Stage tool
AssigneePackers Plus Energy Services Inc.
InventorDaniel Jon Themig
Life of this patent
Estimating the term…
Abstract
A stage tool for wellbore annular cementing includes: a main body including a tubular wall with an outer surface and a longitudinal bore extending from a top end to a bottom end; a fluid port through the tubular wall providing fluidic access between the longitudinal bore and the outer surface; a valve for controlling flow through the fluid port between the outer surface and the inner bore; a backup sleeve to act as a secondary closure for the fluid port; and an automatic mechanism for automatically closing the backup sleeve without running in a string to move the backup sleeve.
Claims29
A method for cementing an annulus about a tubing string in a wellbore comprising:
- opening ports of a stage tool in the tubing string to create a circulation path through the stage tool from the annulus into the tubing string;
- introducing cement to the annulus to fill a selected portion of the annulus;
- ceasing cement circulation;
- and
- automatically closing a backup sleeve to close the circulation path.
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A stage tool for wellbore annular cementing, comprising:
- a main body including a tubular wall with an outer surface and a longitudinal bore extending from a top end to a bottom end;
- a fluid port through the tubular wall providing fluidic access between the longitudinal bore and the outer surface;
- a valve for controlling flow through the fluid port between the outer surface and the inner bore;
- a backup sleeve to act as a secondary closure for the fluid port;
- and
- an automatic mechanism for automatically closing the backup sleeve without running in a string to move the backup sleeve.
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Dependencies are inferred from the claim text.