How many patents does
Cnpc Bohai Drilling Engineering Company have?
patents
1,241
families
1,095
granted
145
applications
1,096
CN
1,239
US
2
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The report contains ten-year analysis with the following sections
- patent filing analysis
- worldwide filing analysis
- patent family analysis
- application analysis
- granted analysis
- classification analysis
- citation analysis
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Cnpc Bohai Drilling Engineering Company
Top ten assignees appearing on patents
2009 - 2018
2018
Cnpc Bohai Drilling Engineering Company
The top ten patent families are
|
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 |