US 2008/0156496 A1Published application

Methods and Devices for Treating Multiple-Interval Well Bores

AssigneeHalliburton Energy Services, Inc.

InventorLoyd East

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Abstract

Methods and devices are provided for treating multiple interval well bores. More particularly, an isolation assembly may be used to allow for zonal isolation to allow treatment of selected productive or previously producing intervals in multiple interval well bores. One example of a method for treating a multiple interval well bore includes the steps of: introducing an isolation assembly to a well bore, the isolation assembly comprising a liner, one or more sleeves and a plurality of swellable packers, wherein the sleeves and swellable packers are disposed about the liner; deploying a shifting tool inside the liner, where the sleeves are configured so as to provide open, closed and open to screen positions when actuated by the shifting tool. An open position allows for treatment of the well bore while an open to screen position allows for receiving fluid from the well bore. A closed position re-establishes zonal isolation.

Claims22

Dependent claims

A method for multi-interval fracturing completion comprising the steps of:

introducing an isolation assembly to a well bore, the isolation assembly comprising a liner, one or more sleeves, one or more screen-wrapped sleeves, and a plurality of swellable packers;
wherein the plurality of swellable packers are disposed around the liner at selected spacings;
swelling at least one of the plurality of swellable packers so as to provide zonal isolation of one or more selected intervals;
wherein the one or more screen-wrapped sleeves and the one or more sleeves are disposed around the liner at selected spacings so as to provide at least one of the one or more screen-wrapped sleeves and at least one of the one or more sleeves within at least one of the one or more selected intervals;
deploying a shifting tool inside the liner, wherein the shifting tool is adapted to adjust positioning of each of the one or more sleeves and each of the one or more screen-wrapped sleeves;
actuating the shifting tool to adjust positioning of the at least one of the one or more sleeves to an open position so as to stimulate the at least one of the one or more selected intervals by flowing fluid through one or more openings of the liner and through one or more openings in the at least one of the one or more sleeves;
actuating the shifting tool to adjust positioning of the at least one of the one or more sleeves to a closed position so as to reestablish zonal isolation of the at least one of the one or more selected intervals;
and
actuating the shifting tool to adjust positioning of the at least one of the one or more screen-wrapped sleeves to an open position so as to allow flow of production fluid from the at least one of the one or more selected intervals through one or more openings in the liner and through a plurality of openings in the at least one of the one or more screen-wrapped sleeves.

6 more elements

A method for multi-interval fracturing completion comprising the steps of:

introducing an isolation assembly to a well bore, the isolation assembly comprising a liner, one or more sleeves, and a plurality of swellable packers;
wherein the plurality of swellable packers are disposed around the liner at selected spacings;
wherein the one or more sleeves are configured so as to provide a closed position, an open position and an open to screen position;
deploying a shifting tool inside the liner, wherein the shifting tool is adapted to adjust positioning of each of the one or more sleeves;
swelling at least one of the plurality of swellable packers so as to provide zonal isolation of one or more selected intervals;
wherein the one or more sleeves are disposed around the liner at selected spacings so as to provide at least one of the one or more sleeves within at least one of the one or more selected intervals;
actuating the shifting tool to adjust positioning of the at least one of the one or more sleeves to an open position;
pumping fluid through one or more openings in the liner and through one or more openings of the at least one of the one or more sleeves within the at least one of the one or more selected intervals so as to stimulate the at least one of the one or more selected intervals;
and
actuating the shifting tool to adjust positioning of the at least one of the one or more sleeves to an open to screen position so as to allow flow of production fluid from the at least one of the one or more selected intervals through one or more openings in the liner and through one or more openings in the at least one of the one or more sleeves.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/746,656Filed 10 May 2007
Priority: 9 Jun 2006
Published: 3 Jul 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

E21B 43/14
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells: obtaining from a…
E21B 33/1208
Packers; Plugs: characterised by the construction of the sealing or packing means
E21B 33/124
Packers; Plugs: units with longitudinally-spaced plugs for isolating the intermediate space
E21B 34/12
In wells: operated by movement of casings or tubings

Family

Application11/450,654Continuation in part · filed 9 Jun 2006
Application11/746,656Continuation in part
US 2007/0284109 A1Published application
US 7,478,676 B2Related patent
US 7,575,062 B2Related patent
US 2008/0156496 A1This patent

From the US filing history. Foreign family members aren’t listed.