What is drilling pipe?

Drilling pipe is a crucial component in oil and gas exploration and production. It is a long, cylindrical tube made of steel that is used to bore a hole in the earth's surface.

Drilling pipes come in various sizes and lengths, with diameters ranging from 2 to 50 inches and lengths of up to 150 feet. They are classified into different types based on their thickness, weight, and other properties such as wall thickness, strength, and corrosion resistance.

The most commonly used drilling pipes are seamless pipes, which are manufactured by piercing a solid bar of steel to form a hollow tube. Welded pipes, which are made by fusing two or more pieces of steel together, are also used but are less common due to their lower strength.

Drilling pipes are connected end-to-end to form a drill string, which is rotated by a drilling rig to drill into the earth. The bottom end of the drill string is fitted with a drill bit that cuts through the ground, while the top end is attached to the drilling rig.

Drilling pipes must be able to withstand high temperatures and pressures and resist wear and corrosion from drilling fluids and the surrounding rock. They are subjected to rigorous testing and inspection to ensure their durability and safety.