发明名称 |
High temperature and pressure igniter for downhole percussion coring guns |
摘要 |
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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申请公布号 |
US5031536(A) |
申请公布日期 |
1991.07.16 |
申请号 |
US19900574727 |
申请日期 |
1990.08.30 |
申请人 |
HALLIBURTON LOGGING SERVICES, INC. |
发明人 |
BARKER, JAMES M.;TOMEK, MARTIN L. |
分类号 |
E21B49/04 |
主分类号 |
E21B49/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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