The metal ring gasket is made of metal material composed of forging and heat treatment and machining into a cross-sectional shape of the entity RX type metal gasket having...
Slip type casing head mainly used to fix the drilling wellhead, connect wellhead casing string, casing and production casing support gravity, sealing the annular space between the layers of the tube
After casing cementing, the phenomenon of casing return is occurring in cementing operations of many major oilfields. There are many factors that cause this phenomenon. The most common factors are mainly from the following points.