Coupling
Tubing and casing couplings are the joining of two short length pipe, mainly used for the connection and repair of oil pipe and downhole tools
Tubing and couplings thread types : Non-upset thread(NU), External- upset thread(EU);
Casing and couplings thread types: Long-round thread(LC), Short-round thread(SC), buttress thread(BC)
Grade: K55,J55,N80-1,N80Q,L80-1,P110,etc.
Pup joint
Tubing and casing pup joints are machined according to the latest version of API SPEC 5CT. The steel grade includes J55,K55,N80-1,N80Q,L80-1,P110,etc. There are two types of thread widely used in tubing pup joint namely Non-upset thread(NU), External- upset thread(EU);
Casing and couplings thread types: Long-round thread(LC), Short-round thread(SC), buttress thread(BC).
Our testing and inspection method system is complete, using a whole set of thread instrument to inspect taper, pitch, tooth, height, tooth type,etc. The products have passed the identification of china petroleum pipeline. Quality supervision ,inspection and testing center and gained the unanimous praise from the customers.
Crossover
Crossover coupling any size ,length ,grade and weight is available on customer request.
Steel Grade,Steel Oil Casing Collar,Joint Oil Casing Collar,Pup Joint Oil Casing Collar Henan Dongfanglong Machine Manufacture Co., Ltd , https://www.eastlongmachine.com
Beautiful people or things are of particular concern, as are cars. Today small to introduce to you for an Audi from Henan Erqian second-hand cars Q3 35TFSI 2013 under 2.0T manual precursor Comfort (country â…£) is such a beauty enough to attract your eye models, let us Come to the store to see it's style! 
  Used Audi Q3 detailed parameters please see the table below 
In terms of appearance, the C-pillar with a large angle of inclination is the biggest feature of this car, creating the dynamic of the rare Coupe models of the SUV, the hexagonal design looks more lively, and the inverted trapezoidal headlamps are full of lethality. The daytime driving lights are also the latest design language of Audi. Compared to the previous “light grain†design, it is not even more fashionable. 
In terms of interiors, the overall design still has no difference. After all, Audi's interior design is one of the best in the industry, and there are almost no short boards. The center console of Q3 is slightly tilted to the driver's side, so it is more convenient to operate and has a more three-dimensional visual aspect. Compared with other luxury cars, the center console uses a large area touch screen, and Germans prefer mechanized. Feeling, black matte chrome-plated knob, this combination is difficult to outdated. 
In terms of powertrain and power, the Audi Q3 is equipped with the same 2.0T engine as the imported model. The 35TFSI models have a maximum power of 125kW and a maximum torque of 280Nm. 
  The Malibu is like a Levi's jeans. It is not a high-end brand, but it is well-known. It has its own style, and it is affordable and durable. This is actually an American spirit.
Audi Q3 is located in the urban compact-class SUV model, from the Volkswagen PQ35 platform, dynamic, stylish is the biggest feature of its design.