# US 12,000,251 B2 · Fracturing pumps

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- Number: US 12,000,251 B2
- Document ID: US12000251B2
- Status: Granted
- Kind: B2
- Application number: 17/345,995
- Filed: 2021-06-11
- Published: 2021-12-23
- Granted: 2024-06-04
- Earliest claimed: 2020-06-22
- Assignees: Stewart & Stevenson LLC
- Applicants: Stewart & Stevenson LLC
- Inventors: Jeff Rother; Brent Finley
- Web page: https://patentgrep.com/patent/US12000251B2

## CPC

- E21B 43/2607: {Surface equipment specially adapted for fracturing operations}
- F02B 63/06: for pumps
- F04B 17/03: driven by electric motors
- F04B 17/05: driven by internal-combustion engines
- F04B 17/06: Mobile combinations
- F04B 49/065: {and making use of computers}
- F04B 53/08: Cooling; Heating; Preventing freezing
- F04B 53/18: Lubricating
- F02B 63/047: {Movable engine-generator combinations on wheels}
- F04B 2205/09: Flow through the pump
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- 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 frac system includes an engine, the engine having a crankshaft and a radiator. The radiator includes a radiator cooling fan. The frac system also includes a transmission coupled to the engine and a frac pump coupled to the transmission, the frac pump including a frac pump lubricating oil pump. The frac system further includes a traction drive motor system. The traction drive motor system includes a first set of traction drive motors, the first set of traction drive motors mechanically connected to the crankshaft. The traction drive motor system also includes a second set of traction drive motors, the second set of traction drive motors mechanically connected to the radiator cooling fan. In addition, the traction drive motor system includes third set of traction drive motors, the third set of traction drive motors mechanically connected to the frac pump lubricating oil pump.

## Claims

### Claim 1

A frac system comprising:
an engine, the engine having a crankshaft and a radiator, the radiator including a radiator cooling fan;
a transmission coupled to the engine;
a frac pump coupled to the transmission, the frac pump including a frac pump lubricating oil pump; and
a traction drive motor system, the traction drive motor system including:
a first set of traction drive motors, the first set of traction drive motors mechanically connected to the crankshaft;
a second set of traction drive motors, the second set of traction drive motors mechanically connected to the radiator cooling fan; and
a third set of traction drive motors, the third set of traction drive motors mechanically connected to the frac pump lubricating oil pump;
wherein the first set of traction drive motors are in electrical communication with a power storage system, the power storage system is in electrical communication with electric motor controls; and
wherein the second set of traction drive motors and the third set of traction drive motors are in electrical and data communication with the electric motor controls.

### Claim 2 (depends on 1)

The frac system of claim 1, wherein the power storage system comprises batteries.

### Claim 3 (depends on 1)

The frac system of claim 1, wherein the engine, frac pump, transmission, and radiator are mounted on a trailer.

### Claim 4

A method comprising:
providing an engine, the engine having a crankshaft and a radiator, the radiator having a radiator fan;
mechanically connecting a first set of traction drive motors to the crankshaft;
generating electrical power using the first set of traction drive motors;
electrically connecting a second set of traction drive motors to the first set of traction drive motors;
operating the radiator fan using the second set of traction drive motors;
supplying a third set of traction drive motors, the third set of traction drive motors in electrical communication with the first set of traction drive motors and operating a frac pump lubricating oil pump with the third set of traction motors;
providing a power storage system, the power storage system in electrical communication with the first, second, and third set of traction drive motors; and
providing motor controls, the motor controls in data communication with the second and third set of traction drive motors.

### Claim 5 (depends on 4)

The method of claim 4, wherein the first set of traction drive motors are electrical power generators.

### Claim 6 (depends on 5)

The method of claim 5 further comprising controlling a rate of flow of lubrication oil by the frac pump lubricating oil pump using the motor controls.

### Claim 7 (depends on 6)

The method of claim 6, wherein the rate of flow of lubrication oil is determined by the requirements of a frac pump.

### Claim 8 (depends on 6)

The method of claim 6, wherein the rate of flow of lubrication oil is constant.