CA2145740A1 - A perforating gun having a plurality of charges - Google Patents

A perforating gun having a plurality of charges

Info

Publication number
CA2145740A1
CA2145740A1 CA002145740A CA2145740A CA2145740A1 CA 2145740 A1 CA2145740 A1 CA 2145740A1 CA 002145740 A CA002145740 A CA 002145740A CA 2145740 A CA2145740 A CA 2145740A CA 2145740 A1 CA2145740 A1 CA 2145740A1
Authority
CA
Canada
Prior art keywords
perforating apparatus
charges
initiators
disposed
conductor
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.)
Granted
Application number
CA002145740A
Other languages
French (fr)
Other versions
CA2145740C (en
Inventor
James Emmert Brooks
Nolan C. Lerche
Clifford L. Aseltine (Deceased)
Robert A. Parrott
Kenneth E. Rozek
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.)
Schlumberger Canada Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA2599056A priority Critical patent/CA2599056C/en
Publication of CA2145740A1 publication Critical patent/CA2145740A1/en
Application granted granted Critical
Publication of CA2145740C publication Critical patent/CA2145740C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/02—Arranging blasting cartridges to form an assembly
    • 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

Abstract

A perforating apparatus adapted to be disposed in a wellbore includes a plurality of shaped charges, an electrical current carrying conductor, and a plurality of exploding foil or exploding bridgewire initiators disposed, respectively, between the the plurality of charges and the current carrying conductor for simultaneously detonating thereby simultaneously detonating all of the plurality of shaped charges of the perforating apparatus in response to a current flowing in the conductor. Each of the shaped charges include a new secondary explosive primer disposed in the apex of the charge for detonating in response to a detonation of the exploding foil or exploding bridgewire initiator. The electrical conductor may include a flat cable having a plurality of such initiators spaced apart at predetermined intervals along the cable and adapted to wrap helically-around the perforating apparatus until each of the initiators abut against a shaped charge of the plurality of charges in the perforating apparatus. In an alternate embodiment, the electrical current carrying conductor may include a flat sheet having a specific length and width and including a plurality of such initiators. The flat sheet is adapted to wrap around the entire circumference of the perforating apparatus until each of the initiators in the sheet abut against a shaped charge of the plurality of charges in the perforating apparatus. The current in the conductor may originate from a compressed magnetic flux (CMF) current pulse generator or from a charging capacitor of a conventional system including one or more charging capacitors and associated discharge switches. When the perforating apparatus includes a first and second perforator separated by an adaptor, the adaptor includes a pressure bulkhead adapted to seal the first perforator from the second perforator, an explosive disposed in contact against one side of the bulkhead and a piezoelectric ceramic disposed in contact against the other side of the bulkhead.
CA002145740A 1994-03-29 1995-03-28 A perforating gun having a plurality of charges Expired - Fee Related CA2145740C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2599056A CA2599056C (en) 1994-03-29 1995-03-28 A perforating gun having a plurality of charges

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/220,071 US5505134A (en) 1993-09-01 1994-03-29 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
US08/220,071 1994-03-29

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2599056A Division CA2599056C (en) 1994-03-29 1995-03-28 A perforating gun having a plurality of charges

Publications (2)

Publication Number Publication Date
CA2145740A1 true CA2145740A1 (en) 1995-09-30
CA2145740C CA2145740C (en) 2007-12-18

Family

ID=22821923

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002145740A Expired - Fee Related CA2145740C (en) 1994-03-29 1995-03-28 A perforating gun having a plurality of charges

Country Status (6)

Country Link
US (1) US5505134A (en)
EP (1) EP0675262B1 (en)
AU (1) AU697672B2 (en)
CA (1) CA2145740C (en)
DE (1) DE69513319T2 (en)
GB (1) GB2288005B (en)

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US7980309B2 (en) 2008-04-30 2011-07-19 Halliburton Energy Services, Inc. Method for selective activation of downhole devices in a tool string

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7980309B2 (en) 2008-04-30 2011-07-19 Halliburton Energy Services, Inc. Method for selective activation of downhole devices in a tool string

Also Published As

Publication number Publication date
DE69513319D1 (en) 1999-12-23
DE69513319T2 (en) 2000-06-08
EP0675262A1 (en) 1995-10-04
AU697672B2 (en) 1998-10-15
CA2145740C (en) 2007-12-18
AU1613095A (en) 1995-10-05
EP0675262B1 (en) 1999-11-17
GB9506310D0 (en) 1995-05-17
GB2288005B (en) 1998-07-29
GB2288005A (en) 1995-10-04
US5505134A (en) 1996-04-09

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130328