Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate
2007-12-04
2007-12-04
Mai, Lanna (Department: 3637)
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
C166S386000, C166S319000, C166S323000, C166S324000, C166S332100
Reexamination Certificate
active
11049126
ABSTRACT:
An interventionless actuator for oil well tools is described wherein the actuator comprises at least one floating piston adapted to equalize a pressure differential and lock onto an actuating member. An interventionless actuator is described that is charged to an initial energy level less than the expected at-depth well pressure and then recharged down hole to approximately the at-depth well pressure by a floating piston. At the time of desired interventionless actuation, the actuator is overcharged to a pressure greater than the at-depth well pressure, which pressure is reacted by an actuating piston to generate an actuating movement.
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Bishop Floyd Romaine
Ross Richard J.
Traweek Marvin Bryce
BJ Services Company
Locke Lord Bissell & Liddell LLP
Mai Lanna
Smith Matthew J.
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