Float equipment assemblies and methods to isolate downhole strings
AssigneeHalliburton Energy Services, Inc.
InventorsRyan Michael Novelen, Caleb Thomas Warren, Thomas Owen Roane, Thomas J Frosell
Life of this patent
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Abstract
A float equipment assembly includes an inner string that provides a fluid flow path through the float equipment assembly. The float equipment assembly also includes an opening through which a fluid flowing through the inner string exits the float equipment assembly. The float equipment assembly further includes a moveable member, which when repositioned, isolates the inner string. The float equipment assembly further includes a dissolvable material that initially prevents repositioning of the moveable member, where the moveable member is repositioned after a threshold portion of the dissolvable material has dissolved.
Claims7
A float equipment assembly, comprising:
- an inner string that provides a fluid flow path through the float equipment assembly;
- a chamber having an opening through which a fluid flowing through the inner string flows through the chamber and exits the float equipment assembly via the opening;
- a moveable member which, when repositioned, isolates the inner string;
- and
- a dissolvable material that initially prevents repositioning of the moveable member,
- wherein the moveable member is at least partially repositioned within the chamber after a threshold portion of the dissolvable material has dissolved, and
- wherein the moveable member comprises of a piston.
A method to isolate a downhole string, the method comprising:
- deploying a downhole string coupled to a float equipment assembly, the float equipment assembly comprising:
- an inner string that provides a fluid flow path from the downhole string through the float equipment assembly;
- a chamber having an opening through which a fluid flowing through the inner string flows through the chamber and exits the float equipment assembly via the opening;
- a moveable member which, when repositioned, isolates the inner string;
- and
- a dissolvable material that initially prevents repositioning of the moveable member;
- flowing a fluid down the downhole string to dissolve a threshold portion of the dissolvable material;
- and
- after the threshold portion of the dissolvable material has dissolved, partially repositioning the moveable member into the chamber to isolate the inner string, and
- wherein the moveable member comprises a piston.
A downhole completion assembly comprising:
- a completion string;
- and
- a float equipment assembly coupled to the completion string, the float equipment assembly comprising:
- an inner string that provides a fluid flow path from the completion string through the float equipment assembly;
- a chamber having an opening through which a fluid flowing through the inner string flows through the chamber and exits the float equipment assembly via the opening;
- a moveable member which, when repositioned, isolates the inner string;
- and
- a dissolvable material that initially prevents repositioning of the moveable member,
- wherein the moveable member is repositioned after a threshold portion of the dissolvable material has dissolved, and
- wherein the moveable member comprises a piston.
Dependencies are inferred from the claim text.