Method and apparatus for hydraulically firing a perforating gun

Details Method and apparatus for hydraulically firing a perforating gun Method and apparatus for hydraulically firing a perforating gun

1989-01-23

1990-04-17

Neuder, William P.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

166 55, 166133, 166188, 175 452, E21B 3312, E21B 43116

Patent

active

049171879

ABSTRACT:
An improved packer is provided for sealingly engaging a well casing above a pressure responsive device within a petroleum recovery well. A sleeve-like packer body interior of the packer sealing elements is provided for structurally interconnecting lower and upper sections of a tubing string, and retains a large internal diameter for passing fluids or various downhole tools through the tubing string and to the bore of the packer. A plurality of tubular passageways are provided within the packer each positioned radially between the packer body and the packer sealing elements, and each extending axially from above to below the packer sealing elements. The passageways allow for communications of a fluid pressure signal from the annulus above the set packer to the firing head of a hydraulically actuatable device below the packer. The tubular passageways may be positioned within a second flow passageway open to annulus pressure both above and below the packer sealing elements when the packer is in its unset position, with the second passageway becoming automatically closed at one end when the packer is set in the well bore.

REFERENCES:
patent: 2894587 (1959-07-01), McCulloch
patent: 4540047 (1985-09-01), Akkerman
patent: 4817718 (1989-04-01), Nelson et al.

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