# US 11,111,925 B2 · Prevention of ferromagnetic solids deposition on electrical submersible pumps (ESPS) by magnetic means

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- Number: US 11,111,925 B2
- Document ID: US11111925B2
- Status: Granted
- Kind: B2
- Application number: 16/170,677
- Filed: 2018-10-25
- Published: 2020-04-30
- Granted: 2021-09-07
- Earliest claimed: 2018-10-25
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Mohannad Abdelaziz; Rafael Adolfo Lastra Melo
- Web page: https://patentgrep.com/patent/US11111925B2

## CPC

- B03C 1/288: {disposed at the outer circumference of a recipient}
- E21B 41/00: Equipment or details not covered by groups E21B15/00 - E21B40/00
- B03C 1/0335: {using coils}
- E21B 43/128: {Adaptation of pump systems with down-hole electric drives}
- F04D 13/086: {the pump and drive motor are both submerged}
- B03C 2201/18: Magnetic separation whereby the particles are suspended in a liquid
- F04B 53/20: Filtering
- F04B 2205/501: of solid particles
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)

## Abstract

A system is provided for use with an electrical submersible pump (ESP). The system includes an ESP mounted on a tubing and a magnetic field source positioned above the ESP. The magnetic field source generates a magnetic field configured to suspend iron-containing particles above a discharge of the ESP. The magnetic field prevents an accumulation of the iron-containing particles onto components of the ESP during a powered-off state of the ESP.

## Claims

### Claim 1

A system comprising:
an electrical submersible pump (ESP) mounted on a tubing;
a magnetic field source positioned above the electrical submersible pump (ESP), the magnetic field source configured to generate a magnetic field configured to suspend iron-containing particles above a discharge of the electrical submersible pump (ESP), the magnetic field preventing an accumulation of the iron-containing particles onto components of the electrical submersible pump (ESP) during a powered-off state of the electrical submersible pump (ESP); and
a controller configured to switch between powering the electrical submersible pump (ESP) and powering the magnetic field source, by energizing a selected one of the electrical submersible pump (ESP) and the magnetic field source based on an amplitude of voltage supplied to the controller.

### Claim 2 (depends on 1)

The system of claim 1, wherein the magnetic field is longitudinal to the tubing.

### Claim 3 (depends on 1)

The system of claim 1, wherein the magnetic field comprises a magnetic force acting radially outward from the tubing.

### Claim 4 (depends on 1)

The system of claim 1, wherein the magnetic field source comprises an electric coil generating the magnetic field.

### Claim 5 (depends on 4)

The system of claim 4, wherein the electric coil is powered using a same power supply as the electrical submersible pump (ESP).

### Claim 6 (depends on 4)

The system of claim 4, wherein the electric coil is powered using a first power supply, and the electrical submersible pump (ESP) is powered using a second power supply which is separate from the first power supply.