1. The tube has large mechanical strength and good comprehensive performance.
2. The thread is processed by a special CNC machine tool, with high manufacturing accuracy, reliable service, and long life.
3. It has low cost, can be threaded between each other and repaired easily. The tubing pup joint is an accessory generally used in industrial pipelines. Tubing pup joints can be made of flat style and external upset, of various specifications, and under API specifications. Tubing pup joint is a length of the short pipeline, same as pipelines except for the length. It has various lengths such as 0.25m, 0.5m, 1m, 1.5m, 2m, 2.5m, 3m, 3.5m, etc. A perforated pup joint is used to assemble running string. The casing is the same. Tubing pup joints, same as pipelines, can be divided into NUE and EUE, with or without coupling, male buckle plus male buckle or male buckle plus female buckle, and other forms.
1. Extracting oil and gas: drill a well, fix it, and then put tubing pup joints in the oil-string casing to extract oil and gas to the ground.
2. Water injection: when the underground pressure is not enough, water can be injected into the well through the tubing pup joints.
3. Steam injection: in the process of heavy oil thermal recovery, steam shall be injected through insulated tubing pup joints.
4. Acidification and fracturing: In the later stage of good drilling, to increase the production of oil and gas wells, it is necessary to input acidification and fracturing media or solidification into the oil and gas layer, and the medium and solidification are transported through the short tubing section.