Wellbore isolation device

Patent metadata

Field	Value
Publication number	US-11530594-B2
Application number	US-201916651812-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	May 17, 2019
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A wellbore isolation assembly has an outer housing having an inner bore having a treatment port formed therein, and a floating inner mandrel disposed within the inner bore. The floating inner mandrel can have an inner bore formed therethrough with a fluid port formed therein. One or more fluid chambers, disposed in an annulus formed between the outer housing and the floating inner mandrel, having a working fluid operably disposed therein and one or more inflatable elements operable to receive the working fluid therein. A plunger disposed in the annulus and coupled with the floating inner mandrel and operable to urge the working fluid from the one or more fluid chambers to the one or more inflatable elements. The floating inner mandrel operable to transition between a first position and a second position and the treatment port and the fluid port substantially aligned in the second position.

First claim

What is claimed is:

1. A well bore isolation assembly, comprising:
an outer housing having an inner bore formed therethrough, the outer housing having a treatment port formed therein providing fluidic communication between the inner bore and an exterior;
a floating inner mandrel disposed within the inner bore of the outer housing, the floating inner mandrel having an inner bore formed therethrough, the floating inner mandrel having a fluid port formed therein providing fluidic communication between the inner bore and an annulus formed between the floating inner mandrel and the outer housing;
one or more fluid chambers disposed in the annulus, the one or more fluid chambers having a working fluid operably disposed therein;
one or more inflatable elements operable to receive the working fluid therein and are configured to be retracted and repositioned within the well bore;
a plunger disposed in the annulus and coupled with the floating inner mandrel, wherein the floating inner mandrel is operable to transition between a first position and a second position, the treatment port and the fluid port substantially aligned in the second position, wherein the plunger urges the working fluid from the one or more fluid chambers to the one or more inflatable elements.

2. The well bore isolation assembly of claim 1 , wherein the one or more inflatable elements fills with working fluid in the second position, and is substantially devoid of working fluid in the first position.

3. The well bore isolation assembly of claim 1 , wherein an actuation force transitions the floating inner mandrel from the first position to the second position.

4. The well bore isolation assembly of claim 3 , wherein the actuation force is a fluid flow through the inner bore of the floating inner mandrel.

5. The well bore isolation assembly of claim 1 , wherein the floating inner mandrel has an aperture formed at one distal end.

6. The well bore isolation assembly of claim 5 , wherein the aperture is operable to receive a ball and/or dart, thereby restricting fluid flow through the inner bore of the floating inner mandrel.

7. The well bore isolation assembly of claim 1 , further comprising a biasing element urging the floating inner mandrel to the first position.

8. A well bore isolation system comprising:
a downhole tool string having a wellbore isolation system operably disposed within a well bore, the well bore isolation system comprising:
an outer housing having an inner bore formed therethrough, the outer housing having a treatment port formed therein providing fluidic communication between the inner bore and an exterior;
a floating inner mandrel disposed within the inner bore of the outer housing, the floating inner mandrel having an inner bore formed therethrough, the floating inner mandrel having a fluid port formed therein providing fluidic communication between the inner bore and an annulus formed between the floating inner mandrel and the outer housing;
one or more fluid chambers disposed in the annulus, the one or more fluid chambers having a working fluid operably disposed therein;
one or more inflatable elements operable to receive the working fluid therein and are configured to be retracted and repositioned within the well bore;
a plunger disposed in the annulus and coupled with the floating inner mandrel, wherein the floating inner mandrel is operable to transition between a first position and a second position, the treatment port and the fluid port substantially aligned in the second position, wherein the plunger urges the working fluid from the one or more fluid chambers to the one or more inflatable elements.

9. The well bore isolation system of claim 8 , wherein the one or more inflatable elements fills with working fluid in the second position, and is substantially devoid of working fluid in the first position.

10. The well_bore isolation system of claim 8 , wherein an actuation force transitions the floating inner mandrel from the first position to the second position.

11. The well_bore isolation system of claim 10 , wherein the actuation force is a fluid flow through the inner bore of the floating inner mandrel.

12. The well_bore isolation system of claim 8 , wherein the floating inner mandrel has an aperture formed at one distal end.

13. The well_bore isolation system of claim 12 , wherein the aperture is operable to receive a ball and/or dart, thereby restricting fluid flow through the inner bore of the floating inner mandrel.

14. The well_bore isolation system of claim 8 , further comprising a biasing element urging the floating inner mandrel to the first position.

15. A well bore isolation method comprising:
disposing a downhole string within a wellbore formed in a subterranean formation, the downhole string having a wellbore isolation assembly therein, the well bore isolation assembly having an outer housing and a floating inner mandrel;
actuating the wellbore isolation assembly to transition the floating inner mandrel from a first position to a second position;
transferring a working fluid from one or more fluid chambers disposed in an annulus formed between the outer housing and the floating inner mandrel to one or more inflatable elements;
inflating the one or more inflatable elements by receiving the working fluid therein until substantial engagement between the one or more inflatable elements and the wellbore formed in the subterranean formation, wherein the one or more inflatable elements are configured to be retracted and repositioned within the well bore, wherein a plunger arranged in the annulus and coupled with the floating inner mandrel urges the working fluid from the one or more fluid chambers to the one or more inflatable elements.

16. The well bore isolation method of claim 15 , wherein the one or more inflatable elements fills with working fluid in the second position, and is substantially devoid of working fluid in the first position.

17. The well bore isolation method of claim 15 , wherein an actuation force transitions the floating inner mandrel from the first position to the second position.

18. The well bore isolation method of claim 17 , wherein the actuation force is a fluid flow through the inner bore of the floating inner mandrel.

19. The well bore isolation method of claim 15 , wherein the floating inner mandrel has an aperture formed at one distal end.

20. The well bore isolation method of claim 19 wherein the aperture is operable to receive a ball and/or dart, thereby restricting fluid flow through the inner bore of the floating inner mandrel.

Assignees

• Halliburton Energy Services Inc

Inventors

• Quero Philippe
• Bivens Eric

Classifications

• E21B33/124 Primary

  Units with longitudinally-spaced plugs for isolating the intermediate space · CPC title

• E21B33/128

  with a member expanded radially by axial pressure (E21B33/122, E21B33/124 take precedence) · CPC title