US2228873A - Electric blasting initiator - Google Patents

Electric blasting initiator Download PDF

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Publication number
US2228873A
US2228873A US292590A US29259039A US2228873A US 2228873 A US2228873 A US 2228873A US 292590 A US292590 A US 292590A US 29259039 A US29259039 A US 29259039A US 2228873 A US2228873 A US 2228873A
Authority
US
United States
Prior art keywords
plug
initiator
insulation
shell
electric blasting
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
US292590A
Other languages
English (en)
Inventor
English Myrle Hardt
Nydegger Roland Roswell
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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
Priority to BE461595D priority Critical patent/BE461595A/xx
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US292590A priority patent/US2228873A/en
Application granted granted Critical
Publication of US2228873A publication Critical patent/US2228873A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
    • F42B3/107—Sealing-plugs characterised by the material used

Definitions

  • the present invention relates to the art of electric blasting initiators.
  • the electric blasting initiators known to the art have been characterized by several outstanding defects. They have not been completely im-' 1 pervious to water and/or moisture, especially under storage conditions and other rigorous conditions imposed in the field. Consequently these initiator structures of the prior art have not been' sufliciently durable to withstand the physical 35 wear encoui ltered in the field, including forces tending to pull the leg wires out of the cap, such. as severe tamping and the like. Furthermore their lack of resistance to abrasion, especially at the locus of the entrance of theleg wires into 0 the mouth or the shell, has been recognized as productive of many difllculties including short circuits, accidental firing, misflres, and the like.
  • the object of the present invention is the pro-f .duction of a new and improved electric blasting initiator.
  • a further object is an electric blasting initiator-so constructed that the leg wires are firmly gripped toresist forces which would otherwise tend to pull them out of the initiator.
  • An additional object is an electric blasting initiator 0 of enhanced water resistance.
  • Another object is such an initiator with improved abrasion resistonce at the locus of the emergence of the leg wires from the mouth of the shell.
  • Figure 1 is a view in cross-section of the improved electrlc'blasting initiator of our'in- 65 vention.
  • Figure 2. is an enlarged view of the rubber-like plug formed about the leg wires bearing plastic insulation.
  • Figure 3 is a'similar view wherein the plug takes a different form.
  • Fig. 4
  • FIG. 3 is a bottom end view of the modification shown 5 in Fig. 3.
  • the numeral I designates a metal shell into which the plug 2, formed about the leg wires 3, is crimped in water impervious relationship at 4.
  • These leg wires 3 are provided with durable plastic insulation 5, preferably comprising an ethyl cellulose composition.
  • This insulation preferably terminates within the body of the plug, as shown at locus 6.
  • the rubber-like plug material is molded and/or vulcanized about both the exposed and insulated portions of the wires to form a. water impervious juncture at the interface between plug and insulation. This operation may be carried out by any molding process. We prefer to employ the pressure molding process described and claimed in our copending application, Serial Number 181,647, filed December 24. 1937, from which much of the subject matter of the present application was derived, pursuant to a requirement for division.
  • compositions comprising cellulose derivatives except nitrocellulose, compositions comprising, respectively,
  • polyvinyl acetals polyvinyl acetals, methacrylic acid derivatives, polythene compositions, and similar durable plastic and/or thermoplastic materials.
  • This material preferably is disposed about the conductor as a solid sheath, extruded sheaths being preferred.
  • the electric blasting initiator product of our invention possesses several outstanding advantages.
  • the combination of the rubber-like plug molded about the thermoplastic insulation produces an electric blasting initiator of enhanced water resistance due to the effective juncture of the plug material with the insulation as a result of the vulcanizing and/or molding process in which the plug is formed.
  • remarkably improved abrasion resistance results at the locus in which the leg wires emerge from the plug at the mouth of the shell, perhaps due to the slight, temporary give in the plug when pressure is exercised on the leg wires and due in particular to the effective seal between plug material and plastic insulation on said wires.
  • thermoferred embodiments of our invention It will be loaded shell, spaced leg wires provided with insulation comprising a thermoplastic material entering the mouth of said shell, a plug of rubberloaded shell, the closure elements comprising leg 7 wires provided with insulation comprising a thermoplastic material, a plug of rubber-like material of the character described formed about said leg wires and in contact with said thermoplastic insulation substantially in the absence of the intermingling of said thermoplastic insulation with said rubber-like composition, said wires and plug being disposed in a position closing the mouth of said shell, and a cn'mp extending around the circumference of said shell in the region enclosing said plug forcing the shell wall into and deforming said rubber-like plug to complete a water impervious juncture.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Insulated Conductors (AREA)
US292590A 1939-08-30 1939-08-30 Electric blasting initiator Expired - Lifetime US2228873A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE461595D BE461595A (enrdf_load_stackoverflow) 1939-08-30
US292590A US2228873A (en) 1939-08-30 1939-08-30 Electric blasting initiator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US292590A US2228873A (en) 1939-08-30 1939-08-30 Electric blasting initiator

Publications (1)

Publication Number Publication Date
US2228873A true US2228873A (en) 1941-01-14

Family

ID=23125332

Family Applications (1)

Application Number Title Priority Date Filing Date
US292590A Expired - Lifetime US2228873A (en) 1939-08-30 1939-08-30 Electric blasting initiator

Country Status (2)

Country Link
US (1) US2228873A (enrdf_load_stackoverflow)
BE (1) BE461595A (enrdf_load_stackoverflow)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10309199B2 (en) * 2014-05-05 2019-06-04 Dynaenergetics Gmbh & Co. Kg Initiator head assembly
US10844696B2 (en) 2018-07-17 2020-11-24 DynaEnergetics Europe GmbH Positioning device for shaped charges in a perforating gun module
US10845177B2 (en) 2018-06-11 2020-11-24 DynaEnergetics Europe GmbH Conductive detonating cord for perforating gun
US11021923B2 (en) 2018-04-27 2021-06-01 DynaEnergetics Europe GmbH Detonation activated wireline release tool
US11125056B2 (en) 2013-07-18 2021-09-21 DynaEnergetics Europe GmbH Perforation gun components and system
US11225848B2 (en) 2020-03-20 2022-01-18 DynaEnergetics Europe GmbH Tandem seal adapter, adapter assembly with tandem seal adapter, and wellbore tool string with adapter assembly
US11339614B2 (en) 2020-03-31 2022-05-24 DynaEnergetics Europe GmbH Alignment sub and orienting sub adapter
US11480038B2 (en) 2019-12-17 2022-10-25 DynaEnergetics Europe GmbH Modular perforating gun system
US11648513B2 (en) 2013-07-18 2023-05-16 DynaEnergetics Europe GmbH Detonator positioning device
US11713625B2 (en) 2021-03-03 2023-08-01 DynaEnergetics Europe GmbH Bulkhead
US11753889B1 (en) 2022-07-13 2023-09-12 DynaEnergetics Europe GmbH Gas driven wireline release tool
US11808093B2 (en) 2018-07-17 2023-11-07 DynaEnergetics Europe GmbH Oriented perforating system
USD1010758S1 (en) 2019-02-11 2024-01-09 DynaEnergetics Europe GmbH Gun body
USD1019709S1 (en) 2019-02-11 2024-03-26 DynaEnergetics Europe GmbH Charge holder
US11946728B2 (en) 2019-12-10 2024-04-02 DynaEnergetics Europe GmbH Initiator head with circuit board
US11952872B2 (en) 2013-07-18 2024-04-09 DynaEnergetics Europe GmbH Detonator positioning device
US11988049B2 (en) 2020-03-31 2024-05-21 DynaEnergetics Europe GmbH Alignment sub and perforating gun assembly with alignment sub
US12000267B2 (en) 2021-09-24 2024-06-04 DynaEnergetics Europe GmbH Communication and location system for an autonomous frack system
USD1034879S1 (en) 2019-02-11 2024-07-09 DynaEnergetics Europe GmbH Gun body
US12091919B2 (en) 2021-03-03 2024-09-17 DynaEnergetics Europe GmbH Bulkhead
USRE50204E1 (en) 2013-08-26 2024-11-12 DynaEnergetics Europe GmbH Perforating gun and detonator assembly
US12253339B2 (en) 2021-10-25 2025-03-18 DynaEnergetics Europe GmbH Adapter and shaped charge apparatus for optimized perforation jet
US12312925B2 (en) 2021-12-22 2025-05-27 DynaEnergetics Europe GmbH Manually oriented internal shaped charge alignment system and method of use
US12312922B2 (en) 2021-01-08 2025-05-27 DynaEnergetics Europe GmbH Perforating gun assembly and components
US12320238B2 (en) 2020-12-21 2025-06-03 DynaEnergetics Europe GmbH Encapsulated shaped charge
US12338718B2 (en) 2021-03-03 2025-06-24 DynaEnergetics Europe GmbH Orienting perforation gun assembly
US12366142B2 (en) 2021-03-03 2025-07-22 DynaEnergetics Europe GmbH Modular perforating gun system
US12378833B2 (en) 2022-07-13 2025-08-05 DynaEnergetics Europe GmbH Gas driven wireline release tool

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11542792B2 (en) 2013-07-18 2023-01-03 DynaEnergetics Europe GmbH Tandem seal adapter for use with a wellbore tool, and wellbore tool string including a tandem seal adapter
US12215576B2 (en) 2013-07-18 2025-02-04 DynaEnergetics Europe GmbH Single charge perforation gun and system
US11788389B2 (en) 2013-07-18 2023-10-17 DynaEnergetics Europe GmbH Perforating gun assembly having seal element of tandem seal adapter and coupling of housing intersecting with a common plane perpendicular to longitudinal axis
US12203350B2 (en) 2013-07-18 2025-01-21 DynaEnergetics Europe GmbH Detonator positioning device
US11661823B2 (en) 2013-07-18 2023-05-30 DynaEnergetics Europe GmbH Perforating gun assembly and wellbore tool string with tandem seal adapter
US12078038B2 (en) 2013-07-18 2024-09-03 DynaEnergetics Europe GmbH Perforating gun orientation system
US11125056B2 (en) 2013-07-18 2021-09-21 DynaEnergetics Europe GmbH Perforation gun components and system
US11648513B2 (en) 2013-07-18 2023-05-16 DynaEnergetics Europe GmbH Detonator positioning device
US11608720B2 (en) 2013-07-18 2023-03-21 DynaEnergetics Europe GmbH Perforating gun system with electrical connection assemblies
US11952872B2 (en) 2013-07-18 2024-04-09 DynaEnergetics Europe GmbH Detonator positioning device
US12060778B2 (en) 2013-07-18 2024-08-13 DynaEnergetics Europe GmbH Perforating gun assembly
USRE50204E1 (en) 2013-08-26 2024-11-12 DynaEnergetics Europe GmbH Perforating gun and detonator assembly
US11078764B2 (en) * 2014-05-05 2021-08-03 DynaEnergetics Europe GmbH Initiator head assembly
US10669822B2 (en) * 2014-05-05 2020-06-02 DynaEnergetics Europe GmbH Method of making an initiator head assembly
US10309199B2 (en) * 2014-05-05 2019-06-04 Dynaenergetics Gmbh & Co. Kg Initiator head assembly
US11549343B2 (en) * 2014-05-05 2023-01-10 DynaEnergetics Europe GmbH Initiator head assembly
US20210363863A1 (en) * 2014-05-05 2021-11-25 DynaEnergetics Europe GmbH Initiator head assembly
US11634956B2 (en) 2018-04-27 2023-04-25 DynaEnergetics Europe GmbH Detonation activated wireline release tool
US11021923B2 (en) 2018-04-27 2021-06-01 DynaEnergetics Europe GmbH Detonation activated wireline release tool
US12044108B2 (en) 2018-06-11 2024-07-23 DynaEnergetics Europe GmbH Perforating gun with conductive detonating cord
US11385036B2 (en) 2018-06-11 2022-07-12 DynaEnergetics Europe GmbH Conductive detonating cord for perforating gun
US10845177B2 (en) 2018-06-11 2020-11-24 DynaEnergetics Europe GmbH Conductive detonating cord for perforating gun
US11773698B2 (en) 2018-07-17 2023-10-03 DynaEnergetics Europe GmbH Shaped charge holder and perforating gun
US11339632B2 (en) 2018-07-17 2022-05-24 DynaEnergetics Europe GmbH Unibody gun housing, tool string incorporating same, and method of assembly
US10844696B2 (en) 2018-07-17 2020-11-24 DynaEnergetics Europe GmbH Positioning device for shaped charges in a perforating gun module
US11808093B2 (en) 2018-07-17 2023-11-07 DynaEnergetics Europe GmbH Oriented perforating system
US10920543B2 (en) 2018-07-17 2021-02-16 DynaEnergetics Europe GmbH Single charge perforating gun
US11525344B2 (en) 2018-07-17 2022-12-13 DynaEnergetics Europe GmbH Perforating gun module with monolithic shaped charge positioning device
USD1010758S1 (en) 2019-02-11 2024-01-09 DynaEnergetics Europe GmbH Gun body
USD1019709S1 (en) 2019-02-11 2024-03-26 DynaEnergetics Europe GmbH Charge holder
USD1034879S1 (en) 2019-02-11 2024-07-09 DynaEnergetics Europe GmbH Gun body
US11946728B2 (en) 2019-12-10 2024-04-02 DynaEnergetics Europe GmbH Initiator head with circuit board
US12332034B2 (en) 2019-12-10 2025-06-17 DynaEnergetics Europe GmbH Initiator head with circuit board
US11480038B2 (en) 2019-12-17 2022-10-25 DynaEnergetics Europe GmbH Modular perforating gun system
USD1041608S1 (en) 2020-03-20 2024-09-10 DynaEnergetics Europe GmbH Outer connector
US11814915B2 (en) 2020-03-20 2023-11-14 DynaEnergetics Europe GmbH Adapter assembly for use with a wellbore tool string
US11225848B2 (en) 2020-03-20 2022-01-18 DynaEnergetics Europe GmbH Tandem seal adapter, adapter assembly with tandem seal adapter, and wellbore tool string with adapter assembly
US11988049B2 (en) 2020-03-31 2024-05-21 DynaEnergetics Europe GmbH Alignment sub and perforating gun assembly with alignment sub
US11339614B2 (en) 2020-03-31 2022-05-24 DynaEnergetics Europe GmbH Alignment sub and orienting sub adapter
US12320238B2 (en) 2020-12-21 2025-06-03 DynaEnergetics Europe GmbH Encapsulated shaped charge
US12312922B2 (en) 2021-01-08 2025-05-27 DynaEnergetics Europe GmbH Perforating gun assembly and components
US12091919B2 (en) 2021-03-03 2024-09-17 DynaEnergetics Europe GmbH Bulkhead
US11713625B2 (en) 2021-03-03 2023-08-01 DynaEnergetics Europe GmbH Bulkhead
US12338718B2 (en) 2021-03-03 2025-06-24 DynaEnergetics Europe GmbH Orienting perforation gun assembly
US12366142B2 (en) 2021-03-03 2025-07-22 DynaEnergetics Europe GmbH Modular perforating gun system
US12000267B2 (en) 2021-09-24 2024-06-04 DynaEnergetics Europe GmbH Communication and location system for an autonomous frack system
US12253339B2 (en) 2021-10-25 2025-03-18 DynaEnergetics Europe GmbH Adapter and shaped charge apparatus for optimized perforation jet
US12312925B2 (en) 2021-12-22 2025-05-27 DynaEnergetics Europe GmbH Manually oriented internal shaped charge alignment system and method of use
US11753889B1 (en) 2022-07-13 2023-09-12 DynaEnergetics Europe GmbH Gas driven wireline release tool
US12065896B2 (en) 2022-07-13 2024-08-20 DynaEnergetics Europe GmbH Gas driven wireline release tool
US12378833B2 (en) 2022-07-13 2025-08-05 DynaEnergetics Europe GmbH Gas driven wireline release tool

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