GB660285A - Explosively operated device for perforating well casings - Google Patents
Explosively operated device for perforating well casingsInfo
- Publication number
- GB660285A GB660285A GB2852248A GB2852248A GB660285A GB 660285 A GB660285 A GB 660285A GB 2852248 A GB2852248 A GB 2852248A GB 2852248 A GB2852248 A GB 2852248A GB 660285 A GB660285 A GB 660285A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cavity
- charge
- cartridges
- liner
- metal
- 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
- 239000002184 metal Substances 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 229910000831 Steel Inorganic materials 0.000 abstract 2
- 239000004411 aluminium Substances 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 2
- 238000005474 detonation Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000010959 steel Substances 0.000 abstract 2
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000002360 explosive Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000003129 oil well Substances 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 238000004080 punching Methods 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
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
- F42B3/08—Blasting cartridges, i.e. case and explosive with cavities in the charge, e.g. hollow-charge blasting cartridges
-
- 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
- E21B43/117—Shaped-charge perforators
Landscapes
- 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)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
660,285. Punching. WELEX JET SERVICES, Inc. Nov. 3, 1948, No. 28522/48. Class 83 (iv). [Also in Group XXI] A device 10 for perforating the casings of oil wells comprises a housing 12 in which spacer blocks 16 support cartridges 15, each containing a cavity explosive charge 19, the cartridges. being in the housing with the cavities directed laterally and successive cartridges being mutually perpendicular. Each cavity has a frusto-conical liner 21 and in the rear of each charge is a detonator 22 which is initiated by an element 23 which may be a fuze cord or leads in an electric circuit. The charges may be detonated simultaneously or successively. Each charge is enclosed in a container 18 which may be of metal or any other suitable material and prevents the acess of liquid into the cavity while maintaining a " stand-off " space 28 in front of the cavity to give maximum penetration when the charge is fired. The optimum effect is obtained when the " stand-off " distance is about equal to the maximum diameter of the cavity. The liner may be of metal such as steel or aluminium, brass, copper, glass and thermo-setting plastic materials are also mentioned. Steel liners may have a thickness of 1 to 3 per cent of the charge diameter and aluminium liners 2 to 6 per cent. The maximum cavity diameter, may be from one to two times the thickness of the well casing. In a modification (Fig. 5), the cartridges instead of being inserted in a closed housing are supported by a band 38 of metal or thermo-setting plastic composition. A strap 39 holds the cartridge in position and the band 38 may be twisted at intervals to hold successive cartridges at different orientations. The cartridge itself may be modified to contain a sharge 53 with a cavity at each end having a liner 54. The ends of the cylindrical container 51 are domed and the detonator 57 is placed at the centre of the charge. Detonation may be initiated by dropping a weight along the cable supporting the device in the bore-hole, the weight being arranged to strike a mechanism which will bring about detonation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2852248A GB660285A (en) | 1948-11-03 | 1948-11-03 | Explosively operated device for perforating well casings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2852248A GB660285A (en) | 1948-11-03 | 1948-11-03 | Explosively operated device for perforating well casings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB660285A true GB660285A (en) | 1951-11-07 |
Family
ID=10276959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2852248A Expired GB660285A (en) | 1948-11-03 | 1948-11-03 | Explosively operated device for perforating well casings |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB660285A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2811921A (en) * | 1952-11-24 | 1957-11-05 | Borg Warner | Shaped explosive charge apparatus with adjustable charge spacing |
| US2837995A (en) * | 1952-12-26 | 1958-06-10 | Pgac Dev Co | Unsymmetrically encased shaped explosive charges |
| US2968243A (en) * | 1956-07-09 | 1961-01-17 | Tubing gun | |
| US2988993A (en) * | 1956-02-13 | 1961-06-20 | Aerojet General Co | Firing system for well perforator |
| FR2667140A1 (en) * | 1990-09-26 | 1992-03-27 | Commissariat Energie Atomique | PYROTECHNIC DEVICE FOR PRODUCING JETS OF HIGH - SPEED MATERIAL AND MULTI - PURPOSE INSTALLATION. |
| GB2354309A (en) * | 1978-05-22 | 2001-03-21 | Hunting Eng Ltd | Explosive devices |
-
1948
- 1948-11-03 GB GB2852248A patent/GB660285A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2811921A (en) * | 1952-11-24 | 1957-11-05 | Borg Warner | Shaped explosive charge apparatus with adjustable charge spacing |
| US2837995A (en) * | 1952-12-26 | 1958-06-10 | Pgac Dev Co | Unsymmetrically encased shaped explosive charges |
| US2988993A (en) * | 1956-02-13 | 1961-06-20 | Aerojet General Co | Firing system for well perforator |
| US2968243A (en) * | 1956-07-09 | 1961-01-17 | Tubing gun | |
| GB2354309A (en) * | 1978-05-22 | 2001-03-21 | Hunting Eng Ltd | Explosive devices |
| GB2354309B (en) * | 1978-05-22 | 2001-07-04 | Hunting Eng Ltd | Explosive devices |
| FR2667140A1 (en) * | 1990-09-26 | 1992-03-27 | Commissariat Energie Atomique | PYROTECHNIC DEVICE FOR PRODUCING JETS OF HIGH - SPEED MATERIAL AND MULTI - PURPOSE INSTALLATION. |
| US5159152A (en) * | 1990-09-26 | 1992-10-27 | Commissariat A L'energie Atomique | Pyrotechnic device for producing material jets at very high speeds and multiple perforation installation |
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