КОБ С
КОБ С
The КОБ С check valves are designed for preventing gas, oil and water inflow from the well through the drill string during the drilling process. The valves are installed in the drill string under the bottom kelly sub.
Standard sizes of valves that are manufactured: КОБ С 127-З-102, КОБ С 133-З-108, КОБ с 146-З-122, КОБ С 155-З-133, КОБ С 165-З-133, КОБ С 178-З-147, КОБ С 203-З-152.