초록 ▼

A downhole production well control system is provided for automatically controlling downhole tools in response to sensed selected downhole parameters. The production well having a production tubing string therein with multiple branches, i.e., zones, each including a downhole primary control system.

A downhole production well control system is provided for automatically controlling downhole tools in response to sensed selected downhole parameters. The production well having a production tubing string therein with multiple branches, i.e., zones, each including a downhole primary control system. Each primary control system includes electromechanical drivers and devices to control fluid flow. A redundant control system is associated with each of the primary control systems. Each redundant control system is the identical its corresponding primary control system. The redundant control system is set to a sleep or dormant mode, while the primary control system is set to an active mode for collecting data, and communicating with the surface. In the event of a failure, the primary control system is switched to an inactive mode and the redundant control system is switched to an active mode, whereby it will now collect data, and communicate with the surface. Alternatively, both the primary and redundant control systems are set to an active mode, whereby both systems will collect the same data. The collected data is compared and if there is a difference, then the collected data for each system is checked to determine if the data for each system is within an operating range. If one of the systems contains data that is out-of-range, then the out-of-range system is switched to an inactive mode and the other system continues to collect data and communicate with the surface.

대표청구항 ▼

[ What is claimed is:] [1.] A system for use in a wellbore, comprising:a primary system disposed downhole in the wellbore for effecting at least one of monitoring a wellbore parameter and controlling a condition in the wellbore, said primary system comparing said at least one monitored parameter wit

[ What is claimed is:] [1.] A system for use in a wellbore, comprising:a primary system disposed downhole in the wellbore for effecting at least one of monitoring a wellbore parameter and controlling a condition in the wellbore, said primary system comparing said at least one monitored parameter with a range of stored values; anda redundant system associated with said primary system, said redundant system disposed downhole in the wellbore for effecting said at least one of monitoring said wellbore parameter and controlling said condition in the wellbore, said redundant and said primary systems being in communication with each other, said primary system automatically switches itself off if at least one of the monitored parameters does not fall within the range of stored values, and said redundant system automatically switches itself on.