The construction operation of inserting casing into the wellbore and injecting cement into the annular space between the wellbore and casing is called cementing.
Well cementing is an important operation in the drilling process. In drilling operations, there are generally at least two cementing operations (production wells), and up to 4-5 cementing operations (deep exploration wells).
The top cementing is surface casing cementing, which plays the role of "mud passage, oil and gas gateway".
Before the next drilling, a blowout preventer should be installed on the surface casing to prevent blowouts.
A mud pipe should be installed above the blowout preventer, which is the pathway for drilling fluid to return to the mud pit.
During the drilling process, technical casing cementing is often required, which plays a role in "consolidating the rear and exploring safety".
Like tunnels on highways and tunnels in coal mines, drilling also encounters wellbore collapse, high pressure, and unstable formations.
At the same time, it is also to have a way out in case of danger during the forward "exploration", playing a role in "rescue"
