APPARATUS FOR PIPELINE INSPECTION AND METHOD OF CONTROLLING SAME
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United States of America Patent
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N/A
Issued Date -
Jul 12, 2012
app pub date -
Jan 10, 2012
filing date -
Jan 10, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An inspection tool for in-line inspection of a pipeline is provided. The inspection tool comprises a flow channel. The inspection tool also comprises a flow control valve assembly comprising: a valve member movable in a first direction for reducing the flow of fluid through the flow channel and in a second direction for increasing the flow of fluid through the flow channel; a motor configured to drive the valve member in the first direction; and a return spring configured to be wound during movement of the valve member in the first direction and to unwind and drive the valve member in the second direction when the motor is not driving the valve member in the first direction. The inspection tool further comprises an electrical circuit configured to regulate the movement of the valve member in the second direction under the action of the return spring.
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