Open Hole Drilling Magnet
AssigneeM-I Drilling Fluids UK Limited
InventorsJames Linklater, James Edward Atkins, George Telfer
Life of this patent
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Abstract
Apparatus, and methods of use, where the apparatus includes a cylindrical tool main body defining an axial centerline, the main body having a first bladed magnet section having at least one blade extending substantially perpendicular from the axial centerline at a first angle, a second bladed magnet section having at least one blade extending substantially perpendicular from the axial centerline at a second angle, and a hardfaced cylindrical section disposed between the first bladed magnet section and the second bladed magnet section, wherein the outer circumference of the hardfaced cylindrical section defines the outer circumference of the tool main body.
Claims37
An apparatus comprising:
- a cylindrical tool main body defining an axial centerline, the main body comprising;
- a first bladed magnet section having at least one blade extending substantially perpendicular from the axial centerline at a first angle;
- a second bladed magnet section having at least one blade extending substantially perpendicular from the axial centerline at a second angle;
- and,
- a hardfaced cylindrical section disposed between the first bladed magnet section and the second bladed magnet section, wherein the outer circumference of the hardfaced cylindrical section defines the outer circumference of the tool main body;
- and,
- an upper end configured for suspending the tool main body.
A cleaning tool for use in cleaning ferrous material from an open-hole wellbore, the cleaning tool comprising:
- a first bladed magnet section defining a first circumference;
- a second bladed magnet section defining a second circumference;
- and
- a hardfaced cylindrical section defining a third circumference, the hardfaced cylindrical section disposed between the first bladed magnet section and the second bladed magnet section;
- wherein the third circumference is greater than or equal to the first circumference and the second circumference.
A cleaning tool for use in cleaning ferrous material from an open-hole wellbore, the cleaning tool comprising:
- a first bladed magnet section defining a first circumference;
- and
- at least one hardfaced cylindrical section defining a second circumference, the hardfaced cylindrical section disposed adjacent the bladed magnet section;
- wherein the first bladed magnet section comprises at least one slot having opposing chamfer flanged edges, at least one magnet disposed within the at least one slot, and a retainer system for securing the magnet within the at least one slot.
A method of retrieving ferrous metal debris from a well, the method comprising:
- attaching to a work string, an apparatus comprising a first bladed magnet section, a second bladed magnet section, and a hardfaced cylindrical section disposed between the first bladed magnet section and the second bladed magnet section;
- running the apparatus into an open-hole section of a wellbore;
- attracting and retaining ferrous metal debris in any of the first bladed magnet section and the second bladed magnet section;
- and
- removing the apparatus from the wellbore in order to remove the ferrous metal debris.
Dependencies are inferred from the claim text.