It is not needed to punch the tubing when this sensor is used to measure the internal pressure, which guarantees the oilstring with higher mechanical strength and keeps Wells in normal production.
The clumsiest most economic object the holes pierced in an oil can to make a fire a folding lantern a ball of string or a floor tile.
最粗糙、最廉价的东西、一个开几个孔来点火的油罐、一只折叠手提灯、—团线或一块地砖。
3
The force state of perforation tube string for testing of oil is analyzed with the finite clearance element method, and the field applied examples prove its reliability and veracity.