Cementing tool for plugging well underground


Application Number  00129389 Application Date  2000.12.08
Publication Number  1294244 Publication Date  2001.05.09
Priority Information    
International
Classification
 E21B33/138  
Applicant(s) Name  Research Inst of Oil Recovery Technology, Shengli Oil Field Co Ltd, China Petro-  
Address    
Inventor(s) Name  Wang Minxuan;Wang Shijie;Li Xiliang  
Patent Agency Code  11013 Patent Agent  zhou jinglan
AbstractA cement injecting tool for plugging the lower oil-water layer in oil well with cement can be lowered down to predefined position in well by oil tube and sucker rod or flexible rope. A centralizer sleeves on the central tube with track. Pin or slide key can move along the track. Said tool has seal sleeve cement release type and cement-releasing tube type. For the former, the cement tube, central tube and lower central tube are sequentially linked and the seal sleeve is linked to centralizer. For the latter, the cement tube, central tube, cement releasing tube and cement plag are sequentially linked and the stop ring is linked between centralizer and opening tube.