Average Co-Inventor Count = 25.97
ph-index = 1
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Petrochina Company Limited (1 from 159 patents)
2. Cnpc Engineering Technology R&d Company Limited (1 from 19 patents)
1 patent:
1. 11926787 - Well cementing method for improving well cementing quality by controlling hydration heat of cement slurry