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近几年来,空心抽油杆采油技术发展很快,它结构简单、强度高、使用方便,特别是对高凝油和高含蜡原油的开采更具独特的优点。通过空心抽油杆可在油井的油管内形成一个正循环系统和工作通道,经这一系统和通道可向井内注入热载体、化学降粘剂、清蜡剂及下热电缆等,以达到降低井中原油粘度,溶解井筒结蜡,提高原油流动性,降低油井作业次数的目的。经在全国各油田400多口井的应用,均取得了明显的经济效益。
In recent years, hollow sucker rod extraction technology has developed rapidly, it has the advantages of simple structure, high strength and convenient use, especially for the extraction of high pour point oil and waxy crude oil. Through the hollow sucker rod can form a positive circulation system and working channel in the tubing of the oil well. Through this system and channel, heat carrier, chemical viscosity reducer, wax removing agent and lower heat cable can be injected into the well to reduce Viscosity of crude oil in well, dissolution of wellbore wax, improve the fluidity of crude oil, reduce the number of wells operations purposes. Through the application of more than 400 wells in all oil fields across the country, significant economic benefits have been achieved.