# US 10,480,299 B2 · Downhole chemical injection method and system for use in ESP applications

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- Number: US 10,480,299 B2
- Document ID: US10480299B2
- Status: Granted
- Kind: B2
- Application number: 16/122,678
- Filed: 2018-09-05
- Published: 2019-01-03
- Granted: 2019-11-19
- Earliest claimed: 2014-06-19
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Jinjiang Xiao; Hattan Banjar
- Web page: https://patentgrep.com/patent/US10480299B2

## CPC

- E21B 37/06: using chemical means for preventing or limiting {, e.g. eliminating,} the deposition of paraffins or like substances
- E21B 41/02: in situ inhibition of corrosion in boreholes or wells
- E21B 43/128: {Adaptation of pump systems with down-hole electric drives}
- E21B 47/008: Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions
- F04B 47/06: having motor-pump units situated at great depth
- F04C 13/008: {Pumps for submersible use, i.e. down-hole pumping}
- F04D 1/04: Helico-centrifugal pumps
- F04D 13/08: for submerged use
- F04F 5/10: displacing liquids, e.g. containing solids, or liquids and elastic fluids
- F04B 17/03: driven by electric motors
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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)
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F04F: PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED {(evacuating by sorption F04B)}; SIPHONS {(conveying materials in bulk by flows of gas, liquid of foam B65G53/00)}

## Abstract

A chemical injection pump is installed below an electric submersible pump. In general, the chemical injection pump is either driven by an electric motor that draws power from the electric submersible pump motor or from energized fluid leaving the electric submersible pump output port. The electric submersible pump provides electric or hydraulic power to run the chemical injection pump.

## Claims

### Claim 1

A damage resistant apparatus for enhancing production from a well, the apparatus comprising:
a chemical injection pump component operable to be disposed in the well; and
an electric submersible pump component, the electric submersible pump component including:
an electric pump having a top electric pump portion and a bottom electric pump portion,
a seal having a top seal portion and bottom seal portion,
an electric submersible pump motor having a top electric submersible pump motor portion and a bottom electric submersible pump motor portion, and
a monitoring tool having a top monitoring tool portion and a bottom monitoring tool portion,
the electric pump having an electric pump intake operable to receive production fluids, the top seal portion adapted to be connected to the bottom electric pump portion and the bottom seal portion adapted to be connected to the top electric submersible pump motor portion, the bottom electric submersible pump motor portion adapted to be connected to the top monitoring tool portion,
the bottom monitoring tool portion adapted to be connected to the chemical injection pump component, the chemical injection pump component including a chemical injection pump motor having a top chemical injection pump motor portion and a bottom chemical injection pump motor portion, and a chemical pump having a top chemical pump portion and a bottom chemical pump portion, the chemical injection pump having an intake port connected to a capillary tube extending from the intake port to a surface of the well, the capillary tube configured to receive an inhibitor from a tank at the surface,
the bottom chemical injection pump motor portion adapted to be connected to the top chemical pump portion, and the top chemical injection pump motor portion adapted to be connected to the bottom monitoring tool portion such that the inhibitor is pumped into the well in suitable amounts so as to protect the electric submersible pump component from downhole conditions.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the chemical injection pump component is a positive displacement pump.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the chemical injection pump component is a centrifugal pump.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the chemical injection pump is electrically driven by a power supply from the electric submersible pump motor.

### Claim 5 (depends on 1)

The apparatus of claim 1, further having an electric cable for receiving a power supply.