David M Busby

US Patent:

20210280341, Sep 9, 2021

Filed:

Mar 4, 2021

Appl. No.:

17/192670

Inventors:

- Kent WA, US
James Steele - Kent WA, US
Norman E. Keitges - Renton WA, US
David C. Busby - Midland MI, US
Kevin Laux - Kent WA, US
Weston Philips Chapin Ford - Seattle WA, US
Nathanael Laurie - Burien WA, US

International Classification:

H01B 13/32
H01B 13/00
H01B 7/28
H02G 15/04

Abstract:

A method for rejuvenating a strand-blocked cable having a conductor comprised of a plurality of conductor strands with interstitial volume therebetween blocked by a PIB based mastic, the conductor being surrounded by a polymeric cable insulation. The method comprising installing injection adapters that seal the cable ends of the cable and are usable to inject fluid into the interstitial volume between the conductor strands of the cable; elastically expanding the polymeric cable insulation through the application of pressure to the interstitial volume between the conductor strands of the cable; and injecting at least one injection fluid in which the PIB based mastic is at least partially soluble into the interstitial volume between the conductor strands of the cable. To facilitate elastic deformation of the polymeric cable insulation, the cable may be heated to and maintained at a temperature of T above ambient during the injection.