Fiberglass Inner Tubes

Fiberglass inner tubes provide low friction core entry and are suitable for all applications including soft or fractured formations or even hard and abrasive formations. Fiberglass inner barrels do not react with chemicals and should be used in high H2S applications. They facilitate ease of cutting when processing the core into one meter lengths and require no special saw blades or lubricating waxes. They can be used in wells with static temperatures as high as 302°F (150°C). And with these tubes as well as aluminum inner tubes, one-way pressure relief valves can be installed for venting gas from the inner tube to the annulus of the core barrel as the core is being pulled to surface.

Fiberglass Tube

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