Titanium material in Oil Industry

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Since Edwin Drake drilled the first oil well in Titusville, Pennsylvania in 1859, the oil industry has developed rapidly. At present, oil and natural gas have replaced coal as the largest energy source used by humans.

Tubing is the most consumed material in oil and gas drilling. It is not only used in large amounts and expensive, but more importantly, its quality is of great importance to the oil industry. It directly affects the life of a single well of oil and gas wells, and then affects the overall benefits of the oil industry.

With the development of modern drilling and production technologies, oil drilling has begun to develop deeper and more demanding oil and gas wells. Ordinary oil well pipes can no longer meet the demand.

With the further deepening of mining depth, the service environment of oil well pipes has expanded to extremely harsh conditions where corrosive media such as high temperature and high pressure, high CO2, hydrogen sulfide (H2S), and CI- coexist.

Traditional high-end corrosion-resistant oil well pipes generally use nickel-based alloys as raw materials.

However, in the past two years, the limitations of nickel-based alloys have gradually emerged. They are expensive and heavy. They cannot resist under certain harsh environments, such as sulfur corrosion resistance.

Titanium material, the deinsity is 4.51g/cm³, much lighter than Nickel-based alloys. Titanium material also has better corrosion resistance. For example, titanium pipes, using for heat exchanger pipes. Titanium Gr.5(Ti-6Al4V) used for deep hole drilling pipes.

Some advantages of titanium alloy materials in Oil Industry:

  1. Lower density can significantly reduce string load, especially for ultra-deep oil well pipes.
  2. Higher strength includes: tensile strength, creep strength, fatigue strength, etc.
  3. Excellent corrosion resistance, excellent seawater corrosion resistance.
  4. A wide range of operating temperature, the operating temperature of conventional titanium alloys ranges from minus 269 ℃ to minus 600 ℃.
  5. Larger elastic deformation capacity, titanium alloy has high yield strength and low elastic modulus (E), so it is very suitable for springs and other parts, and more importantly, it is suitable for large-reach horizontal wells.
  6. Lower expansion coefficient, this feature makes the petroleum equipment more adaptable to temperature changes and reduces the internal stress of structural parts.
  7. Non-magnetic, suitable for the normal use of some detection, communication and control methods in various equipment.

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