L'invention concerne un système de forage (10) de puits (1) à l'explosif (10). Selon ce système, les forages sont effectués en différents niveaux successifs (12, 13), pour chacun desquels sont prévues plusieurs charges (16). A chaque niveau correspond un commutateur adressable (14) qui, en position de repos, branche le circuit d'allumage (11) et, en position de travail, sépare ledit circuit d'allumage pour le raccorder à un dispositif de commande d'allumage (15) pour le niveau de forage correspondant.
PCT/EP1998/001081 1997-02-28 1998-02-26 Systeme de forage de puits a l'explosif WO1998038470A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002282324A CA2282324A1 (fr) 1997-02-28 1998-02-26 Systeme de forage de puits a l'explosif
AU68239/98A AU6823998A (en) 1997-02-28 1998-02-26 Well boring with blasting agents
EP98913594A EP0963539A1 (fr) 1997-02-28 1998-02-26 Systeme de forage de puits a l'explosif
NO994166A NO994166L (no) 1997-02-28 1999-08-27 Ekspolosiv perforeringsanordning for brönner

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19708073.1 1997-02-28
DE19708073 1997-02-28
DE19807386A DE19807386A1 (de) 1997-02-28 1998-02-21 Sprengperforationsvorrichtung für Bohrlöcher
DE19807386.0 1998-02-21

Publications (1)

Publication Number Publication Date
WO1998038470A1 true WO1998038470A1 (fr) 1998-09-03

Family

ID=26034372

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/001081 WO1998038470A1 (fr) 1997-02-28 1998-02-26 Systeme de forage de puits a l'explosif

Country Status (6)

Country Link
EP (1) EP0963539A1 (fr)
AU (1) AU6823998A (fr)
CA (1) CA2282324A1 (fr)
DE (1) DE19807386A1 (fr)
NO (1) NO994166L (fr)
WO (1) WO1998038470A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6148263A (en) * 1998-10-27 2000-11-14 Schlumberger Technology Corporation Activation of well tools
US6283227B1 (en) 1998-10-27 2001-09-04 Schlumberger Technology Corporation Downhole activation system that assigns and retrieves identifiers
US6385031B1 (en) 1998-09-24 2002-05-07 Schlumberger Technology Corporation Switches for use in tools
US6752083B1 (en) 1998-09-24 2004-06-22 Schlumberger Technology Corporation Detonators for use with explosive devices
US6938689B2 (en) 1998-10-27 2005-09-06 Schumberger Technology Corp. Communicating with a tool
US7347278B2 (en) 1998-10-27 2008-03-25 Schlumberger Technology Corporation Secure activation of a downhole device
US9464508B2 (en) 1998-10-27 2016-10-11 Schlumberger Technology Corporation Interactive and/or secure activation of a tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2341212A1 (fr) * 2009-12-29 2011-07-06 Welltec A/S Outil de perforation de trous de forage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655619A (en) * 1948-10-25 1953-10-13 Cherrietta Dover Selective charge-firing equipment
US4208966A (en) * 1978-02-21 1980-06-24 Schlumberger Technology Corporation Methods and apparatus for selectively operating multi-charge well bore guns
FR2530333A1 (fr) * 1982-07-16 1984-01-20 Commissariat Energie Atomique Installation de transport et de mise a feu selective a distance de plusieurs charges explosives portees par un cable porteur
US4496010A (en) * 1982-07-02 1985-01-29 Schlumberger Technology Corporation Single-wire selective performation system
US4527636A (en) * 1982-07-02 1985-07-09 Schlumberger Technology Corporation Single-wire selective perforation system having firing safeguards
EP0386860A2 (fr) * 1986-09-25 1990-09-12 Nippon Oil And Fats Company, Limited Circuit à retard pour faire sauter électriquement, détonateur comprenant un circuit à retard et système pour faire sauter des détonateurs par voie électrique
US5295438A (en) * 1991-12-03 1994-03-22 Plessey Tellumat South Africa Limited Single initiate command system and method for a multi-shot blast

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655619A (en) * 1948-10-25 1953-10-13 Cherrietta Dover Selective charge-firing equipment
US4208966A (en) * 1978-02-21 1980-06-24 Schlumberger Technology Corporation Methods and apparatus for selectively operating multi-charge well bore guns
US4496010A (en) * 1982-07-02 1985-01-29 Schlumberger Technology Corporation Single-wire selective performation system
US4527636A (en) * 1982-07-02 1985-07-09 Schlumberger Technology Corporation Single-wire selective perforation system having firing safeguards
FR2530333A1 (fr) * 1982-07-16 1984-01-20 Commissariat Energie Atomique Installation de transport et de mise a feu selective a distance de plusieurs charges explosives portees par un cable porteur
EP0386860A2 (fr) * 1986-09-25 1990-09-12 Nippon Oil And Fats Company, Limited Circuit à retard pour faire sauter électriquement, détonateur comprenant un circuit à retard et système pour faire sauter des détonateurs par voie électrique
US5295438A (en) * 1991-12-03 1994-03-22 Plessey Tellumat South Africa Limited Single initiate command system and method for a multi-shot blast

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6385031B1 (en) 1998-09-24 2002-05-07 Schlumberger Technology Corporation Switches for use in tools
US6386108B1 (en) 1998-09-24 2002-05-14 Schlumberger Technology Corp Initiation of explosive devices
US6752083B1 (en) 1998-09-24 2004-06-22 Schlumberger Technology Corporation Detonators for use with explosive devices
US6148263A (en) * 1998-10-27 2000-11-14 Schlumberger Technology Corporation Activation of well tools
US6283227B1 (en) 1998-10-27 2001-09-04 Schlumberger Technology Corporation Downhole activation system that assigns and retrieves identifiers
US6604584B2 (en) 1998-10-27 2003-08-12 Schlumberger Technology Corporation Downhole activation system
US6938689B2 (en) 1998-10-27 2005-09-06 Schumberger Technology Corp. Communicating with a tool
US7347278B2 (en) 1998-10-27 2008-03-25 Schlumberger Technology Corporation Secure activation of a downhole device
US9464508B2 (en) 1998-10-27 2016-10-11 Schlumberger Technology Corporation Interactive and/or secure activation of a tool

Also Published As

Publication number Publication date
CA2282324A1 (fr) 1998-09-03
NO994166L (no) 1999-10-13
DE19807386A1 (de) 1998-09-03
AU6823998A (en) 1998-09-18
EP0963539A1 (fr) 1999-12-15
NO994166D0 (no) 1999-08-27

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