Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent
1998-09-08
2000-11-28
Neuder, William
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
166386, 1663324, 1663328, 175318, E21B 3412
Patent
active
061522325
ABSTRACT:
Apparatus and associated methods are provided which facilitate underbalanced drilling and completion of wells. In a described embodiment of a well control valve, the valve is opened and closed when a drill string is displaced therethrough. A shifting device is carried on a drill bit and deposited in the valve when the drill string enters and opens the valve. The valve is closed and the shifting device is retrieved from the valve when the drill string is tripped out of the well. A packer hydraulic setting tool usable in conjunction with the well control valve in underbalanced completions is also provided.
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"Underbalanced Completions Improve Well Safety and Productivity", World Oil, Nov. 1995.
"Underbalanced Drilling and Completion Manual" Maurer Engineering, Oct., 1996.
Dennistoun Stuart M.
Meaders Wade
Webb Alan B.
Halliburton Energy Service,s Inc.
Herman Paul I.
Neuder William
Smith Marlin R.
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