asing pipe is used for protecting subsurface formations. It also protects the bore hole from collapsing.
As an important part of the bore hole, casing has several important functions:
A. Prevent bore hole collapse, the isolation of different formations to prevent liquid convection between the formations, and thus play a role in controlling the drilling fluid and pressure while drilling.
B. Assist ground control equipment and downhole production equipment to achieve their respective functions.
C.For different hole diameters, and material can be with different grades.