Average Co-Inventor Count = 7.47
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. China Oilfield Services, Limited (2 from 23 patents)
2. China National Offshore Oil Corporation (1 from 29 patents)
2 patents:
1. 11624244 - Connecting structure for drill collar of logging while drilling instrument and drill collar sub male and female joints
2. 10180064 - System for sampling from formation while drilling