How is the drill pipe made and what are the aspects of the production process

How is the drill pipe made and what are the aspects of the production process

If you want to do your job well, you must first sharpen your tools. The improvement of the industry's comprehensive capabilities is inseparable from the development of equipment and tool technology. Oil drilling is the process of opening up channels between the ground and the oil and gas layer, including breaking rocks, removing rock chips to protect the well wall, cementing and completing the well and forming oil and gas channels.Drill Bit

No oil and gas will come out without the drill bit. The drill piDrill Pipepe is the pipe string that transmits torque (i.e., transmits power) to the drill bit, transports mud, and continuously pushes the drill bit to drill.

How is the drill pipe made?

Easily exploitable oil and gas resources are constantly consumed, and the number of oil and gas wells with harsh environments and harsh geological conditions is increasing year by year. The drill pipe needs to withstand high temperature and high pressure, chemical corrosion, high-strength tension and torque in the well; the drilling fluid in the pipe body and the annular reverse mud mixed with sand and gravel

The pressure constantly impacts and wears the drill pipe. How does the drill pipe withstand it?

To build a good body, you need to start with raw materials: most drill pipe manufacturers do not make steel by themselves, but often order raw materials (steel pipes and joints) from steel mills. After receiving the order, the drill pipe manufacturer selects the steel ratio according to the design requirements. The commonly used one is "chrome-molybdenum steel". According to certain requirements, nickel, silicon, vanadium and other elements will be added. The steel mill will produce and supply the drill pipe factory according to the ratio.

Drill pipes comply with the API5DP (American Petroleum Institute) standard, which divides steel into E75, X95, G105, S135 according to strength, and some even use V150. The higher the grade of steel, the greater the strength. Adding different elements such as manganese and molybdenum to steel can improve the strength and hardness of steel, and can also improve high-temperature mechanical properties, making it have good oxidation resistance and corrosion resistance.

The selection of drill tool steel grade needs to be "adapted to local conditions". The higher the steel grade, the greater the mechanical strength, including tensile, torsion, and extrusion strength. But at the same time, the increase in carbon content will also bring bad effects: on the one hand, the corrosion resistance of steel cannot be used for some wells with high hydrogen sulfide, sulfur dioxide and carbon dioxide; on the other hand, the plasticity and toughness of the drill bit will deteriorate. When it encounters the test of large-angle bending at the "dogleg" of horizontal well drilling, it is easy to break because it is too brittle! Therefore, in the elements, the strength, toughness and plasticity of the steel are considered, and "adapt to local conditions" according to the construction requirements. 

The raw materials enter the factory and start processing! 

The processing of drill pipe includes three parts: pipe body processing, joint processing, and friction welding processing.