High temperature and pressure igniter for downhole percussion coring guns
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 16, 1991
Grant Date -
N/A
app pub date -
Aug 30, 1990
filing date -
Aug 30, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An igniter is set forth in the present disclosure for use with a coring gun assembly. A bullet equipped with a bottom and having an O-ring thereabout is positioned in a chamber at one end thereof for firing to take a core sample. At the opposite end, an igniter is positioned in the chamber resting primarily on a shoulder aligning an elongate cylindrical shell within the chamber and having an external O-ring for sealing purposes. An elongate electrically insulated conductive firing pin extends through said shell so that an external circuit can be connected thereto to create a firing pulse. The current flows through the pin and through a bridgewire disc positioned at the end of the pin which in turn ignites a prepackaged cylindrical explosive charge to fire the bullet.
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