Structure and function of tubing casing head

The integrated casing head and tubing head of this utility model are suitable for construction operations such as oil and gas well drilling, cementing, and oil testing. It mainly consists of the casing head body, supporting liner, and tubing head. The casing head body of this device can suspend secondary casing, and after one-time installation, multiple cementing and drilling operations can be completed without replacing wellhead equipment or changing ground facilities. It is a new type of casing head and tubing head with simple structure, good sealing performance, and easy installation and use.

The casing head is generally made of high-quality alloy structural steel with 35 or 42 chromium molybdenum. The function of the casing head is to install a casing hanger inside the casing head, which is used to suspend casing columns of corresponding specifications and seal the annular space gap. An anti spray device group should be installed on it. After the completion of the oil well, a Christmas tree is installed on the casing head.