Puyang Zhongshi Group manufactures full line of downhole rubber cementing plugs to service the drilling and completion operations in the wide world. Their cement plug sizes are available from 2-3/8inch to 20inch (regular plug sizes are 5-1/2inch, 7inch, 9-5/8inch, 13-3/8inch, 18-5/8inch and 20inch).
Puyang Zhongshi Group Co.,Ltd.
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website url
http://www.zs-oilfieldequip.com/industry-news/top-and-bottom-rubber-cementing-plugs-in-drilling.html
address
Mazhuangqiao,Puyang, Henan, China