Invention Grant
US08776890B2 Systems and techniques to actuate isolation valves 有权
用于启动隔离阀的系统和技术

Systems and techniques to actuate isolation valves
Abstract:
A tool that is usable in a well and may include an operator, a switch, a resilient device and an indexer. The switch may be configured to selectively communicate a first force to the operator, thereby actuating the tool. The resilient device may exert a second force. The indexer may cycle through a sequence of positions in response to alternating between the second force and a third force. The sequence includes a predetermined position configured to actuate the switch, thereby communicating the first force to the operator to actuate the tool.
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