Problems with the wellhead emergency shut-off valve
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Does anyone know how the wellhead emergency shut-off valve adjusts the set pressures for high-pressure and low-pressure protection? Also, how often does the emergency shut-off valve need its hydraulic oil changed?
The owner has a high and low pressure pilot valve in the control section, which is used to set the high and low pressure values; if there is no external leakage of hydraulic oil, it is generally not necessary to top it up
High and low pressure protection activation can be achieved by controlling through instrument signals such as pressure sensing plugs and pressure transmitters. There is no mandatory requirement regarding how often the hydraulic oil should be changed; it is sufficient to replace it promptly whenever issues are detected during maintenance.