Utility model "Tubing" refers to the field of manufacturing metal tubular goods, namely tubing (tubing) obtained as a result of new technological processes of manufacturing or repairing a used tubing.; In operation, the tubing exposed to internal stresses in the pipe body from different power loads, such as internal pressure of the medium transported by the tubing and the tubing own weight. The action of the internal stress is enhanced corrosion processes under the influence of aggressive components in the produced fluid (a mixture of oil, associated gas, produced water, hydrogen sulfide, carbon dioxide, etc.) or injected into the oil-containing reservoir or reservoirs river water. Actions of power loads and corrosion processes on the metal tubing is often oppositely character, which causes the appropriate nature of the measures aimed at improving the durability and reliability of the tubing.; For example, for the perception of large loads from the internal pressure and weight of the pipe is necessary to increase the strength characteristics of the CNT (yield strength, tensile strength), which causes simultaneous increase in hardness of the metal. However, increasing the hardness of the metal leads to a significant decrease in its resistance to corrosion processes according to the mechanism of hydrogen sulfide cracking.; Significant surface roughness of the inner tubing, due to manufacturing hot-rolled pipes technology processes initiate asfaltosoleparafinistyh Fat (AFS) inside tubing that; It involves the need to clean the pipes from deposits, and hence with increased costs associated with servicing the tubing.; The combination of service properties is possible to provide tubing, changing its structure. Instead of a monolithic body of the pipe run it into bilayer-bimetallic embodiment. The outer layer is made of high strength metal, and it receives a power load, and the inner layer is made of corrosion-resistant internal surface cleanliness with Ra = 0,5-0,8, good withstand various types of corrosion processes.; The technical result from the use of the claimed subject matter is a combination of high strength (due to the outer layer) and high resistance to corrosion (due to internal) layer bimetallic tubing.; The combination of strength and corrosion properties of tubing significantly improves their set of service characteristics, saving material and financial resources in the processes of maintenance and repair of these tubes.
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