# US 2020/0400005 A1 · Electro-hydraulic hybrid drive sand-mixing equipment

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- Number: US 2020/0400005 A1
- Document ID: US20200400005A1
- Status: Published application
- Kind: A1
- Application number: 16/834,453
- Filed: 2020-03-30
- Published: 2020-12-24
- Earliest claimed: 2019-06-18
- Assignees: Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
- Applicants: Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
- Inventors: Maomao Han; Weiwei Liu; Yongcheng Liu; Yipeng Wu; Shuwei Li; Shijun Song; Lianpan Duan
- Web page: https://patentgrep.com/patent/US20200400005A1

## CPC

- E21B 43/2607: {Surface equipment specially adapted for fracturing operations}
- E21B 43/267: reinforcing fractures by propping
- B01F 23/59: {Mixing systems, i.e. flow charts or diagrams}
- B01F 33/5013: {movable by mechanical means, e.g. hoisting systems, grippers or lift trucks}
- B01F 35/3204: {Motor driven, i.e. by means of an electric or IC motor}
- B01F 35/32045: {Hydraulically driven}
- B01F 35/7176: {using pumps}
- B01F 35/71775: {using helical screws}
- E21B 43/26: by forming crevices or fractures
- B01F 2101/49: Mixing drilled material or ingredients for well-drilling, earth-drilling or deep-drilling compositions with liquids to obtain slurries
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)

## Abstract

The present invention discloses electro-hydraulic hybrid drive sand-mixing equipment, including a skid base, an electric motor, a hydraulic pump, a discharge centrifugal pump, a suction centrifugal pump, a mixing tank, a dry additive system, a liquid additive system, and a sand auger system. The electric motor, the hydraulic pump, the discharge centrifugal pump, the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system are integrally skid mounted on the skid base. There are two electric motors, including a first electric motor and a second electric motor. The first electric motor drives the discharge centrifugal pump, and the second electric motor actuates the hydraulic pump, to drive the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system. The electric motor is an integrated variable-frequency drive electric motor. Beneficial effects: Two integrated variable-frequency drive electric motors are applied. First, the setup of an independent variable-frequency drive cabinet is effectively omitted, that is, the overall size of the sand-mixing equipment is effectively reduced, so that it is more flexible and convenient to transport the equipment and arrange a well site. Next, a control system is simpler, thus optimizing the power matching of the sand-mixing equipment.

## Claims

### Claim 1

Electro-hydraulic hybrid drive sand-mixing equipment, comprising a skid base, an electric motor, a hydraulic pump, a discharge centrifugal pump, a suction centrifugal pump, a mixing tank, a dry additive system, a liquid additive system, and a sand auger system, wherein the electric motor, the hydraulic pump, the discharge centrifugal pump, the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system are integrally skid mounted on the skid base, there are two electric motors, comprising a first electric motor and a second electric motor, the first electric motor is configured to drive the discharge centrifugal pump, the second electric motor actuates the hydraulic pump, to drive the suction centrifugal pump, the mixing tank, the dry additive system, the liquid additive system, and the sand auger system, and the electric motor is an integrated variable-frequency drive electric motor.

### Claim 2 (depends on 1)

The electro-hydraulic hybrid drive sand-mixing equipment according to claim 1, wherein the electro-hydraulic hybrid drive sand-mixing equipment further comprises a suction manifold and a discharge manifold, and the suction manifold and the discharge manifold are separately disposed on a left side and a right side of the skid base.

### Claim 3 (depends on 1)

The electro-hydraulic hybrid drive sand-mixing equipment according to claim 1, wherein the second electric motor is disposed at a front end portion of the skid base.

### Claim 4 (depends on 2)

The electro-hydraulic hybrid drive sand-mixing equipment according to claim 2, wherein the first electric motor is connected to the discharge centrifugal pump through a coupling, the first electric motor is disposed on a side of the discharge manifold, and the first electric motor and the discharge manifold are arranged up and down in space.

### Claim 5 (depends on 1)

The electro-hydraulic hybrid drive sand-mixing equipment according to claim 1, wherein the second electric motor actuates the hydraulic pump through a transfer case.