EP0601880A2 - Detonator für Bohrlochperforator mit explodierender Folie - Google Patents

Detonator für Bohrlochperforator mit explodierender Folie Download PDF

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Publication number
EP0601880A2
EP0601880A2 EP93309990A EP93309990A EP0601880A2 EP 0601880 A2 EP0601880 A2 EP 0601880A2 EP 93309990 A EP93309990 A EP 93309990A EP 93309990 A EP93309990 A EP 93309990A EP 0601880 A2 EP0601880 A2 EP 0601880A2
Authority
EP
European Patent Office
Prior art keywords
firing
elongate
detonating cord
chamber
firing unit
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.)
Withdrawn
Application number
EP93309990A
Other languages
English (en)
French (fr)
Other versions
EP0601880A3 (de
Inventor
James M. Barker
Larry Lee Grigar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Halliburton Co
Original Assignee
Halliburton Co
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 Halliburton Co filed Critical Halliburton Co
Publication of EP0601880A2 publication Critical patent/EP0601880A2/de
Publication of EP0601880A3 publication Critical patent/EP0601880A3/de
Withdrawn legal-status Critical Current

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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
    • 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 present disclosure is directed to an exploding foil detonator for use in a perforating gun assembly which is typically installed in a cased well borehole for forming perforations through the casing, through the cement on the exterior of the casings and into the adjacent formations.
  • the perforations are formed by shaped charges which are cone shaped explosive components in appropriate shells. While a perforating gun can support only one at a minimum, it typically is assembled supporting a large number of shaped charges so that a large number of perforations can be formed in a defined region. It is necessary to assemble the perforating gun and the numerous shaped charges at the surface and the entire perforating gun assembly is then lowered into the well borehole.
  • Premature detonation must be prevented.
  • One way to accomplish this is to utilize explosives which are not very sensitive.
  • the relative sensitivity of explosives is defined by designating the explosives as primary or secondary explosives.
  • the secondary explosives used in detonators are relatively insensitive. That makes premature or unintended detonation difficult. This virtue enhances the safety of the perforating gun assembly. However, and in opposite fashion, it also makes it very difficult to detonate when intended.
  • a safety device which has found acceptance is an exploding foil detonator, sometimes called a slapper detonator.
  • the slapper type detonator is difficult to initiate. This again is a safety feature because, in order to function, the rate of energy delivery is perhaps a million more times than a conventional hot wire detonator. This helps assure safety because it reduces sensitivity to stimuli which might otherwise cause unintended detonation such as exposure to RF fields, perhaps detonation as a result of static electricity in the region, friction, heat, or impact during usage.
  • the current must be delivered in a very short time. Typical values of the current pulse are 2000-3000 amperes delivered in less than 1/2 microsecond. It is this unique combination of high current and short delivery time that make exploding foil initiators so safe.
  • This type of firing pulse is simply a firing stimuli which is not found in nature. Because of the unique characteristics of this signal (rise time and current peak), it is necessary to employ a capacitive discharge firing unit to create it.
  • the capacitive discharge unit allows electrical energy to be stored, up to a predetermined value, and dumped at once to the detonator foil. The discharged energy causes a very high current to flow through the foil, heating it to the plasma state.
  • the violently expanding plasma causes a disk of plastic (which was in contact with the foil) to be propelled across a gap until it impacts the secondary explosive charge. It is the impact of this disk which causes prompt (and safe) initiation of the secondary explosive pellet within the detonator.
  • One important feature of the present apparatus is the availability of cylindrical components which are fitted together, thereby defining a cylindrical construction for the entire set of apparatus. Also. a hermetic feedthrough is not consumed in every shot. Cylindrical geometry enables the components to be more readily manufactured and assembled. This also enables easy assembly into a set of equipment which has reduced inductance. This reduces the voltage required for firing purposes. More specifically, this enables provision of a detonator assembly which responds with the intended explosion when a current is applied to it so that the circuit inductance does not prevent proper and reliable firing of the detonator.
  • the present apparatus is able to cooperate with a cylindrical, coaxial feedthrough in conjunction with a coaxial cable.
  • the equipment is therefore quite easy to assemble and provides a reliable structure.
  • it is constructed in such a way as to reduce the inductive and resistive losses through the connection. The risk of arcing is reduced, and the feedthrough is not destroyed with each shot.
  • a perforating gun assembly for use in detonating one or more shaped charges supported by the perforating gun assembly, which assembly comprises:
  • an apparatus for use in an exploding foil detonator assembly for a perforating gun supporting one or more shape charges comprising:
  • Fig. 4 shows a typical embodiment of the perforating gun tool string.
  • the tool string 1 is comprised (from the top) of a cable head 2 which permits the assembly to be suspended from a wireline logging cable 3.
  • the lower end of the cable head is connected to a device for depth correlation 4; this device 4 can either be a casing collar locator or logging tool that measures gamma-ray activity from the downhole formations.
  • Attached below the correlation device 4 is a decentralizer 5 which is used to obtain proper azimuthal orientation of the tool string inside the casing.
  • a capacitive discharge firing unit 6 is below the decentralizer 5. This is the device that internally stores electrical energy until it is ready to be discharged in order to fire the exploding foil initiator.
  • a firing head 7 Positioned below the capacitive discharge firing unit 6 is a firing head 7. This houses the firing cable and detonator as depicted in Fig. 1B. Attached to the firing head are the perforating components, detonating cord 52 and shaped charges 50, exposed to the wellbore environment.
  • This type perforating gun is typically called a "capsule”, or “semi-expendable” gun.
  • Fig. 1A shows the upper end of the firing assembly.
  • the description will begin with the upper end and proceed to the lower end which is shown in Fig. 1B, the two views being connected serially. After that, details will be given regarding the assembly shown in Fig. 2.
  • the firing assembly 10 includes the aforementioned decentralizer 5 at the upper end which connects with a sub 12.
  • the decentralizer 5 joins to the sub 12 and is held in place by means of cap screws 13.
  • the interior volume is sealed by suitable seal rings 14.
  • a sealed chamber 16 is defined on the interior and encloses a connector formed with a plug and socket indicated generally at 17. This is assembled in the chamber 16. It connects serially with a short rod 18 which extends through the sub 12.
  • the sub 12 is equipped with a surrounding outer shoulder which receives a surrounding housing 20 which is positioned on the exterior.
  • the housing is fastened to the sub 12 by means of cap screws 21, there being two or more screws incorporated for this purpose. This interconnection is made fluid tight by the provision of circular seals 22.
  • the seals define an internally located seal mechanism defining a fluid tight chamber on the interior.
  • a cylindrically shaped capacitive discharge firing assembly 25 By means of a sleeve 23 and cooperative spring 24, registration is accomplished for a cylindrically shaped capacitive discharge firing assembly 25.
  • the assembly 25 has safety and arming circuits 90, a power supply 91, capacitors 92, bleeder resistors 93, and a spark gap 94.
  • Fig. 5 is a block diagram that shows this circuit arrangement.
  • the firing assembly 25 is connected with the input by means of a conductor 26 which is joined to a fitting 27.
  • the conductor 26 connects with the conductor 18 previously mentioned wherein the two join at a mating plug and socket 28. This enables the telescoped construction to be joined. This enables electric current to be provided to the firing assembly 25 which is enclosed in the housing 20.
  • the housing 20 extends the full length of the cylindrical assembly 25.
  • the housing terminates at a central plug 29 which has a reduced external diameter and which is formed integral with the housing 20.
  • the plug 29 is incorporated to provide a transition for the next portion of the equipment, The plug 29 therefore has a reduced diameter. It is axially drilled to support a coaxial hermetic feedthrough 28.
  • the feedthrough 28 connects to the assembly 25.
  • the plug has several grooves in the exterior to receive seal rings. This enables a leak proof connection to be made.
  • the firing head 7 is formed of an elongate cylindrical chamber 30. It is constructed with one end fitting around the plug 26 and is fastened by means of two or more cap screws 31. This defines a smooth exterior. Moreover, the chamber 30 is constructed with a hollow region 32 on the interior. That chamber region is sealed. It is sealed at the left hand end by the plug 29.
  • the firing assembly 25 connects with the coaxial feedthrough 28 previously mentioned. There is an elastomeric sealing boot 37 which fits around the exterior of the feedthrough 28. In addition to that, the plug 29 is provided with an enlarged hole 34 drilled into it. This permits the sealing rings 99 on the feedthrough 28 to prevent fluid intrusion into the firing assembly 25 after detonation.
  • the hollow region 32 is dry before firing; it is flooded afterward.
  • the end of the feedthrough terminates with a protruding metal coaxial conductor 35 which is electrically connected by a metal coaxial cap 36 fitted over it.
  • the cap 36 is on the interior of the protective resilient rubber boot 37.
  • the boot 37 surrounds the tip of the feedthrough and assures structural security so that the connection which is accomplished from the metal coaxial conductor 35 to the coaxial cap 36 is secure from impact or damage from wellbore fluids surrounding it after firing.
  • the coaxial cap 36 connects with a coaxial cable 40.
  • the cable 40 is provided with extra length in the form of several loops in the chamber 32.
  • the coaxial cable extends to the far end of the chamber and passes through an opening in a detonator which is positioned at the remote end of the chamber 32. Greater details will be observed on review of Fig. 2 of the drawings which is an enlarged view of this detonator.
  • Fig. 1A the support mechanism which holds a string of shaped charges. While the apparatus will certainly function with only one shaped charge, normally several are included. Assuming that a large number of shaped charges are supported by the equipment shown in Fig. 1, that equipment has to be sufficiently rugged to support the weight of the shaped charges attached to the lower end of the equipment. This is taken into account in the thickness of the components shown in Fig. 1. To this end, the housing 20 has a specified wall thickness so that it can support the weight of the equipment suspended below. Moreover, the screws 13, 21 and 31 are sized and provided in sufficient quantity so that the equipment can readily support the weight which is suspended below.
  • the chamber 30 in particular being cylindrical and to note that it terminates at a truncated face 44.
  • These bolts serve as fasteners for securing a strip 48.
  • the strip 48 serves as an anchor or support for one or more shaped charges 50.
  • the shaped charges are aligned by the strip 48 to a common azimuth.
  • One strip 48 is shown in this view.
  • the shape charges are all connected to a common detonating cord 52.
  • the detonating cord 52 connects at multiple explosive cord connectors 53 for the several shaped charges 50. This permits the explosive connection to be made through the detonating cord to all the shaped charges. As will be understood, they are detonated from the top end. It is desirable that the detonating cord be initiated by the equipment shown in this disclosure which then extends the detonation to the several shaped charges hanging below the equipment.
  • the detonating cord 52 terminates at the detonator mechanism which is shown in Fig. 2 of the drawings.
  • the detonating cord 52 is therefore initiated in operation by the detonator assembly shown in Fig. 2 generally identified by the reference numeral 55, As a generalization, it is a separate assembly which is more aptly described in some detail in U.S. patent 4,759,291.
  • this detonator assembly shown at Fig. 2 incorporates a plug 56 which is provided with a set of threads for attachment in a mating hole at the end of the chamber 30 mentioned above. It incorporates a surrounding external sleeve 58 which is provided with one or more grooves for sealing O-rings 57. This prevents leakage along the exterior of the body. The sleeve 58 threads to the plug 56.
  • the coaxial cable is formed with an outer mesh which is in the form of a woven wire mesh cylinder surrounding an internal insulator.
  • a pig tail is formed by trimming back and grouping the wires that make up the electrically conductive screen. In particular, this permits appropriate connection by soldering the described pig tail into the shaped pin 61.
  • the coaxial cable includes an inner woven conductor which enables a pin 62 to be supported and connected thereby defining two spaced pins..
  • the device incorporates an electrical circuit which is completed through the structure shown in Fig. 3.
  • This is formed of a sandwich type material.
  • This composite or layered material utilizes an insulating material 63 shown in Fig. 3.
  • the preferred construction utilizes a thin piece of dielectric material, one brand being known under the trademark Kapton.
  • a thin film of copper is laminated on it, and this laminated blank material is sold under the trademark Microclad. It finds common application in making printed circuit boards.
  • the copper layer is shaped into the narrow neck 64 and the insulative material remains over it.
  • the copper layer has the shape of an hour glass. It is mounted so that the insulative material (Kapton in the preferred version) faces an explosive initiating pellet 66. The pellet 66 in turn immediately abuts another explosive pellet 67. These two pellets are adjacent to the Kapton material and are separated by a narrow space.
  • a thimble 68 having a central hole 70 is placed over the sacrificial foil construction described with regard to Fig. 3. Briefly, the thimble 68 has a surrounding skirt which enables it to be placed over that sacrificial foil.
  • the central hole 70 serves as an alignment passage. It is able to direct a flying disk against the first explosive pellet 66. It should be noted that the skin on the thimble is not necessary provided other means are employed to maintain alignment of the central hole over the narrow neck.
  • the thimble 68 is provided with a central hole 70 thereby forming a circular disk from the insulator which is fired by gas pressure through the circular hole 70. While Fig. 2 shows the hole to be quite short, it is nevertheless able to cut a flying disk from the insulator so that the flying disk is shot, so to speak, against the explosive pellet 66.
  • the pellet 66 and 67 are selected for safety. They are secondary explosives which are difficult to initiate or detonate, but which are sufficiently sensitive to be responsive to the flying disk which is fired against the pellet 66. The explosion is initiated in the pellet 66 and in turn that is coupled to the explosive pellet 67. The pellet 67 is covered over with a thin metal plate 71.
  • the plate 71 is severed to form a metal flyer which strikes against an explosive" pellet 72. On impact, that flyer impingement causes the pellet 72 to detonate and couples the explosive force to the detonating cord 52. This detonates the detonating cord at the end. Once started, the explosive reaction is carried by the detonating cord to the many shaped charges.
  • the sleeve 58 encloses the assembled pellets 66 and 67 and provides spacing so that the metal flyer plate 71 has a specified distance of travel. Moreover, this spaced arrangement is assured so that the detonating cord does not pull free.
  • the explosive pellet 72 is held against the end of the detonating cord by a pellet cap 74 which in turn is held in position by a sleeve 76 fastening over the end of the detonating cord.
  • the sleeve 76 operates in conjunction with the end of the pellet cap 74 which rolls over to pinch and thereby staple the end of the detonating cord 52 at a fixed location. This keeps the detonating cord from pulling free.
  • the sleeve 58 threads at the far right hand end. It has sufficient length that it extends over the end of the detonating cord 52. It has sufficient length that it provides alignment, support and certain fastening for the end of the detonating cord. Moreover, the end of the sleeve 58 is sealed by a large resilient boot 80 which is positioned over the top end of the detonating cord to prevent leakage along the detonating cord into the boot. Finally, the entire assembly 55 shown in Fig. 2 of the drawings is anchored to the coaxial cable 40 previously mentioned and is threaded in place. At the time of assembly, the chamber 30 is made open and exposed for easy assembly. At the time of fabrication of the equipment, the detonating cord 52 is connected through the boot 80 shown in Fig. 2 of the drawings and is brought to the proper termination.
  • the coaxial cable 40 is required to be a large current conductor and more particularly a conductor in which the inductance must be kept low.
  • the exploding foil operates under the ideal that the current is substantially a step function. When switched on, it is fully on so that the rise time of the current is substantially instantaneous. Distributed inductance along the route is detrimental. This type construction reduces the inductance. Should the inductance be excessive, it will retard the rise time. If that occurs, the velocity of the disk which is fired at the explosive pellets to begin detonation is reduced.
  • rise time is reduced if stray inductance is present.
  • the present mechanism provides a means of reducing danger in handling the detonator 55 along with the increased rise time requirements for the current flow. Considering the fact that the detonator may be used at depths of 10,000 feet or greater in a well borehole, it becomes critical that the detonator provide as much safety as possible and that is accomplished by the presently disclosed apparatus.
  • the apparatus of this disclosure provides additional enhancement.
  • the expensive part of the equipment is the firing assembly 25 and the coaxial feedthrough 28 which connects with it. These are structural components which can be used time and again. They are sufficiently spaced from the detonator 55 that they can be retrieved and reused.
  • the detonator 55 is constructed so that its use directs the explosive damages that result from proper operation downwardly. This accompanies the detonation of the detonating cord 52. This forms the necessary shock wave for the detonating cord initiation.
  • the equipment that is normally destroyed includes the detonating cord 52, and all the shaped charges 50 which are supported on the mounting strip. Generally, it is desirable that the remaining equipment be retrieved to the surface rather than left in the hole.
  • the equipment retrieved typically after proper operation, includes the cylinder 30 which is reused by positioning a new detonator 55 in it. While the detonator 55 is consumed, it can be replaced more readily because it is only a small portion of the structure. However, most of the detonator assembly 55 shown in Fig. 2 of the drawings is substantially destroyed. At the time of subsequent reuse, all the components shown in that view must be collected and assembled as new.

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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)
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EP93309990A 1992-12-10 1993-12-10 Detonator für Bohrlochperforator mit explodierender Folie. Withdrawn EP0601880A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US98852892A 1992-12-10 1992-12-10
US988528 1992-12-10

Publications (2)

Publication Number Publication Date
EP0601880A2 true EP0601880A2 (de) 1994-06-15
EP0601880A3 EP0601880A3 (de) 1995-02-22

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EP93309990A Withdrawn EP0601880A3 (de) 1992-12-10 1993-12-10 Detonator für Bohrlochperforator mit explodierender Folie.

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EP (1) EP0601880A3 (de)
CA (1) CA2111153A1 (de)
NO (2) NO934507L (de)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675262A1 (de) * 1994-03-29 1995-10-04 Services Petroliers Schlumberger Ein Geschosslocher mit einer Mehrzahl von Ladungen
GB2297145A (en) * 1995-01-23 1996-07-24 Western Atlas Int Inc EBW perforating gun system
US6095258A (en) * 1998-08-28 2000-08-01 Western Atlas International, Inc. Pressure actuated safety switch for oil well perforating
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
EP2092161A1 (de) * 2006-11-27 2009-08-26 Halliburton Energy Services, Inc. Vorrichtung und verfahren für seitenwandschlagkernbohren unter verwendung einer spannungsaktivierten zündvorrichtung
US7762331B2 (en) 2006-12-21 2010-07-27 Schlumberger Technology Corporation Process for assembling a loading tube
US8281718B2 (en) 2009-12-31 2012-10-09 The United States Of America As Represented By The Secretary Of The Navy Explosive foil initiator and method of making
WO2013125975A1 (ru) * 2012-02-22 2013-08-29 Bogdan Aleksandr Stepanovich Капсюль - детонатор
WO2014179669A1 (en) * 2013-05-03 2014-11-06 Schlumberger Canada Limited Cohesively enhanced modular perforating gun
US9464508B2 (en) 1998-10-27 2016-10-11 Schlumberger Technology Corporation Interactive and/or secure activation of a tool
US10077641B2 (en) 2012-12-04 2018-09-18 Schlumberger Technology Corporation Perforating gun with integrated initiator
US10858919B2 (en) 2018-08-10 2020-12-08 Gr Energy Services Management, Lp Quick-locking detonation assembly of a downhole perforating tool and method of using same
US11078763B2 (en) 2018-08-10 2021-08-03 Gr Energy Services Management, Lp Downhole perforating tool with integrated detonation assembly and method of using same
US11377935B2 (en) 2018-03-26 2022-07-05 Schlumberger Technology Corporation Universal initiator and packaging
US11566500B2 (en) 2019-02-08 2023-01-31 Schlumberger Technology Corporation Integrated loading tube
US11834934B2 (en) 2019-05-16 2023-12-05 Schlumberger Technology Corporation Modular perforation tool
USD1016958S1 (en) 2020-09-11 2024-03-05 Schlumberger Technology Corporation Shaped charge frame
US11994008B2 (en) 2018-08-10 2024-05-28 Gr Energy Services Management, Lp Loaded perforating gun with plunging charge assembly and method of using same
US12098623B2 (en) 2020-11-13 2024-09-24 Schlumberger Technology Corporation Oriented-perforation tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10267127B2 (en) * 2015-08-25 2019-04-23 Owen Oil Tools Lp EFP detonating cord

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762067A (en) * 1987-11-13 1988-08-09 Halliburton Company Downhole perforating method and apparatus using secondary explosive detonators
US4944225A (en) * 1988-03-31 1990-07-31 Halliburton Logging Services Inc. Method and apparatus for firing exploding foil initiators over long firing lines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762067A (en) * 1987-11-13 1988-08-09 Halliburton Company Downhole perforating method and apparatus using secondary explosive detonators
US4944225A (en) * 1988-03-31 1990-07-31 Halliburton Logging Services Inc. Method and apparatus for firing exploding foil initiators over long firing lines

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505134A (en) * 1993-09-01 1996-04-09 Schlumberger Technical Corporation Perforating gun having a plurality of charges including a corresponding plurality of exploding foil or exploding bridgewire initiator apparatus responsive to a pulse of current for simultaneously detonating the plurality of charges
EP0675262A1 (de) * 1994-03-29 1995-10-04 Services Petroliers Schlumberger Ein Geschosslocher mit einer Mehrzahl von Ladungen
GB2297145A (en) * 1995-01-23 1996-07-24 Western Atlas Int Inc EBW perforating gun system
GB2297145B (en) * 1995-01-23 1998-10-21 Western Atlas Int Inc EBW perforating gun system
US6095258A (en) * 1998-08-28 2000-08-01 Western Atlas International, Inc. Pressure actuated safety switch for oil well perforating
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
US6385031B1 (en) 1998-09-24 2002-05-07 Schlumberger Technology Corporation Switches for use in 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
US6148263A (en) * 1998-10-27 2000-11-14 Schlumberger Technology Corporation Activation of well tools
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
US8230946B2 (en) 2006-11-27 2012-07-31 Halliburton Energy Services, Inc. Apparatus and methods for sidewall percussion coring using a voltage activated igniter
EP2092161A1 (de) * 2006-11-27 2009-08-26 Halliburton Energy Services, Inc. Vorrichtung und verfahren für seitenwandschlagkernbohren unter verwendung einer spannungsaktivierten zündvorrichtung
EP2092161A4 (de) * 2006-11-27 2012-01-18 Halliburton Energy Serv Inc Vorrichtung und verfahren für seitenwandschlagkernbohren unter verwendung einer spannungsaktivierten zündvorrichtung
US7762331B2 (en) 2006-12-21 2010-07-27 Schlumberger Technology Corporation Process for assembling a loading tube
US8281718B2 (en) 2009-12-31 2012-10-09 The United States Of America As Represented By The Secretary Of The Navy Explosive foil initiator and method of making
WO2013125975A1 (ru) * 2012-02-22 2013-08-29 Bogdan Aleksandr Stepanovich Капсюль - детонатор
US10077641B2 (en) 2012-12-04 2018-09-18 Schlumberger Technology Corporation Perforating gun with integrated initiator
WO2014179669A1 (en) * 2013-05-03 2014-11-06 Schlumberger Canada Limited Cohesively enhanced modular perforating gun
US11421514B2 (en) 2013-05-03 2022-08-23 Schlumberger Technology Corporation Cohesively enhanced modular perforating gun
US11377935B2 (en) 2018-03-26 2022-07-05 Schlumberger Technology Corporation Universal initiator and packaging
US11078763B2 (en) 2018-08-10 2021-08-03 Gr Energy Services Management, Lp Downhole perforating tool with integrated detonation assembly and method of using same
US10858919B2 (en) 2018-08-10 2020-12-08 Gr Energy Services Management, Lp Quick-locking detonation assembly of a downhole perforating tool and method of using same
US11898425B2 (en) 2018-08-10 2024-02-13 Gr Energy Services Management, Lp Downhole perforating tool with integrated detonation assembly and method of using same
US11994008B2 (en) 2018-08-10 2024-05-28 Gr Energy Services Management, Lp Loaded perforating gun with plunging charge assembly and method of using same
US11566500B2 (en) 2019-02-08 2023-01-31 Schlumberger Technology Corporation Integrated loading tube
US11834934B2 (en) 2019-05-16 2023-12-05 Schlumberger Technology Corporation Modular perforation tool
USD1016958S1 (en) 2020-09-11 2024-03-05 Schlumberger Technology Corporation Shaped charge frame
US12098623B2 (en) 2020-11-13 2024-09-24 Schlumberger Technology Corporation Oriented-perforation tool

Also Published As

Publication number Publication date
NO934507L (no) 1994-06-13
EP0601880A3 (de) 1995-02-22
NO934507D0 (no) 1993-12-09
CA2111153A1 (en) 1994-06-11

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