Packaging system for detonating cords for X-ray examination and safe shipping
View Patent ↗The invention relates to a packaging for a detonation cord ( 1 ) that is used especially for igniting shaped charge perforators in perforation guns utilized in the oil and natural gas industry. According to the invention, the detonation cord ( 1 ) is wound on one plane as a flat coil. Also disclosed is a method for examining whether a detonation cord ( 1 ) has faulty points. Said method is characterized in that the detonation cord ( 1 ) is subjected to an x-ray examination in the packaging before being delivered.
1. A method of creating and examining a packaging of a detonating cord, comprising:
winding a detonating cord in a single plane as a flat spiral, wherein a space separating at least two individual laps of the flat spiral is produced by a spacing cord extending in parallel to the detonating cord, and wherein the thickness of the spacing cord corresponds to the space;
subjecting the detonating cord to X-ray examination in its packaging prior to shipping, without unwinding the detonating cord, thereby revealing when the detonating cord contains a defect.
2. The method according to claim 1 , further comprising: shipping the packaging containing detonating cord when a result of the X-ray examination does not reveal any defect which would lead to failure of the detonating cord.
3. The method according to claim 2 , further comprising:
activating the shipped detonating cord to ignite a shaped charge perforator in a perforating gun.
4. The method according to claim 3 , wherein the shaped charge perforator is ignited in the perforating gun during the course of perforating at least one of an oil well and a gas well.
5. The method according to claim 1 , wherein the detonating cord is wound on a base plate.
6. The method according to claim 5 , wherein the base plate comprises at least one of paperboard, wood and polystyrene.
7. The method according to claim 1 , wherein a last lap of the flat spiral is passed perpendicularly over the rest of the flat spiral.
8. The method according to claim 1 , wherein the detonating cord is sealed in a vacuum bag; and wherein the vacuum bag is attached to a base plate.