Wells – Packers or plugs – With expanding anchor
Patent
1998-09-08
2000-11-07
Dang, Hoang
Wells
Packers or plugs
With expanding anchor
166123, 166125, 166131, E21B 2306
Patent
active
061422266
ABSTRACT:
Apparatus and associated methods are provided which facilitate underbalance 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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Dang Hoang
Halliburton Energy Service,s Inc.
Imwalle William M.
Smith Marlin R.
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