| 摘要 |
A safety valve is mounted on an underwater oil well and is remote-controlled from a central control station. The control station is connected to a receiving station, where the valve is disposed, via a single small-section hydraulic line which feeds, at a low rate of flow, a hydropneumatic accumulator for supplying an operating jack of the valve. A manostat switch at the receiving station controls a feed/bleed hydraulic relay of the jack in dependence on the pressures measured in the line at the receiving station. The invention finds application in oil valve safety operations. |
