Antifreeze device for dual-reagent oil well wellhead dosing pipeline and antifreeze method

• Main Authors: TIAN DIANLONG, LI YONGCHANG, YU YANG, WEI XIAOLIN, LI LI, BAI XIAOHONG, YANG CANGHAI, FAN CHEN
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2019
• 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 provides an antifreeze device for a dual-reagent oil well wellhead dosing pipeline and an antifreeze method. During operation, purge time only needs to be set on a remote control terminal, an oil-based anti-wax remover with the antifreeze property is utilized to purge an entire dosing pipeline system, and after the dosing pipeline is filled with the oil-based anti-wax remover, an RTUcontrols a metering plunger pump and other solenoid valves to close to complete antifreeze. The disadvantages of large amount of construction and high energy consumption due to the fact that a dosingpipeline from a previous dosing device to a wellhead adopts heat tapes to perform antifreeze and heat preservation are overcome. Only the RTU is required to perform simple solenoid valve and pump control according to a program, and the antifreeze and anti-blockage of the pipeline can be realized. The operation is simple, the structure of the dosing device is greatly simplified, energy consumptionis saved, the construction