| 摘要 |
FIELD: oil and gas extractive industry. ^ SUBSTANCE: pipe has bearing pipe and concentrically placed thermo-isolated covers, between which end diaphragms are rigidly fixed and a space is present between covers at contact lines. Isolated covers in sections are made linearly of two portions and different metals, and rigidly connected in contact to each other, one portion whereof is made of common assortment, and other one is made of metal capable of remembering shape. Linear length of current engaged portion of the latter is determined on basis of length of sections and temperature difference of inner cover and outer bearing lifting pipe. ^ EFFECT: higher reliability. ^ 2 cl, 1 dwg |
