Selective dual gravel pack
AssigneeTexaco Inc.
InventorsKurt P. Primeaux, John M. Guidry
Life of this patent
Estimating the term…
Abstract
A method and apparatus allowing sequential production from layers in a well uses a pair of vertically spaced production assemblies formed by packer seal assembly above a respective screen assembly. The production assemblies are spaced on a production pipe string to be substantially aligned with zones to be produced. Isolation tubing allows the lower zone to be produced to depletion when the tubing is then plugged, perforated and the upper zone produced.
Claims5
A method for sequentially producing vertically spaced hydrocarbon containing zones penetrated by a single well bore comprising:
- providing upper and lower production assemblies;
- providing isolation tubing extending through said upper production assembly;
- setting said upper and lower production assemblies in a well substantially aligned with upper and lower zones to be produced;
- producing the lower zone to depletion;
- setting a plug in said isolation tubing between said zones;
- perforating said tubing in said upper zone;
- and
- producing said upper zone to depletion.
An production pipe string for sequentially producing vertically spaced hydrocarbon containing zones penetrated by a single well bore comprising:
- an upper production assembly;
- a lower production assembly;
- and
- isolation tubing extending through said upper production assembly to said lower production assembly whereby the zone opposite the lower production assembly is produced to depletion and sealed off, said isolation tubing is then perforated within the upper production assembly and the second zone produced to depletion through said upper production assembly. isolation tubing is then perforated and the second zone produced to depletion through said upper production assembly.
Dependencies are inferred from the claim text.