What are the Getection Methods of Oil Casings?

What are the detection methods for oil casings?Let's take a brief look:

1. Ultrasonic testing. When ultrasonic waves are scattered in the 

tested raw materials, the acoustic properties of the raw materials and 
the transformation of the internal structure have a positive impact on 
the dissemination of the ultrasonic waves. After the ultrasonic level 
and condition are detected, the functional and structural changes of 
the raw materials are understood. .

2. Radiation detection. Radiation detection is the use of the 
difference in the amount of radiation transmitted through the normal 
parts and defects, and the resolution of the blackness on the film is 
formed.

3. Permeation detection. Penetration detection is the use of liquid 
capillary action, the permeate penetrates the shortcomings of the 
surface opening of the solid raw material, and then through the 
developer to absorb the permeate permeate to the surface to appear the 
defects. Penetration testing is suitable for a variety of metal and 
ceramic workpieces, and from the osmotic manipulation to the 
shortcomings, the light is relatively short, usually about half an 
hour, may be tested surface fatigue, stress corrosion and welding 
cracks, may directly measure the size of the crack.

4. Magnetic particle detection. Magnetic particle detection is the use 
of magnetic flux leakage to absorb magnetic powder, the formation of 
magnetic marks, to provide shortcomings, can detect surface and sub- 
surface defects, shortcomings of this nature, simple identification, 
paint and plating surface does not affect the detection of vividness.

5. Eddy current detection. Eddy current detection If the eddy current 
induced by the ferromagnetic coil in the workpiece is used to analyze 
the internal quality of the workpiece, the surface and near surface 
defects of various conductive materials can be detected. The control 
of common parameters is troublesome, and the detection result is 
difficult to explain. Moreover, it is required that the object to be 
tested must be a conductive crack, and the length of the defect can be 
measured by euphemism.

6. Magnetic flux leakage detection.The magnetic leakage detection of 
oil casing is based on the high magnetic permeability of ferromagnetic 
raw materials. The permeability of the in-service oil casing is 
measured by measuring the permeability change caused by the defects in 
the ferromagnetic raw materials. 

7. Magnetic impression detection. Magnetic impression detection is the 
relationship between the physical nature of the magnetic phenomenon of 
metal and the dislocation process. It has many advantages such as high 
utilization rate, low cost, no need to polish, and has important and 
ordinary use prospects in the industry. 

The above is the detection method of the oil casing.