Average Co-Inventor Count = 3.43
ph-index = 12
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. Weatherford/lamb, Inc. (19 from 1,209 patents)
2. Weatherford Technology Holdings, LLC (3 from 895 patents)
3. Shell Oil Comapny (1 from 7,646 patents)
4. Pdti Holdings, LLC (1 from 13 patents)
5. David J. Brunnert (0 patent)
6. Gregory G. Galloway (0 patent)
23 patents:
1. 11434729 - Expandable liner
2. 10648297 - Expandable liner
3. 9637977 - Methods and apparatus for wellbore construction and completion
4. 9494020 - Multiple diameter expandable straddle system
5. 8534379 - Apparatus and methods for drilling a wellbore using casing
6. 8360160 - Deep water drilling with casing
7. 8127868 - Apparatus and methods for drilling a wellbore using casing
8. 8066069 - Method and apparatus for wellbore construction and completion
9. 8042616 - Apparatus and methods for drilling a wellbore using casing
10. 7997355 - Apparatus for injecting impactors into a fluid stream using a screw extruder
11. 7938201 - Deep water drilling with casing
12. 7823660 - Apparatus and methods for drilling a wellbore using casing
13. 7730965 - Retractable joint and cementing shoe for use in completing a wellbore
14. 7699112 - Sidetrack option for monobore casing string
15. 7409758 - Vibration damper systems for drilling with casing