Patent Number: 7,131,495

Title: Method for preparing a chlorine dioxide block-removing agent in oil wells

Abstract: A method to synthesize a chlorine dioxide block remover in a well is described. The method includes dissolving a chlorate aqueous solution and some acidic substances in water and to produce a hydrogen ion. The chlorate aqueous solution and acidic substances are quickly injected into the well by an injection pump, so they react with each other and produce chlorine dioxide. The synthesis of the chlorine block remover in the well removes oil layer blocks induced by polymers and microbes, while reducing the risk of explosion caused by leaked chlorine dioxide, and reducing the corrosion of equipment and pipes caused by chlorine dioxide.

Inventors: Hao; Zhanyuan (Taiyuan City, Shanxi Province, 030002, CN), Hao; Dong (Taiyuan City, Shanxi Province, 030002, CN)


International Classification: E21B 37/00 (20060101); E21B 41/02 (20060101); E21B 43/25 (20060101); E21B 43/27 (20060101)

Expiration Date: 2019-11-07 0:00:00