Wells – With below and above ground modification – Above ground actuating means for below ground device
Patent
1992-11-20
1994-05-10
Britts, Ramon S.
Wells
With below and above ground modification
Above ground actuating means for below ground device
166237, E21B 2300
Patent
active
053099885
ABSTRACT:
A subsurface well flow control system includes a series of movable sleeve type flow control devices installed in a well flow conductor at various fluid-containing fracture zones, and a shifter tool movable through the conductor and operable to selectively shift any selected number of the sleeve portions of the flow control devices, in either direction between their open and closed positions, without removing the tool from the conductor. Radially retractable anchor and shifter key sets are carried in side wall openings of the tool body, and are respectively configured to be lockingly engaged with interior side surface groove sets on the body and movable sleeve portions of any of the flow control devices. The key sets are spring-biased radially outwardly toward extended positions, and an electromechanical drive system disposed within the tool body is operative to radially retract the key sets, and to axially drive the shifter key set toward or away from the anchor key set. This permits the tool to be moved into and through any of the flow control devices in either axial direction, locked to the device, operated to shift its sleeve portion fully or partially in either direction, and then disengaged from the flow control device and moved to any other one of the flow control devices to shift its sleeve portion. Interengaged V-threads on the body and sleeve portions of each flow control device facilitate the releasable retention of the sleeve portion in a partially shifted position.
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Shy Perry C.
Welch William R.
Britts Ramon S.
Druce Tracy W.
Halliburton Company
Konneker J. Richard
Tsay Frank S.
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