Fluid pressure activated firing head for providing clean fluid

Details Fluid pressure activated firing head for providing clean fluid Fluid pressure activated firing head for providing clean fluid

1984-09-10

1987-05-26

Leppink, James A.

Wells

Means for perforating, weakening, bending or separating pipe...

With disparate below ground feature

175 452, 175 454, E21B 43117

Patent

active

046677356

ABSTRACT:
A fluid pressure activated firing head for a perforating gun disposed in a subterranean well by a packer is provided with a column of clean fluid overlying and filling the bore of the firing head but communicating with the casing annulus above the set packer. A fluid passage is provided at the top of the conduit extending the clean fluid column through the packer, and the downwardly facing leg of the annular fluid passage is provided with a pressure transmitting seal to permit the entire fluid passage to be filled with clean fluid of a lighter density than the casing annulus fluids, thus insuring that casing annulus fluid can never enter the interior of the pressure activated firing head.

REFERENCES:
patent: 2096904 (1937-10-01), Layne et al.
patent: 2760408 (1956-08-01), Taylor
patent: 3189094 (1965-06-01), Hyde
patent: 3726343 (1973-04-01), Davis, Jr.
patent: 4484632 (1984-11-01), Vann
patent: 4498541 (1985-02-01), Brieger et al.
patent: 4509604 (1985-04-01), Upchurch

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