Causes of Drill Pipe Corrosion Failure

Drill pipe is an indispensable tool in oil extraction work, and it is subjected to complex working conditions such as high temperature and high pressure, strong drilling and rotation force. Therefore, the quality and safety of oil drill pipe is directly related to the stability and safety of extraction work. Casing pipe, tubing and drill string components (drill pipe, drill collar, square drill pipe, etc.) are collectively referred to as oil well pipe (OCTG pipe).

Causes of drill pipe corrosion failure

Drill pipe corrosion failure may be caused by a variety of reasons, among which the most common reasons are as follows:

1. Environmental factors: In drilling operations, drill pipes are often in harsh environments, such as high temperature and high pressure, sulfide-containing wells, etc. These environmental factors will directly lead to corrosion and metal fatigue on the surface of the drill pipe.

2. Drill pipe materials: Drill pipes have many different materials, including carbon steel, alloy steel, etc. Different materials have different chemical compositions and physical properties, which will also affect the corrosion failure of drill pipes.

3. Improper use: In drilling operations, if the operation is improper, such as the use of improper lubricants, coolants or cleaning agents, chemical reactions on the surface of the drill pipe will cause the drill pipe to lose its original physical properties and accelerate the occurrence of corrosion failure.

How to avoid drill pipe corrosion failure

In order to avoid the occurrence of drill pipe corrosion failure, the following measures can be taken:

1. Select the appropriate drill pipe material: Different drill pipe materials have different corrosion resistance, and the appropriate material should be selected according to the wellbore environment.

2. Use appropriate lubricants, coolants or cleaning agents: The use of appropriate lubricants, coolants or cleaning agents can slow down the corrosion of the drill pipe and protect the drill pipe.

3. Control environmental factors in drilling operations: In drilling operations, the influence of environmental factors such as high temperature, high pressure, and sulfide should be avoided as much as possible to reduce the corrosion and metal fatigue of the drill pipe.

4. Regularly inspect the drill pipe: Regularly inspect the surface condition and physical properties of the drill pipe, promptly detect problems such as corrosion and fatigue, and take necessary maintenance and care.

Conclusion

In short, drill pipe corrosion failure is a serious problem that requires the joint efforts of all personnel in drilling operations to prevent and solve it. Selecting appropriate drill pipe materials, using appropriate lubricants, controlling environmental factors and regularly inspecting drill pipes can effectively avoid the occurrence of drill pipe corrosion failure.