05172717 is referenced by 111 patents and cites 11 patents.

An electrically actuated downhole system for controlling and monitoring the flow of gas from a gas lift petroleum well in which a borehole penetrates at least two spacially separated geological production zones, and at least two strings of parallel tubing extend along the interior of a well casing, each string being associated with a separate production zone. Connected to each string is a gas lift valve associated with the string's respective spacially separated production zone. A single source of pressurized gas is connected to the casing at the wellhead to provide a source of lift gas. A control unit located at the surface independently controls and monitors the size of the flow control aperture of each gas lift valve to control the production of fluids from each separate production zone. Control cables carry readings from downhole pressure and flow-rate sensors to the control unit, and in response, carry control signals back to each gas lift valve to control its aperture size.

Title
Well control system
Application Number
457520
Publication Number
5172717
Application Date
November 30, 1990
Publication Date
December 22, 1992
Inventor
Charles M Pool
Euless
TX, US
John J Goiffon
Dallas
TX, US
William G Boyle
Dallas
TX, US
Agent
Johnson & Gibbs
Assignee
Otis Engineering Corporation
TX, US
IPC
F04F 1/20
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