Wells – Processes – Producing the well
Reexamination Certificate
2006-12-12
2006-12-12
Bagnell, David (Department: 3672)
Wells
Processes
Producing the well
C166S373000, C166S066600, C166S133000, C166S188000
Reexamination Certificate
active
07147059
ABSTRACT:
A gas-lift petroleum well and method for producing petroleum products using downhole pressurized gas to provide lift. The gas-lift well having a well casing, a production tubing, a packer, and a gas-lift valve. The well casing extends within a wellbore of the well, and the wellbore extends through oil and gas zones. The production tubing extends within the casing. The tubing having an opening formed therein, which is in fluid communication with an oil zone. The packer is located downhole in the casing and coupled to the tubing. The packer can have an electrically controllable packer valve, which is adapted to control a flow of downhole pressurized gas from one side of the packer to another. The downhole pressurized gas is provided by a gas zone that the wellbore passes through. The downhole gas-lift valve is coupled to the tubing and is adapted to control a flow of downhole pressurized gas into oil in the tubing for lifting the oil. The gas-lift valve can be an electrically controllable valve. The tubing and casing are used as electrical conductors for supplying power and/or communications downhole. The current in the tubing is routed using a ferromagnetic induction choke to create a voltage potential, which provides electrical power to downhole electrical devices. Also, there may be a bypass passageway to route downhole gas to gas-lift valves. There may also be downhole sensors to measure physical quantities (e.g., pressure). Such measurements can be used for feedback control of downhole electrically controllable valves.
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Burnett Robert Rex
Carl, Jr. Frederick Gordon
Hall James William
Hirsch John M.
Savage William Mountjoy
Bagnell David
Bomar Shane
Shell Oil Company
Stiegel Rachael
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