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US 11,891,870 B2Granted
Use of halbach array in downhole debris retrieval magnets
AssigneeHalliburton Energy Services, Inc.
InventorsPeter Reid Maher, Robert W. Bennett, David Allen Dockweiler
Life of this patent
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Abstract
Provided, in one aspect, is a downhole magnetic debris removal apparatus. The downhole magnetic debris removal apparatus, in one aspect, includes a housing having a longitudinal axis, and a plurality of magnets arranged as one or more Halbach arrays of magnets coupled to the housing, the one or more Halbach arrays of magnets having a strong side and a weak side.
Claims20
A downhole magnetic debris removal apparatus, comprising:
- a housing having a longitudinal axis;
- and
- a plurality of magnets arranged as Halbach arrays of magnets coupled to the housing, the Halbach arrays of magnets having a strong side and a weak side, wherein at least a first Halbach array of the Halbach arrays of magnets and a second Halbach array of the Halbach arrays of magnets are linearly aligned and touching each other within a carrier capable of independently retaining the plurality of magnets.
A method for cleaning a wellbore, comprising:
- lowering a downhole magnetic debris removal apparatus within a wellbore using a conveyance, the downhole magnetic debris removal apparatus including:
- a housing having a longitudinal axis;
- and
- a plurality of magnets arranged as Halbach arrays of magnets coupled to the housing, the Halbach arrays of magnets having a strong side and a weak side, wherein at least a first Halbach array of the Halbach arrays of magnets and a second Halbach array of the Halbach arrays of magnets are linearly aligned and touching each other within a carrier capable of independently retaining the plurality of magnets;
- and
- moving the downhole magnetic debris removal apparatus up and down within the wellbore to collect magnetic debris.
3 more elements
A well system, comprising:
- a wellbore;
- and
- a downhole magnetic debris removal apparatus positioned within the wellbore using a conveyance, the downhole magnetic debris removal apparatus including:
- a housing having a longitudinal axis;
- and
- a plurality of magnets arranged as Halbach arrays of magnets coupled to the housing, the Halbach arrays of magnets having a strong side and a weak side, wherein at least a first Halbach array of the Halbach arrays of magnets and a second Halbach array of the Halbach arrays of magnets are linearly aligned and touching each other within a carrier capable of independently retaining the plurality of magnets.
3 more elements
Dependencies are inferred from the claim text.