Stage collar and related methods for operation
AssigneeForum US, Inc.
InventorsJeffery Morrison, Tabitha Katelyn Fox
Life of this patent
Estimating the term…
Abstract
A stage collar having a mandrel and a closing sleeve disposed in and releasably coupled to the mandrel. One or more ports of the closing sleeve align with one or more ports of the mandrel when the stage collar is in a run in position. An opening sleeve is disposed in and releasably coupled to the mandrel. A protection sleeve is disposed in and releasably coupled to the opening sleeve. The protection sleeve comprises one or more seals configured to seal one or more bores formed through a sidewall of the opening sleeve when the stage collar is in the run in position.
Claims18
A stage collar assembly, comprising:
- a mandrel;
- an inflatable packer coupled to the mandrel;
- a closing sleeve disposed in and releasably coupled to the mandrel, wherein the closing sleeve has one or more ports in alignment with one or more ports of the mandrel when the stage collar is in a run in position;
- an opening sleeve disposed in and releasably coupled to the mandrel;
- and
- a protection sleeve disposed in and releasably coupled to the opening sleeve, wherein the protection sleeve comprises one or more seals configured to seal one or more bores formed through a sidewall of the opening sleeve when the stage collar is in the run in position.
A method of operating a stage collar, comprises:
- lowering the stage collar in a wellbore in a run in position, wherein when the stage collar is in the run in position, one or more cementing ports of an upper mandrel of the stage collar are aligned with one or more cementing ports of a closing sleeve of the stage collar;
- pumping a closing device into the stage collar such that a first outer seating surface of the closing device engages an inner seating surface of a protection sleeve disposed within an opening sleeve of the stage collar;
- pressurizing the stage collar to shear one or more shearable members disposed between the protection sleeve and the opening sleeve;
- and
- moving the protection sleeve relative to the opening sleeve to open fluid communication through one or more bores formed in a sidewall of the opening sleeve.
A method of operating a stage collar, comprises:
- lowering the stage collar in a wellbore in a run in position;
- pumping a closing device into the stage collar such that a first outer seating surface of the closing device engages an inner seating surface of a protection sleeve disposed within an opening sleeve of the stage collar;
- moving the protection sleeve relative to the opening sleeve to open fluid communication through one or more bores formed in a sidewall of the opening sleeve;
- pumping fluid through the bores to inflate an inflatable packer;
- moving the closing device such that a second outer seating surface of the closing device engages an inner seating surface of a closing seat coupled to a closing sleeve of the stage collar;
- moving the closing sleeve to move a lock ring outward into a recess formed in a mandrel of the stage collar to place the stage collar into a closed and locked position;
- and
- pressurizing the stage collar to shear one or more shearable members disposed between the opening sleeve and the mandrel to move the closing device into engagement with the closing seat.
Dependencies are inferred from the claim text.