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US 2013/0213658 A1Published application
Methods and systems for wiping surfaces when performing subterranean operations
AssigneeHalliburton Energy Services, Inc.
InventorsGary Joe Makowiecki, Patrick Lyle Cherney
Life of this patent
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Abstract
Improved darts and methods of using these darts in subterranean wells are disclosed. The improved dart comprises a foam portion and a rubber portion coupled to the foam portion. A dart nose is coupled to at least one of the foam portion and the rubber portion. The foam portion and the rubber portion are configured to interface with an inner surface of at least one of a well bore wall, a pipe, and a casing string.
Claims16
A dart comprising:
- a foam portion;
- a rubber portion coupled to the foam portion;
- and
- a dart nose coupled to at least one of the foam portion and the rubber portion;
- wherein the foam portion and the rubber portion are configured to interface with an inner surface of at least one of a well bore wall, a pipe, and a casing string.
2 more elements
A method of cleaning a restriction in a casing comprising:
- placing a dart in the restriction;
- wherein the dart comprises a foam portion coupled to a rubber portion;
- passing the dart through the restriction;
- wherein at least one of the foam portion and the rubber portion cleans an
- inner surface of the restriction;
- and
- directing the dart out of the restriction to a wider portion of the casing;
- wherein a diameter of the wider portion of the casing exceeds a diameter of the restriction;
- and
- wherein the rubber portion interfaces with an inner surface of the wider portion of the casing before the foam portion interfaces with an inner surface of the wider portion of the casing.
7 more elements
Dependencies are inferred from the claim text.