دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an explosive method utilizing Primacord. which is an instantaneous textilecovered fuse with a core of very high explosive. It is used to create an explosive jar inside stuck drill pipe or tubing so that the pipe may be backed off at the joint immediately above where it is stuck.

n: An explosive line which ,when detonated ,imparts concussion to pipe causing it to unscrew or back-off.Also called Prima-Cord.

one to four strands of explosive detonating cord suspended by wireline in a well and exploded to “rattle” the pipe and drop scale and debris from the sides of the pipe. Used frequently in back-off operations (unscrewing a pipe joint downhole).

n: see string shot.