Annulus pressure operated vent assembly

Details Annulus pressure operated vent assembly Annulus pressure operated vent assembly

1988-01-20

1989-01-31

Dang, Hoang C.

Wells

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

With disparate below ground feature

166142, 166321, E21B 43116, E21B 3410

Patent

active

048009580

ABSTRACT:
A vent subassembly includes a vent body having an opening which is covered or uncovered dependent upon the location of a vent sleeve relative to the vent body. The vent subassembly can be connected below a packer, and the vent sleeve can be connected to a perforator so that movement of the vent sleeve is concurrently communicated to the perforator, such as for initiating the firing of the perforator. The vent sleeve is moved by an actuator subassembly, which is to be connected above the packer if the vent and actuator subassemblies are used with a packer. The actuator subassembly has a piston housing, a piston slidably disposed in the piston housing, and a connector string extending from the piston to the vent sleeve. The piston is responsive to a differential pressure existing between the annulus outside the actuator subassembly and an interior pressure within the actuator subassembly.

REFERENCES:
patent: 2984303 (1961-05-01), Baker
patent: 3970147 (1976-07-01), Jessup et al.
patent: 4274486 (1981-06-01), Fredd
patent: 4452313 (1984-06-01), McMahan
patent: 4512406 (1985-04-01), Vann et al.
patent: 4515217 (1985-05-01), Stout
patent: 4564076 (1986-01-01), Vann et al.
patent: 4655298 (1987-04-01), George et al.
patent: 4732211 (1988-03-01), Haugen et al.

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