Subsea controlled milling
AssigneeHalliburton Energy Services, Inc.
InventorsJoseph E. Hess, Neil Hepburn, Benji Smith, John J. Guerrero, Ian W. Thackwray
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Abstract
Subsea controlled milling apparatus and methods. In a described embodiment, a method of controlling displacement of a cutting device conveyed on a tubular string in a subterranean well includes the steps of: interconnecting an apparatus in the tubular string, the apparatus including an axial advancement device and an anchoring device; actuating the anchoring device to anchor the apparatus in the well; applying a pressure differential to the advancement device, thereby displacing the cutting device relative to the apparatus; and operating the cutting device to cut a structure in the well.
Claims26
A method of controlling displacement of a cutting device conveyed on a tubular string in a subterranean well, the method comprising the steps of:
- interconnecting an apparatus in the tubular string, the apparatus including an axial advancement device and an anchoring device;
- actuating the anchoring device to anchor the apparatus in the well;
- applying a pressure differential to the advancement device, thereby displacing the cutting device relative to the apparatus;
- and
- operating the cutting device to cut a structure in the well.
A system for controlling displacement of a cutting device in a cutting operation in a subterranean well, the system comprising:
- the cutting device interconnected at a lower end of a tubular string;
- and
- an apparatus interconnected in the tubular string above the cutting device, the apparatus including an anchoring device operative to anchor the apparatus in the well, and an advancement device responsive to a pressure differential in the apparatus, the advancement device being operative to control axial displacement of the cutting device relative to the apparatus.
Apparatus for controlling displacement of a cutting device in a subterranean well, the apparatus comprising:
- an advancement device responsive to a pressure differential in the apparatus to axially displace the cutting device relative to the apparatus;
- and
- an anchoring device configured to anchor the apparatus in the well.
Dependencies are inferred from the claim text.