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1. (WO2018144495) LEAK DETECTION FOR DOWNHOLE ISOLATION VALVE

Pub. No.:    WO/2018/144495    International Application No.:    PCT/US2018/016067
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Thu Feb 01 00:59:59 CET 2018
IPC: E21B 34/14
E21B 47/10
Applicants: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Inventors: MCDOWELL, Christopher L.
NOSKE, Joe
Title: LEAK DETECTION FOR DOWNHOLE ISOLATION VALVE
Abstract:
An isolation valve for use with a tubular string includes a tubular housing for connection with the tubular string; a first closure member disposed in the housing and movable between an open position and a closed position; a second closure member disposed in the housing and movable between an open position and a closed position; a chamber formed between the first closure member and the second closure member when the first and second closure members are in the closed position; and a leak detection device configured to measure a fluid flow into the chamber.