V-type combination seal

• The V-type combination seal is a multi-lip seal that provides long-term sealing by axially compressing an adjustable packing lid box. It can better handle pressure fluctuations and does not creep on dynamic surfaces, even if it is stationary for long periods of time. This design is effective against drilling mud, downhole fluids, seawater, and kill fluids. It is currently successfully used in the oil and gas industry, such as gas lift valves, downhole safety valves, downhole isolation tools, and typical valves (including gate valves). Valve stem for ball valves and throttle valves. His designs usually operated the valve using a stem, which originated from the outside of the valve and transmitted the action to the inside through a handle or a control device (actuator). The new spring tension seal design, in addition to the original function, can also be self-driven under lower pressure conditions, to achieve a reliable seal, to prevent the lag of pressure consumption, so it has been more and more widely used .