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US2992611A - Seismic prospecting device - Google Patents

Seismic prospecting device Download PDF

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Publication number
US2992611A
US2992611A US745002A US74500258A US2992611A US 2992611 A US2992611 A US 2992611A US 745002 A US745002 A US 745002A US 74500258 A US74500258 A US 74500258A US 2992611 A US2992611 A US 2992611A
Authority
US
United States
Prior art keywords
explosive
cord
charge
charges
delay
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
US745002A
Other languages
English (en)
Inventor
Robert W Felch
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
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US745002A priority Critical patent/US2992611A/en
Priority to DEP23024A priority patent/DE1109579B/de
Priority to DEP24552A priority patent/DE1117466B/de
Application granted granted Critical
Publication of US2992611A publication Critical patent/US2992611A/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
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/06—Relative timing of multiple charges
    • 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
    • F42B3/02—Blasting cartridges, i.e. case and explosive adapted to be united into assemblies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/04—Details
    • G01V1/06—Ignition devices
    • G01V1/08—Ignition devices involving time-delay devices

Definitions

  • the sensitiveness is determined by the distance the detonation stimulus from the initiating charge will initiate the receptor charge in an end-to-end relationship.
  • the ability to propagate over a gap is primarily a function of the sensitiveness of the receiving cartridge to initiation by detonation by influence or to impact from particles from the initiating charge.
  • nitroglycerin-free explosive the detonation will not be propagated over a l-foot distance; however, to insure proper delay, the charges are usually placed approximately five feet apart.
  • a more sensitive explosive, such as a seismograph gelatin dynamite will propagate over approximately a 40-inch distance. Accordingly, a greater distance between changes must be provided to insure proper delay.
  • Example 1 Acne-pound charge of a cap-sensitive ammonium nitrate composition and a one-pound charge of a cap-insensitive ammonium nitrate composition, both in metal containers, were positioned 60.inches apart by a rigid, tubular delay connector assembly placed between and connected to the charges.
  • the delay connector assembly was assembled in the following manner:
  • a device adapted to rigidly maintain two high explosive charges in fixed spatial relationship and to initiate the second at said charges a predetermined interval following the detonation of the first charge comprising a rigid tubular casing having at least two perforations in its curved surface, explosive cord of a length greater than the length of said casing contained entirely within said casing, said explosive cord having from 0.1 to 5 grains of a high-velocity detonating explosive per foot of length encased within a metal sheath, a metal shell at each end of said explosive cord containing a charge of an initiating explosive, and connecting means at each end of said casing for connecting an explosive charge thereto, one of said connecting means including a priming charge of a detonating explosive, one end of said explosive cord being retained by one of said connecting means and the other end by the opposite connecting means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
US745002A 1958-06-27 1958-06-27 Seismic prospecting device Expired - Lifetime US2992611A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US745002A US2992611A (en) 1958-06-27 1958-06-27 Seismic prospecting device
DEP23024A DE1109579B (de) 1958-06-27 1959-06-26 Gestreckte Ladung, besonders fuer seismische Zwecke
DEP24552A DE1117466B (de) 1958-06-27 1960-03-04 Gestreckte Ladung, insbesondere fuer seismische Zwecke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US745002A US2992611A (en) 1958-06-27 1958-06-27 Seismic prospecting device

Publications (1)

Publication Number Publication Date
US2992611A true US2992611A (en) 1961-07-18

Family

ID=24994811

Family Applications (1)

Application Number Title Priority Date Filing Date
US745002A Expired - Lifetime US2992611A (en) 1958-06-27 1958-06-27 Seismic prospecting device

Country Status (2)

Country Link
US (1) US2992611A (de)
DE (2) DE1109579B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112699A (en) * 1961-04-14 1963-12-03 Du Pont Sonic pulse generator
US3131633A (en) * 1958-12-10 1964-05-05 Pan American Petroleum Corp Velocity-matching seismic charge unit
US3150590A (en) * 1961-10-20 1964-09-29 Pan American Petroleum Corp Explosive charge unit
US3207073A (en) * 1962-12-21 1965-09-21 Du Pont Explosive cord and assembly
US3289583A (en) * 1965-04-21 1966-12-06 Pan American Petroleum Corp Explosive charge
US4284006A (en) * 1979-08-13 1981-08-18 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges
US4286520A (en) * 1979-08-13 1981-09-01 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges
US4313380A (en) * 1978-09-15 1982-02-02 Standard Oil Company (Indiana) Distributed charge for seismic prospecting
US4334591A (en) * 1978-11-27 1982-06-15 Mapco, Inc. Transporter for low energy seismic source

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157121B (de) * 1962-05-09 1963-11-07 F G Baucus K G Vorrichtung zur automatischen Folgezuendung pyrotechnischer Rauch- oder Leuchtkoerper

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US701173A (en) * 1901-06-04 1902-05-27 James M Doyle Safety device for blasting purposes.
US2224565A (en) * 1937-08-31 1940-12-10 Hercules Powder Co Ltd Casing for boreholes
CA493862A (en) * 1953-06-23 B. Horn Gerald Explosive
US2655993A (en) * 1948-01-22 1953-10-20 Thomas C Bannon Control device for gun perforators
US2707439A (en) * 1954-05-26 1955-05-03 Canadian Ind 1954 Ltd Short interval delay blasting device
US2724452A (en) * 1951-03-30 1955-11-22 Exxon Research Engineering Co Seismic prospecting
US2796834A (en) * 1956-03-09 1957-06-25 Canadian Ind Short interval delay blasting device
US2808894A (en) * 1953-04-27 1957-10-08 Pan American Petroleum Corp Seismic wave generation
US2823609A (en) * 1953-04-15 1958-02-18 Du Pont Device for seismic prospecting
US2891475A (en) * 1954-02-01 1959-06-23 Ici Ltd Fuse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049757B (de) 1959-01-29 Simsbury Conn. Robert Waldo Felch Wenonah N. J. und George Adelbert Noddin Sewell N. J. David John Andrew (V. St. A.) Detonationszündschnur
DE845465C (de) * 1950-01-05 1952-07-31 Ernst Morhenn Schiessverfahren, insbesondere fuer den Streckenvortrieb im Grubenbetrieb
DE1009084B (de) 1955-02-05 1957-05-23 Hermann Fiene Nicht nachgluehender Zwischenhohlraum-Besatz bzw. Abstandhalter fuer gestreckte Sprengladungen
DE1051707B (de) 1956-09-25 1959-02-26 David John Andrew Detonationszuendschnur

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA493862A (en) * 1953-06-23 B. Horn Gerald Explosive
US701173A (en) * 1901-06-04 1902-05-27 James M Doyle Safety device for blasting purposes.
US2224565A (en) * 1937-08-31 1940-12-10 Hercules Powder Co Ltd Casing for boreholes
US2655993A (en) * 1948-01-22 1953-10-20 Thomas C Bannon Control device for gun perforators
US2724452A (en) * 1951-03-30 1955-11-22 Exxon Research Engineering Co Seismic prospecting
US2823609A (en) * 1953-04-15 1958-02-18 Du Pont Device for seismic prospecting
US2808894A (en) * 1953-04-27 1957-10-08 Pan American Petroleum Corp Seismic wave generation
US2891475A (en) * 1954-02-01 1959-06-23 Ici Ltd Fuse
US2707439A (en) * 1954-05-26 1955-05-03 Canadian Ind 1954 Ltd Short interval delay blasting device
US2796834A (en) * 1956-03-09 1957-06-25 Canadian Ind Short interval delay blasting device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3131633A (en) * 1958-12-10 1964-05-05 Pan American Petroleum Corp Velocity-matching seismic charge unit
US3112699A (en) * 1961-04-14 1963-12-03 Du Pont Sonic pulse generator
US3150590A (en) * 1961-10-20 1964-09-29 Pan American Petroleum Corp Explosive charge unit
US3207073A (en) * 1962-12-21 1965-09-21 Du Pont Explosive cord and assembly
US3289583A (en) * 1965-04-21 1966-12-06 Pan American Petroleum Corp Explosive charge
US4313380A (en) * 1978-09-15 1982-02-02 Standard Oil Company (Indiana) Distributed charge for seismic prospecting
US4334591A (en) * 1978-11-27 1982-06-15 Mapco, Inc. Transporter for low energy seismic source
US4284006A (en) * 1979-08-13 1981-08-18 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges
US4286520A (en) * 1979-08-13 1981-09-01 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges

Also Published As

Publication number Publication date
DE1117466B (de) 1961-11-16
DE1109579B (de) 1961-06-22

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