Let’s learn about the core manufacturing technology of stainless steel coiled tubing!
By: mxgy,
First of all, what is stainless steel coiled tubing?
Stainless steel coiled tubing is a new type of oil pipe with a total length of several kilometers and can be bent repeatedly to achieve multiple plastic deformations. Coiled tubing has become an indispensable petroleum equipment in oilfield operations abroad (such as the United States, Canada and other countries).
Do you know? Today’s longest coiled tubing can reach 9000 meters.
The following are the core manufacturing technologies of stainless steel coiled tubing:
1. Chemical elements:
Due to the harsh service environment, coiled tubing has relatively high requirements on the mechanical properties and corrosion resistance of materials. The chemical composition of materials should be optimized and designed, and the whole process of smelting and rolling must be controlled cleanly. Minimize the content of inclusions and harmful elements such as S and P.
2. Processing:
Due to the joint action of work hardening caused by dislocation proliferation and Bauschinger effect, the change law of the tube strength is controlled.
3. Heat treatment:
Heat treatment of the pipe body to achieve the best control of structure and properties, especially high strength and high plasticity and low residual stress.
4. Welding technology:
For the HFW welding technology that is mainly used for low-carbon micro-alloyed steel nowadays, it is necessary to study the optimal welding process parameters (such as voltage, current, frequency, welding speed, forming angle, extrusion amount, etc.), and study the weld seam and weld seam heat treatment technology .
5. Pipe butt joint:
Coiled tubing may cause local damage during use, and the damaged or defective parts must be cut off and the pipes connected by welding. The traditional butt joint method usually adopts manual TIG welding, so the welding quality is difficult to control. At present, the fully automatic welding technology is used.
6. Plate docking:
To achieve continuous production of HFW welded pipes, the plates must be lengthened first. Today’s plate butt joints mainly use methods such as TIG, MAG and plasma welding. The method being studied is the friction stir welding method.
7. New manufacturing technology:
For example, CVR technology, which is a continuous tube made of the same specification tube billet, is heated to 940°C online by medium frequency induction, and through thermomechanical rolling, on the one hand, it realizes the optimization or seamlessness of the HFW weld seam, and on the other hand, it realizes variable wall thickness. or variable diameter. In addition, there are special stainless steel continuous tube laser welding technology.
The above is the introduction of the core manufacturing technology of stainless steel coiled tubing!
Let’s learn about the core manufacturing technology of stainless steel coiled tubing!
By: mxgy,
First of all, what is stainless steel coiled tubing?
Stainless steel coiled tubing is a new type of oil pipe with a total length of several kilometers and can be bent repeatedly to achieve multiple plastic deformations. Coiled tubing has become an indispensable petroleum equipment in oilfield operations abroad (such as the United States, Canada and other countries).
Do you know? Today’s longest coiled tubing can reach 9000 meters.
The following are the core manufacturing technologies of stainless steel coiled tubing:
1. Chemical elements:
Due to the harsh service environment, coiled tubing has relatively high requirements on the mechanical properties and corrosion resistance of materials. The chemical composition of materials should be optimized and designed, and the whole process of smelting and rolling must be controlled cleanly. Minimize the content of inclusions and harmful elements such as S and P.
2. Processing:
Due to the joint action of work hardening caused by dislocation proliferation and Bauschinger effect, the change law of the tube strength is controlled.
3. Heat treatment:
Heat treatment of the pipe body to achieve the best control of structure and properties, especially high strength and high plasticity and low residual stress.
4. Welding technology:
For the HFW welding technology that is mainly used for low-carbon micro-alloyed steel nowadays, it is necessary to study the optimal welding process parameters (such as voltage, current, frequency, welding speed, forming angle, extrusion amount, etc.), and study the weld seam and weld seam heat treatment technology .
5. Pipe butt joint:
Coiled tubing may cause local damage during use, and the damaged or defective parts must be cut off and the pipes connected by welding. The traditional butt joint method usually adopts manual TIG welding, so the welding quality is difficult to control. At present, the fully automatic welding technology is used.
6. Plate docking:
To achieve continuous production of HFW welded pipes, the plates must be lengthened first. Today’s plate butt joints mainly use methods such as TIG, MAG and plasma welding. The method being studied is the friction stir welding method.
7. New manufacturing technology:
For example, CVR technology, which is a continuous tube made of the same specification tube billet, is heated to 940°C online by medium frequency induction, and through thermomechanical rolling, on the one hand, it realizes the optimization or seamlessness of the HFW weld seam, and on the other hand, it realizes variable wall thickness. or variable diameter. In addition, there are special stainless steel continuous tube laser welding technology.
The above is the introduction of the core manufacturing technology of stainless steel coiled tubing!
