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US 10,895,129 B2Granted
Open hole drilling magnet
AssigneeM-l Drilling Fluids U.K. Limited
InventorsJames Linklater, James Edward Atkins, George Telfer
Life of this patent
Estimating the term…
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.
Claims26
An apparatus comprising:
- a cylindrical tool main body defining an axial centerline, the cylindrical tool main body comprising:
- a first bladed magnet section having at least one first blade extending outwardly from the axial centerline at a first angle;
- a second bladed magnet section having at least one second blade extending outwardly from the axial centerline at a second angle;
- a hardfaced cylindrical section extending from the first bladed magnet section to the second bladed magnet section, wherein an outer circumference of the hardfaced cylindrical section defines an outermost circumference of the cylindrical tool main body, and further wherein the hardfaced cylindrical section has a smooth continuous circumferential surface extending from the first bladed magnet section to the second bladed magnet section and is free of ribs;
- and
- an upper end configured for suspending the cylindrical tool main body,
- wherein the first bladed magnet section and the second bladed magnet section each comprise slots therein for receiving and securing magnets, and
- wherein at least one slot of the slots comprises:
- opposing flanges:
- at least two magnets disposed within the at least one slot and magnetically coupled to one another such that a north pole of one magnet of the at least two magnets is in direct physical contact with a south pole of another magnet of the at least two magnets;
- and
- a retainer system for securing the at least two magnets, such that the at least two magnets are in direct physical contact with one another.
9 more elements
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 extending from the first bladed magnet section to the second bladed magnet section,
- wherein the third circumference is greater than the first circumference and the second circumference,
- further wherein the hardfaced cylindrical section has a smooth continuous circumferential surface extending from the first bladed magnet section to the second bladed magnet section and is free of ribs,
- wherein the first bladed magnet section and the second bladed magnet section each comprise slots therein for receiving and securing magnets, and
- wherein at least one slot of the slots comprises:
- opposing flanges;
- at least two magnets disposed within the at least one slot and magnetically coupled to one another such that a north pole of one magnet of the at least two magnets is in direct physical contact with a south pole of another magnet of the at least two magnets;
- and
- a retainer system for securing at least two magnets, such that the at least two magnets are in direct physical contact with one another.
9 more elements
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 third circumference;
- and
- at least one hardfaced cylindrical section defining a second circumference, the hardfaced cylindrical section extending from the first bladed magnet section to the second bladed magnet section,
- wherein the first bladed magnet section comprises at least one slot having:
- opposing flanges;
- at least two magnets disposed within the at least one slot and magnetically coupled to one another such that a north pole of one of the at least two magnets is in direct physical contact with a south pole of another magnet of the at least two magnets;
- and
- a retainer system for securing the at least two magnets, such that the at least two magnets are in direct physical contact with one another, and
- further wherein the first circumference and the third circumference are less than the second circumference, and the at least one hardfaced cylindrical section has a smooth continuous circumferential surface extending from the first bladed magnet section to the second bladed magnet section and is free of ribs.
7 more elements
A method of retrieving ferrous metal debris from a well, the method comprising:
- attaching an apparatus to a work string, the apparatus comprising
- a first bladed magnet section;
- a second bladed magnet section;
- and
- a hardfaced cylindrical section extending from the first bladed magnet section to the second bladed magnet section,
- wherein an outer circumference of the hardfaced cylindrical section defines an outermost circumference of the apparatus, and the hardfaced cylindrical section has a smooth continuous circumferential surface extending from the first bladed magnet section to the second bladed magnet section and is free of ribs,
- wherein the outer circumference of the hardfaced cylindrical section is greater than a circumference of the first bladed magnet section and a circumference of the second bladed magnet section,
- wherein the first bladed magnet section and the second bladed magnet section each comprise slots therein for receiving and securing magnets, and
- wherein at least one slot of the slots comprises:
- opposing flanges;
- at least two magnets disposed within the at least one slot and magnetically coupled to one another such that a north pole of one magnet of the at least two magnets is in direct physical contact with a south pole of another magnet of the at least two magnets;
- and
- a retainer system for securing the at least two magnets, such that
- the at least two magnets are in direct physical contact with one another;
- running the apparatus into an open-hole section of a wellbore;
- attracting and retaining ferrous metal debris in at least one of the first bladed magnet section and the second bladed magnet section;
- and
- removing the apparatus from the wellbore.
15 more elements
Dependencies are inferred from the claim text.