Wells – Processes – Placing or shifting well part
Patent
1995-01-30
1996-10-15
Schoeppel, Roger J.
Wells
Processes
Placing or shifting well part
166316, 166387, E21B 3312
Patent
active
055645020
ABSTRACT:
A well control valve assembly prevents flow from or to completion segments further downhole from the well control valve assembly once the stimulation stimulation/shifter string has been removed from the production tubing string. The well control valve assembly features a shaped flapper plate which, when opened, conforms closely to the shape and size of the production tubing string's interior diameter. The flapper plate is biased toward a closed position by a compression spring arrangement that includes an arm which levers the plate upward toward a seating surface. The valve assembly's closure is mechanically induced and is not responsive to a sensed well condition.
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Crow Robert W.
Gano John C.
Hagen Karluf
Le Nam V.
Longbottom James R.
Halliburton Company
Hunter Shawn
Imwalle William M.
Schoeppel Roger J.
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