Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent
1986-08-07
1988-03-22
Leppink, James A.
Wells
Means for perforating, weakening, bending or separating pipe...
With disparate below ground feature
166142, 166321, E21B 43116, E21B 3410
Patent
active
047322110
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.
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patent: 4512406 (1985-04-01), Vann et al.
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George Kevin R.
Haugen David M.
Luke Robert R.
Wesson David S.
Dang Hoang C.
Duzan James R.
Halliburton Company
Leppink James A.
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