IP Library › Granted Patent US 12669028
Granted Patent B2
US 12669028 · App. 18/620,072 · Granted Jun 30, 2026

Wellbore cleaning tools

Inventors: Graham Stronach (Spring, TX); Shantanu N. Swadi (Cypress, TX); David Johnson (Houston, TX); David Moyer (Houston, TX); Mitul Patel (Houston, TX); Delaney Olstad (Houston, TX)
Assignee: Wellbore Integrity Solutions LLC
E21B31/06E21B37/00E21B17/1057E21B17/1064
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12669028
App. No.
18/620,072
Granted
Jun 30, 2026
Kind
B2
Abstract

A downhole magnetic tool for use in a wellbore includes a mandrel and a magnet assembly coupled to the mandrel. The magnet assembly includes a magnet retainer having a chamber and a magnet disposed in the chamber. A bracket is used to retain the magnet in the chamber. The magnet assembly also includes one or more apertures configured to engage a magnet removal tool.

Claims (26)

1 . A downhole magnetic tool for use in a wellbore, the tool comprising:

a mandrel including a slot having a groove; and

a plurality of magnet assemblies coupled to the mandrel, each magnet assembly having:

a magnet retainer having a chamber and a spline for engaging the groove, whereby the magnet assembly is movably coupled to the mandrel;

a magnet disposed in the chamber;

a bracket for retaining the magnet in the chamber; and

one or more apertures configured to engage a magnet removal tool.

2 . The tool of claim 1 , wherein the bracket is at least partially disposed in a recess formed in the magnet retainer.

3 . The tool of claim 1 , wherein the magnet comprises rare earth metals.

4 . The tool of claim 1 , wherein the magnet retainer comprises a nonmagnetic material.

5 . The tool of claim 1 , further comprising a coating disposed around the magnet.

6 . The tool of claim 5 , wherein the coating comprises a polymer, non-ferrous metal, a nonmagnetic material, or combinations thereof.

7 . The tool of claim 1 , wherein the one or more apertures are axially spaced away from the chamber.

8 . The tool of claim 1 , wherein the one or more apertures are formed on a top surface of the magnet retainer, and the top surface covers the magnet.

9 . The tool of claim 1 , wherein the magnet retainer includes a bottom surface for contacting the mandrel and a top surface that covers the magnet.

10 . The tool of claim 1 , wherein the mandrel includes a plurality of ribs circumferentially spaced around the mandrel, and the slot is formed in a sidewall of the plurality of ribs.

11 . The tool of claim 1 , wherein the magnet is at least partially disposed in the slot of the mandrel.

12 . The tool of claim 1 , wherein the mandrel includes a plurality of slots, wherein each slot includes a groove for receiving the spline of at least one magnet assembly of the plurality of magnet assemblies.

13 . A downhole magnetic tool for use in a wellbore, the tool comprising:

a mandrel including a slot having a groove; and

a magnet assembly coupled to the mandrel, the magnet assembly having:

a magnet retainer having a chamber and a spline for engaging the groove, whereby the magnet assembly is movably coupled to the mandrel;

a magnet disposed in the chamber and at least partially disposed in the slot; and

a bracket for retaining the magnet in the chamber, wherein the bracket is at least partially disposed in a recess formed in the magnet retainer.

14 . The tool of claim 13 , further comprising a coating disposed around the magnet.

15 . The tool of claim 13 , wherein the magnet retainer includes a bottom surface for contacting the mandrel and a top surface that covers the magnet.