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1. (WO2019060983) ACTUABLE DOWNHOLE TOOLS FOR ATTACHMENT TO TUBULAR STRINGS
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CLAIMS

What is claimed is:

1 . A downhole tool for attachment to a tubular string and configured to receive a forcing tool, the downhole tool comprising:

a tubular mandrel configured for attachment to the pipe string;

a tubular adapter coupled to the mandrel and extending along an axis therefrom;

a movable sleeve coupled to the tubular adapter and including an outer diameter DT; and

a retainer comprising:

an first annular portion coupled to the tubular adapter so as to restrict the first annular portion from moving relative to the tubular adapter in an axial direction; and

a bridge portion coupling the first annular portion to the movable sleeve, the coupling restricting the movable sleeve from moving relative to the tubular adapter in the axial direction;

wherein the retainer is configured such that decoupling at least a part of the bridge portion from the first annular portion allows the movable sleeve to be moved relative to the tubular adapter in the axial direction.

2. The downhole tool of claim 1 , wherein the retainer is disposed within the tubular adapter and wherein the retainer further comprises:

a second annular portion; and

an annular void between the first annular portion and the second annular portion;

wherein the second annular portion is fixed to the movable sleeve such that downward movement of the second annular portion causes the movable sleeve to move downward;

wherein the bridge portion extends between the first annular portion and the second annular portion and comprises a through-passage of diameter D1 and a thin walled segment having an outer diameter D2 that is greater than D1 and less than DT, the thin walled segment being disposed at an axial location adjacent to the void; and

wherein the bridge portion is millable to dislocate part of the bridge portion from the first annular portion to allow the movable sleeve to move relative to the tubular adapter in the axial direction.

3. The downhole tool of claim 1 , further comprising:

an inward-facing annular recess on an inner surface of the tubular adapter; and

a retaining ring disposed radially between the tubular adapter and the movable sleeve;

wherein the movable sleeve includes an outward facing annular recess having a first position axially displaced from the inward-facing annular recess and a second position axially aligned with the inward-facing annular recess; and

wherein when the retaining ring is configures such that when the outward facing annular recess is in the second position, the retaining ring is disposed in both the inward-facing annular recess and the outward facing annular recess to restrict the axial movement of the movable sleeve relative to the tubular adapter.

4. The downhole tool of claim 1 , wherein the tubular adapter comprises:

an adapter housing; and

a guide sleeve disposed within the adapter housing, the guide sleeve comprising a plurality of slots that extend axially;

wherein the movable sleeve is coupled within the guide sleeve;

wherein a plurality of guide pins extend radially from the movable sleeve and into the plurality of slots to allow axial movement of the movable sleeve with respect to the guide sleeve and to restrict the rotational movement of the movable sleeve with respect to the guide sleeve.

5. The downhole tool of claim 1 , wherein the mandrel comprises diameter of D4, and

wherein D2 is less than D4.

6. The downhole tool of claim 1 , wherein the movable sleeve is disposed within the tubular adapter, extends axially away from the tubular mandrel, and extends beyond the tubular adapter.

7. The downhole tool of claim 1 , further comprising:

a screen housing extending axially from the tubular adapter and having a first plurality of perforations; and

a screen surrounding the screen housing;

wherein the movable sleeve is a tubular valve member having a second plurality of perforations, and extending axially from within the tubular adapter to a location within the screen housing; and

wherein the movable sleeve is axially movable with respect to the tubular adapter and the screen housing from a first position in which the first and second plurality of perforations are not aligned to a second position in which the first and second plurality of perforations are axially aligned.

8. The downhole tool of claim 1 , further comprising:

a perforated housing extending axially from the tubular adapter and having a first plurality of perforations; and

wherein the movable sleeve is a tubular valve member having a second plurality of perforations, and extending axially from within the tubular adapter to a location within the perforated housing; and

wherein the movable sleeve is axially movable with respect to the tubular adapter and the perforated housing from a first position in which the first and second plurality of perforations are not aligned to a second position in which the first and second plurality of perforations are axially aligned.

9. The downhole tool of claim 1 , wherein the bridge portion comprises a shear pin extending radially from a first end disposed in the first annular portion of the retainer to a second end disposed in the movable sleeve; and

wherein the shear pin is configured to fracture such that the second end of the shear pin decouples from the first annular portion, allowing the

movable sleeve to move relative to the tubular adapter in the axial direction.

10. The downhole tool of claim 9, wherein the first annular portion of the retainer is disposed in the recess in the tubular adapter.

1 1. A downhole tool for attachment to a tubular string and configured to receive a milling tool that includes a cutting diameter DM, the downhole tool comprising:

a tubular mandrel configured for attachment to the pipe string;

an adapter housing coupled to the mandrel;

a guide sleeve disposed within the adapter housing;

a movable sleeve disposed within the guide sleeve and configured for sliding movement within the guide sleeve;

a retainer disposed within the guide sleeve at an axial location that is uphole of the movable sleeve, the retainer comprising:

an upper annular portion and a lower annular portion, wherein the upper annular portion is fixed to the guide sleeve to restrict relative movement of the upper annular portion relative to the guide sleeve, and wherein the lower annular portion is configured such that downward movement of the lower annular portion causes the movable sleeve to move downward within the guide sleeve;

an annular void between the upper annular portion and the lower annular portion; and

a bridge portion extending between the upper annular portion and the lower annular portion and comprising a through-passage of diameter D1 , wherein the bridge portion defines a thin walled segment of the retainer having an outer diameter D2 that is greater than D1 , the thin walled segment being disposed at an axial location adjacent to the void.

12. The downhole tool of claim 1 1 , further comprising:

a screen housing extending axially from the adapter housing and having a first plurality of perforations; and

a screen surrounding the screen housing;

wherein the movable sleeve extends axially beyond the guide sleeve to a location within the screen housing and includes a second plurality of perforations; and

wherein the movable sleeve is axially movable with respect to the guide sleeve and the screen housing from a first position in which the first and second plurality of perforations are not aligned to a second position in which the first and second plurality of perforations are aligned to allow fluid flow through the first and second plurality of perforations.

13. The downhole tool of claim 1 1 , further comprising:

a perforated housing extending axially from the adapter housing and having a first plurality of perforations; and

wherein the movable sleeve extends axially beyond the guide sleeve to a location within the perforated housing and includes a second plurality of perforations; and

wherein the movable sleeve is axially movable with respect to the guide sleeve and the perforated housing from a first position in which the first and second plurality of perforations are not aligned to a second position in which the first and second plurality of perforations are aligned to allow fluid flow through the first and second plurality of perforations.

14. The downhole tool of claim 1 1 , wherein the void extends radially from a first end that is adjacent the outer diameter of the thin walled segment to a second end distal the thin walled segment, and wherein the width of the void measured axially is non-uniform.

15. The downhole tool of claim 14, wherein the width of the void is greater at the first end than at the second end.

16. The downhole tool of claim 1 1 , wherein D2 is less than DM.

17. The downhole tool of claim 1 1 , wherein the upper annular portion comprises an outer diameter of D3, and wherein D3 is greater than DM.

18. The downhole tool of claim 11 , wherein the bridge spans the annular void and includes a first end on one side of the void that is coupled to the lower annular member and a second end on the opposite side of the void that is coupled to the upper annual member.

19. The downhole tool of claim 1 1 , wherein the bridge portion comprises a first material and the upper annular portion comprises a second material, wherein the first material is different than the second

20. The downhole tool of claim 1 1 , wherein the lower annular portion of the retainer engages an end of the movable sleeve to move with the movable sleeve.

21. The downhole tool of claim 20, wherein the movable sleeve is perforated.

22. The downhole tool of claim 1 1 , wherein the upper annular portion of the retainer comprises a beveled surface at its uppermost end.

23. The downhole tool of claim 22, wherein the upper annular portion of the retainer comprises a beveled surface adjacent the void.

24. A method for actuating a downhole tool extending along an axis, the method comprising:

positioning the downhole tool in a borehole, wherein the downhole tool comprises a housing and a movable sleeve coupled to the housing by a retainer;

inserting a forcing tool into the downhole tool; and

decoupling a first part of the retainer from a second part of the retainer using the forcing tool; and

moving the movable sleeve axially relative to the housing by moving the forcing tool axially.

25. The method of claim 24, wherein the movable sleeve is held at a fixed axial position relative to the housing by an annular retainer prior to decoupling the first part of the retainer from the second part of the retainer;

wherein the forcing tool is a rotatable milling tool; and

wherein decoupling the first part of the retainer from the second part of the retainer includes cutting a portion of the annular retainer using the milling tool to allow sleeve to slide relative to the housing.

26. The method of claim 25, further comprising:

removing the forcing tool from the borehole after moving the movable sleeve; wherein moving the movable sleeve includes pushing against the movable sleeve using the milling tool.

27. The method of claim 24, wherein the movable sleeve is held at a fixed axial position relative to the housing by an annular retainer prior to decoupling the first part of the retainer from the second part of the retainer;

wherein the forcing tool is a plug; and

wherein decoupling the first part of the retainer from the second part of the retainer includes setting the plug in a portion of the movable sleeve or the annular retainer, and applying a force on the plug to push the plug and the sleeve axially downward.

28. The method of claim 24, wherein the movable sleeve is coupled to the housing by at least one shear pin;

wherein decoupling a first part of the retainer from a second part of the retainer includes pushing the movable sleeve using the forcing tool and severing the shear pin.

29. The method of claim 24, wherein the housing includes a first plurality of perforations, and wherein the movable sleeve is a tubular valve member axially movable with respect to the housing and having second plurality of perforations; and wherein moving the movable sleeve includes sliding the movable sleeve from a first position in which the first and second plurality of perforations are not arranged for fluid communication to a second position in which the first and second plurality of perforations are arranged for fluid communication therethrough.