Duxaoil manufactures sucker rod couplings with quality materials under the requirements of API 11B.
The couplings are manufactured in a range of diameters from 3/4" to 1" and in grades SM and DES according to API 11B. Duxaoil uses standard materials, according to API standards, CNC technology and the latest generation toolkit.
Each piece is controlled with certified gauges by dimensional attributes.
Recommended Practice for the Running and Make Up of API Steel Sucker Rods and Pony Rods
Sucker Rod Couplings
DUR 330 | DUR 331
When resistance to stress corrosion cracking is higher than efficiency of carbon steel couples, Duxaoil developed Durinox couples.
Couples are manufactured with austenitic stainless steel with high levels of nickel and titanium based on AISI 321 in order to increase resistance to corrosion by chemical agents on parts under tension efforts.
DES Class Couplings
When the need of resistance exceeds the class T couplings, Duralitte has developed the DES class couplings.
These coupling are made of special steel, to increase the fluency up to values 980 Mpa and to increase fatigue resistance. These coupling are recommended for deep wells extraction.
SM Class Couplings
The SM coupling is specially developed for highly corrosive environments. The coupling is made with steel of class T, so that it has the same mechanical properties as regards tensile strength and fatigue.
SM class has an outer coating of nickel-chromium basis with a minimum thickness of 200 microns outer diameter thermally fused to the braked, confers to it a hardness ranging from 58 to 62 HRC, which increases wear resistance and increases corrosion resistance. The outer surface is rectified under API roughness values.
T Class Couplings
Duxaoil T class couplings are used for services from medium to low requirements. These couplings are made with tensile strength and fatigue resistance under API requirements.
The couplings are produced in mills CNC lathes with special emphasis on the surface finishing of the threads in order to increase the fatigue life by not cutting the fibers of the base material.
Polished Rod Couplings
Within its product list Duxaoil provides the oil market to stem the couplings PR.