Tubing/short-circuit thickening/pier roughening process: after heating the tubing end, it is sent to the thickening equipment for upsetting. Plastic deformation occurs at the end of the oil pipe (the inner diameter of the pipe end does not change, and the wall thickness of the pipe end and the effective length of the thick wall section are increased). So as to achieve the purpose of thickening the pipe end. The external thickening process is a complex composite process of upsetting, expanding and extruding. The purpose of thickening is to enhance the strength of the threaded connection of the oil pipe, improve the use time of the threaded connection, avoid the fracture, and extend the life of the oil pipe and prevent accidents!
Types are divided into: short circuit is commonly divided into ordinary short circuit, double male short circuit, overall thickening short circuit
Ordinary short circuit: it is divided into flat (NUE) oil pipe short circuit and thickened (EUE) oil pipe short circuit. Their difference lies in the outer diameter and wall thickness of the pipe body port. Non-thickened short circuit means that the pipe body end is directly threaded at both ends without treatment. Thickened short circuit is through the pipe mouth, the outer diameter at the pipe mouth becomes larger, the wall thickness becomes thicker, and then the thread is processed. This in turn increases the strength and torque of the thread.
Double male short circuit: one end of the standard short circuit is a male thread, the other end is a female buckle (coupling or direct processing), while the duplex short circuit is a male thread at both ends, without coupling or no processing of female buckle
In addition, our company has a batch of API-5CT oil casings in stock and thickened small oil pipes (1.9 ﹤ '-2-7/8 ﹤'),
Product Name: Tubing Coupling Oil Tubing Coupling Thickened Tubing Coupling Flat Tubing Coupling
Material/steel grade: J/K55,N80,L80-1,80SS,L80-3Cr,L8013Cr,L80-9CR, super 13Cr,P110,P110-13CR,TP110S, etc
Specification: OD 55.88-141.3mm(1.315 '-4-1/2')
Thread type: no thickening (NUE), thickening (EUE), special gap (SCC)