Oil well casing

Oil well casing is lowered section by section in the wellbore by a drilling machine. The process of lowering oil casing is usually divided into the following steps:

Drilling: First, you need to use a drilling machine to drill a well hole in the ground. Install casing: After drilling to a certain depth, you need to install casing in the wellbore. Casing is generally composed of sections of steel pipe. The length and diameter of the steel pipe are determined according to the depth of the wellbore and geological conditions. The process of installing casing requires the use of casing pliers to place the casing section by section into the wellbore until a predetermined depth is reached. Cementing: After installing the casing, cementing is required. The purpose of cementing is to prevent well wall collapse and to control wellhead pressure. The process of cementing usually involves injecting cement slurry into the gap between the casing and the well wall, allowing it to solidify into a solid wall. Joints: During the installation of casing, joints are required to connect each section of casing. The joint is usually composed of two threaded parts, which are connected by rotation to form a complete oil casing.

In short, oil well casing is lowered section by section in the wellbore by a drilling machine, and steps such as casing installation, cementing, and joints are required. This process requires professional personnel and equipment to operate and monitor to ensure underground safety and stability.