Hydraulic test of oil casing

　　Hydrostatic test of casing pipe:

　　①. Use high-pressure water gun to clean the inside of the tube;

　　②. The surface of the thread must be coated with lubricant to minimize damage during the hydrostatic test (plugging and unloading);

　　③. Correctly clamp the workpiece, check whether the various parts of the equipment are running normally;

　　④. Check whether the protective device is safe and reliable;

　　⑤. Water injection and suppression, the suppression time is 7 seconds;

　　⑥. Fill in "Hydrostatic Test Report of Threaded Sleeve" carefully according to the workpiece number.