Device and method for continuous mixing of solid drag reducer

Patent metadata

Field	Value
Publication number	US-12331601-B2
Application number	US-202117546098-A
Country	US
Kind code	B2
Filing date	Dec 9, 2021
Priority date	Jan 8, 2020
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

The present disclosure relates to a device and method for continuous mixing of a solid drag reducer. The device for continuous mixing of a solid drag reducer comprises a raw material storage device ( 1 ), a pneumatic raw material delivery device ( 2 ), a power device ( 3 ), a flow testing device ( 4 ) and a dissolving device ( 5 ). The method for continuous mixing of a solid drag reducer uses the device for continuous mixing of a solid drag reducer, which can realize continuous mixing of the solid drag reducer during large-scale volume fracturing.

First claim

The invention claimed is:

1. A device for continuous mixing of a solid drag reducer, comprising a raw material storage device, a pneumatic raw material delivery device, a power device, a flow testing device, a dissolving device, and a water supply device, wherein:
the raw material storage device is for supplying a solid drag reducer to the pneumatic raw material delivery device;
the pneumatic raw material delivery device is connected respectively to the raw material storage device, the power device, and the flow testing device, for delivering the solid drag reducer in the raw material storage device to the dissolving device with compressed air as a power source;
the dissolving device is connected to the flow testing device, for dissolving the solid drag reducer;

the dissolving device is a gear pump, a plunger pump, or an emulsification pump;
the water supply device is connected to the dissolving device, and is used to provide the dissolving device with water for dissolving the solid drag reducer;
the power device is for supplying the compressed air as the power source to the pneumatic raw material delivery device;
the flow testing device is disposed between the pneumatic raw material delivery device and the dissolving device, for measuring a flow rate of the solid drag reducer delivered from the pneumatic raw material delivery device to the dissolving device and adjusting a delivery rate of raw material from the pneumatic raw material delivery device according to the flow rate;
the pneumatic raw material delivery device is connected to the raw material storage device via a first pipeline; the pneumatic raw material delivery device is connected to the power device via a second pipeline; the pneumatic raw material delivery device is connected to the flow testing device via a third pipeline; the dissolving device is connected to the flow testing device via a fourth pipeline; the dissolving device is connected to the water supply device via a sixth pipeline;
the first pipeline has a pipe length of 0.2 m to 0.5 m, and a pipe diameter of 4 mm to 8 mm; the second pipeline has a pipe length of 1 m to 3 m, and a pipe diameter of 1 mm to 5 mm; the third pipeline has a pipe length of 1 m to 2 m, and a pipe diameter of 8 mm to 15 mm; the fourth pipeline has a pipe length of 2 m to 3 m, and a pipe diameter of 8 mm to 15 mm; the sixth pipeline has a pipe length of 1 m to 10 m and a pipe diameter of 10 mm to 20 mm;
the pneumatic raw material delivery device includes a centrifugal ventilator, a centrifugal blower, a turbo-type air compressor, or a pneumatic diaphragm pump;
the power device includes an air compressor;
the flow testing device includes a testing device and a display device; and
the device for continuous mixing of the solid drag reducer further comprises a sand mixing device connected to the dissolving device, wherein the sand mixing device is used to inject the solid drag reducer dissolved in the dissolving device into a reservoir to be fractured.

2. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all made of transparent plastic.

3. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the sand mixing device is connected to the dissolving device via a fifth pipeline; and the fifth pipeline has a pipe length of 10 m to 20 m and a pipe diameter of 15 mm to 25 mm.

4. The device for continuous mixing of a solid drag reducer according to claim 3 , wherein the fifth pipeline is made of stainless steel.

5. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the sixth pipeline is made of stainless steel.

6. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the maximum volume of the raw material storage device is 50 L.

7. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the measurement range of the flow testing device is 0 kg/min to 25 kg/min.

8. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the maximum volume of the dissolving device is 5 L.

9. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the pneumatic raw material delivery device is made of stainless steel.

10. The device for continuous mixing of a solid drag reducer according to claim 1 , wherein the inner wall of a cavity of the dissolving device is made of stainless steel.

11. A method for continuous mixing of a solid drag reducer by using the device of claim 1 , comprising the steps of:
adding a solid drag reducer to the raw material storage device;
starting the power device to drive the operation of the pneumatic raw material delivery device;
delivering the solid drag reducer from the raw material storage device to the dissolving device via the pneumatic raw material delivery device;
by the flow testing device, measuring the flow rate of the solid drag reducer delivered between the pneumatic raw material delivery device and the dissolving device, and adjusting the delivery rate of raw material from the pneumatic raw material delivery device according to the flow rate; and
allowing the solid drag reducer to dissolve in the dissolving device to complete the mixing of the solid drag reducer.

12. The method for continuous mixing of a solid drag reducer according to claim 11 , wherein the delivery rate of raw material from the pneumatic raw material delivery device is 1 kg/min to 10 kg/min.

13. The method for continuous mixing of a solid drag reducer according to claim 11 , wherein the pressure provided by the power device is 5 kPa to 100 kPa.

14. The method for continuous mixing of a solid drag reducer according to claim 11 , wherein the rotation speed of the dissolving device is 2000 r/min to 4000 r/min.

15. The method for continuous mixing of a solid drag reducer according to claim 11 , wherein the dissolution time of the solid drag reducer in the dissolving device is not more than 60 sec.

16. The method for continuous mixing of a solid drag reducer according to claim 11 , wherein the solid drag reducer is a polyacrylamide-based drag reducer.

17. The method for continuous mixing of a solid drag reducer according to claim 11 , wherein the particle size of the solid drag reducer is 60 mesh to 100 mesh.

Assignees

• Petrochina Co Ltd

Inventors

• Chen Pengfei
• Chang Honggang
• Xiong Gang
• Liu Youquan
• Zhang Yadong
• Zhou Chengmei
• Liao Jia

Classifications

• B01F35/71761

  Membrane pumps · CPC title

• B01F35/7181

  using fans or turbines · CPC title

• B01F35/712

  for feeding fluids · CPC title

• B01F35/2211

  Amount of delivered fluid during a period · CPC title

• B01F21/20

  using flow mixing · CPC title