Positive and negative pressure pulse airflow generation system and airflow generation method for drilling fluid vibrating screen

• Main Authors: ZHANG FU, LIU LEI, YANG XIANGQIAN, WANG JUNYAN, ZHOU CHAO, LIU SHANGRUI, GUO HUA, MA YINGWEN
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2024
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention relates to a positive and negative pressure pulse airflow generation system and method for a drilling fluid vibrating screen. The system comprises a high-pressure fan and a duplex electric rotating three-way valve. The high-pressure fan is provided with an air inlet and an air outlet; the duplex electric rotary three-way valve is provided with a first connector, a second connector, a third connector and a fourth connector, the first connector is connected with the air inlet through a valve back negative pressure pipe, the second connector is connected with the air outlet through a valve front positive pressure pipe, and the third connector is connected with a gas-assisted bin of the vibrating screen box through a valve front negative pressure pipe. The fourth interface is connected with the gas-assisted bin through a downstream positive pressure pipe; according to the system, a duplex electric rotating three-way valve is combined with continuous operation of a high-pressure fan, so that a gas pa