Sand mixing device and method for carbon dioxide pure dry fracturing

• Main Authors: LIN SHUJUN, NIU RONG, ZHANG TIANLIN, SHI PENGJU, JU JINGZHAI, YANG LONGFEI, LU HAILONG, ZHANG LONGYANG, BAI SHANGYI, LI TIANLEI, CAO CHANGQING
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2023
• Subjects: MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TRANSPORTING

The invention relates to the technical field of petroleum and natural gas extraction equipment, in particular to a sand mixing device and method for carbon dioxide pure dry fracturing, and the sand mixing device comprises a working tank, a preparation tank I, a preparation tank II, a sensing module and a sand feeding device; a sand outlet of the sand feeding device fixedly communicates with a horizontal spiral sand conveyor, a sand outlet of the horizontal spiral sand conveyor fixedly communicates with a first preparation tank and a second preparation tank, the bottom of the first preparation tank and the bottom of the second preparation tank fixedly communicate with a working tank, and the bottom of the working tank fixedly communicates with a mixer. The device is simple in structure, and through mutual switching of the first preparation tank, the second preparation tank and the corresponding control butterfly valves, it is guaranteed that the sand discharging opening of the working tank discharges sand cont