What are the tests for oil casing couplings

- Jan 17, 2019-

Oil casing couplings, as the name implies, are oil casing couplings for connecting two sucker rods.

The oil casing couplings are threaded at both ends, and the different diameters of the sucker rods can be combined according to the needs. According to the structural features, they are divided into ordinary oil casing couplings, different diameter oil casing couplings and special oil casing couplings. .

It is well known that the oil and oil casing couplings are working underground. It is not so easy to test the quality of the oil casing couplings. So what do you need to do to test the oil casing couplings? Let’s take a look :

In order to further test the oil casing coupling, people have tested the properties of the oil casing and the oil casing, and invented the magnetic permeability testing equipment to use the good magnetic permeability of the oil casing and the oil casing coupling. Implement detection.

The oil casing joints should be selected according to the size of the oil casing and the oil casing coupling. The fixed type of fluorescent magnetic particle flaw detector is mostly fixed because the size and weight of the flaw detector is relatively large. The circumferential magnetization current is generally 0-4000A continuously adjustable AC, and there must be a power-off phase control button, and the current in the longitudinal direction is generally three times the circumferential direction, and there is also a power-off phase control. Features.

The bolting method of the oil casing coupling is generally 0.4MPa for the pneumatic rod air source. The magnetization method is the circumferential, longitudinal and composite magnetization. Therefore, the oil casing coupling should be noted, and the PLC control is easy to operate. There is also a UV intensity of not less than 1000μW/cm2 at a distance of 38 cm from the surface of the workpiece. His working efficiency is 20-40 s/piece. The sensitivity is clearly shown in the A1 60/100 test piece. The power supply for the oil casing coupling is Industrial three-phase four-wire AC, 380V, 50Hz, about 180A.