Brush Tool for Well Plug and Abandonment Operations and Installation of Completion Products
AssigneeHalliburton Energy Services, Inc.
InventorGunnar Lehrling
Life of this patent
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Abstract
A brush tool for well plug and abandonment operations is provided by affixing a brush tool to an outer diameter of a work string; advancing the work string to a first predetermined depth in a wellbore of a well; retracting the brush tool to a second predetermined depth in the wellbore further uphole than the first predetermined depth; setting a cement retainer and injecting a sealing medium through the work string into the wellbore at the first predetermined depth to plug the well. In some cases, the brush tool is detached with a cement retainer from the work string, while down bore; and the work string (without the brush tool affixed thereto) is removed from the wellbore.
Claims20
A method, comprising:
- affixing a brush tool to an outer diameter of a work string;
- advancing the work string to a first predetermined depth in a wellbore of a well;
- retracting the brush tool to a second predetermined depth in the wellbore further uphole than the first predetermined depth;
- and
- injecting a sealing medium through the work string into the wellbore at the first predetermined depth to plug the well.
A method, comprising:
- sliding a brush tool onto an outer diameter of a work string;
- advancing the work string into a wellbore to a first predetermined depth in the wellbore, wherein the brush tool contacts an inner diameter of the wellbore;
- retracting the work string to a second predetermined depth in the wellbore, uphole from the first predetermined depth;
- and
- after retracting the work string to the second predetermined depth in the wellbore, injecting a sealing medium into the wellbore at the first predetermined depth to the second predetermined depth.
A method, comprising:
- securing a brush tool around an outer diameter of a work string by securing a first portion of the brush tool to a second portion of the brush tool;
- advancing the work string to a first predetermined depth in a wellbore of a well, wherein the brush tool contacts an inner diameter of the wellbore;
- retracting the work string to a second predetermined depth in the wellbore, less than the first predetermined depth;
- and
- injecting, after retracting the work string to the second predetermined depth in the wellbore and setting a cement retainer, a sealing medium into the wellbore at the first predetermined depth to the second predetermined depth.
Dependencies are inferred from the claim text.