Patent ID: 9163488
Filing Date: 2015-10-20
Classification: E21B

Abstract:
1. A method of operating a completion string in a subterranean well, the method comprising: coupling a production string to the completion string, wherein a first control line is carried on the production string and a second control line is carried on the completion string; wherein a wet connection is made between the first control line and the second control line; closing a first flow control device and a second flow control device connected in the completion string, the completion string including a first well screen and a second well screen which filter fluid flowing between the completion string and respective ones of a first earth formation zone and a second earth formation zone, wherein a hydraulic control device controls operation of the first flow control device and the second flow control device to variably restrict flow of the fluid through respective ones of the first well screen and the second well screen, wherein the hydraulic control device is disposed within the completion string and wherein the hydraulic control device controls operation of the first flow control device and the second flow control device using a signal transmitted to the hydraulic control device via the first control line and the second control line, and wherein multiple pressure sensors sense pressure of the fluid which flows through respective ones of the first well screen and the second well screen; at least partially opening the first flow control device using the hydraulic control device while the second flow control device remains closed; measuring a first change in the pressure of the fluid as a result of the opening of the first flow control device; and detecting properties of a fluid flowing between the first earth formation zone and the completion string through the first well screen.