| 摘要 |
Coaxial tubing systems incorporate bending sleeves of insoluble, compression resistant material with cold flow characteristics. Bending sleeves of length coextensive with a bend are dimensioned to substantially fill the annular space between inner and outer coaxial tubes, while also providing longitudinal fluid passageways between the tubes. Such bending sleeves are effective to enable bending of coaxial tubing systems by (a) transmitting bending forces to, from and between inner and outer tubes during bending, (b) restricting tube collapse, wrinkling and deformation during bending, and (c) maintaining spacing between inner and outer tubes after bending and limiting inner tube vibration, while (d) providing fluid passageways between the tubes for leak containment, leak detection, heating, heat dissipation and other auxiliary fluid flow purposes. Conductive spacers are provided for maintaining annular tube spacing, particularly at tube ends, and for enabling electrical grounding of the inner tube.
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