How to Conduct Hydraulic Test for Oil Casing

Hydraulic test of oil casing is an indispensable link in steel pipe production and manufacturing process, and an important means to test the overall quality of oil pipe. Simply put, it is a test that fills the pipe with water and tests its ability to maintain the prescribed pressure without leakage or rupture under confined condition.

 

Oil casing hydraulic testing machine is used to test the pressure of casing. The experimental pressure is 70 mpa, 95/8",. 7", "51/2", "5", "41/2", "31/2", "27/8" and other casing which meet different specifications of apispec 5ct. Supercharging cylinder is used to boost the pressure, which is fast and reliable. An automatic control system is equipped to display the pressure curve in real time, output the experiment report and save the test data.

 

Oil casing can be divided into different grades according to the strength of steel itself, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Wellbore condition and depth are different, and the steel grade used is also different. In corrosive environment, the casing itself is required to have corrosion resistance. Where geological conditions are complex, casing is also required to have collapse resistance. Petroleum casing is used to support the wellbore of oil and gas wells to ensure the normal operation of the whole well after drilling and completion. Each well should use several layers of casing according to different drilling depth and geological conditions. Cement cementing is used after casing goes down. It is different from tubing and drill pipe. It can not be reused. It belongs to disposable consumable material. Therefore, the consumption of casing accounts for more than 70% of all oil well tubes. Casing can be divided into: conduit, surface casing, technical casing and reservoir casing.