H - Electricity – 01 – B
Patent
H - Electricity
01
B
H01B 7/18 (2006.01) H01B 7/04 (2006.01) H01B 7/28 (2006.01) H01B 7/29 (2006.01)
Patent
CA 2085738
The present invention relates to a cable used to supply electric power to a pump for pumping crude oil from an oil well. It is consisted of an insulating layer, a resin sheath and a metallic sheath sequentially layered onto the surface of a conductor. A protective layer comprised by a wrapping of thermal resistant tape is formed at the surface of at least one of the insulating layer and the resin sheath. Due to the provision of this protective layer, it is possible to prevent the breakdown of the insulating layer and the formation of holes in the cable caused by pressure changes occurring when the cable is removed from an oil well within the high pressure environment.
Haruyama Katsuo
Nishino Hideharu
Oogawara Touru
Sunazuka Hideo
Tanida Mitsutaka
Kirby Eades Gale Baker
Ltd. Fujikura
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