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US 12,460,510 B2Granted
Downhole magnet, downhole magnetic jetting tool and method of attachment of magnet pieces to the tool body
AssigneeOdfjell Well Service Norway AS
InventorsSimon Leiper, Kevin Robertson
Life of this patent
Estimating the term…
Abstract
A tool for suspending in a well retrieves various metal debris from the well, and includes an elongated tool body with a plurality of magnets included in a plurality longitudinal ridges which are circumferentially spaced. In the method a plurality of magnets can be positioned within openings, recesses, or pockets in each ridge, and held in place by one or more retaining plates, the tool being connected to a drill string and lowered into a well.
Claims20
A magnet tool for use in removing ferrous material from a wellbore, the tool comprising:
- an elongated tool body, the tool body having
- first and second ends;
- a longitudinal axis;
- and
- a through bore extending from the first to second end;
- a plurality of circumferentially spaced apart longitudinal ridges with spaces between each pair of said ridges,
- each ridge being in the form of
- a flange projecting radially from the longitudinal axis;
- and
- being aligned with the longitudinal axis,
- the flange having
- spaced apart first and second radially extending surface areas and an outer surface spaced away from the longitudinal axis and that extends
- from the first radially extending surface area
- to the second radially extending surface area;
- wherein each of the flanges includes
- at least one magnetic element
- detachably mounted in a spaced apart configurations,
- wherein each of said at least one magnetic element is
- held in place by a retaining plate,
- the retaining plate having an area exposing
- at least a portion of the at least one magnetic elements.
18 more elements
A method of cleaning debris in a wellbore comprising the steps of:
- (a) providing a magnet tool comprising:
- an elongated tool body,
- the tool body having
- first and second ends;
- a longitudinal axis;
- and
- a through bore extending from the first to second end;
- a plurality of circumferentially spaced apart longitudinal ridges with
- an extending space in between each pair of said ridges each said ridge
- projecting radially from the longitudinal axis and
- each of the longitudinal ridges having
- at least one longitudinally extending face each of the at least one longitudinally extending face having
- openings opening to
- at least one of the at least longitudinally extending face for said ridge;
- (b) for each of the plurality of longitudinal ridges inserting at least one magnet through the opening in the at least one longitudinally extending face for said ridge;
- (c) for each of the plurality of longitudinal ridges locking in place each of said inserted at least one magnet by moving a locking retainer plate in the longitudinal ridge, each of the locking retainer plate having openings to expose at least part of the the magnets inserted in step “b”;
- and
- (d) after step “c” inserting the magnet tool into a well bore and collecting debris in said gaps which is magnetically attracted to the magnets of step “b”.
15 more elements
Dependencies are inferred from the claim text.