Isolation of well section

Patent metadata

Field	Value
Publication number	US-11965392-B2
Application number	US-202117341221-A
Country	US
Kind code	B2
Filing date	Jun 7, 2021
Priority date	Jun 16, 2020
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

A system can include a bottom hole assembly, a wireline and a capillary tube connected to the bottom hole assembly, and a dual pack-off assembly that seals about the wireline and the capillary tube. A method can include connecting a bottom hole assembly to a wireline and a capillary tube, deploying the bottom hole assembly into a wellbore, and increasing pressure in the capillary tube, thereby setting a packer of the bottom hole assembly. A dual pack-off assembly can include a lubricator connector, pack-offs configured to seal about a capillary tube and a wireline, and pipes connected between the respective pack-offs and the lubricator connector.

First claim

What is claimed is:

1. A system for use with a subterranean well, the system comprising:
a bottom hole assembly;
a wireline connected to the bottom hole assembly;
a capillary tube connected to the bottom hole assembly, in which the bottomhole assembly and the capillary tube are conveyed in the well by the wireline; and
a dual pack-off assembly that seals about each of the wireline and the capillary tube while both the wireline and the capillary tube are deployed in the well,
in which the dual pack-off assembly includes first and second blowout preventers, and first and second pack-offs, the capillary tube extending through the first blowout preventer and the first pack-off, and the wireline extending through the second blowout preventer and the second pack-off.

2. The system of claim 1 , in which the bottom hole assembly includes a packer that is settable in the well in response to a first pressure applied to the capillary tube.

3. The system of claim 2 , in which the packer comprises an inflatable packer.

4. The system of claim 2 , in which the bottom hole assembly includes a pressure actuated disconnect tool that is releasable in response to a second pressure applied to the capillary tube.

5. The system of claim 4 , in which the second pressure is greater than the first pressure.

6. The system of claim 1 , in which a lubricator is connected longitudinally between the dual pack-off assembly and a wellhead of the well.

7. The system of claim 6 , in which the bottom hole assembly is receivable in the lubricator while the capillary tube and the wireline extend through the dual pack-off assembly.

8. The system of claim 1 , in which the capillary tube is connected to a pressure actuated disconnect tool of the bottom hole assembly, and pressure in the capillary tube is transmittable to a packer of the bottom hole assembly via the pressure actuated disconnect tool.

9. The system of claim 1 , in which the wireline is connected to a wireline connector of the bottom hole assembly, and the capillary tube is connected to the bottom hole assembly at a position longitudinally between the wireline connector and a packer of the bottom hole assembly.

10. A method, comprising:
connecting a bottom hole assembly to both of a wireline and a capillary tube;
deploying the bottom hole assembly into a wellbore while the bottom hole assembly is connected to the wireline and the capillary tube, in which the wireline extends through a first pack-off, in which the capillary tube extends through a second pack-off, and in which the bottomhole assembly and the capillary tube are conveyed in the wellbore by the wireline; and
increasing pressure in the capillary tube, thereby setting a packer of the bottom hole assembly in the wellbore.

11. The method of claim 10 , further comprising further increasing the pressure in the capillary tube, thereby disconnecting a pressure actuated disconnect tool of the bottom hole assembly.

12. The method of claim 11 , further comprising retrieving the bottom hole assembly above the disconnect tool from the wellbore while the packer remains set in the wellbore.

13. The method of claim 10 , in which the setting comprises inflating the packer.

14. The method of claim 10 , in which the increasing pressure in the capillary tube comprises transmitting the pressure to the packer via a pressure actuated disconnect tool of the bottom hole assembly.

15. The method of claim 10 , in which the first and second pack-offs are part of a dual pack-off assembly.

16. The method of claim 15 , in which the capillary tube extends through a first blowout preventer and the first pack-off of the dual pack-off assembly, and in which the wireline extends through a second blowout preventer and the second pack-off of the dual pack-off assembly.

17. The method of claim 15 , in which the deploying comprises receiving the bottom hole assembly in a lubricator connected longitudinally between the dual pack-off assembly and a wellhead.

18. The method of claim 15 , in which the connecting comprises connecting the wireline to a wireline connector of the bottom hole assembly, and connecting the capillary tube to the bottom hole assembly at a location longitudinally between the wireline connector and the packer of the bottom hole assembly.

19. The method of claim 18 , in which a pressure actuated disconnect tool is connected in the bottom hole assembly at the location longitudinally between the wireline connector and the packer.

20. A dual pack-off assembly for use with a subterranean well, the dual pack-off assembly comprising:
a lubricator connector;
a first pack-off configured to seal about a capillary tube;
a second pack-off configured to seal about a wireline;
a first blowout preventer connected between the first pack-off and the lubricator connector; and
a second blowout preventer connected between the second pack-off and the lubricator connector.

21. The dual pack-off assembly of claim 20 , in which the lubricator connector comprises a flange.

22. The dual pack-off assembly of claim 20 , further comprising a first pipe connected between the first pack-off and the lubricator connector.

23. The dual pack-off assembly of claim 20 , further comprising a second pipe connected between the second pack-off and the lubricator connector.

Assignees

• Thru Tubing Solutions Inc

Inventors

• Ferguson Andrew M
• Britton Mark S

Classifications

• E21B33/1285 Primary

  by fluid pressure · CPC title

• E21B23/06 Primary

  for setting packers · CPC title

• E21B34/10

  operated by control fluid supplied from outside the borehole · CPC title

• E21B47/06

  Measuring temperature or pressure · CPC title