发明名称 |
FIRING SYSTEM FOR TUBING CONVEYED PERFORATING GUN |
摘要 |
<p>A drop bar firing system is provided with a drop bar retracting means that insures that the lower end of the drop bar cannot come into contact with the firing head after a misfire, as the drop bar is fished or the tubing string removed. A safe arm mechanism requires the pressure in the well as the perforating gun is lowered into the well to arm the tubing conveyed perforating firing means. A safe position is automatically developed by the safe arm as the perforating gun is brought out of the well if a live gun must be retrieved. A specially shaped device to fire the tubing conveyed perforating detonator includes a probe of small diameter requiring a heavy impact on center.</p> |
申请公布号 |
CA1233407(A) |
申请公布日期 |
1988.03.01 |
申请号 |
CA19850493951 |
申请日期 |
1985.10.28 |
申请人 |
SCHLUMBERGER CANADA LIMITED |
发明人 |
BAGLEY, JAMES T.;SIMON, MAURICE L. |
分类号 |
E21B43/116;E21B43/1185;(IPC1-7):E21B43/11 |
主分类号 |
E21B43/116 |
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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