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Topic: Detonation cord


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  Shot direction indicating device - Patent 7044236
The apparatus of claim 5 where detonation of the detonation cord deforms the inner surface of said annulus toward the outer surface of said annulus thereby locking said indication device in the stationary position.
The detonation cord 35 is activated on one end and transfers the energy along its length to the shaped charges (not shown) where they in turn are detonated by the detonation cord 35 for perforating the sides of a well bore.
In the case where the down hole tool 10 is a perforating gun, upon detonation of the detonation cord 35 a shock wave is produced of sufficient force to deform the inner surface 22 and impinge it against the outer surface 23.
www.freepatentsonline.com /7044236.html   (2352 words)

  
 Explosively opened production valve including a frangible breakup element operated by tubing pressure or rathole ...
A detonating cord tube 24 is sealingly connected to one end of the piston 20c, the detonating cord tube receiving a detonating cord 26.
The piston 20c includes a bore in which the detonating cord 26 is disposed, the detonating cord from the detonating cord tube 24 passing through the piston 20c of the valve 20 and ultimately being connected to the shaped charges disposed within the perforating gun 22.
However, in accordance with the present invention, when the detonation wave propagating within detonating cord 26 passes through the center of the frangible breakup elements 20e, due to the material (cast iron) of which the breakup elements 20e are made, all of the individual breakup elements 20e will shatter into a multitude of pieces.
www.freepatentsonline.com /5318126.html   (3721 words)

  
  Detonating cord Information
Detonating cord, also called detonation cord, detacord, det. cord, detcord, primer cord, primacord or cordtex, is a thin, flexible tube with an explosive core.
The velocity of detonation is sufficient to use it for synchronizing multiple charges to detonate almost simultaneously even if the charges are placed at different distances from the point of initiation.
This is a typical "default" rating for connecting charges for blasting; lighter detonating cords may be used for "low noise blasting" and movie special effects, while heavier cords are used where the cord is employed to have some direct explosive effect.
www.bookrags.com /wiki/Detonating_cord   (677 words)

  
 Detonating cord
Detonating cord, also called detonation cord, detacord, det. cord, detcord, primer cord, or primacord, is a thin, flexible tube with an explosive core.
While it has the appearance of nylon cord, the core is actually a plastic explosive, usually PETN (Pentrite), and it is initiated by the use of a blasting cap.
Detonating cord has been reported to have occasionally been used during wartime to restrain prisoners if no handcuffs were available; the cord was first demonstrated on a tree or other object, then tied to the prisoners.
www.free-download-soft.com /info/detonation-cord.html   (424 words)

  
 D
Detonation velocities lie in the approximate range of 1,400 to 9,000 m/s = 5,000 to 30,000 ft/s; slower explosive reactions, which are propagated by thermal conduction and radiation, are known as deflagration.
A chemical reaction in a detonable material in which the reaction front advances with a velocity which is appreciably lower than that which is the characteristic detonation velocity for the material in question.
In general, detonators are classified in accordance with the method of initiation such as percussion, stab, electric, friction, flash chemical, etc. A cap or capsule of sensitive explosive material used to initiate a charge of high explosives.
www.hydrocut.com /Terms/D.html   (2740 words)

  
 [No title]
Detonating Cord Connections A detonating cord clip (fig 1-33) or square knot pulled tight is used to splice the ends of detonating cord.
To insure positive detonation of the ammonium nitrate cratering charge all charges should be dual primed with a 1-pound brick of explosive taped to the side of the charge near the cap well or detonating cord tunnel to detonate the TNT booster in the center of the charge.
Detonation of the saddle charge is by the placement of a military electric or nonelectric blasting cap at the apex of the long axis.
www.textfiles.com /anarchy/INCENDIARIES/demolit.txt   (18832 words)

  
 Appendix A Impact of explosives on northern pike (Esox luciens) and aquatic life
The only study that attempted to evaluate the relationship between fish mortality and distance from a detonation cord charge was Linton et al.
PETN/feet detonation cord mid-water explosion.  Delayed mortality, approaching 100%, could occur to 86 feet from the detonation cord.
detonation cord is similar to the Kostyuchenko (1973) test charges and similar results would be expected at Lake Davis.  Northern pike eggs should experience mortality between 60% and 100%, depending on the exposure distance from the detonation cord.
www.dfg.ca.gov /lakedavis/det_cord/appendixa.html   (670 words)

  
 Use of Detonation Cord in Lake Davis to Contol Population of Northern Pike
The purpose of this project is to evaluate in the field the use of detonation cord to reduce the number of northern pike in Lake Davis, and, if detonation cord proves effective, to use it on a limited basis in the reservoir during the spring months for up to three years.
The purpose of this project is to evaluate in the field the use of detonation cord to reduce the number of northern pike in Lake Davis.
In order to evaluate the potential impact of the noise produced by the underwater detonations on the bald eagle, interviews were conducted with persons experienced with underwater use of detonation cord to determine the type and decibel (dB) range of noise to be expected (Appendix D).
www.dfg.ca.gov /lakedavis/det_cord/det_cord_final_doc.html   (15140 words)

  
 NITRAMONIA SA TECHNICAL SPECIFICATION CODE: 20
Detonating Cord P 12 is used for to propagate at the distance the explosives detonation in geological exploatations, quarries, in the mining industry and in opencast working.
The cord consists of an explosive substance core (pentrite) with a cotton thread in its center and wrapped in several textile and PVC layers.
Detonating Cord P 12 is guaranteed within a temperature range of - 15°C to + 60°C and a pressure of max.
www.verena.net /nitramonia/E10.htm   (177 words)

  
 Detonating cord - Wikipedia, the free encyclopedia
Detonating cord, also called detonation cord, detacord, det. cord, detcord, primer cord, primacord or cordtex, is a thin, flexible tube with an explosive core.
The velocity of detonation is sufficient to use it for synchronising multiple charges to detonate almost simultaneously even if the charges are placed at different distances from the point of initiation.
This is a typical "default" rating for connecting charges for blasting; lighter detonating cords may be used for "low noise blasting" and movie special effects, while heavier cords are used where the cord is employed to have some direct explosive effect.
en.wikipedia.org /wiki/Detonation_cord   (749 words)

  
 Outside Baghdad, a close encounter with a roadside bomb | csmonitor.com
But instead of targeting the Americans with bullets and grenades, Iraqi insurgents laid another surprise: A softly blinking blue cellphone hidden in a bush, wired and taped as a detonator, and linked to a long red detonation cord that disappeared into the cab of a burned-out oil tanker on the side of the road.
One of the EOD experts told of an earlier attack with one that hit a Humvee, penetrating its armor and detonating a missile inside, which in turn detonated another missile.
The detonation cord, plucked from the sand one foot at a time by the robot's arm, eventually threaded its way through a hole and into the cab.
www.csmonitor.com /2004/1007/p04s01-woiq.htm   (1186 words)

  
 PMCCS   (Site not responding. Last check: )
Detonation cord is a thin, flexible, waterproof fabric tube with a highly explosive core that can transmit a detonation wave.
Its high transmission speed, 7000-8000 m/s, makes it suitable for synchronizing multiple charges to detonate almost simultaneously, even when placed at different distances from initiation, and permits engineers to control the pattern in which charges are detonated.
Detonation cords are reliable and inexpensive methods to chain together several explosive charges.
ccsweb.pica.army.mil /3demolitions/det_cord.htm   (107 words)

  
 detonation cord | English | Dictionary & Translation by Babylon   (Site not responding. Last check: )
Detonating cord, also called detonation cord, detacord, det. cord, detcord, primer cord, primacord or cordtex, is a thin, flexible tube with an explosive core.
It is a high-speed fuse which explodes, rather than burns, and is suitable for detonating high explosives, usually pentaerythritol tetranitrate (PETN, Pentrite).
The velocity of detonation is sufficient to use it for synchronising multiple charges to detonate almost simultaneously even if the charges are placed at different distances from the point of initiation.
www.babylon.com /definition/detonation_cord   (107 words)

  
 HighX
Primary explosives are materials that detonate and are extremely sensitive to heat and shock.
Det cord may also be used for apllied entry explosives and in the hands of a skilled user, can cut trees in half.
Detonation involves a reaction propagating through the material, usually in the form of a shock wave, at speeds greater than that of sound.
members.tripod.com /Price_Of_Blood/HighX.htm   (1603 words)

  
 Pacific Scientific - References   (Site not responding. Last check: )
detonate - To be changed by exothermic chemical reaction, usually from a solid or liquid to a gas, so quickly that the advancing reaction zone is preceded by a shock wave.
detonator - A device that achieves detonation by exploding a bridge element in proximity to, but not in contact with, a secondary high explosive.
Specifically, a small explosive device similiar in appearance to a detonator, but loaded with low explosive, so that its output is primarily heat (flash).
www.psemc.com /references.asp   (2584 words)

  
 Lake Davis Detonation Cord Discharge Scheduled March 19   (Site not responding. Last check: )
Detonation cord can kill pike by creating a low-level, yet widespread underwater shockwave.
By targeting areas of the reservoir where pike are concentrated, it is hoped that the use of detonation cord will slow the growth of the pike population.
A DFG news release from 2002 further explaining detonation cord can be found at http://www.dfg.ca.gov/northernpike/detcord_newsrel.htm.
www.outdoorcentral.com /mc/pr/03/03/17e2.asp   (299 words)

  
 NON-STRETCHING EXPLOSIVE CORD (US3731626)
An explosive cord embodying high strength non-stretching means extending therealong and effective to prevent longitudinal stretching of the cord and thereby preventing malfunctioning and propagation failure due to interference with the continuity of the explosive charge.
The stretch control filaments may be incorporated in the protective shroud for the cord or applied to the cord independently of the shroud.
Additionally the invention cord may include a heat shield exteriorly of the enclosing tube for the explosive material and effective to retard the passage of heat through the latter under higher temperature ambient conditions as in deep earth bores.
www.delphion.com /details?pn10=US03731626   (188 words)

  
 Nichols used fertilizer after bombing 03/31/04   (Site not responding. Last check: )
Prosecutors allege explosive detonation cord was among the components used in the 4,000-pound ammonium-nitrate-and-fuel-oil bomb that destroyed the Oklahoma City federal building.
A worker at a Kansas rock quarry testified detonation cord and other explosives were discovered stolen Oct. 3, 1994.
Radtke said detonation cord photographed in the basement of Nichols' home three days after the bombing appeared to be the same kind that was stolen from the quarry.
www.cjonline.com /stories/033104/kan_nichols.shtml   (783 words)

  
 Patents
The invention also reduces the interference caused by the detonator and the closeness of the shots and thereby increases the performance of the individual charges, allowing smaller charges to be used to achieve the same perforation size.
The Air Freight Detonating Cord Transport Package is a system for safely transporting detonating cord that uses a container with a mounting board of insulating material with a walled path through which the cord is threaded.
The path has a series of loop regions and adjoining, parallel regions through which the parallel cord is separated with a cord separator that will sever adjoining cord in the event of a detonation to terminate further cord detonation.
www.corelab.com /owen/patents.asp   (3199 words)

  
 CIM Bulletin December 2005 / January 2006, Volume 1 No. 1091   (Site not responding. Last check: )
In the present investigation, an effort was made to quantify the damage due to micro-fractures produced by detonating explosives, establish relationships between damage and easily measurable parameters of the rock, and finally examine relationships between damage and work index, as well as damage and timing of impact.
Samples blasted with two lengths of 5.3 g/m detonation cord with 50 ms delay between the cords (Type 3).
Samples blasted with two lengths of 2.1 g/m detonation cord with 50 ms delay between the cords (Type 5).
www.cim.org /bulletin/bulletinlive/articles.cfm?Issue_ID=132&Type=6&row=7&ID=1281&Segment_ID=47   (578 words)

  
 Operation Joint Endeavour (IFOR) Pictures   (Site not responding. Last check: )
This was the second mass detonation since his unit arrived in country from Ft. Bliss, Texas in February, said Holland, 28, who was the non-commissioned officer in charge of the blast.
Detonation support was provided by Company C, 23rd Engineer Battalion.
Holland said the total explosive content of the detonation was between 1,700 and 1,800 pounds.
www.nato.int /ifor/pictures/i960719c.htm   (538 words)

  
 Anthony Pellicano weapons charges - THR
The attached cord was cut open and contained a white powder consistent with detonation cord.
The explosives were designed so that initiating the blasting cap with an electrical charge (or heat or static electricity) would initiate the detonation cord, which would detonate the cord, which was touching the plastic explosive.
The detonation of the cord would initiate a shock wave that would transfer to and set off the plastic explosive, which in turn would have blown the grenades in close proximity (even as stored in the Pelican case).
www.thehighroad.org /showthread.php?t=436   (3535 words)

  
 Frontline Resources Ltd - Explosives in Fire Fighting
The detonation cord is rolled out to a safe distance.
The cord is hollow with an explosive coating on the inside.
The newly created fire guard after detonating two lines of explosives next to each other with 15" gap in between.
www.wildfire.ca /detonation.html   (175 words)

  
 Engineers Train With New, Advanced Equipment Engineer: The Professional Bulletin for Army Engineers - Find Articles   (Site not responding. Last check: )
The LMOB contains a 250-foot, rocket-propelled detonation cord; a 30-foot spool of wire that attaches to the detonator; and a stake that secures the case to the ground.
Attached to the front end of the detonation cord are two twisted metal cables about 3 feet long.
These lightweight cables, which are attached to both sides of the rocket base, allow the rocket to successfully deploy without tearing away from the detonation cord.
www.findarticles.com /p/articles/mi_m0FDF/is_4_30/ai_78974306   (951 words)

  
 MDI Assembly Rules   (Site not responding. Last check: )
The blasting cap end of the M11 must be attached to either detonation cord or the actual explosive charge.
This is to insure simultaneous detonation and to prevent the separation of charges from the firing system.
Never allow any of the components (shock tube, det cord, or time fuse) to cross over each other, as this could cause the system to either be severed or allow the detonation shock to skip over a section and throw off the timing of the entire system.
www.personal.psu.edu /nrl108/ArmyEn/MDIsite/mdiassm.htm   (373 words)

  
 SignOnSanDiego.com > News > Nation -- Witness: Nichols spread ammonium nitrate on lawn two days after bombing
Prosecutors allege explosive detonation cord was among the components used in the 4,000-pound ammonium-nitrate-and-fuel-oil bomb that destroyed the Oklahoma City federal building.
A worker at a Kansas rock quarry testified detonation cord and other explosives were discovered stolen Oct. 3, 1994.
Radtke said detonation cord photographed in the basement of Nichols' home three days after the bombing appeared to be the same kind that was stolen from the quarry.
www.signonsandiego.com /news/nation/20040330-1855-nicholstrial.html   (583 words)

  
 Musclecarclub.com - Library - Dictionary - Automotive - 1
Bias-Ply Tires: A type of tire in which the plies or layers of cord in the tire casing are laid diagonally, criss-crossing one another at an angle of 30 to 40 degrees.
Detonation: Occurs when hot spots (caused by engine deposits) in the combustion chamber ignites the air and fuel mixture prematurely.
Limited Slip Differential: A specially designed differential that not only allows the left and right axles to spin independently, but also has the ability to distribute the power to each axle even if one is slipping due to the loss of traction.
www.musclecarclub.com /library/dictionary/dictionary-automotive-1.shtml   (4134 words)

  
 Fish and Game test underwater detonation (printable version)
Biologist Lori Powers, with the California Department of Fish and Game, holds one of the pike used in the detonation cord test on Wednesday at Lake Davis.
The California Department of Fish and Game had triggered an underwater blast to test whether detonation cord would kill the fish, a non-native species that threatens native fish.
Lake Davis is the only place in California where the northern pike is known to thrive, and officials fear that if the aggressive fish ever escape downstream, they could decimate trout and salmon fisheries across a huge swath of the state, including the Sacramento-San Joaquin Delta.
www.rgj.com /news/printstory.php?id=12918   (544 words)

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