GB705002A - Improvements in an arrangement for firing from a distance charges of powder or explosive for operating apparatus situated in boreholes - Google Patents
Improvements in an arrangement for firing from a distance charges of powder or explosive for operating apparatus situated in boreholesInfo
- Publication number
- GB705002A GB705002A GB29147/51A GB2914751A GB705002A GB 705002 A GB705002 A GB 705002A GB 29147/51 A GB29147/51 A GB 29147/51A GB 2914751 A GB2914751 A GB 2914751A GB 705002 A GB705002 A GB 705002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- charge
- firing
- charges
- primed
- cable
- 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
Links
- 238000010304 firing Methods 0.000 title abstract 11
- 239000002360 explosive Substances 0.000 title abstract 3
- 239000000843 powder Substances 0.000 title 1
- 230000037452 priming Effects 0.000 abstract 3
- 238000005070 sampling Methods 0.000 abstract 3
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Geophysics And Detection Of Objects (AREA)
- Sampling And Sample Adjustment (AREA)
- Air Bags (AREA)
Abstract
705,002. Selective firing of explosive charges. SOC. DE PROSPECTION ELECTRIQUE PROCEDES SCHLUMBERGER. Dec. 12, 1951 [Jan. 30, 1951], No. 29147/51. Classes 9(1) and 85 In an arrangement for 'the selective firing in sequence of a plurality of charges of explosive, particularly charges for operating apparatus in boreholes such as the sample taking means of a sampling tool, wherein the electrical firing of a charge produces the mechanical priming of an adjacent charge, the unprimed charges are divided into groups, each group R 1 , R 2 , R 3 being inserted into one of a corresponding number of electric circuits 1, 2, 3 which cannot be fed simultaneously. Before the firing operation one charge R 1-1 , R 2-2 , belonging to each of the different circuits, minus one, is primed; on firing a primed charge R 1-1 it mechanically primes a desired charge R 3-1 in the circuit having no primed charge. In the event of a misfire the firing sequence can be maintained, the arrangement being such that the primed charge to be next fired after the misfired charge can prime a charge in each of the unprimed circuits. Before priming the igniters are earthed at both ends. The firing of a charge results in the priming of, at the most, one charge in each series. In the embodiment shown of the sampling tool, on the firing of charge 6-1, sampling means 7-1, which is connected by a cable 8-1 to the body 5 of the tool, is ejected and, in the drawing out of cable 8-1, pulls wire 12-3 that is connected to it clear of the spring contact 10-3 of the igniter R, of charge 6-3, allowing contact 10-3 to engage with the electric cable 3 of firing system. Wire 12-3 passes through cable 8-2 of means 8-1, so that in the event of the misfire of charge 6-1 the subsequent firing of charge 6-2 will prime igniter R 3 . The system may be suitably modified to allow for more than two consecutive misfires.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1044580T | 1951-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB705002A true GB705002A (en) | 1954-03-03 |
Family
ID=9427133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29147/51A Expired GB705002A (en) | 1951-01-30 | 1951-12-12 | Improvements in an arrangement for firing from a distance charges of powder or explosive for operating apparatus situated in boreholes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2761385A (en) |
| DE (1) | DE920233C (en) |
| FR (1) | FR1044580A (en) |
| GB (1) | GB705002A (en) |
| NL (1) | NL80264C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3052185A (en) * | 1954-07-02 | 1962-09-04 | Apstein Maurice | Electric switch |
| NL236332A (en) * | 1958-02-20 | |||
| FR1264620A (en) * | 1960-05-12 | 1961-06-23 | Schlumberger Prospection | Improvements to devices for remote firing of powder or explosive charges |
| US3227228A (en) * | 1963-05-24 | 1966-01-04 | Clyde E Bannister | Rotary drilling and borehole coring apparatus and method |
| US4100978A (en) * | 1974-12-23 | 1978-07-18 | Boop Gene T | Technique for disarming and arming electrically fireable explosive well tool |
| US4051907A (en) * | 1976-03-10 | 1977-10-04 | N L Industries, Inc. | Selective firing system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1738595A (en) * | 1927-05-17 | 1929-12-10 | Hercules Powder Co Ltd | Method for firing explosives |
| US2307729A (en) * | 1939-03-17 | 1943-01-05 | Foster James Lewis | Well explosive |
| US2343087A (en) * | 1940-01-23 | 1944-02-29 | Schlumberger Marcel | Switching mechanism for borehole apparatus |
| US2331058A (en) * | 1942-08-14 | 1943-10-05 | Lane Wells Co | Firing apparatus for gun perforators |
| US2511408A (en) * | 1944-06-09 | 1950-06-13 | Schlumberger Well Surv Corp | Side wall sample taker |
| US2546686A (en) * | 1947-03-21 | 1951-03-27 | Du Pont | Blasting device |
| US2543823A (en) * | 1948-03-26 | 1951-03-06 | Standard Oil Dev Co | Casing perforating gun |
| US2569511A (en) * | 1948-12-22 | 1951-10-02 | Du Pont | Blasting device |
-
1951
- 1951-01-30 FR FR1044580D patent/FR1044580A/en not_active Expired
- 1951-10-24 US US252892A patent/US2761385A/en not_active Expired - Lifetime
- 1951-12-12 GB GB29147/51A patent/GB705002A/en not_active Expired
- 1951-12-15 NL NL166080A patent/NL80264C/nl active
-
1952
- 1952-01-06 DE DES26713A patent/DE920233C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2761385A (en) | 1956-09-04 |
| DE920233C (en) | 1954-11-15 |
| FR1044580A (en) | 1953-11-19 |
| NL80264C (en) | 1955-08-15 |
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