Casing is a kind of large-diameter pipe, which plays the role of fixing the oil and natural gas well wall or well hole. The casing is inserted into the borehole and fixed with cement to prevent the borehole from separating the rock stratum and borehole collapse, and ensure the cyclic movement of drilling mud, so as to facilitate drilling and production. Different types of casing used in oil production:
Surface oil casing
-Protect the drilling from shallow water and shallow gas,
-Support wellhead equipment and maintain the weight of other layers of casing.
Technical oil casing
-Separate the pressure of different layers to ensure the normal flow of drilling fluid and protect the production casing.
-In order to install anti burst device, leak proof device and tail pipe in the drilling.
Reservoir oil casing
-Export oil and natural gas from underground reservoirs.
-It is used to protect the drilling and separate the drilling mud.
When producing oil casing, the outer diameter is usually 114.3 mm to 508 mm
Post time: Dec-23-2021