Firing system for tubing conveyed perforating gun

Details Firing system for tubing conveyed perforating gun Firing system for tubing conveyed perforating gun

1984-10-29

1986-01-28

Leppink, James A.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

Firing control mechanically actuated in bore

166297, 166 551, 166318, E21B 4311

Patent

active

045665443

ABSTRACT:
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.

REFERENCES:
patent: 3189094 (1965-06-01), Hyde
patent: 3706344 (1972-12-01), Vann
patent: 4007798 (1977-02-01), Gazda
patent: 4158334 (1979-06-01), Osburn
patent: 4299287 (1981-11-01), Vann

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