Using Changqing and Qinghai waxy crude oils as research objects, the depressive effects of ethylene-vinyl acetate (EVA) copolymer pour point depressant on the waxy crude oils were studied.
以长庆、青海含蜡原油为研究对象，考察乙烯-醋酸乙烯酯共聚物(简称EVA)降凝剂对含蜡原油的降凝效果。
In the light of the difficulty in artificial lifting of waxy oil well, high pour-point oil well and viscous oil well, a new tubing heating system is developed.
针对含蜡油井、高凝油井、稠油油井生产过程中的举升难题，研制了一种新型油管加热采油装置。
More than 80% of crude oils produced in China are the high-pour-point waxy crude or the viscous heavy crude with poor flow ability.
我国所产原油80%以上为流动性较差的高凝含蜡原油和高粘重质原油。
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