Characteristics of seamless casing and tubing

Seamless oil casing, oil and gas exploration in the largest amount of a pipe, it relies on male and female buckle buckle which is screwed inside and outside, will a series deep underground steel pipe work. Oil well casing is the lifeline of its quality directly affects the success of drilling operations and the service life of oil and gas wells, related to the oil fields and the manufacturer's economic benefits.

Seamless Oil casing failure is one of the main problems encountered for each oil field, particularly among the most serious failure of the threaded joint. According to statistics, the oil casing failure occurs in about 64% of accidents threaded connections, the domestic this figure is as high as 86%, securing oil casing threaded joints are the weak link in the oil casing string, therefore, increase the thread connection quality is a key factor in ensuring the quality of the column. Oil casing threaded connections used in the stress distribution directly determines the strength of the connection string. Stress distribution of the parts of the study, not only for manufacturers optimize oil casing thread design, casing and tubing used for predicting the performance provide the basis, but also to guide the proper selection and use of oilfield tubing and casing also has a certain reference value.

The plastic casing and tubing nipple

Seamless oil casing joints is externally threaded male buckle and belt buckle female threaded screw together composed of male and female buckle buckle the contact surface, which is a helical surface, and the oil tube fitting force is more complex. Apart screwed contact pressure generated torque, but also by tension (self-weight of the oil casing), pressure (by the oil, gas or other media caused by) the role of such loads. Oil casing the joint force analysis involves material nonlinearity, geometric nonlinearity and complexity of the contact friction conditions and other nonlinear problems establish a complete and accurate mathematical model, an analytical solution is very difficult.



Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.


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