Wells
Valves, closures or changeable restrictors
Fluid operated
Inventor
active
Annular flow control safety valve
Fluid level controlled safety valve
Locking annulus safety valve
No associations
LandOfFree
Paul W. Black does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Paul W. Black, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Paul W. Black will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-293905