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Title of patent family (most common patent title) |
Family members |
Filing year |
---|---|---|
throwing open type multi-cluster sliding sleeve | 3 | 2012 |
oil-based drilling fluid lubricant and preparation method thereof | 2 | 2014 |
multi-stage cracking intelligent control system | 2 | 2015 |
method for preparing polyepichlorohydrin-diethanol amine anti-collapse inhibitor in labo… 🛈 | 2 | 2011 |
low-density and high-strength cement paste | 2 | 2011 |
cementing slurry with high temperature, high density and high toughness | 2 | 2011 |
winding sensor for acidizing operation | 2 | 2013 |
purpose of multi-arm star copolymer used as diverting agent for fracturing and preparati… 🛈 | 2 | 2015 |
anti-swelling and sand-inhibiting agent for high-permeability heavy oil reservoir and pr… 🛈 | 2 | 2015 |
high-temperature-resistant oil-base drilling fluid emulsifier and preparation method the… 🛈 | 2 | 2014 |