How many patents does
Cnpc Chuanqing Drilling Engineering Company have?
patents
1,043
families
854
granted
190
applications
853
CN
1,031
US
10
WO
1
RoW
1
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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 Chuanqing Drilling Engineering Company
Top ten assignees appearing on patents
2009 - 2018
Cnpc Chuanqing Drilling Engineering Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| shaft pressure model prediction system controlling method | 6 | 2011 |
| bionic polymer for stabilizing well walls, and preparation method and drilling fluid the… 🛈 | 6 | 2014 |
| crosslinked high molecular weight polymers for use in water-based drilling fluids | 3 | 2015 |
| injecting-plugging method during under-well work | 2 | 2013 |
| solidifiable flow sand bridge plugging method for shaft of oil and gas well | 2 | 2013 |
| hydraulic spray gun for hydraulic jetting and fracturing | 2 | 2013 |
| recoverable whipstock and combined fishing tool thereof | 2 | 2013 |
| blocking method adopting fluid gel for producing blocking valve by formation temperature… 🛈 | 2 | 2013 |
| physical property parameter quantification method based on neural network algorithm | 2 | 2013 |
| fluid gel for generating seal valve plugging air layers by virtue of formation temperatu… 🛈 | 2 | 2013 |