Methods of manufacturing enhanced electrical cables
Disclosed are methods of manufacturing electrical cables. In one embodiment of the invention, method for manufacturing a wellbore cable includes providing at least one insulated conductor, extruding a first polymeric material layer over the insulated conductor, serving a first layer of armor wires around the polymeric material and embedding the armor wires in the first polymeric material by exposure to an electromagnetic radiation source, followed by and extruding a second polymeric material layer over the first layer of armor wires embedded in the first polymeric material layer. Then, a second layer of armor wires may be served around the second polymeric material layer, and embedded therein by exposure to an electromagnetic radiation source. Finally, a third polymeric layer may be extruded around the second layer of armor wires to form a polymeric jacket.
1. A method for manufacturing an electrical cable comprising:
(a) providing at least one insulated conductor;
(b) extruding a first polymeric material layer over the insulated conductor;
(c) serving a first layer of armor wires around the polymeric material and embedding the first layer of armor wires in the first polymeric material by exposure to an electromagnetic radiation source;
(d) extruding a second polymeric material layer over the first layer of armor wires embedded in the first polymeric material layer, wherein the first polymeric material layer is exposed to a second electromagnetic radiation source before extruding the second polymeric material layer over the first layer of armor wires, and wherein the first polymeric layer and second polymeric layer are bonded; and,
(e) exposing the second polymeric material layer to a third electromagnetic radiation source and serving a second layer of armor wires over the second polymeric material layer, and then extruding a third polymeric material layer over the second layer of armor wires, wherein the polymeric layers are bonded.
2. The method according to claim 1 further comprising serving a second layer of armor wires around the second polymeric material layer and embedding the second layer of armor wires by exposure to an electromagnetic radiation source, and extruding a third polymeric layer around the second layer of armor wires wherein the third polymeric material forms a polymeric jacket around the second layer of armor wires.
3. The method according to claim 1 wherein the insulated conductor comprises a plurality of metallic conductors encased in an insulated jacket.
4. The method according to claim 3 wherein the insulated jacket comprises:
(a) a first insulating jacket layer disposed around the metallic conductors wherein the first insulating jacket layer has a first relative permittivity; and
b) a second insulating jacket layer disposed around the first insulating jacket layer and having a second relative permittivity that is less than the first relative permittivity.
5. The method according to claim 4 , wherein the first relative permittivity is within a range of about 2.5 to about 10.0, and wherein the second relative permittivity is within a range of about 1.8 to about 5.0.
6. The method according to claim 1 further comprising a plurality of metallic conductors surrounding the insulated conductor.
7. The method according to claim 1 wherein the first polymeric material layer and the second polymeric material layer are formed from a polymeric material selected from the group consisting of polyolefin, polyamide, polyurethane, thermoplastic polyurethane, polyaryletherether ketone, polyaryl ether ketone, polyphenylene sulfide, modified polyphenylene sulfide, polymers of ethylene-tetrafluoroethylene, polymers of poly(1,4-phenylene), polytetrafluoroethylene, perfluoroalkoxy, fluorinated ethylene propylene, chlorinated ethylene propylene, ethylene chloro-trifluoroethylene, polytetrafluoroethylene-perfluoromethylvinylether, and any mixtures thereof.
8. The method according to claim 1 wherein the first polymeric material layer and the second polymeric material layer are formed from a polymeric material which is an ethylene-tetrafluoroethylene polymer.
9. The method according to claim 1 wherein the first polymeric material layer and the second polymeric material layer are formed from a polymeric material which is a perfluoroalkoxy polymer.
10. The method according to claim 1 wherein the first polymeric material layer and the second polymeric material layer are formed from a polymeric material which is a polytetrafluoroethylene-perfluoromethylvinylether polymer.
11. The method according to claim 1 wherein the first polymeric material layer is formed from a polymeric material which is a fluorinated ethylene propylene polymer.
12. The method according to claim 1 wherein the first polymeric material layer and the second polymeric material layer are formed from a polymeric material comprising reinforcing short and/or milled fibers, reinforcing short and/or milled carbon fibers, nano-carbon fibers, nano-carbon particles, or any mixture thereof.
13. The method according to claim 1 wherein the wellbore cable has an outer diameter from about 0.5 mm to about 400 mm.