Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1994-07-29
1995-10-10
Neuder, William P.
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166386, 166192, E21B 4300
Patent
active
054563194
ABSTRACT:
Perforations and cracks in wellbore liners or casings may be temporarily or permanently covered by a radially-expansible, coiled sleeve member formed by a sheet of elastically-deflectable material such as stainless steel which is coiled and placed in a cylinder which may be conveyed into a well to a working position for deployment of the sleeve to expand into engagement with the casing wall to block the perforations or cracks. The cylinder includes a sleeve ejecting piston which may be urged to rapidly eject the sleeve from the cylinder by pressure fluid conveyed to the cylinder by coilable tubing or by a gas-generating charge material electrically connected to an E-line which also may be used to deploy the cylinder into its working position in the well.
REFERENCES:
patent: 4972906 (1990-11-01), McDaniel
Abel James C.
Blount Curtis G.
Bolkovatz Michael J.
Ferguson Keith R.
Schmidt Joseph H.
Atlantic Richfield Company
Martin Michael E.
Neuder William P.
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