JB

John D. Barr

CH Camco Drilling Group Limited Of Hycalog: 2 patents #1 of 10Top 10%
📍 Gloucester, CO: #1 of 1 inventorsTop 100%
Overall (1997): #35,943 of 185,788Top 20%
2
Patents 1997

Issued Patents 1997

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5695015 System and method of controlling rotation of a downhole instrument package William C. Motion, Michael K. Russell 1997-12-09
5685379 Method of operating a steerable rotary drilling system John Martin Clegg, William C. Motion 1997-11-11